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mutter/cogl/driver/gl/cogl-pipeline-vertend-glsl.c

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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 20:48:45 +00:00
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
Add fragment and vertex snippet hooks for global declarations This adds hook points to add global function and variable declarations to either the fragment or vertex shader. The declarations can then be used by subsequent snippets. Only the ‘declarations’ string of the snippet is used and the code is directly put in the global scope near the top of the shader. The reason this is necessary rather than just adding a normal snippet with the declarations is that for the other hooks Cogl assumes that the snippets are independent of each other. That means if a snippet has a replace string then it will assume that it doesn't even need to generate the code for earlier hooks which means the global declarations would be lost. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit ebb82d5b0bc30487b7101dc66b769160b40f92ca)
2013-02-26 17:52:20 +00:00
* Copyright (C) 2010,2013 Intel Corporation.
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 20:48:45 +00:00
*
* 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
pipeline: Move the snippet source loop into a common function The two loops that generate the functions for the snippets in the fragend and vertend are very similar so to avoid code duplication this patch moves the logic to its own function in a new cogl-pipeline-snippet.c file. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-25 15:31:21 +00:00
#include <string.h>
Don't generate GLSL for the point size for default pipelines Previously on GLES2 where there is no builtin point size uniform then we would always add a line to the vertex shader to write to the builtin point size output because when generating the shader it is not possible to determine if the pipeline will be used to draw points or not. This patch changes it so that the default point size is 0.0f which is documented to have undefined results when drawing points. That way we can avoid adding the point size code to the shader in that case. The assumption is that any application that is drawing points will probably have explicitly set the point size on the pipeline anyway so it is not a big deal to change the default size from 1.0f. This adds a new pipeline state flag to track whether the point size is non-zero. This needs to be its own state because altering it needs to cause a different shader to be added to the pipeline cache. The state flags that affect the vertex shader have been changed from a constant to a runtime function because they will be different depending on whether there is a builtin point size uniform. There is also a unit test to ensure that changing the point size does or doesn't generate a new shader depending on the values. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit b2eba06e16b587acbf5c57944a70ceccecb4f175) Conflicts: cogl/cogl-pipeline-private.h cogl/cogl-pipeline-state-private.h cogl/cogl-pipeline-state.c cogl/cogl-pipeline.c
2013-06-20 12:25:49 +00:00
#include <test-fixtures/test-unit.h>
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 08:43:05 +00:00
#include "cogl-context-private.h"
Remove cogl-internal.h This remove cogl-internal.h in favour of using cogl-private.h. Some things in cogl-internal.h were moved to driver/gl/cogl-util-gl-private.h and the _cogl_gl_error_to_string function whose prototype was moved from cogl-internal.h to cogl-util-gl-private.h has had its implementation moved from cogl.c to cogl-util-gl.c Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 01cc82ece091aa3bec4c07fdd6bc9e5135fca573)
2013-01-20 18:47:40 +00:00
#include "cogl-util-gl-private.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 20:48:45 +00:00
#include "cogl-pipeline-private.h"
#include "cogl-pipeline-opengl-private.h"
#ifdef COGL_PIPELINE_VERTEND_GLSL
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 22:25:52 +00:00
#include "cogl-context-private.h"
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
#include "cogl-object-private.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 20:48:45 +00:00
#include "cogl-program-private.h"
#include "cogl-pipeline-vertend-glsl-private.h"
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 14:21:07 +00:00
#include "cogl-pipeline-state-private.h"
add cogl-glsl-shader files to aid backporting patches To aid with backporting patches from master made after the deprecated CoglShader api was removed this patch adds the cogl-glsl- files that have been added on master so we should get less conflicts when cherry picking.
2013-01-07 19:16:11 +00:00
#include "cogl-glsl-shader-private.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 20:48:45 +00:00
const CoglPipelineVertend _cogl_pipeline_glsl_vertend;
typedef struct
{
unsigned int ref_count;
GLuint gl_shader;
GString *header, *source;
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
} CoglPipelineShaderState;
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
static CoglUserDataKey shader_state_key;
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
static CoglPipelineShaderState *
shader_state_new (void)
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 20:48:45 +00:00
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
CoglPipelineShaderState *shader_state;
shader_state = g_slice_new0 (CoglPipelineShaderState);
shader_state->ref_count = 1;
return shader_state;
}
static CoglPipelineShaderState *
get_shader_state (CoglPipeline *pipeline)
{
return cogl_object_get_user_data (COGL_OBJECT (pipeline), &shader_state_key);
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 20:48:45 +00:00
}
static void
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
destroy_shader_state (void *user_data)
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 20:48:45 +00:00
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
CoglPipelineShaderState *shader_state = user_data;
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 20:48:45 +00:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
if (--shader_state->ref_count == 0)
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 20:48:45 +00:00
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
if (shader_state->gl_shader)
GE( ctx, glDeleteShader (shader_state->gl_shader) );
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
g_slice_free (CoglPipelineShaderState, shader_state);
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 20:48:45 +00:00
}
}
static void
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
set_shader_state (CoglPipeline *pipeline,
CoglPipelineShaderState *shader_state)
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 20:48:45 +00:00
{
cogl_object_set_user_data (COGL_OBJECT (pipeline),
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
&shader_state_key,
shader_state,
destroy_shader_state);
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 20:48:45 +00:00
}
static void
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
dirty_shader_state (CoglPipeline *pipeline)
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 20:48:45 +00:00
{
cogl_object_set_user_data (COGL_OBJECT (pipeline),
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
&shader_state_key,
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 20:48:45 +00:00
NULL,
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
NULL);
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 20:48:45 +00:00
}
GLuint
_cogl_pipeline_vertend_glsl_get_shader (CoglPipeline *pipeline)
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
CoglPipelineShaderState *shader_state = get_shader_state (pipeline);
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
if (shader_state)
return shader_state->gl_shader;
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 20:48:45 +00:00
else
return 0;
}
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 16:52:21 +00:00
static CoglPipelineSnippetList *
get_vertex_snippets (CoglPipeline *pipeline)
{
pipeline =
_cogl_pipeline_get_authority (pipeline,
COGL_PIPELINE_STATE_VERTEX_SNIPPETS);
return &pipeline->big_state->vertex_snippets;
}
