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mutter/cogl/cogl-pipeline-vertend-fixed.c

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cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
/*
* 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:
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
cogl-pipeline/cogl-pango: Added forgotten includes It seems that cogl-context-private.h needs to be included before including any of the pipeline-related stuff to avoid build errors on C89 compilers. This is due to the recent cogl-pipeline decoupling, seems like. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-09-23 04:43:05 -04:00
#include "cogl-context-private.h"
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
#include "cogl-pipeline-private.h"
cogl-pipeline: Add two hook points for adding shader snippets This adds two new public experimental functions for attaching CoglSnippets to two hook points on a CoglPipeline: void cogl_pipeline_add_vertex_hook (CoglPipeline *, CoglSnippet *) void cogl_pipeline_add_fragment_hook (CoglPipeline *, CoglSnippet *) The hooks are intended to be around the entire vertex or fragment processing. That means the pre string in the snippet will be inserted at the very top of the main function and the post function will be inserted at the very end. The declarations get inserted in the global scope. The snippets are stored in two separate linked lists with a structure containing an enum representing the hook point and a pointer to the snippet. The lists are meant to be for hooks that affect the vertex shader and fragment shader respectively. Although there are currently only two hooks and the names match these two lists, the intention is *not* that each new hook will be in a separate list. The separation of the lists is just to make it easier to determine which shader needs to be regenerated when a new snippet is added. When a pipeline becomes the authority for either the vertex or fragment snipper state, it simply copies the entire list from the previous authority (although of course the shader snippet objects are referenced instead of copied so it doesn't duplicate the source strings). Each string is inserted into its own block in the shader. This means that each string has its own scope so it doesn't need to worry about name collisions with variables in other snippets. However it does mean that the pre and post strings can't share variables. It could be possible to wrap both parts in one block and then wrap the actual inner hook code in another block, however this would mean that any further snippets within the outer snippet would be able to see those variables. Perhaps something to consider would be to put each snippet into its own function which calls another function between the pre and post strings to do further processing. The pipeline cache for generated programs was previously shared with the fragment shader cache because the state that affects vertex shaders was a subset of the state that affects fragment shaders. This is no longer the case because there is a separate state mask for vertex snippets so the program cache now has its own hash table. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-17 11:52:21 -05:00
#include "cogl-pipeline-state-private.h"
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
#include "cogl-pipeline-opengl-private.h"
#ifdef COGL_PIPELINE_VERTEND_FIXED
#include "cogl.h"
#include "cogl-internal.h"
cogl: rename cogl-context.h cogl-context-private.h Since we plan to add public cogl_context_* API we need to rename the current cogl-context.h which contains private member details.
2010-11-04 18:25:52 -04:00
#include "cogl-context-private.h"
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
#include "cogl-handle.h"
cogl: Add a vertend to generate GLSL The GLSL vertend is mostly only useful for GLES2. The fixed function vertend is kept at higher priority than the GLSL vertend so it is unlikely to be used in any other circumstances.
2010-12-02 15:48:45 -05:00
#include "cogl-program-private.h"
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
const CoglPipelineVertend _cogl_pipeline_fixed_vertend;
static gboolean
_cogl_pipeline_vertend_fixed_start (CoglPipeline *pipeline,
int n_layers,
Use the same number for n_tex_coord_attribs in all linked shaders On GLES2, we need to specify an array size for the texture coord varying array. Previously this size would be decided in one of the following ways: - For generated vertex shaders it is always the number of layers in the pipeline. - For generated fragment shaders it is the highest sampled texture unit in the pipeline or the number of attributes supplied by the primitive, whichever is higher. - For user shaders it is usually the number of attributes supplied by the primitive. However, if the application tries to compile the shader and query the result before using it, it will always be at least 4. These shaders can quite easily end up with different values for the declaration which makes it fail to link. This patch changes it so that all of the shaders are generated with the maximum of the number of texture attributes supplied by the primitive and the number of layers in the pipeline. If this value changes then the shaders are regenerated, including user shaders. That way all of the shaders will always have the same value. https://bugzilla.gnome.org/show_bug.cgi?id=662184 Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-10-19 07:47:22 -04:00
unsigned long pipelines_difference,
int n_tex_coord_attribs)
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
{
cogl: Add a vertend to generate GLSL The GLSL vertend is mostly only useful for GLES2. The fixed function vertend is kept at higher priority than the GLSL vertend so it is unlikely to be used in any other circumstances.
