mutter/cogl/cogl-shader.c

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/*
* Cogl
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*
* An object oriented GL/GLES Abstraction/Utility Layer
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*
* Copyright (C) 2007,2008,2009,2010 Intel Corporation.
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*
* 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/>.
*
*
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*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-shader-private.h"
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
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#include "cogl-shader-boilerplate.h"
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#include "cogl-internal.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include <glib.h>
#include <string.h>
#ifdef HAVE_COGL_GL
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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#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
#define glProgramString ctx->drv.pf_glProgramString
#define glBindProgram ctx->drv.pf_glBindProgram
#define glDeletePrograms ctx->drv.pf_glDeletePrograms
#define glGenPrograms ctx->drv.pf_glGenPrograms
#define GET_CONTEXT _COGL_GET_CONTEXT
#else
#define GET_CONTEXT(CTXVAR,RETVAL) G_STMT_START { } G_STMT_END
#endif
#ifndef HAVE_COGL_GLES
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static void _cogl_shader_free (CoglShader *shader);
COGL_HANDLE_DEFINE (Shader, shader);
COGL_OBJECT_DEFINE_DEPRECATED_REF_COUNTING (shader);
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static void
_cogl_shader_free (CoglShader *shader)
{
/* Frees shader resources but its handle is not
released! Do that separately before this! */
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
#ifdef HAVE_COGL_GL
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
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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{
if (shader->gl_handle)
GE (glDeletePrograms (1, &shader->gl_handle));
}
else
#endif
if (shader->gl_handle)
GE (glDeleteShader (shader->gl_handle));
g_slice_free (CoglShader, shader);
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}
CoglHandle
cogl_create_shader (CoglShaderType type)
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{
CoglShader *shader;
GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
switch (type)
{
case COGL_SHADER_TYPE_VERTEX:
case COGL_SHADER_TYPE_FRAGMENT:
break;
default:
g_warning ("Unexpected shader type (0x%08lX) given to "
"cogl_create_shader", (unsigned long) type);
return COGL_INVALID_HANDLE;
}
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shader = g_slice_new (CoglShader);
shader->language = COGL_SHADER_LANGUAGE_GLSL;
shader->gl_handle = 0;
#ifdef HAVE_COGL_GLES2
shader->n_tex_coord_attribs = 0;
#endif
shader->type = type;
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return _cogl_shader_handle_new (shader);
}
static void
delete_shader (CoglShader *shader)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
#ifdef HAVE_COGL_GL
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
{
if (shader->gl_handle)
GE (glDeletePrograms (1, &shader->gl_handle));
}
else
#endif
{
if (shader->gl_handle)
GE (glDeleteShader (shader->gl_handle));
}
shader->gl_handle = 0;
}
void
cogl_shader_source (CoglHandle handle,
const char *source)
{
CoglShader *shader;
CoglShaderLanguage language;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
#ifdef HAVE_COGL_GL
if (strncmp (source, "!!ARBfp1.0", 10) == 0)
language = COGL_SHADER_LANGUAGE_ARBFP;
else
#endif
language = COGL_SHADER_LANGUAGE_GLSL;
/* Delete the old object if the language is changing... */
if (G_UNLIKELY (language != shader->language) &&
shader->gl_handle)
delete_shader (shader);
shader->source = g_strdup (source);
shader->language = language;
}
void
cogl_shader_compile (CoglHandle handle)
{
#ifdef HAVE_COGL_GL
CoglShader *shader = handle;
#endif
if (!cogl_is_shader (handle))
return;
#ifdef HAVE_COGL_GL
_cogl_shader_compile_real (shader, 0 /* ignored */);
#endif
/* XXX: For GLES2 we don't actually compile anything until the
* shader gets used so we have an opportunity to add some
* boilerplate to the shader.
