mutter/cogl/cogl-pipeline-fragend-glsl.c

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2008,2009,2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
#include "cogl-pipeline-private.h"
#include "cogl-shader-private.h"
#include "cogl-blend-string.h"
#ifdef COGL_PIPELINE_FRAGEND_GLSL
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-context-private.h"
#include "cogl-handle.h"
#include "cogl-shader-private.h"
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
#include "cogl-program-private.h"
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
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#ifndef HAVE_COGL_GLES2
#define glCreateShader ctx->drv.pf_glCreateShader
#define glGetShaderiv ctx->drv.pf_glGetShaderiv
#define glGetShaderInfoLog ctx->drv.pf_glGetShaderInfoLog
#define glCompileShader ctx->drv.pf_glCompileShader
#define glShaderSource ctx->drv.pf_glShaderSource
#define glDeleteShader ctx->drv.pf_glDeleteShader
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
#endif /* HAVE_COGL_GLES2 */
#include <glib.h>
/*
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
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* GL/GLES compatability defines for pipeline thingies:
*/
/* This might not be defined on GLES */
#ifndef GL_TEXTURE_3D
#define GL_TEXTURE_3D 0x806F
#endif
typedef struct _UnitState
{
unsigned int sampled:1;
unsigned int combine_constant_used:1;
} UnitState;
typedef struct _GlslShaderState
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
int ref_count;
GLuint gl_shader;
GString *header, *source;
UnitState *unit_state;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
/* Age of the user program that was current when the shader was
generated. We need to keep track of this because if the user
program changes then we may need to redecide whether to generate
a shader at all */
unsigned int user_program_age;
} GlslShaderState;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
typedef struct _CoglPipelineFragendGlslPrivate
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
GlslShaderState *glsl_shader_state;
} CoglPipelineFragendGlslPrivate;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
const CoglPipelineFragend _cogl_pipeline_glsl_backend;
static GlslShaderState *
glsl_shader_state_new (int n_layers)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
GlslShaderState *state = g_slice_new0 (GlslShaderState);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
state->ref_count = 1;
state->unit_state = g_new0 (UnitState, n_layers);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
return state;
}
static GlslShaderState *
glsl_shader_state_ref (GlslShaderState *state)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
state->ref_count++;
return state;
}
void
glsl_shader_state_unref (GlslShaderState *state)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_return_if_fail (state->ref_count > 0);
state->ref_count--;
if (state->ref_count == 0)
{
if (state->gl_shader)
GE( glDeleteShader (state->gl_shader) );
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
g_free (state->unit_state);
g_slice_free (GlslShaderState, state);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
}
static CoglPipelineFragendGlslPrivate *
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
get_glsl_priv (CoglPipeline *pipeline)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
if (!(pipeline->fragend_priv_set_mask & COGL_PIPELINE_FRAGEND_GLSL_MASK))
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
return NULL;
return pipeline->fragend_privs[COGL_PIPELINE_FRAGEND_GLSL];
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
static void
set_glsl_priv (CoglPipeline *pipeline, CoglPipelineFragendGlslPrivate *priv)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
if (priv)
{
pipeline->fragend_privs[COGL_PIPELINE_FRAGEND_GLSL] = priv;
pipeline->fragend_priv_set_mask |= COGL_PIPELINE_FRAGEND_GLSL_MASK;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
else
pipeline->fragend_priv_set_mask &= ~COGL_PIPELINE_FRAGEND_GLSL_MASK;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
static GlslShaderState *
get_glsl_shader_state (CoglPipeline *pipeline)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
CoglPipelineFragendGlslPrivate *priv = get_glsl_priv (pipeline);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
if (!priv)
return NULL;
return priv->glsl_shader_state;
}
GLuint
_cogl_pipeline_fragend_glsl_get_shader (CoglPipeline *pipeline)
{
GlslShaderState *glsl_shader_state = get_glsl_shader_state (pipeline);
if (glsl_shader_state)
return glsl_shader_state->gl_shader;
else
return 0;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
static void
dirty_glsl_shader_state (CoglPipeline *pipeline)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
CoglPipelineFragendGlslPrivate *priv;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
priv = get_glsl_priv (pipeline);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
if (!priv)
return;
if (priv->glsl_shader_state)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
glsl_shader_state_unref (priv->glsl_shader_state);
priv->glsl_shader_state = NULL;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
}
static gboolean
_cogl_pipeline_fragend_glsl_start (CoglPipeline *pipeline,
int n_layers,
unsigned long pipelines_difference,
int n_tex_coord_attribs)
{
CoglPipelineFragendGlslPrivate *priv;
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
CoglPipeline *authority;
CoglPipelineFragendGlslPrivate *authority_priv;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
CoglProgram *user_program;
int i;
_COGL_GET_CONTEXT (ctx, FALSE);
if (!cogl_features_available (COGL_FEATURE_SHADERS_GLSL))
return FALSE;
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
user_program = cogl_pipeline_get_user_program (pipeline);
/* If the user fragment shader isn't GLSL then we should let
another backend handle it */
if (user_program &&
_cogl_program_has_fragment_shader (user_program) &&
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
_cogl_program_get_language (user_program) != COGL_SHADER_LANGUAGE_GLSL)
return FALSE;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
/* Now lookup our glsl backend private state (allocating if
* necessary) */
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
priv = get_glsl_priv (pipeline);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
if (!priv)
{
priv = g_slice_new0 (CoglPipelineFragendGlslPrivate);
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
set_glsl_priv (pipeline, priv);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
if (!priv->glsl_shader_state)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
/* If we don't have an associated glsl shader yet then find the
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
* glsl-authority (the oldest ancestor whose state will result in
* the same shader being generated as for this pipeline).