2010-12-02 15:48:45 -05:00
CoglProgram *user_program;
Dynamically load the GL or GLES library The GL or GLES library is now dynamically loaded by the CoglRenderer so that it can choose between GL, GLES1 and GLES2 at runtime. The library is loaded by the renderer because it needs to be done before calling eglInitialize. There is a new environment variable called COGL_DRIVER to choose between gl, gles1 or gles2. The #ifdefs for HAVE_COGL_GL, HAVE_COGL_GLES and HAVE_COGL_GLES2 have been changed so that they don't assume the ifdefs are mutually exclusive. They haven't been removed entirely so that it's possible to compile the GLES backends without the the enums from the GL headers. When using GLX the winsys additionally dynamically loads libGL because that also contains the GLX API. It can't be linked in directly because that would probably conflict with the GLES API if the EGL is selected. When compiling with EGL support the library links directly to libEGL because it doesn't contain any GL API so it shouldn't have any conflicts. When building for WGL or OSX Cogl still directly links against the GL API so there is a #define in config.h so that Cogl won't try to dlopen the library. Cogl-pango previously had a #ifdef to detect when the GL backend is used so that it can sneakily pass GL_QUADS to cogl_vertex_buffer_draw. This is now changed so that it queries the CoglContext for the backend. However to get this to work Cogl now needs to export the _cogl_context_get_default symbol and cogl-pango needs some extra -I flags to so that it can include cogl-context-private.h
2011-07-07 15:44:56 -04:00
_COGL_GET_CONTEXT (ctx, FALSE);
cogl-debug: Split the flags to support more than 32 The CoglDebugFlags are now stored in an array of unsigned ints rather than a single variable. The flags are accessed using macros instead of directly peeking at the cogl_debug_flags variable. The index values are stored in the enum rather than the actual mask values so that the enum doesn't need to be more than 32 bits wide. The hope is that the code to determine the index into the array can be optimized out by the compiler so it should have exactly the same performance as the old code.
2011-01-24 09:28:00 -05:00
if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_FIXED)))
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
return FALSE;
Dynamically load the GL or GLES library The GL or GLES library is now dynamically loaded by the CoglRenderer so that it can choose between GL, GLES1 and GLES2 at runtime. The library is loaded by the renderer because it needs to be done before calling eglInitialize. There is a new environment variable called COGL_DRIVER to choose between gl, gles1 or gles2. The #ifdefs for HAVE_COGL_GL, HAVE_COGL_GLES and HAVE_COGL_GLES2 have been changed so that they don't assume the ifdefs are mutually exclusive. They haven't been removed entirely so that it's possible to compile the GLES backends without the the enums from the GL headers. When using GLX the winsys additionally dynamically loads libGL because that also contains the GLX API. It can't be linked in directly because that would probably conflict with the GLES API if the EGL is selected. When compiling with EGL support the library links directly to libEGL because it doesn't contain any GL API so it shouldn't have any conflicts. When building for WGL or OSX Cogl still directly links against the GL API so there is a #define in config.h so that Cogl won't try to dlopen the library. Cogl-pango previously had a #ifdef to detect when the GL backend is used so that it can sneakily pass GL_QUADS to cogl_vertex_buffer_draw. This is now changed so that it queries the CoglContext for the backend. However to get this to work Cogl now needs to export the _cogl_context_get_default symbol and cogl-pango needs some extra -I flags to so that it can include cogl-context-private.h
2011-07-07 15:44:56 -04:00
if (ctx->driver == COGL_DRIVER_GLES2)
return FALSE;