*
* At the end of the day this is obviously a badly designed API
* given that we are having to lie to the user. It was a mistake to
* so thinly wrap the OpenGL shader API and the current plan is to
* replace it with a pipeline snippets API. */
}
void
_cogl_shader_set_source_with_boilerplate (GLuint shader_gl_handle,
GLenum shader_gl_type,
int n_tex_coord_attribs,
GLsizei count_in,
const char **strings_in,
const GLint *lengths_in)
{
static const char vertex_boilerplate[] = _COGL_VERTEX_SHADER_BOILERPLATE;
static const char fragment_boilerplate[] = _COGL_FRAGMENT_SHADER_BOILERPLATE;
const char **strings = g_alloca (sizeof (char *) * (count_in + 2));
GLint *lengths = g_alloca (sizeof (GLint) * (count_in + 2));
int count = 0;
#ifdef HAVE_COGL_GLES2
char *tex_coord_declarations = NULL;
#endif
GET_CONTEXT (ctx, NO_RETVAL);
if (shader_gl_type == GL_VERTEX_SHADER)
{
strings[count] = vertex_boilerplate;
lengths[count++] = sizeof (vertex_boilerplate) - 1;
}
else if (shader_gl_type == GL_FRAGMENT_SHADER)
{
strings[count] = fragment_boilerplate;
lengths[count++] = sizeof (fragment_boilerplate) - 1;
}
#ifdef HAVE_COGL_GLES2
if (n_tex_coord_attribs)
{
GString *declarations = g_string_new (NULL);
g_string_append_printf (declarations,
"varying vec4 _cogl_tex_coord[%d];\n",
n_tex_coord_attribs);
if (shader_gl_type == GL_VERTEX_SHADER)
{
int i;
g_string_append_printf (declarations,
"uniform mat4 cogl_texture_matrix[%d];\n",
n_tex_coord_attribs);
for (i = 0; i < n_tex_coord_attribs; i++)
g_string_append_printf (declarations,
"attribute vec4 cogl_tex_coord%d_in;\n",
i);
}
tex_coord_declarations = g_string_free (declarations, FALSE);
strings[count] = tex_coord_declarations;
lengths[count++] = -1; /* null terminated */
}
#endif
memcpy (strings + count, strings_in, sizeof (char *) * count_in);
if (lengths_in)
memcpy (lengths + count, lengths_in, sizeof (GLint) * count_in);
else
{
int i;
for (i = 0; i < count_in; i++)
lengths[count + i] = -1; /* null terminated */
}
count += count_in;
if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_SHOW_SOURCE))
{
GString *buf = g_string_new (NULL);
int i;
g_string_append_printf (buf,
"%s shader:\n",
shader_gl_type == GL_VERTEX_SHADER ?
"vertex" : "fragment");
for (i = 0; i < count; i++)
if (lengths[i] != -1)
g_string_append_len (buf, strings[i], lengths[i]);
else
g_string_append (buf, strings[i]);
g_message ("%s", buf->str);
g_string_free (buf, TRUE);
}
GE( glShaderSource (shader_gl_handle, count,
(const char **) strings, lengths) );
#ifdef HAVE_COGL_GLES2
g_free (tex_coord_declarations);
#endif
}
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
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void
_cogl_shader_compile_real (CoglHandle handle,
int n_tex_coord_attribs)
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
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{
CoglShader *shader = handle;
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
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
#ifdef HAVE_COGL_GL
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
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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{
#ifdef COGL_GL_DEBUG
GLenum gl_error;
#endif
if (shader->gl_handle)
return;
GE (glGenPrograms (1, &shader->gl_handle));
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
GE (glBindProgram (GL_FRAGMENT_PROGRAM_ARB, shader->gl_handle));
if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_SHOW_SOURCE))
g_message ("user ARBfp program:\n%s", shader->source);
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
#ifdef COGL_GL_DEBUG
while ((gl_error = glGetError ()) != GL_NO_ERROR)
;
#endif
glProgramString (GL_FRAGMENT_PROGRAM_ARB,
GL_PROGRAM_FORMAT_ASCII_ARB,
strlen (shader->source),
shader->source);
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
#ifdef COGL_GL_DEBUG
gl_error = glGetError ();
if (gl_error != GL_NO_ERROR)
{
g_warning ("%s: GL error (%d): Failed to compile ARBfp:\n%s\n%s",
G_STRLOC,
gl_error,
shader->source,
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
glGetString (GL_PROGRAM_ERROR_STRING_ARB));
}
#endif
}
else
#endif
{
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
GLenum gl_type;
if (shader->gl_handle
#ifdef HAVE_COGL_GLES2
&& shader->n_tex_coord_attribs >= n_tex_coord_attribs
#endif
)
return;
if (shader->gl_handle)
delete_shader (shader);
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
switch (shader->type)
{
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
case COGL_SHADER_TYPE_VERTEX:
gl_type = GL_VERTEX_SHADER;
break;
case COGL_SHADER_TYPE_FRAGMENT:
gl_type = GL_FRAGMENT_SHADER;
break;
default:
g_assert_not_reached ();
break;
}
shader->gl_handle = glCreateShader (gl_type);
2008-06-02 06:58:57 -04:00
_cogl_shader_set_source_with_boilerplate (shader->gl_handle,
gl_type,
n_tex_coord_attribs,
1,
(const char **) &shader->source,
NULL);
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
GE (glCompileShader (shader->gl_handle));
#ifdef HAVE_COGL_GLES2
shader->n_tex_coord_attribs = n_tex_coord_attribs;
#endif
#ifdef COGL_GL_DEBUG
if (!cogl_shader_is_compiled (handle))
{
char *log = cogl_shader_get_info_log (handle);
g_warning ("Failed to compile GLSL program:\nsrc:\n%s\nerror:\n%s\n",
shader->source,
log);
}
#endif
}
2008-06-02 06:58:57 -04:00
}
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-09 20:57:32 -05:00
char *
cogl_shader_get_info_log (CoglHandle handle)
2008-06-02 06:58:57 -04:00
{
CoglShader *shader;
GET_CONTEXT (ctx, NULL);
2008-06-02 06:58:57 -04:00
if (!cogl_is_shader (handle))
return NULL;
2008-06-02 06:58:57 -04:00
shader = _cogl_shader_pointer_from_handle (handle);
#ifdef HAVE_COGL_GL
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
{
/* ARBfp exposes a program error string, but since cogl_program
* doesn't have any API to query an error log it is not currently
* exposed. */
return g_strdup ("");
}
else
#endif
{
char buffer[512];
int len = 0;
/* We don't normally compile the shader when the user calls
* cogl_shader_compile() because we want to be able to add
* boilerplate code that depends on how it ends up finally being
* used.