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
*
* We always make sure to associate new shader with the
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
* glsl-authority to maximize the chance that other pipelines can
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
* share it.
*/
authority = _cogl_pipeline_find_equivalent_parent
(pipeline,
COGL_PIPELINE_STATE_AFFECTS_FRAGMENT_CODEGEN &
~COGL_PIPELINE_STATE_LAYERS,
COGL_PIPELINE_LAYER_STATE_AFFECTS_FRAGMENT_CODEGEN);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
authority_priv = get_glsl_priv (authority);
if (!authority_priv)
{
authority_priv = g_slice_new0 (CoglPipelineFragendGlslPrivate);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
set_glsl_priv (authority, authority_priv);
}
/* If we don't have an existing program associated with the
* glsl-authority then start generating code for a new shader...
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
*/
if (!authority_priv->glsl_shader_state)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
GlslShaderState *glsl_shader_state =
glsl_shader_state_new (n_layers);
authority_priv->glsl_shader_state = glsl_shader_state;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
/* If the pipeline isn't actually its own glsl-authority
* then take a reference to the program state associated
* with the glsl-authority... */
if (authority != pipeline)
priv->glsl_shader_state =
glsl_shader_state_ref (authority_priv->glsl_shader_state);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
if (priv->glsl_shader_state->gl_shader)
{
/* If we already have a valid GLSL shader then we don't need to
generate a new one. However if there's a user program and it
has changed since the last link then we do need a new shader */
if (user_program == NULL ||
(priv->glsl_shader_state->user_program_age == user_program->age))
return TRUE;
/* We need to recreate the shader so destroy the existing one */
GE( glDeleteShader (priv->glsl_shader_state->gl_shader) );
priv->glsl_shader_state->gl_shader = 0;
}
/* If we make it here then we have a glsl_shader_state struct
without a gl_shader either because this is the first time we've
encountered it or because the user program has changed */
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
if (user_program)
priv->glsl_shader_state->user_program_age = user_program->age;
/* If the user program contains a fragment shader then we don't need
to generate one */
if (user_program &&
_cogl_program_has_fragment_shader (user_program))
return TRUE;
/* We reuse two grow-only GStrings for code-gen. One string
contains the uniform and attribute declarations while the
other contains the main function. We need two strings
because we need to dynamically declare attributes as the
add_layer callback is invoked */
g_string_set_size (ctx->codegen_header_buffer, 0);
g_string_set_size (ctx->codegen_source_buffer, 0);
priv->glsl_shader_state->header = ctx->codegen_header_buffer;
priv->glsl_shader_state->source = ctx->codegen_source_buffer;
g_string_append (priv->glsl_shader_state->source,
"void\n"
"main ()\n"
"{\n");
for (i = 0; i < n_layers; i++)
cogl-shader: Prepend boilerplate for portable shaders We now prepend a set of defines to any given GLSL shader so that we can define builtin uniforms/attributes within the "cogl" namespace that we can use to provide compatibility across a range of the earlier versions of GLSL. This updates test-cogl-shader-glsl.c and test-shader.c so they no longer needs to special case GLES vs GL when splicing together its shaders as well as the blur, colorize and desaturate effects. To get a feel for the new, portable uniform/attribute names here are the defines for OpenGL vertex shaders: #define cogl_position_in gl_Vertex #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_MultiTexCoord0 #define cogl_tex_coord0_in gl_MultiTexCoord0 #define cogl_tex_coord1_in gl_MultiTexCoord1 #define cogl_tex_coord2_in gl_MultiTexCoord2 #define cogl_tex_coord3_in gl_MultiTexCoord3 #define cogl_tex_coord4_in gl_MultiTexCoord4 #define