cogl-pipeline: Add two hook points for adding shader snippets This adds two new public experimental functions for attaching CoglSnippets to two hook points on a CoglPipeline: void cogl_pipeline_add_vertex_hook (CoglPipeline *, CoglSnippet *) void cogl_pipeline_add_fragment_hook (CoglPipeline *, CoglSnippet *) The hooks are intended to be around the entire vertex or fragment processing. That means the pre string in the snippet will be inserted at the very top of the main function and the post function will be inserted at the very end. The declarations get inserted in the global scope. The snippets are stored in two separate linked lists with a structure containing an enum representing the hook point and a pointer to the snippet. The lists are meant to be for hooks that affect the vertex shader and fragment shader respectively. Although there are currently only two hooks and the names match these two lists, the intention is *not* that each new hook will be in a separate list. The separation of the lists is just to make it easier to determine which shader needs to be regenerated when a new snippet is added. When a pipeline becomes the authority for either the vertex or fragment snipper state, it simply copies the entire list from the previous authority (although of course the shader snippet objects are referenced instead of copied so it doesn't duplicate the source strings). Each string is inserted into its own block in the shader. This means that each string has its own scope so it doesn't need to worry about name collisions with variables in other snippets. However it does mean that the pre and post strings can't share variables. It could be possible to wrap both parts in one block and then wrap the actual inner hook code in another block, however this would mean that any further snippets within the outer snippet would be able to see those variables. Perhaps something to consider would be to put each snippet into its own function which calls another function between the pre and post strings to do further processing. The pipeline cache for generated programs was previously shared with the fragment shader cache because the state that affects vertex shaders was a subset of the state that affects fragment shaders. This is no longer the case because there is a separate state mask for vertex snippets so the program cache now has its own hash table. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-17 11:52:21 -05:00
/* Vertex snippets are only supported in the GLSL fragend */
if (_cogl_pipeline_has_vertex_snippets (pipeline))
return FALSE;
cogl: Add a vertend to generate GLSL The GLSL vertend is mostly only useful for GLES2. The fixed function vertend is kept at higher priority than the GLSL vertend so it is unlikely to be used in any other circumstances.
2010-12-02 15:48:45 -05:00
/* If there is a user program with a vertex shader then the
appropriate backend for that language should handle it. We can
still use the fixed vertex backend if the program only contains
a fragment shader */
user_program = cogl_pipeline_get_user_program (pipeline);
if (user_program != COGL_INVALID_HANDLE &&
_cogl_program_has_vertex_shader (user_program))
return FALSE;
_cogl_use_vertex_program (0, COGL_PIPELINE_PROGRAM_TYPE_FIXED);
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
return TRUE;
}
static gboolean
_cogl_pipeline_vertend_fixed_add_layer (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
unsigned long layers_difference)
{
int unit_index = _cogl_pipeline_layer_get_unit_index (layer);
CoglTextureUnit *unit = _cogl_get_texture_unit (unit_index);
matrix-stack: Avoid referencing the default CoglContext This removes the use of _COGL_GET_CONTEXT() from cogl-matrix-stack.c as part of the ongoing effort to evolve cogl to get rid of the need for a default context. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-11-21 09:22:01 -05:00
_COGL_GET_CONTEXT (ctx, FALSE);
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
if (layers_difference & COGL_PIPELINE_LAYER_STATE_USER_MATRIX)
{
CoglPipelineLayerState state = COGL_PIPELINE_LAYER_STATE_USER_MATRIX;
CoglPipelineLayer *authority =
_cogl_pipeline_layer_get_authority (layer, state);
_cogl_matrix_stack_set (unit->matrix_stack,
&authority->big_state->matrix);
cogl: Set the layer matrix on the right layer instead of a random one When uploading the layer matrix to GL it wasn't first calling glActiveTextureMatrix to set the right texture unit for the layer. This would end up setting the texture matrix on whatever layer happened to be previously active. This happened to work for test-cogl-multitexture presumably because it was coincidentally setting the layer matrix on the last used layer.