snippet: Add a hook for the layer texture coordinate transformation This adds a hook called COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM. This can be used to alter the application of the layer user matrix to a texture coordinate or it can bypass it altogether. This is the first per-layer hook that affects the vertex shader state so the patch includes the boilerplate needed to get that to work. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 19:58:15 +00:00
static CoglPipelineSnippetList *
get_layer_vertex_snippets (CoglPipelineLayer *layer)
{
unsigned long state = COGL_PIPELINE_LAYER_STATE_VERTEX_SNIPPETS;
layer = _cogl_pipeline_layer_get_authority (layer, state);
return &layer->big_state->vertex_snippets;
}
Add the layer's sampler and uniform declarations at the start Previously the sampler uniform declarations such as cogl_sampler0 were generated by walking the list of layers in the shader state. This had two problems. Firstly it would only generate the declarations for layers that have been referenced. If a layer has a combine mode of replace then the samplers from previous layers couldn't be used by custom snippets. Secondly it meant that the samplers couldn't be referenced by functions in the declarations sections because the samplers are declared too late. This patch fixes it to generate the layer declarations in the backend start function using all of the layers on the pipeline instead. In addition it adds the sampler declarations to the vertex shader as they were previously missing. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 1824df902bbb9995cae6ffb7a413913f2df35eef) Conflicts: cogl/driver/gl/cogl-pipeline-fragend-glsl.c cogl/driver/gl/cogl-pipeline-vertend-glsl.c
2013-02-26 18:29:36 +00:00
static CoglBool
add_layer_declaration_cb (CoglPipelineLayer *layer,
void *user_data)
{
CoglPipelineShaderState *shader_state = user_data;
CoglTextureType texture_type =
_cogl_pipeline_layer_get_texture_type (layer);
const char *target_string;
_cogl_gl_util_get_texture_target_string (texture_type, &target_string, NULL);
g_string_append_printf (shader_state->header,
"uniform sampler%s cogl_sampler%i;\n",
target_string,
layer->index);
return TRUE;
}
static void
add_layer_declarations (CoglPipeline *pipeline,
CoglPipelineShaderState *shader_state)
{
/* We always emit sampler uniforms in case there will be custom
* layer snippets that want to sample arbitrary layers. */
_cogl_pipeline_foreach_layer_internal (pipeline,
add_layer_declaration_cb,
shader_state);
}
Add fragment and vertex snippet hooks for global declarations This adds hook points to add global function and variable declarations to either the fragment or vertex shader. The declarations can then be used by subsequent snippets. Only the ‘declarations’ string of the snippet is used and the code is directly put in the global scope near the top of the shader. The reason this is necessary rather than just adding a normal snippet with the declarations is that for the other hooks Cogl assumes that the snippets are independent of each other. That means if a snippet has a replace string then it will assume that it doesn't even need to generate the code for earlier hooks which means the global declarations would be lost. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit ebb82d5b0bc30487b7101dc66b769160b40f92ca)
2013-02-26 17:52:20 +00:00
static void
add_global_declarations (CoglPipeline *pipeline,
CoglPipelineShaderState *shader_state)
{
CoglSnippetHook hook = COGL_SNIPPET_HOOK_VERTEX_GLOBALS;
CoglPipelineSnippetList *snippets = get_vertex_snippets (pipeline);
/* Add the global data hooks. All of the code in these snippets is
* always added and only the declarations data is used */
_cogl_pipeline_snippet_generate_declarations (shader_state->header,
hook,
snippets);
}
Clearly define 3 progends that own the frag+vertends This adds a new "fixed-arbfp" progend so we now have 3 distinct ways of setting up the state of a pipeline: » fixed; where the vertex and fragment processing are implemented using fixed function opengl apis. » fixed-arbfp; where vertex processing is implemented using fixed function opengl apis but fragment processing is implemented using the ARB Fragment Processing language. » glsl; there vertex and fragment processing are both implemented using glsl. This means we avoid unusual, combinations such as glsl for vertex processing and arbfp for fragment processing, and also avoid pairing fixed-function vertex processing with glsl fragment processing which we happen to know hits some awkward code paths in Mesa that lead to poor performance. As part of this change, the progend now implies specific vertend and fragend choices so instead of associating a vertend and fragend with a pipeline we now just associate a progend choice. When flushing a pipeline and choosing what progend to use, we now call a progend->start() method that is able to determine if the vertend and fragend together will be able to handle the given pipeline so the vertend and fragend ->start() methods no longer need to return a boolean status. Since we now don't need to support glsl used in conjunction with fixed function this will allow us to avoid ever using OpenGL builtin attribute names, though this patch doesn't change that yet. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit cec381f50c7a2f2186bd4a8c5f38fecd5f099075)
2012-09-25 20:08:10 +00:00
static void
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 20:48:45 +00:00
_cogl_pipeline_vertend_glsl_start (CoglPipeline *pipeline,
int n_layers,
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
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 20:48:45 +00:00
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
CoglPipelineShaderState *shader_state;
cogl-pipeline: Use the pipeline cache for the GLSL backends The CoglPipelineCache is now extended to store templates for state affecting vertex shaders and combined programs. The GLSL fragend, vertend and progend now uses this to get cached shaders and a program. When a new pipeline is created it will now get hashed three times if the GLSL backends are in use (once for the fragend, once for the vertend and once for the progend). Ideally we should add some way for the progend to check its cache before the fragends and vertends are checked so that it can bypass them entirely if it can find a cached combined program.
2011-06-30 17:34:05 +00:00
CoglPipeline *template_pipeline = NULL;
Clearly define 3 progends that own the frag+vertends This adds a new "fixed-arbfp" progend so we now have 3 distinct ways of setting up the state of a pipeline: » fixed; where the vertex and fragment processing are implemented using fixed function opengl apis. » fixed-arbfp; where vertex processing is implemented using fixed function opengl apis but fragment processing is implemented using the ARB Fragment Processing language. » glsl; there vertex and fragment processing are both implemented using glsl. This means we avoid unusual, combinations such as glsl for vertex processing and arbfp for fragment processing, and also avoid pairing fixed-function vertex processing with glsl fragment processing which we happen to know hits some awkward code paths in Mesa that lead to poor performance. As part of this change, the progend now implies specific vertend and fragend choices so instead of associating a vertend and fragend with a pipeline we now just associate a progend choice. When flushing a pipeline and choosing what progend to use, we now call a progend->start() method that is able to determine if the vertend and fragend together will be able to handle the given pipeline so the vertend and fragend ->start() methods no longer need to return a boolean status. Since we now don't need to support glsl used in conjunction with fixed function this will allow us to avoid ever using OpenGL builtin attribute names, though this patch doesn't change that yet. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit cec381f50c7a2f2186bd4a8c5f38fecd5f099075)
2012-09-25 20:08:10 +00:00
CoglProgram *user_program = cogl_pipeline_get_user_program (pipeline);
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 20:48:45 +00:00