cogl_tex_coord5_in gl_MultiTexCoord5 #define cogl_tex_coord6_in gl_MultiTexCoord6 #define cogl_tex_coord7_in gl_MultiTexCoord7 #define cogl_normal_in gl_Normal #define cogl_position_out gl_Position #define cogl_point_size_out gl_PointSize #define cogl_color_out gl_FrontColor #define cogl_tex_coord_out gl_TexCoord #define cogl_modelview_matrix gl_ModelViewMatrix #define cogl_modelview_projection_matrix gl_ModelViewProjectionMatrix #define cogl_projection_matrix gl_ProjectionMatrix #define cogl_texture_matrix gl_TextureMatrix And for fragment shaders we have: #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_TexCoord #define cogl_color_out gl_FragColor #define cogl_depth_out gl_FragDepth #define cogl_front_facing gl_FrontFacing
2010-07-23 12:46:41 -04:00
{
priv->glsl_shader_state->unit_state[i].sampled = FALSE;
priv->glsl_shader_state->unit_state[i].combine_constant_used = FALSE;
cogl-shader: Prepend boilerplate for portable shaders We now prepend a set of defines to any given GLSL shader so that we can define builtin uniforms/attributes within the "cogl" namespace that we can use to provide compatibility across a range of the earlier versions of GLSL. This updates test-cogl-shader-glsl.c and test-shader.c so they no longer needs to special case GLES vs GL when splicing together its shaders as well as the blur, colorize and desaturate effects. To get a feel for the new, portable uniform/attribute names here are the defines for OpenGL vertex shaders: #define cogl_position_in gl_Vertex #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_MultiTexCoord0 #define cogl_tex_coord0_in gl_MultiTexCoord0 #define cogl_tex_coord1_in gl_MultiTexCoord1 #define cogl_tex_coord2_in gl_MultiTexCoord2 #define cogl_tex_coord3_in gl_MultiTexCoord3 #define cogl_tex_coord4_in gl_MultiTexCoord4 #define cogl_tex_coord5_in gl_MultiTexCoord5 #define cogl_tex_coord6_in gl_MultiTexCoord6 #define cogl_tex_coord7_in gl_MultiTexCoord7 #define cogl_normal_in gl_Normal #define cogl_position_out gl_Position #define cogl_point_size_out gl_PointSize #define cogl_color_out gl_FrontColor #define cogl_tex_coord_out gl_TexCoord #define cogl_modelview_matrix gl_ModelViewMatrix #define cogl_modelview_projection_matrix gl_ModelViewProjectionMatrix #define cogl_projection_matrix gl_ProjectionMatrix #define cogl_texture_matrix gl_TextureMatrix And for fragment shaders we have: #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_TexCoord #define cogl_color_out gl_FragColor #define cogl_depth_out gl_FragDepth #define cogl_front_facing gl_FrontFacing
2010-07-23 12:46:41 -04:00
}
return TRUE;
}
static void
add_constant_lookup (GlslShaderState *glsl_shader_state,
CoglPipeline *pipeline,
CoglPipelineLayer *layer,
const char *swizzle)
{
int unit_index = _cogl_pipeline_layer_get_unit_index (layer);
/* Create a sampler uniform for this layer if we haven't already */
if (!glsl_shader_state->unit_state[unit_index].combine_constant_used)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
g_string_append_printf (glsl_shader_state->header,
"uniform vec4 _cogl_layer_constant_%i;\n",
unit_index);
glsl_shader_state->unit_state[unit_index].combine_constant_used = TRUE;
}
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
g_string_append_printf (glsl_shader_state->source,
"_cogl_layer_constant_%i.%s",
unit_index, swizzle);
}
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
static void
add_texture_lookup (GlslShaderState *glsl_shader_state,
CoglPipeline *pipeline,
CoglPipelineLayer *layer,
const char *swizzle)
{
CoglHandle texture;
int unit_index = _cogl_pipeline_layer_get_unit_index (layer);
const char *target_string, *tex_coord_swizzle;
texture = _cogl_pipeline_layer_get_texture (layer);