*
* Here we force an early compile if the user is interested in
* log information to increase the chance that the log will be
* useful! We have to guess the number of texture coordinate
* attributes that may be used (normally less than 4) since that
* affects the boilerplate.
*/
if (!shader->gl_handle)
_cogl_shader_compile_real (handle, 4);
glGetShaderInfoLog (shader->gl_handle, 511, &len, buffer);
buffer[len] = '\0';
return g_strdup (buffer);
}
2008-06-02 06:58:57 -04:00
}
CoglShaderType
cogl_shader_get_type (CoglHandle handle)
2008-06-02 06:58:57 -04:00
{
CoglShader *shader;
GET_CONTEXT (ctx, COGL_SHADER_TYPE_VERTEX);
2008-06-02 06:58:57 -04:00
if (!cogl_is_shader (handle))
{
g_warning ("Non shader handle type passed to cogl_shader_get_type");
return COGL_SHADER_TYPE_VERTEX;
}
shader = _cogl_shader_pointer_from_handle (handle);
return shader->type;
}
gboolean
cogl_shader_is_compiled (CoglHandle handle)
{
GLint status;
CoglShader *shader;
GET_CONTEXT (ctx, FALSE);
if (!cogl_is_shader (handle))
return FALSE;
2008-06-02 06:58:57 -04:00
shader = _cogl_shader_pointer_from_handle (handle);
#ifdef HAVE_COGL_GL
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
return TRUE;
else
#endif
{
/* FIXME: We currently have an arbitrary limit of 4 texture
* coordinate attributes since our API means we have to add
* some boilerplate to the users GLSL program (for GLES2)
* before we actually know how many attributes are in use.
*
* 4 will probably be enough (or at least that limitation should
* be enough until we can replace this API with the pipeline
* snippets API) but if it isn't then the shader won't compile,
* through no fault of the user.
*
* To some extent this is just a symptom of bad API design; it
* was a mistake for Cogl to so thinly wrap the OpenGL shader
* API. Eventually we plan for this whole API will be deprecated
* by the pipeline snippets framework.
*/
if (!shader->gl_handle)
_cogl_shader_compile_real (handle, 4);
GE (glGetShaderiv (shader->gl_handle, GL_COMPILE_STATUS, &status));
if (status == GL_TRUE)
return TRUE;
else
return FALSE;
}
2008-06-02 06:58:57 -04:00
}
#else /* HAVE_COGL_GLES */
2008-06-02 06:58:57 -04:00
/* No support on regular OpenGL 1.1 */
CoglHandle
cogl_create_shader (CoglShaderType type)
2008-06-02 06:58:57 -04:00
{
return COGL_INVALID_HANDLE;
}
gboolean
cogl_is_shader (CoglHandle handle)
{
return FALSE;
}
CoglHandle
cogl_shader_ref (CoglHandle handle)
{
return COGL_INVALID_HANDLE;
}
void
cogl_shader_unref (CoglHandle handle)
{
}
void
cogl_shader_source (CoglHandle shader,
const char *source)
2008-06-02 06:58:57 -04:00
{
}
void
cogl_shader_compile (CoglHandle shader_handle)
{
}
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-09 20:57:32 -05:00
char *
cogl_shader_get_info_log (CoglHandle handle)
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{
return NULL;
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}
CoglShaderType
cogl_shader_get_type (CoglHandle handle)
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{
return COGL_SHADER_TYPE_VERTEX;
}
gboolean
cogl_shader_is_compiled (CoglHandle handle)
{
return FALSE;
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}
#endif /* HAVE_COGL_GLES */