Clearly define 3 progends that own the frag+vertends This adds a new "fixed-arbfp" progend so we now have 3 distinct ways of setting up the state of a pipeline: » fixed; where the vertex and fragment processing are implemented using fixed function opengl apis. » fixed-arbfp; where vertex processing is implemented using fixed function opengl apis but fragment processing is implemented using the ARB Fragment Processing language. » glsl; there vertex and fragment processing are both implemented using glsl. This means we avoid unusual, combinations such as glsl for vertex processing and arbfp for fragment processing, and also avoid pairing fixed-function vertex processing with glsl fragment processing which we happen to know hits some awkward code paths in Mesa that lead to poor performance. As part of this change, the progend now implies specific vertend and fragend choices so instead of associating a vertend and fragend with a pipeline we now just associate a progend choice. When flushing a pipeline and choosing what progend to use, we now call a progend->start() method that is able to determine if the vertend and fragend together will be able to handle the given pipeline so the vertend and fragend ->start() methods no longer need to return a boolean status. Since we now don't need to support glsl used in conjunction with fixed function this will allow us to avoid ever using OpenGL builtin attribute names, though this patch doesn't change that yet. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit cec381f50c7a2f2186bd4a8c5f38fecd5f099075)
2012-09-25 20:08:10 +00:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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 20:48:45 +00:00
/* Now lookup our glsl backend private state (allocating if
* necessary) */
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
shader_state = get_shader_state (pipeline);
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
if (shader_state == NULL)
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 20:48:45 +00:00
{
CoglPipeline *authority;
/* Get the authority for anything affecting vertex shader
state */
authority = _cogl_pipeline_find_equivalent_parent
(pipeline,
Don't generate GLSL for the point size for default pipelines Previously on GLES2 where there is no builtin point size uniform then we would always add a line to the vertex shader to write to the builtin point size output because when generating the shader it is not possible to determine if the pipeline will be used to draw points or not. This patch changes it so that the default point size is 0.0f which is documented to have undefined results when drawing points. That way we can avoid adding the point size code to the shader in that case. The assumption is that any application that is drawing points will probably have explicitly set the point size on the pipeline anyway so it is not a big deal to change the default size from 1.0f. This adds a new pipeline state flag to track whether the point size is non-zero. This needs to be its own state because altering it needs to cause a different shader to be added to the pipeline cache. The state flags that affect the vertex shader have been changed from a constant to a runtime function because they will be different depending on whether there is a builtin point size uniform. There is also a unit test to ensure that changing the point size does or doesn't generate a new shader depending on the values. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit b2eba06e16b587acbf5c57944a70ceccecb4f175) Conflicts: cogl/cogl-pipeline-private.h cogl/cogl-pipeline-state-private.h cogl/cogl-pipeline-state.c cogl/cogl-pipeline.c
2013-06-20 12:25:49 +00:00
_cogl_pipeline_get_state_for_vertex_codegen (ctx) &
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 20:48:45 +00:00
~COGL_PIPELINE_STATE_LAYERS,
pipeline: differentiate texture target and data state There are several places where we need to compare the texture state of a pipeline and sometimes we need to take into consideration if the underlying texture has changed but other times we may only care to know if the texture target has changed. For example the fragends typically generate programs that they want to share with all pipelines with equivalent fragment processing state, and in this case when comparing pipelines we only care about the texture targets since changes to the underlying texture won't affect the programs generated. Prior to this we had tried to handle this by passing around some special flags to various functions that evaluate pipeline state to say when we do/don't care about the texture data, but this wasn't working in all cases and was more awkward to manage than the new approach. Now we simply have two state bits: COGL_PIPELINE_LAYER_STATE_TEXTURE_TARGET and COGL_PIPELINE_LAYER_STATE_TEXTURE_DATA and CoglPipelineLayer has an additional target member. Since all the appropriate code takes masks of these state bits to determine what to evaluate we don't need any extra magic flags.
2011-01-11 16:02:06 +00:00
COGL_PIPELINE_LAYER_STATE_AFFECTS_VERTEX_CODEGEN);
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
shader_state = get_shader_state (authority);
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
if (shader_state == NULL)
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 20:48:45 +00:00
{
cogl-pipeline: Use the pipeline cache for the GLSL backends The CoglPipelineCache is now extended to store templates for state affecting vertex shaders and combined programs. The GLSL fragend, vertend and progend now uses this to get cached shaders and a program. When a new pipeline is created it will now get hashed three times if the GLSL backends are in use (once for the fragend, once for the vertend and once for the progend). Ideally we should add some way for the progend to check its cache before the fragends and vertends are checked so that it can bypass them entirely if it can find a cached combined program.
2011-06-30 17:34:05 +00:00
/* Check if there is already a similar cached pipeline whose
shader state we can share */
if (G_LIKELY (!(COGL_DEBUG_ENABLED
(COGL_DEBUG_DISABLE_PROGRAM_CACHES))))
{
template_pipeline =
_cogl_pipeline_cache_get_vertex_template (ctx->pipeline_cache,
authority);
shader_state = get_shader_state (template_pipeline);
}
if (shader_state)
shader_state->ref_count++;
else
shader_state = shader_state_new ();
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
set_shader_state (authority, shader_state);
cogl-pipeline: Use the pipeline cache for the GLSL backends The CoglPipelineCache is now extended to store templates for state affecting vertex shaders and combined programs. The GLSL fragend, vertend and progend now uses this to get cached shaders and a program. When a new pipeline is created it will now get hashed three times if the GLSL backends are in use (once for the fragend, once for the vertend and once for the progend). Ideally we should add some way for the progend to check its cache before the fragends and vertends are checked so that it can bypass them entirely if it can find a cached combined program.
2011-06-30 17:34:05 +00:00
if (template_pipeline)
{
shader_state->ref_count++;
set_shader_state (template_pipeline, shader_state);
}
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 20:48:45 +00:00
}
if (authority != pipeline)
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
shader_state->ref_count++;
set_shader_state (pipeline, shader_state);
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 20:48:45 +00:00
}
}
if (user_program)
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
{
/* If the user program contains a vertex shader then we don't need
to generate one */
if (_cogl_program_has_vertex_shader (user_program))
Adds back tex_coord array for CoglShader compatibility This adds back compatibility for CoglShaders that reference the cogl_tex_coord_in[] or cogl_tex_coord_out[] varyings. Unlike the previous way this was done this patch maintains the use of layer numbers for attributes and maintains forwards compatibility by letting shaders alternatively access the per-layer tex_coord varyings via cogl_tex_coord%i_in/out defines that index into the array.
2013-01-19 16:00:33 +00:00
{
if (shader_state->gl_shader)
{
GE( ctx, glDeleteShader (shader_state->gl_shader) );
shader_state->gl_shader = 0;
}
return;
}
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
}
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 20:48:45 +00:00
Adds back tex_coord array for CoglShader compatibility This adds back compatibility for CoglShaders that reference the cogl_tex_coord_in[] or cogl_tex_coord_out[] varyings. Unlike the previous way this was done this patch maintains the use of layer numbers for attributes and maintains forwards compatibility by letting shaders alternatively access the per-layer tex_coord varyings via cogl_tex_coord%i_in/out defines that index into the array.