cogl-shader: Prepend boilerplate for portable shaders We now prepend a set of defines to any given GLSL shader so that we can define builtin uniforms/attributes within the "cogl" namespace that we can use to provide compatibility across a range of the earlier versions of GLSL. This updates test-cogl-shader-glsl.c and test-shader.c so they no longer needs to special case GLES vs GL when splicing together its shaders as well as the blur, colorize and desaturate effects. To get a feel for the new, portable uniform/attribute names here are the defines for OpenGL vertex shaders: #define cogl_position_in gl_Vertex #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_MultiTexCoord0 #define cogl_tex_coord0_in gl_MultiTexCoord0 #define cogl_tex_coord1_in gl_MultiTexCoord1 #define cogl_tex_coord2_in gl_MultiTexCoord2 #define cogl_tex_coord3_in gl_MultiTexCoord3 #define cogl_tex_coord4_in gl_MultiTexCoord4 #define cogl_tex_coord5_in gl_MultiTexCoord5 #define cogl_tex_coord6_in gl_MultiTexCoord6 #define cogl_tex_coord7_in gl_MultiTexCoord7 #define cogl_normal_in gl_Normal #define cogl_position_out gl_Position #define cogl_point_size_out gl_PointSize #define cogl_color_out gl_FrontColor #define cogl_tex_coord_out gl_TexCoord #define cogl_modelview_matrix gl_ModelViewMatrix #define cogl_modelview_projection_matrix gl_ModelViewProjectionMatrix #define cogl_projection_matrix gl_ProjectionMatrix #define cogl_texture_matrix gl_TextureMatrix And for fragment shaders we have: #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_TexCoord #define cogl_color_out gl_FragColor #define cogl_depth_out gl_FragDepth #define cogl_front_facing gl_FrontFacing
2010-07-23 12:46:41 -04:00
if (texture == COGL_INVALID_HANDLE)
{
target_string = "2D";
tex_coord_swizzle = "st";
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
else
{
GLenum gl_target;
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
cogl_texture_get_gl_texture (texture, NULL, &gl_target);
switch (gl_target)
{
#ifndef HAVE_COGL_GLES2
case GL_TEXTURE_1D:
target_string = "1D";
tex_coord_swizzle = "s";
break;
#endif
case GL_TEXTURE_2D:
target_string = "2D";
tex_coord_swizzle = "st";
break;
#ifdef GL_ARB_texture_rectangle
case GL_TEXTURE_RECTANGLE_ARB:
target_string = "2DRect";
tex_coord_swizzle = "st";
break;
cogl-shader: Prepend boilerplate for portable shaders We now prepend a set of defines to any given GLSL shader so that we can define builtin uniforms/attributes within the "cogl" namespace that we can use to provide compatibility across a range of the earlier versions of GLSL. This updates test-cogl-shader-glsl.c and test-shader.c so they no longer needs to special case GLES vs GL when splicing together its shaders as well as the blur, colorize and desaturate effects. To get a feel for the new, portable uniform/attribute names here are the defines for OpenGL vertex shaders: #define cogl_position_in gl_Vertex #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_MultiTexCoord0 #define cogl_tex_coord0_in gl_MultiTexCoord0 #define cogl_tex_coord1_in gl_MultiTexCoord1 #define cogl_tex_coord2_in gl_MultiTexCoord2 #define cogl_tex_coord3_in gl_MultiTexCoord3 #define cogl_tex_coord4_in gl_MultiTexCoord4 #define cogl_tex_coord5_in gl_MultiTexCoord5 #define cogl_tex_coord6_in gl_MultiTexCoord6 #define cogl_tex_coord7_in gl_MultiTexCoord7 #define cogl_normal_in gl_Normal #define cogl_position_out gl_Position #define cogl_point_size_out gl_PointSize #define cogl_color_out gl_FrontColor #define cogl_tex_coord_out gl_TexCoord #define cogl_modelview_matrix gl_ModelViewMatrix #define cogl_modelview_projection_matrix gl_ModelViewProjectionMatrix #define cogl_projection_matrix gl_ProjectionMatrix #define cogl_texture_matrix gl_TextureMatrix And for fragment shaders we have: #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_TexCoord #define cogl_color_out gl_FragColor #define cogl_depth_out gl_FragDepth #define cogl_front_facing gl_FrontFacing
2010-07-23 12:46:41 -04:00
#endif
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
case GL_TEXTURE_3D:
target_string = "3D";
tex_coord_swizzle = "stp";
break;
default:
g_assert_not_reached ();
}
}
/* Create a sampler uniform for this layer if we haven't already */
if (!glsl_shader_state->unit_state[unit_index].sampled)
{
g_string_append_printf (glsl_shader_state->header,
"uniform sampler%s _cogl_sampler_%i;\n",
target_string,