2011-02-09 10:24:43 -05:00
_cogl_set_active_texture_unit (unit_index);
Flush matrices in the progend and flip with a vector Previously flushing the matrices was performed as part of the framebuffer state. When on GLES2 this matrix flushing is actually diverted so that it only keeps a reference to the intended matrix stack. This is necessary because on GLES2 there are no builtin uniforms so it can't actually flush the matrices until the program for the pipeline is generated. When the matrices are flushed it would store the age of modifications on the matrix stack so that it could detect when the matrix hasn't changed and avoid flushing it. This patch changes it so that the pipeline is responsible for flushing the matrices even when we are using the GL builtins. The same mechanism for detecting unmodified matrix stacks is used in all cases. There is a new CoglMatrixStackCache type which is used to store a reference to the intended matrix stack along with its last flushed age. There are now two of these attached to the CoglContext to track the flushed state for the global matrix builtins and also two for each glsl progend program state to track the flushed state for a program. The framebuffer matrix flush now just updates the intended matrix stacks without actually trying to flush. When a vertex snippet is attached to the pipeline, the GLSL vertend will now avoid using the projection matrix to flip the rendering. This is necessary because any vertex snippet may cause the projection matrix not to be used. Instead the flip is done as a forced final step by multiplying cogl_position_out by a vec4 uniform. This uniform is updated as part of the progend pre_paint depending on whether the framebuffer is offscreen or not. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-29 09:21:07 -05:00
_cogl_matrix_stack_flush_to_gl_builtins (ctx, unit->matrix_stack,
COGL_MATRIX_TEXTURE,
FALSE /* enable flip */);
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
}
return TRUE;
}
static gboolean
_cogl_pipeline_vertend_fixed_end (CoglPipeline *pipeline,
unsigned long pipelines_difference)
{
cogl: Add a vertend to generate GLSL The GLSL vertend is mostly only useful for GLES2. The fixed function vertend is kept at higher priority than the GLSL vertend so it is unlikely to be used in any other circumstances.
2010-12-02 15:48:45 -05:00
_COGL_GET_CONTEXT (ctx, FALSE);
if (pipelines_difference & COGL_PIPELINE_STATE_POINT_SIZE)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_POINT_SIZE);
if (ctx->point_size_cache != authority->big_state->point_size)
{
Use all core GL functions through indirect pointers cogl-ext-functions.h now contains definitions for all of the core GL and GLES functions that we would normally link to directly. All of the code has changed to access them through the cogl context pointer. The GE macro now takes an extra parameter to specify the context because the macro itself needs to make GL calls but various points in the Cogl source use different names for the context variable.
2011-07-06 16:51:00 -04:00
GE( ctx, glPointSize (authority->big_state->point_size) );
cogl: Add a vertend to generate GLSL The GLSL vertend is mostly only useful for GLES2. The fixed function vertend is kept at higher priority than the GLSL vertend so it is unlikely to be used in any other circumstances.
2010-12-02 15:48:45 -05:00
ctx->point_size_cache = authority->big_state->point_size;
}
}
cogl: Add a fixed function vertend The vertends are intended to flush state that would be represented in a vertex program. Code to handle the layer matrix, lighting and point size has now been moved from the common cogl-pipeline-opengl backend to the fixed vertend.
2010-11-29 13:32:21 -05:00
return TRUE;
}
const CoglPipelineVertend _cogl_pipeline_fixed_vertend =
{
_cogl_pipeline_vertend_fixed_start,
_cogl_pipeline_vertend_fixed_add_layer,
_cogl_pipeline_vertend_fixed_end,
NULL, /* pipeline_change_notify */
NULL /* layer_change_notify */
};
#endif /* COGL_PIPELINE_VERTEND_FIXED */
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