2013-01-19 16:00:33 +00:00
if (shader_state->gl_shader)
return;
/* If we make it here then we have a 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 */
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 20:48:45 +00:00
/* 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);
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
shader_state->header = ctx->codegen_header_buffer;
shader_state->source = ctx->codegen_source_buffer;
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 20:48:45 +00:00
Add the layer's sampler and uniform declarations at the start Previously the sampler uniform declarations such as cogl_sampler0 were generated by walking the list of layers in the shader state. This had two problems. Firstly it would only generate the declarations for layers that have been referenced. If a layer has a combine mode of replace then the samplers from previous layers couldn't be used by custom snippets. Secondly it meant that the samplers couldn't be referenced by functions in the declarations sections because the samplers are declared too late. This patch fixes it to generate the layer declarations in the backend start function using all of the layers on the pipeline instead. In addition it adds the sampler declarations to the vertex shader as they were previously missing. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 1824df902bbb9995cae6ffb7a413913f2df35eef) Conflicts: cogl/driver/gl/cogl-pipeline-fragend-glsl.c cogl/driver/gl/cogl-pipeline-vertend-glsl.c
2013-02-26 18:29:36 +00:00
add_layer_declarations (pipeline, shader_state);
Add fragment and vertex snippet hooks for global declarations This adds hook points to add global function and variable declarations to either the fragment or vertex shader. The declarations can then be used by subsequent snippets. Only the ‘declarations’ string of the snippet is used and the code is directly put in the global scope near the top of the shader. The reason this is necessary rather than just adding a normal snippet with the declarations is that for the other hooks Cogl assumes that the snippets are independent of each other. That means if a snippet has a replace string then it will assume that it doesn't even need to generate the code for earlier hooks which means the global declarations would be lost. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit ebb82d5b0bc30487b7101dc66b769160b40f92ca)
2013-02-26 17:52:20 +00:00
add_global_declarations (pipeline, shader_state);
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
g_string_append (shader_state->source,
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 20:48:45 +00:00
"void\n"
pipeline: Wrap each snippet in its own function Each snippet is now given its own function which contains the pre and post strings. Between these strings the function will chain on to another function. The generated cogl source is now stored in a function called cogl_generated_source() which the last snippet will chain on to. This should make it so that each snippet has its own namespace for local variables and it can share variables declared in the pre string in the post string. Hopefully the GLSL compiler will just inline all of the functions so it shouldn't make much difference to the compiled output. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-25 13:41:13 +00:00
"cogl_generated_source ()\n"
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 20:48:45 +00:00
"{\n");
Add support for per-vertex point sizes This adds a new function to enable per-vertex point size on a pipeline. This can be set with cogl_pipeline_set_per_vertex_point_size(). Once enabled the point size can be set either by drawing with an attribute named 'cogl_point_size_in' or by writing to the 'cogl_point_size_out' builtin from a snippet. There is a feature flag which must be checked for before using per-vertex point sizes. This will only be set on GL >= 2.0 or on GLES 2.0. GL will only let you set a per-vertex point size from GLSL by writing to gl_PointSize. This is only available in GL2 and not in the older GLSL extensions. The per-vertex point size has its own pipeline state flag so that it can be part of the state that affects vertex shader generation. Having to enable the per vertex point size with a separate function is a bit awkward. Ideally it would work like the color attribute where you can just set it for every vertex in your primitive with cogl_pipeline_set_color or set it per-vertex by just using the attribute. This is harder to get working with the point size because we need to generate a different vertex shader depending on what attributes are bound. I think if we wanted to make this work transparently we would still want to internally have a pipeline property describing whether the shader was generated with per-vertex support so that it would work with the shader cache correctly. Potentially we could make the per-vertex property internal and automatically make a weak pipeline whenever the attribute is bound. However we would then also need to automatically detect when an application is writing to cogl_point_size_out from a snippet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 8495d9c1c15ce389885a9356d965eabd97758115) Conflicts: cogl/cogl-context.c cogl/cogl-pipeline-private.h cogl/cogl-pipeline.c cogl/cogl-private.h cogl/driver/gl/cogl-pipeline-progend-fixed.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c
2012-11-08 16:56:02 +00:00
if (cogl_pipeline_get_per_vertex_point_size (pipeline))
g_string_append (shader_state->header,
"attribute float cogl_point_size_in;\n");
else if (!(ctx->private_feature_flags &
COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM))
{
/* There is no builtin uniform for the point size on GLES2 so we
Don't generate GLSL for the point size for default pipelines Previously on GLES2 where there is no builtin point size uniform then we would always add a line to the vertex shader to write to the builtin point size output because when generating the shader it is not possible to determine if the pipeline will be used to draw points or not. This patch changes it so that the default point size is 0.0f which is documented to have undefined results when drawing points. That way we can avoid adding the point size code to the shader in that case. The assumption is that any application that is drawing points will probably have explicitly set the point size on the pipeline anyway so it is not a big deal to change the default size from 1.0f. This adds a new pipeline state flag to track whether the point size is non-zero. This needs to be its own state because altering it needs to cause a different shader to be added to the pipeline cache. The state flags that affect the vertex shader have been changed from a constant to a runtime function because they will be different depending on whether there is a builtin point size uniform. There is also a unit test to ensure that changing the point size does or doesn't generate a new shader depending on the values. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit b2eba06e16b587acbf5c57944a70ceccecb4f175) Conflicts: cogl/cogl-pipeline-private.h cogl/cogl-pipeline-state-private.h cogl/cogl-pipeline-state.c cogl/cogl-pipeline.c
2013-06-20 12:25:49 +00:00
need to copy it from the custom uniform in the vertex shader
if we're not using per-vertex point sizes, however we'll only
do this if the point-size is non-zero. Toggle the point size
between zero and non-zero causes a state change which
generates a new program */
if (cogl_pipeline_get_point_size (pipeline) > 0.0f)
{
g_string_append (shader_state->header,
"uniform float cogl_point_size_in;\n");
g_string_append (shader_state->source,
" cogl_point_size_out = cogl_point_size_in;\n");
}
Add support for per-vertex point sizes This adds a new function to enable per-vertex point size on a pipeline. This can be set with cogl_pipeline_set_per_vertex_point_size(). Once enabled the point size can be set either by drawing with an attribute named 'cogl_point_size_in' or by writing to the 'cogl_point_size_out' builtin from a snippet. There is a feature flag which must be checked for before using per-vertex point sizes. This will only be set on GL >= 2.0 or on GLES 2.0. GL will only let you set a per-vertex point size from GLSL by writing to gl_PointSize. This is only available in GL2 and not in the older GLSL extensions. The per-vertex point size has its own pipeline state flag so that it can be part of the state that affects vertex shader generation. Having to enable the per vertex point size with a separate function is a bit awkward. Ideally it would work like the color attribute where you can just set it for every vertex in your primitive with cogl_pipeline_set_color or set it per-vertex by just using the attribute. This is harder to get working with the point size because we need to generate a different vertex shader depending on what attributes are bound. I think if we wanted to make this work transparently we would still want to internally have a pipeline property describing whether the shader was generated with per-vertex support so that it would work with the shader cache correctly. Potentially we could make the per-vertex property internal and automatically make a weak pipeline whenever the attribute is bound. However we would then also need to automatically detect when an application is writing to cogl_point_size_out from a snippet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 8495d9c1c15ce389885a9356d965eabd97758115) Conflicts: cogl/cogl-context.c cogl/cogl-pipeline-private.h cogl/cogl-pipeline.c cogl/cogl-private.h cogl/driver/gl/cogl-pipeline-progend-fixed.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c
2012-11-08 16:56:02 +00:00
}
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 20:48:45 +00:00
}
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
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 20:48:45 +00:00
_cogl_pipeline_vertend_glsl_add_layer (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