unit_index);
glsl_shader_state->unit_state[unit_index].sampled = TRUE;
}
g_string_append_printf (glsl_shader_state->source,
"texture%s (_cogl_sampler_%i, ",
target_string, unit_index);
/* If point sprite coord generation is being used then divert to the
built-in varying var for that instead of the texture
coordinates. We don't want to do this under GL because in that
case we will instead use glTexEnv(GL_COORD_REPLACE) to replace
the texture coords with the point sprite coords. Although GL also
supports the gl_PointCoord variable, it requires GLSL 1.2 which
would mean we would have to declare the GLSL version and check
for it */
#ifdef HAVE_COGL_GLES2
if (cogl_pipeline_get_layer_point_sprite_coords_enabled (pipeline,
layer->index))
g_string_append_printf (glsl_shader_state->source,
"gl_PointCoord.%s",
tex_coord_swizzle);
else
#endif
g_string_append_printf (glsl_shader_state->source,
"cogl_tex_coord_in[%d].%s",
unit_index, tex_coord_swizzle);
g_string_append_printf (glsl_shader_state->source, ").%s", swizzle);
}
typedef struct
{
int unit_index;
CoglPipelineLayer *layer;
} FindPipelineLayerData;
static gboolean
find_pipeline_layer_cb (CoglPipelineLayer *layer,
void *user_data)
{
FindPipelineLayerData *data = user_data;
int unit_index;
unit_index = _cogl_pipeline_layer_get_unit_index (layer);
if (unit_index == data->unit_index)
{
data->layer = layer;
return FALSE;
}
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
return TRUE;
}
static void
add_arg (GlslShaderState *glsl_shader_state,
CoglPipeline *pipeline,
CoglPipelineLayer *layer,
CoglPipelineCombineSource src,
CoglPipelineCombineOp operand,
const char *swizzle)
{
GString *shader_source = glsl_shader_state->source;
char alpha_swizzle[5] = "aaaa";
g_string_append_c (shader_source, '(');
if (operand == COGL_PIPELINE_COMBINE_OP_ONE_MINUS_SRC_COLOR ||
operand == COGL_PIPELINE_COMBINE_OP_ONE_MINUS_SRC_ALPHA)
g_string_append_printf (shader_source,
"vec4(1.0, 1.0, 1.0, 1.0).%s - ",
swizzle);
/* If the operand is reading from the alpha then replace the swizzle
with the same number of copies of the alpha */
if (operand == COGL_PIPELINE_COMBINE_OP_SRC_ALPHA ||
operand == COGL_PIPELINE_COMBINE_OP_ONE_MINUS_SRC_ALPHA)
{
alpha_swizzle[strlen (swizzle)] = '\0';
swizzle = alpha_swizzle;
}
switch (src)
{
case COGL_PIPELINE_COMBINE_SOURCE_TEXTURE:
add_texture_lookup (glsl_shader_state,
pipeline,
layer,
swizzle);
break;
case COGL_PIPELINE_COMBINE_SOURCE_CONSTANT:
add_constant_lookup (glsl_shader_state,
pipeline,
layer,
swizzle);
break;
case COGL_PIPELINE_COMBINE_SOURCE_PREVIOUS:
if (_cogl_pipeline_layer_get_unit_index (layer) > 0)
{
g_string_append_printf (shader_source, "cogl_color_out.%s", swizzle);
break;
}
/* flow through */
case COGL_PIPELINE_COMBINE_SOURCE_PRIMARY_COLOR:
g_string_append_printf (shader_source, "cogl_color_in.%s", swizzle);
break;
default:
if (src >= COGL_PIPELINE_COMBINE_SOURCE_TEXTURE0 &&
src < COGL_PIPELINE_COMBINE_SOURCE_TEXTURE0 + 32)
{
FindPipelineLayerData data;
data.unit_index = src - COGL_PIPELINE_COMBINE_SOURCE_TEXTURE0;
data.layer = layer;
_cogl_pipeline_foreach_layer_internal (pipeline,
find_pipeline_layer_cb,
&data);
add_texture_lookup (glsl_shader_state,
pipeline,
data.layer,
swizzle);
}
break;
}
g_string_append_c (shader_source, ')');
}
static void
append_masked_combine (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
const char *swizzle,
CoglPipelineCombineFunc function,
CoglPipelineCombineSource *src,
CoglPipelineCombineOp *op)
{
GlslShaderState *glsl_shader_state = get_glsl_shader_state (pipeline);
GString *shader_source = glsl_shader_state->source;
g_string_append_printf (glsl_shader_state->source,
" cogl_color_out.%s = ", swizzle);
switch (function)
{
case COGL_PIPELINE_COMBINE_FUNC_REPLACE:
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], swizzle);
break;
case COGL_PIPELINE_COMBINE_FUNC_MODULATE:
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], swizzle);
g_string_append (shader_source, " * ");
add_arg (glsl_shader_state, pipeline, layer,
src[1], op[1], swizzle);
break;