Re-design the matrix stack using a graph of ops This re-designs the matrix stack so we now keep track of each separate operation such as rotating, scaling, translating and multiplying as immutable, ref-counted nodes in a graph. Being a "graph" here means that different transformations composed of a sequence of linked operation nodes may share nodes. The first node in a matrix-stack is always a LOAD_IDENTITY operation. As an example consider if an application where to draw three rectangles A, B and C something like this: cogl_framebuffer_scale (fb, 2, 2, 2); cogl_framebuffer_push_matrix(fb); cogl_framebuffer_translate (fb, 10, 0, 0); cogl_framebuffer_push_matrix(fb); cogl_framebuffer_rotate (fb, 45, 0, 0, 1); cogl_framebuffer_draw_rectangle (...); /* A */ cogl_framebuffer_pop_matrix(fb); cogl_framebuffer_draw_rectangle (...); /* B */ cogl_framebuffer_pop_matrix(fb); cogl_framebuffer_push_matrix(fb); cogl_framebuffer_set_modelview_matrix (fb, &mv); cogl_framebuffer_draw_rectangle (...); /* C */ cogl_framebuffer_pop_matrix(fb); That would result in a graph of nodes like this: LOAD_IDENTITY | SCALE / \ SAVE LOAD | | TRANSLATE RECTANGLE(C) | \ SAVE RECTANGLE(B) | ROTATE | RECTANGLE(A) Each push adds a SAVE operation which serves as a marker to rewind too when a corresponding pop is issued and also each SAVE node may also store a cached matrix representing the composition of all its ancestor nodes. This means if we repeatedly need to resolve a real CoglMatrix for a given node then we don't need to repeat the composition. Some advantages of this design are: - A single pointer to any node in the graph can now represent a complete, immutable transformation that can be logged for example into a journal. Previously we were storing a full CoglMatrix in each journal entry which is 16 floats for the matrix itself as well as space for flags and another 16 floats for possibly storing a cache of the inverse. This means that we significantly reduce the size of the journal when drawing lots of primitives and we also avoid copying over 128 bytes per entry. - It becomes much cheaper to check for equality. In cases where some (unlikely) false negatives are allowed simply comparing the pointers of two matrix stack graph entries is enough. Previously we would use memcmp() to compare matrices. - It becomes easier to do comparisons of transformations. By looking for the common ancestry between nodes we can determine the operations that differentiate the transforms and use those to gain a high level understanding of the differences. For example we use this in the journal to be able to efficiently determine when two rectangle transforms only differ by some translation so that we can perform software clipping. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit f75aee93f6b293ca7a7babbd8fcc326ee6bf7aef)
2012-02-20 15:59:48 +00:00
unsigned long layers_difference,
CoglFramebuffer *framebuffer)
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 20:48:45 +00:00
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
CoglPipelineShaderState *shader_state;
snippet: Add a hook for the layer texture coordinate transformation This adds a hook called COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM. This can be used to alter the application of the layer user matrix to a texture coordinate or it can bypass it altogether. This is the first per-layer hook that affects the vertex shader state so the patch includes the boilerplate needed to get that to work. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 19:58:15 +00:00
CoglPipelineSnippetData snippet_data;
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
int layer_index = layer->index;
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 20:48:45 +00:00
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 19:44:56 +00:00
_COGL_GET_CONTEXT (ctx, FALSE);
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
shader_state = get_shader_state (pipeline);
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
if (shader_state->source == NULL)
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 20:48:45 +00:00
return TRUE;
/* Transform the texture coordinates by the layer's user matrix.
*
* FIXME: this should avoid doing the transform if there is no user
* matrix set. This might need a separate layer state flag for
* whether there is a user matrix
*
* FIXME: we could be more clever here and try to detect if the
* fragment program is going to use the texture coordinates and
* avoid setting them if not
*/
snippet: Add a hook for the layer texture coordinate transformation This adds a hook called COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM. This can be used to alter the application of the layer user matrix to a texture coordinate or it can bypass it altogether. This is the first per-layer hook that affects the vertex shader state so the patch includes the boilerplate needed to get that to work. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 19:58:15 +00:00
g_string_append_printf (shader_state->header,
"vec4\n"
"cogl_real_transform_layer%i (mat4 matrix, "
"vec4 tex_coord)\n"
"{\n"
" return matrix * tex_coord;\n"
"}\n",
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
layer_index);
snippet: Add a hook for the layer texture coordinate transformation This adds a hook called COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM. This can be used to alter the application of the layer user matrix to a texture coordinate or it can bypass it altogether. This is the first per-layer hook that affects the vertex shader state so the patch includes the boilerplate needed to get that to work. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 19:58:15 +00:00
/* Wrap the layer code in any snippets that have been hooked */
memset (&snippet_data, 0, sizeof (snippet_data));
snippet_data.snippets = get_layer_vertex_snippets (layer);
snippet_data.hook = COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM;
snippet_data.chain_function = g_strdup_printf ("cogl_real_transform_layer%i",
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
layer_index);
snippet: Add a hook for the layer texture coordinate transformation This adds a hook called COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM. This can be used to alter the application of the layer user matrix to a texture coordinate or it can bypass it altogether. This is the first per-layer hook that affects the vertex shader state so the patch includes the boilerplate needed to get that to work. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 19:58:15 +00:00
snippet_data.final_name = g_strdup_printf ("cogl_transform_layer%i",
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
layer_index);
snippet: Add a hook for the layer texture coordinate transformation This adds a hook called COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM. This can be used to alter the application of the layer user matrix to a texture coordinate or it can bypass it altogether. This is the first per-layer hook that affects the vertex shader state so the patch includes the boilerplate needed to get that to work. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 19:58:15 +00:00
snippet_data.function_prefix = g_strdup_printf ("cogl_transform_layer%i",
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
layer_index);
snippet: Add a hook for the layer texture coordinate transformation This adds a hook called COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM. This can be used to alter the application of the layer user matrix to a texture coordinate or it can bypass it altogether. This is the first per-layer hook that affects the vertex shader state so the patch includes the boilerplate needed to get that to work. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 19:58:15 +00:00
snippet_data.return_type = "vec4";
snippet_data.return_variable = "cogl_tex_coord";
snippet_data.return_variable_is_argument = TRUE;
snippet_data.arguments = "cogl_matrix, cogl_tex_coord";
snippet_data.argument_declarations = "mat4 cogl_matrix, vec4 cogl_tex_coord";
snippet_data.source_buf = shader_state->header;
_cogl_pipeline_snippet_generate_code (&snippet_data);
g_free ((char *) snippet_data.chain_function);
g_free ((char *) snippet_data.final_name);
g_free ((char *) snippet_data.function_prefix);
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
g_string_append_printf (shader_state->source,
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
" cogl_tex_coord%i_out = "
"cogl_transform_layer%i (cogl_texture_matrix%i,\n"
snippet: Add a hook for the layer texture coordinate transformation This adds a hook called COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM. This can be used to alter the application of the layer user matrix to a texture coordinate or it can bypass it altogether. This is the first per-layer hook that affects the vertex shader state so the patch includes the boilerplate needed to get that to work. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 19:58:15 +00:00
" "
" cogl_tex_coord%i_in);\n",
Remove the varying array for tex_coords This removes the need to maintain an array of tex_coord varyings and instead we now just emit a varying per-layer uniquely named using a layer_number infix like cogl_tex_coord0_out and cogl_tex_coord0_in. Notable this patch also had to change the journal flushing code to use pipeline layer numbers to determine the name of texture coordinate attributes. We now also break batches by using a deeper comparison of layers so such that two pipelines with the same number of layers can now cause a batch break if they use different layer numbers. This adds an internal _cogl_pipeline_layer_numbers_equal() function that takes two pipelines and returns TRUE if they have the same number of layers and all the layer numbers are the same too, otherwise it returns FALSE. Where we used to break batches based on changes to the number of layers we now break according to the status of _cogl_pipeline_layer_numbers_equal Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e55b64a9cdc93285049d9b969bef67484c2d9fb3) Note: this will cause a temporary regression for the Cogl 1.x CoglShader api since it will break compatibility with existing shaders that reference the texture varyings from the fragment shader. The intention is to follow up with another patch to add back CoglShader compatibility.
2012-09-27 10:06:16 +00:00
layer_index,
layer_index,
layer_index,
layer_index);
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 20:48:45 +00:00
return TRUE;
}
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
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 20:48:45 +00:00
_cogl_pipeline_vertend_glsl_end (CoglPipeline *pipeline,
unsigned long pipelines_difference)
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
CoglPipelineShaderState *shader_state;
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 20:48:45 +00:00
_COGL_GET_CONTEXT (ctx, FALSE);
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
shader_state = get_shader_state (pipeline);
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
if (shader_state->source)
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 20:48:45 +00:00
{
const char *source_strings[2];
GLint lengths[2];
GLint compile_status;
GLuint shader;
pipeline: Move the snippet source loop into a common function The two loops that generate the functions for the snippets in the fragend and vertend are very similar so to avoid code duplication this patch moves the logic to its own function in a new cogl-pipeline-snippet.c file. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-25 15:31:21 +00:00
CoglPipelineSnippetData snippet_data;
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 14:21:07 +00:00
CoglPipelineSnippetList *vertex_snippets;
Add support for per-vertex point sizes This adds a new function to enable per-vertex point size on a pipeline. This can be set with cogl_pipeline_set_per_vertex_point_size(). Once enabled the point size can be set either by drawing with an attribute named 'cogl_point_size_in' or by writing to the 'cogl_point_size_out' builtin from a snippet. There is a feature flag which must be checked for before using per-vertex point sizes. This will only be set on GL >= 2.0 or on GLES 2.0. GL will only let you set a per-vertex point size from GLSL by writing to gl_PointSize. This is only available in GL2 and not in the older GLSL extensions. The per-vertex point size has its own pipeline state flag so that it can be part of the state that affects vertex shader generation. Having to enable the per vertex point size with a separate function is a bit awkward. Ideally it would work like the color attribute where you can just set it for every vertex in your primitive with cogl_pipeline_set_color or set it per-vertex by just using the attribute. This is harder to get working with the point size because we need to generate a different vertex shader depending on what attributes are bound. I think if we wanted to make this work transparently we would still want to internally have a pipeline property describing whether the shader was generated with per-vertex support so that it would work with the shader cache correctly. Potentially we could make the per-vertex property internal and automatically make a weak pipeline whenever the attribute is bound. However we would then also need to automatically detect when an application is writing to cogl_point_size_out from a snippet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 8495d9c1c15ce389885a9356d965eabd97758115) Conflicts: cogl/cogl-context.c cogl/cogl-pipeline-private.h cogl/cogl-pipeline.c cogl/cogl-private.h cogl/driver/gl/cogl-pipeline-progend-fixed.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c
2012-11-08 16:56:02 +00:00
CoglBool has_per_vertex_point_size =
cogl_pipeline_get_per_vertex_point_size (pipeline);
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 20:48:45 +00:00
COGL_STATIC_COUNTER (vertend_glsl_compile_counter,
"glsl vertex compile counter",
"Increments each time a new GLSL "
"vertex shader is compiled",
0 /* no application private data */);
COGL_COUNTER_INC (_cogl_uprof_context, vertend_glsl_compile_counter);
snippet: Add a hook for the vertex transform This adds a hook to wrap or replace the vertex transform stage. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 22:06:53 +00:00
g_string_append (shader_state->header,
"void\n"
"cogl_real_vertex_transform ()\n"
"{\n"
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 20:48:45 +00:00
" cogl_position_out = "
"cogl_modelview_projection_matrix * "
"cogl_position_in;\n"
snippet: Add a hook for the vertex transform This adds a hook to wrap or replace the vertex transform stage. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 22:06:53 +00:00
"}\n");
g_string_append (shader_state->source,
Add support for per-vertex point sizes This adds a new function to enable per-vertex point size on a pipeline. This can be set with cogl_pipeline_set_per_vertex_point_size(). Once enabled the point size can be set either by drawing with an attribute named 'cogl_point_size_in' or by writing to the 'cogl_point_size_out' builtin from a snippet. There is a feature flag which must be checked for before using per-vertex point sizes. This will only be set on GL >= 2.0 or on GLES 2.0. GL will only let you set a per-vertex point size from GLSL by writing to gl_PointSize. This is only available in GL2 and not in the older GLSL extensions. The per-vertex point size has its own pipeline state flag so that it can be part of the state that affects vertex shader generation. Having to enable the per vertex point size with a separate function is a bit awkward. Ideally it would work like the color attribute where you can just set it for every vertex in your primitive with cogl_pipeline_set_color or set it per-vertex by just using the attribute. This is harder to get working with the point size because we need to generate a different vertex shader depending on what attributes are bound. I think if we wanted to make this work transparently we would still want to internally have a pipeline property describing whether the shader was generated with per-vertex support so that it would work with the shader cache correctly. Potentially we could make the per-vertex property internal and automatically make a weak pipeline whenever the attribute is bound. However we would then also need to automatically detect when an application is writing to cogl_point_size_out from a snippet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 8495d9c1c15ce389885a9356d965eabd97758115) Conflicts: cogl/cogl-context.c cogl/cogl-pipeline-private.h cogl/cogl-pipeline.c cogl/cogl-private.h cogl/driver/gl/cogl-pipeline-progend-fixed.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c
2012-11-08 16:56:02 +00:00
" cogl_vertex_transform ();\n");
if (has_per_vertex_point_size)
{
g_string_append (shader_state->header,
"void\n"
"cogl_real_point_size_calculation ()\n"
"{\n"
" cogl_point_size_out = cogl_point_size_in;\n"
"}\n");
g_string_append (shader_state->source,
" cogl_point_size_calculation ();\n");
}
g_string_append (shader_state->source,
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 20:48:45 +00:00
" cogl_color_out = cogl_color_in;\n"
pipeline: Wrap each snippet in its own function Each snippet is now given its own function which contains the pre and post strings. Between these strings the function will chain on to another function. The generated cogl source is now stored in a function called cogl_generated_source() which the last snippet will chain on to. This should make it so that each snippet has its own namespace for local variables and it can share variables declared in the pre string in the post string. Hopefully the GLSL compiler will just inline all of the functions so it shouldn't make much difference to the compiled output. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-25 13:41:13 +00:00
"}\n");
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 16:52:21 +00:00
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 14:21:07 +00:00
vertex_snippets = get_vertex_snippets (pipeline);
snippet: Add a hook for the vertex transform This adds a hook to wrap or replace the vertex transform stage. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 22:06:53 +00:00
/* Add hooks for the vertex transform part */
memset (&snippet_data, 0, sizeof (snippet_data));
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 14:21:07 +00:00
snippet_data.snippets = vertex_snippets;