case COGL_PIPELINE_COMBINE_FUNC_ADD:
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], swizzle);
g_string_append (shader_source, " + ");
add_arg (glsl_shader_state, pipeline, layer,
src[1], op[1], swizzle);
break;
case COGL_PIPELINE_COMBINE_FUNC_ADD_SIGNED:
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], swizzle);
g_string_append (shader_source, " + ");
add_arg (glsl_shader_state, pipeline, layer,
src[1], op[1], swizzle);
g_string_append_printf (shader_source,
" - vec4(0.5, 0.5, 0.5, 0.5).%s",
swizzle);
break;
case COGL_PIPELINE_COMBINE_FUNC_SUBTRACT:
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], swizzle);
g_string_append (shader_source, " - ");
add_arg (glsl_shader_state, pipeline, layer,
src[1], op[1], swizzle);
break;
case COGL_PIPELINE_COMBINE_FUNC_INTERPOLATE:
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], swizzle);
g_string_append (shader_source, " * ");
add_arg (glsl_shader_state, pipeline, layer,
src[2], op[2], swizzle);
g_string_append (shader_source, " + ");
add_arg (glsl_shader_state, pipeline, layer,
src[1], op[1], swizzle);
g_string_append_printf (shader_source,
" * (vec4(1.0, 1.0, 1.0, 1.0).%s - ",
swizzle);
add_arg (glsl_shader_state, pipeline, layer,
src[2], op[2], swizzle);
g_string_append_c (shader_source, ')');
break;
case COGL_PIPELINE_COMBINE_FUNC_DOT3_RGB:
case COGL_PIPELINE_COMBINE_FUNC_DOT3_RGBA:
g_string_append (shader_source, "vec4(4.0 * ((");
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], "r");
g_string_append (shader_source, " - 0.5) * (");
add_arg (glsl_shader_state, pipeline, layer,
src[1], op[1], "r");
g_string_append (shader_source, " - 0.5) + (");
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], "g");
g_string_append (shader_source, " - 0.5) * (");
add_arg (glsl_shader_state, pipeline, layer,
src[1], op[1], "g");
g_string_append (shader_source, " - 0.5) + (");
add_arg (glsl_shader_state, pipeline, layer,
src[0], op[0], "b");
g_string_append (shader_source, " - 0.5) * (");
add_arg (glsl_shader_state, pipeline, layer,
src[1], op[1], "b");
g_string_append_printf (shader_source, " - 0.5))).%s", swizzle);
break;
}
g_string_append_printf (shader_source, ";\n");
}
static gboolean
_cogl_pipeline_fragend_glsl_add_layer (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
unsigned long layers_difference)
{
GlslShaderState *glsl_shader_state = get_glsl_shader_state (pipeline);
CoglPipelineLayer *combine_authority =
_cogl_pipeline_layer_get_authority (layer,
COGL_PIPELINE_LAYER_STATE_COMBINE);
CoglPipelineLayerBigState *big_state = combine_authority->big_state;
if (!glsl_shader_state->source)
return TRUE;
if (!_cogl_pipeline_need_texture_combine_separate (combine_authority) ||
/* GL_DOT3_RGBA Is a bit weird as a GL_COMBINE_RGB function
* since if you use it, it overrides your ALPHA function...
*/
big_state->texture_combine_rgb_func ==
COGL_PIPELINE_COMBINE_FUNC_DOT3_RGBA)
append_masked_combine (pipeline,
layer,
"rgba",
big_state->texture_combine_rgb_func,
big_state->texture_combine_rgb_src,
big_state->texture_combine_rgb_op);
else
{
append_masked_combine (pipeline,
layer,
"rgb",
big_state->texture_combine_rgb_func,
big_state->texture_combine_rgb_src,
big_state->texture_combine_rgb_op);
append_masked_combine (pipeline,
layer,
"a",
big_state->texture_combine_alpha_func,
big_state->texture_combine_alpha_src,
big_state->texture_combine_alpha_op);
}
return TRUE;
}
gboolean
_cogl_pipeline_fragend_glsl_passthrough (CoglPipeline *pipeline)
{
GlslShaderState *glsl_shader_state = get_glsl_shader_state (pipeline);
if (!glsl_shader_state->source)
return TRUE;
g_string_append (glsl_shader_state->source,
" cogl_color_out = cogl_color_in;\n");
return TRUE;
}
/* GLES2 doesn't have alpha testing so we need to implement it in the
shader */
#ifdef HAVE_COGL_GLES2
static void
add_alpha_test_snippet (CoglPipeline *pipeline,
GlslShaderState *glsl_shader_state)
{
CoglPipelineAlphaFunc alpha_func;
alpha_func = cogl_pipeline_get_alpha_test_function (pipeline);
if (alpha_func == COGL_PIPELINE_ALPHA_FUNC_ALWAYS)
/* Do nothing */
return;