snippet: Add a hook for the vertex transform This adds a hook to wrap or replace the vertex transform stage. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-28 22:06:53 +00:00
snippet_data.hook = COGL_SNIPPET_HOOK_VERTEX_TRANSFORM;
snippet_data.chain_function = "cogl_real_vertex_transform";
snippet_data.final_name = "cogl_vertex_transform";
snippet_data.function_prefix = "cogl_vertex_transform";
snippet_data.source_buf = shader_state->header;
_cogl_pipeline_snippet_generate_code (&snippet_data);
Add support for per-vertex point sizes This adds a new function to enable per-vertex point size on a pipeline. This can be set with cogl_pipeline_set_per_vertex_point_size(). Once enabled the point size can be set either by drawing with an attribute named 'cogl_point_size_in' or by writing to the 'cogl_point_size_out' builtin from a snippet. There is a feature flag which must be checked for before using per-vertex point sizes. This will only be set on GL >= 2.0 or on GLES 2.0. GL will only let you set a per-vertex point size from GLSL by writing to gl_PointSize. This is only available in GL2 and not in the older GLSL extensions. The per-vertex point size has its own pipeline state flag so that it can be part of the state that affects vertex shader generation. Having to enable the per vertex point size with a separate function is a bit awkward. Ideally it would work like the color attribute where you can just set it for every vertex in your primitive with cogl_pipeline_set_color or set it per-vertex by just using the attribute. This is harder to get working with the point size because we need to generate a different vertex shader depending on what attributes are bound. I think if we wanted to make this work transparently we would still want to internally have a pipeline property describing whether the shader was generated with per-vertex support so that it would work with the shader cache correctly. Potentially we could make the per-vertex property internal and automatically make a weak pipeline whenever the attribute is bound. However we would then also need to automatically detect when an application is writing to cogl_point_size_out from a snippet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 8495d9c1c15ce389885a9356d965eabd97758115) Conflicts: cogl/cogl-context.c cogl/cogl-pipeline-private.h cogl/cogl-pipeline.c cogl/cogl-private.h cogl/driver/gl/cogl-pipeline-progend-fixed.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c
2012-11-08 16:56:02 +00:00
/* Add hooks for the point size calculation part */
if (has_per_vertex_point_size)
{
memset (&snippet_data, 0, sizeof (snippet_data));
snippet_data.snippets = vertex_snippets;
snippet_data.hook = COGL_SNIPPET_HOOK_POINT_SIZE;
snippet_data.chain_function = "cogl_real_point_size_calculation";
snippet_data.final_name = "cogl_point_size_calculation";
snippet_data.function_prefix = "cogl_point_size_calculation";
snippet_data.source_buf = shader_state->header;
_cogl_pipeline_snippet_generate_code (&snippet_data);
}
pipeline: Move the snippet source loop into a common function The two loops that generate the functions for the snippets in the fragend and vertend are very similar so to avoid code duplication this patch moves the logic to its own function in a new cogl-pipeline-snippet.c file. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-25 15:31:21 +00:00
/* Add all of the hooks for vertex processing */
memset (&snippet_data, 0, sizeof (snippet_data));
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 14:21:07 +00:00
snippet_data.snippets = vertex_snippets;
snippet: Move the hook to be a property of the snippet Instead of specifying the hook point when adding to the pipeline using a separate function for each hook, the hook is now a property of the snippet. The hook is set on construction and is then read-only. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-25 20:54:14 +00:00
snippet_data.hook = COGL_SNIPPET_HOOK_VERTEX;
pipeline: Move the snippet source loop into a common function The two loops that generate the functions for the snippets in the fragend and vertend are very similar so to avoid code duplication this patch moves the logic to its own function in a new cogl-pipeline-snippet.c file. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-25 15:31:21 +00:00
snippet_data.chain_function = "cogl_generated_source";
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 14:21:07 +00:00
snippet_data.final_name = "cogl_vertex_hook";
pipeline: Move the snippet source loop into a common function The two loops that generate the functions for the snippets in the fragend and vertend are very similar so to avoid code duplication this patch moves the logic to its own function in a new cogl-pipeline-snippet.c file. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-25 15:31:21 +00:00
snippet_data.function_prefix = "cogl_vertex_hook";
snippet_data.source_buf = shader_state->source;
_cogl_pipeline_snippet_generate_code (&snippet_data);
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 20:48:45 +00:00
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 14:21:07 +00:00
g_string_append (shader_state->source,
"void\n"
"main ()\n"
"{\n"
" cogl_vertex_hook ();\n");
/* If there are any snippets then we can't rely on the
projection matrix to flip the rendering for offscreen buffers
so we'll need to flip it using an extra statement and a
uniform */
if (_cogl_pipeline_has_vertex_snippets (pipeline))
{
g_string_append (shader_state->header,
"uniform vec4 _cogl_flip_vector;\n");
g_string_append (shader_state->source,
" cogl_position_out *= _cogl_flip_vector;\n");
}
g_string_append (shader_state->source,
"}\n");
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 20:51:00 +00:00
GE_RET( shader, ctx, glCreateShader (GL_VERTEX_SHADER) );
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
lengths[0] = shader_state->header->len;
source_strings[0] = shader_state->header->str;
lengths[1] = shader_state->source->len;
source_strings[1] = shader_state->source->str;
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 20:48:45 +00:00
add cogl-glsl-shader files to aid backporting patches To aid with backporting patches from master made after the deprecated CoglShader api was removed this patch adds the cogl-glsl- files that have been added on master so we should get less conflicts when cherry picking.
2013-01-07 19:16:11 +00:00
_cogl_glsl_shader_set_source_with_boilerplate (ctx,
Unify a lot of gles2 vs gl glsl code Since we used to support hybrid fixed-function + glsl pipelines when running with OpenGL there were numerous differences in how we handled codegen and uniform updates between GLES2 and full OpenGL. Now that we only support end-to-end glsl pipelines this patch can largely unify how we handle GLES2 and OpenGL. Most notably we now never use the builtin attribute names. This should also make it easy for us to support creating strict OpenGL 3.1 contexts where the builtin names have been removed. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 2701b93f159bf2d3387cedf2d06fe921ad5641f3)
2012-09-23 12:32:36 +00:00
NULL,
add cogl-glsl-shader files to aid backporting patches To aid with backporting patches from master made after the deprecated CoglShader api was removed this patch adds the cogl-glsl- files that have been added on master so we should get less conflicts when cherry picking.
2013-01-07 19:16:11 +00:00
shader, GL_VERTEX_SHADER,
Adds back tex_coord array for CoglShader compatibility This adds back compatibility for CoglShaders that reference the cogl_tex_coord_in[] or cogl_tex_coord_out[] varyings. Unlike the previous way this was done this patch maintains the use of layer numbers for attributes and maintains forwards compatibility by letting shaders alternatively access the per-layer tex_coord varyings via cogl_tex_coord%i_in/out defines that index into the array.
2013-01-19 16:00:33 +00:00
pipeline,
add cogl-glsl-shader files to aid backporting patches To aid with backporting patches from master made after the deprecated CoglShader api was removed this patch adds the cogl-glsl- files that have been added on master so we should get less conflicts when cherry picking.