if (alpha_func == COGL_PIPELINE_ALPHA_FUNC_NEVER)
{
/* Always discard the fragment */
g_string_append (glsl_shader_state->source,
" discard;\n");
return;
}
/* For all of the other alpha functions we need a uniform for the
reference */
g_string_append (glsl_shader_state->header,
"uniform float _cogl_alpha_test_ref;\n");
g_string_append (glsl_shader_state->source,
" if (cogl_color_out.a ");
switch (alpha_func)
{
case COGL_PIPELINE_ALPHA_FUNC_LESS:
g_string_append (glsl_shader_state->source, ">=");
break;
case COGL_PIPELINE_ALPHA_FUNC_EQUAL:
g_string_append (glsl_shader_state->source, "!=");
break;
case COGL_PIPELINE_ALPHA_FUNC_LEQUAL:
g_string_append (glsl_shader_state->source, ">");
break;
case COGL_PIPELINE_ALPHA_FUNC_GREATER:
g_string_append (glsl_shader_state->source, "<=");
break;
case COGL_PIPELINE_ALPHA_FUNC_NOTEQUAL:
g_string_append (glsl_shader_state->source, "==");
break;
case COGL_PIPELINE_ALPHA_FUNC_GEQUAL:
g_string_append (glsl_shader_state->source, "< ");
break;
case COGL_PIPELINE_ALPHA_FUNC_ALWAYS:
case COGL_PIPELINE_ALPHA_FUNC_NEVER:
g_assert_not_reached ();
break;
}
g_string_append (glsl_shader_state->source,
" _cogl_alpha_test_ref)\n discard;\n");
}
#endif /* HAVE_COGL_GLES2 */
gboolean
_cogl_pipeline_fragend_glsl_end (CoglPipeline *pipeline,
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
unsigned long pipelines_difference)
{
GlslShaderState *glsl_shader_state = get_glsl_shader_state (pipeline);
_COGL_GET_CONTEXT (ctx, FALSE);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
if (glsl_shader_state->source)
{
const char *source_strings[2];
GLint lengths[2];
GLint compile_status;
GLuint shader;
int n_tex_coord_attribs = 0;
int i, n_layers;
COGL_STATIC_COUNTER (fragend_glsl_compile_counter,
"glsl fragment compile counter",
"Increments each time a new GLSL "
"fragment shader is compiled",
0 /* no application private data */);
COGL_COUNTER_INC (_cogl_uprof_context, fragend_glsl_compile_counter);
#ifdef HAVE_COGL_GLES2
add_alpha_test_snippet (pipeline, glsl_shader_state);
#endif
g_string_append (glsl_shader_state->source, "}\n");
GE_RET( shader, glCreateShader (GL_FRAGMENT_SHADER) );
lengths[0] = glsl_shader_state->header->len;
source_strings[0] = glsl_shader_state->header->str;
lengths[1] = glsl_shader_state->source->len;
source_strings[1] = glsl_shader_state->source->str;
/* Find the highest texture unit that is sampled to pass as the
number of texture coordinate attributes */
n_layers = cogl_pipeline_get_n_layers (pipeline);
for (i = 0; i < n_layers; i++)
if (glsl_shader_state->unit_state[i].sampled)
n_tex_coord_attribs = i + 1;
_cogl_shader_set_source_with_boilerplate (shader, GL_FRAGMENT_SHADER,
n_tex_coord_attribs,
2, /* count */
source_strings, lengths);
GE( glCompileShader (shader) );
GE( glGetShaderiv (shader, GL_COMPILE_STATUS, &compile_status) );
if (!compile_status)
{
GLint len = 0;
char *shader_log;
GE( glGetShaderiv (shader, GL_INFO_LOG_LENGTH, &len) );
shader_log = g_alloca (len);
GE( glGetShaderInfoLog (shader, len, &len, shader_log) );
g_warning ("Shader compilation failed:\n%s", shader_log);
}
glsl_shader_state->header = NULL;
glsl_shader_state->source = NULL;
glsl_shader_state->gl_shader = shader;
}
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
return TRUE;
}
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
static void
_cogl_pipeline_fragend_glsl_pre_change_notify (CoglPipeline *pipeline,
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
CoglPipelineState change,
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
const CoglColor *new_color)
{
if ((change & COGL_PIPELINE_STATE_AFFECTS_FRAGMENT_CODEGEN))
dirty_glsl_shader_state (pipeline);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
/* NB: layers are considered immutable once they have any dependants
* so although multiple pipelines can end up depending on a single
* static layer, we can guarantee that if a layer is being *changed*
* then it can only have one pipeline depending on it.
*
* XXX: Don't forget this is *pre* change, we can't read the new value
* yet!
*/
static void
_cogl_pipeline_fragend_glsl_layer_pre_change_notify (
CoglPipeline *owner,
CoglPipelineLayer *layer,
CoglPipelineLayerState change)
{
CoglPipelineFragendGlslPrivate *priv;
priv = get_glsl_priv (owner);
if (!priv)
return;
if ((change & COGL_PIPELINE_LAYER_STATE_AFFECTS_FRAGMENT_CODEGEN))
{
dirty_glsl_shader_state (owner);
return;
}
/* TODO: we could be saving snippets of texture combine code along
* with each layer and then when a layer changes we would just free
* the snippet. */
}
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
static void
_cogl_pipeline_fragend_glsl_free_priv (CoglPipeline *pipeline)
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
{
CoglPipelineFragendGlslPrivate *priv = get_glsl_priv (pipeline);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
if (priv)
{
if (priv->glsl_shader_state)
glsl_shader_state_unref (priv->glsl_shader_state);
g_slice_free (CoglPipelineFragendGlslPrivate, priv);
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
set_glsl_priv (pipeline, NULL);
Merge cogl-program-{gl,gles}.c into one cogl-program.c This merges the two implementations of CoglProgram for the GLES2 and GL backends into one. The implementation is more like the GLES2 version which would track the uniform values and delay sending them to GL. CoglProgram is now effectively just a GList of CoglShaders along with an array of stored uniform values. CoglProgram never actually creates a GL program, instead this is left up to the GLSL material backend. This is necessary on GLES2 where we may need to relink the user's program with different generated shaders depending on the other emulated fixed function state. It will also be necessary in the future GLSL backends for regular OpenGL. The GLSL and ARBfp material backends are now the ones that create and link the GL program from the list of shaders. The linked program is attached to the private material state so that it can be reused if the CoglProgram is used again with the same material. This does mean the program will get relinked if the shader is used with multiple materials. This will be particularly bad if the legacy cogl_program_use function is used because that effectively always makes one-shot materials. This problem will hopefully be alleviated if we make a hash table with a cache of generated programs. The cogl program would then need to become part of the hash lookup. Each CoglProgram now has an age counter which is incremented every time a shader is added. This is used by the material backends to detect when we need to create a new GL program for the user program. The internal _cogl_use_program function now takes a GL program handle rather than a CoglProgram. It no longer needs any special differences for GLES2. The GLES2 wrapper function now also uses this function to bind its generated shaders. The ARBfp shaders no longer store a copy of the program source but instead just directly create a program object when cogl_shader_source is called. This avoids having to reupload the source if the same shader is used in multiple materials. There are currently a few gross hacks to get the GLES2 backend to work with this. The problem is that the GLSL material backend is now generating a complete GL program but the GLES2 wrapper still needs to add its fixed function emulation shaders if the program doesn't provide either a vertex or fragment shader. There is a new function in the GLES2 wrapper called _cogl_gles2_use_program which replaces the previous cogl_program_use implementation. It extracts the GL shaders from the GL program object and creates a new GL program containing all of the shaders plus its fixed function emulation. This new program is returned to the GLSL material backend so that it can still flush the custom uniforms using it. The user_program is attached to the GLES2 settings struct as before but its stored using a GL program handle rather than a CoglProgram pointer. This hack will go away once the GLSL material backend replaces the GLES2 wrapper by generating the code itself. Under Mesa this currently generates some GL errors when glClear is called in test-cogl-shader-glsl. I think this is due to a bug in Mesa however. When the user program on the material is changed the GLSL backend gets notified and deletes the GL program that it linked from the user shaders. The program will still be bound in GL however. Leaving a deleted shader bound exposes a bug in Mesa's glClear implementation. More details are here: https://bugs.freedesktop.org/show_bug.cgi?id=31194
2010-10-15 13:00:29 -04:00
}
}
const CoglPipelineFragend _cogl_pipeline_glsl_fragend =
{
_cogl_pipeline_fragend_glsl_start,
_cogl_pipeline_fragend_glsl_add_layer,
_cogl_pipeline_fragend_glsl_passthrough,
_cogl_pipeline_fragend_glsl_end,
_cogl_pipeline_fragend_glsl_pre_change_notify,
cogl: rename CoglMaterial -> CoglPipeline This applies an API naming change that's been deliberated over for a while now which is to rename CoglMaterial to CoglPipeline. For now the new pipeline API is marked as experimental and public headers continue to talk about materials not pipelines. The CoglMaterial API is now maintained in terms of the cogl_pipeline API internally. Currently this API is targeting Cogl 2.0 so we will have time to integrate it properly with other upcoming Cogl 2.0 work. The basic reasons for the rename are: - That the term "material" implies to many people that they are constrained to fragment processing; perhaps as some kind of high-level texture abstraction. - In Clutter they get exposed by ClutterTexture actors which may be re-inforcing this misconception. - When comparing how other frameworks use the term material, a material sometimes describes a multi-pass fragment processing technique which isn't the case in Cogl. - In code, "CoglPipeline" will hopefully be a much more self documenting summary of what these objects represent; a full GPU pipeline configuration including, for example, vertex processing, fragment processing and blending. - When considering the API documentation story, at some point we need a document introducing developers to how the "GPU pipeline" works so it should become intuitive that CoglPipeline maps back to that description of the GPU pipeline. - This is consistent in terminology and concept to OpenGL 4's new pipeline object which is a container for program objects. Note: The cogl-material.[ch] files have been renamed to cogl-material-compat.[ch] because otherwise git doesn't seem to treat the change as a moving the old cogl-material.c->cogl-pipeline.c and so we loose all our git-blame history.
2010-10-27 13:54:57 -04:00
NULL, /* pipeline_set_parent_notify */
_cogl_pipeline_fragend_glsl_layer_pre_change_notify,
_cogl_pipeline_fragend_glsl_free_priv,
};
#endif /* COGL_PIPELINE_FRAGEND_GLSL */