2013-01-07 19:16:11 +00:00
2, /* count */
source_strings, lengths);
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 20:48:45 +00:00
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 20:51:00 +00:00
GE( ctx, glCompileShader (shader) );
GE( ctx, glGetShaderiv (shader, GL_COMPILE_STATUS, &compile_status) );
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 20:48:45 +00:00
if (!compile_status)
{
GLint len = 0;
char *shader_log;
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 20:51:00 +00:00
GE( ctx, glGetShaderiv (shader, GL_INFO_LOG_LENGTH, &len) );
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 20:48:45 +00:00
shader_log = g_alloca (len);
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 20:51:00 +00:00
GE( ctx, glGetShaderInfoLog (shader, len, &len, shader_log) );
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 20:48:45 +00:00
g_warning ("Shader compilation failed:\n%s", shader_log);
}
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
shader_state->header = NULL;
shader_state->source = NULL;
shader_state->gl_shader = shader;
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 20:48:45 +00:00
}
Add support for per-vertex point sizes This adds a new function to enable per-vertex point size on a pipeline. This can be set with cogl_pipeline_set_per_vertex_point_size(). Once enabled the point size can be set either by drawing with an attribute named 'cogl_point_size_in' or by writing to the 'cogl_point_size_out' builtin from a snippet. There is a feature flag which must be checked for before using per-vertex point sizes. This will only be set on GL >= 2.0 or on GLES 2.0. GL will only let you set a per-vertex point size from GLSL by writing to gl_PointSize. This is only available in GL2 and not in the older GLSL extensions. The per-vertex point size has its own pipeline state flag so that it can be part of the state that affects vertex shader generation. Having to enable the per vertex point size with a separate function is a bit awkward. Ideally it would work like the color attribute where you can just set it for every vertex in your primitive with cogl_pipeline_set_color or set it per-vertex by just using the attribute. This is harder to get working with the point size because we need to generate a different vertex shader depending on what attributes are bound. I think if we wanted to make this work transparently we would still want to internally have a pipeline property describing whether the shader was generated with per-vertex support so that it would work with the shader cache correctly. Potentially we could make the per-vertex property internal and automatically make a weak pipeline whenever the attribute is bound. However we would then also need to automatically detect when an application is writing to cogl_point_size_out from a snippet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 8495d9c1c15ce389885a9356d965eabd97758115) Conflicts: cogl/cogl-context.c cogl/cogl-pipeline-private.h cogl/cogl-pipeline.c cogl/cogl-private.h cogl/driver/gl/cogl-pipeline-progend-fixed.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c
2012-11-08 16:56:02 +00:00
#ifdef HAVE_COGL_GL
Add a GL 3 driver This adds a new CoglDriver for GL 3 called COGL_DRIVER_GL3. When requested, the GLX, EGL and SDL2 winsyss will set the necessary attributes to request a forward-compatible core profile 3.1 context. That means it will have no deprecated features. To simplify the explosion of checks for specific combinations of context->driver, many of these conditionals have now been replaced with private feature flags that are checked instead. The GL and GLES drivers now initialise these private feature flags depending on which driver is used. The fixed function backends now explicitly check whether the fixed function private feature is available which means the GL3 driver will fall back to always using the GLSL progend. Since Rob's latest patches the GLSL progend no longer uses any fixed function API anyway so it should just work. The driver is currently lower priority than COGL_DRIVER_GL so it will not be used unless it is specificly requested. We may want to change this priority at some point because apparently Mesa can make some memory savings if a core profile context is used. In GL 3, getting the combined extensions string with glGetString is deprecated so this patch changes it to use glGetStringi to build up an array of extensions instead. _cogl_context_get_gl_extensions now returns this array instead of trying to return a const string. The caller is expected to free the array. Some issues with this patch: • GL 3 does not support GL_ALPHA format textures. We should probably make this a feature flag or something. Cogl uses this to render text which currently just throws a GL error and breaks so it's pretty important to do something about this before considering the GL3 driver to be stable. • GL 3 doesn't support client side vertex buffers. This probably doesn't matter because CoglBuffer won't normally use malloc'd buffers if VBOs are available, but it might but worth making malloc'd buffers a private feature and forcing it not to use them. • GL 3 doesn't support the default vertex array object. This patch just makes it create and bind a single non-default vertex array object which gets used just like the normal default object. Ideally it would be good to use vertex array objects properly and attach them to a CoglPrimitive to cache the state. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 66c9db993595b3a22e63f4c201ea468bc9b88cb6)
2012-09-26 19:32:36 +00:00
if ((ctx->private_feature_flags &
COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM) &&
vertend-glsl: Fix flushing the point size with the GL driver When using the GLSL vertend on GL, the point size was being flushed in _cogl_pipeline_vertend_glsl_start. However, this function bails out early if the pipeline already has a usable program so it would not hit the code to flush the point size in that case. This patch moves the code to _cogl_pipeline_vertend_glsl_end so that it will always be flushed if it is different. That is the same place that is flushed for the fixed vertend. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-02-28 14:10:43 +00:00
(pipelines_difference & COGL_PIPELINE_STATE_POINT_SIZE))
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_POINT_SIZE);
Don't generate GLSL for the point size for default pipelines Previously on GLES2 where there is no builtin point size uniform then we would always add a line to the vertex shader to write to the builtin point size output because when generating the shader it is not possible to determine if the pipeline will be used to draw points or not. This patch changes it so that the default point size is 0.0f which is documented to have undefined results when drawing points. That way we can avoid adding the point size code to the shader in that case. The assumption is that any application that is drawing points will probably have explicitly set the point size on the pipeline anyway so it is not a big deal to change the default size from 1.0f. This adds a new pipeline state flag to track whether the point size is non-zero. This needs to be its own state because altering it needs to cause a different shader to be added to the pipeline cache. The state flags that affect the vertex shader have been changed from a constant to a runtime function because they will be different depending on whether there is a builtin point size uniform. There is also a unit test to ensure that changing the point size does or doesn't generate a new shader depending on the values. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit b2eba06e16b587acbf5c57944a70ceccecb4f175) Conflicts: cogl/cogl-pipeline-private.h cogl/cogl-pipeline-state-private.h cogl/cogl-pipeline-state.c cogl/cogl-pipeline.c
2013-06-20 12:25:49 +00:00
if (authority->big_state->point_size > 0.0f)
GE( ctx, glPointSize (authority->big_state->point_size) );
vertend-glsl: Fix flushing the point size with the GL driver When using the GLSL vertend on GL, the point size was being flushed in _cogl_pipeline_vertend_glsl_start. However, this function bails out early if the pipeline already has a usable program so it would not hit the code to flush the point size in that case. This patch moves the code to _cogl_pipeline_vertend_glsl_end so that it will always be flushed if it is different. That is the same place that is flushed for the fixed vertend. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-02-28 14:10:43 +00:00
}
Add support for per-vertex point sizes This adds a new function to enable per-vertex point size on a pipeline. This can be set with cogl_pipeline_set_per_vertex_point_size(). Once enabled the point size can be set either by drawing with an attribute named 'cogl_point_size_in' or by writing to the 'cogl_point_size_out' builtin from a snippet. There is a feature flag which must be checked for before using per-vertex point sizes. This will only be set on GL >= 2.0 or on GLES 2.0. GL will only let you set a per-vertex point size from GLSL by writing to gl_PointSize. This is only available in GL2 and not in the older GLSL extensions. The per-vertex point size has its own pipeline state flag so that it can be part of the state that affects vertex shader generation. Having to enable the per vertex point size with a separate function is a bit awkward. Ideally it would work like the color attribute where you can just set it for every vertex in your primitive with cogl_pipeline_set_color or set it per-vertex by just using the attribute. This is harder to get working with the point size because we need to generate a different vertex shader depending on what attributes are bound. I think if we wanted to make this work transparently we would still want to internally have a pipeline property describing whether the shader was generated with per-vertex support so that it would work with the shader cache correctly. Potentially we could make the per-vertex property internal and automatically make a weak pipeline whenever the attribute is bound. However we would then also need to automatically detect when an application is writing to cogl_point_size_out from a snippet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 8495d9c1c15ce389885a9356d965eabd97758115) Conflicts: cogl/cogl-context.c cogl/cogl-pipeline-private.h cogl/cogl-pipeline.c cogl/cogl-private.h cogl/driver/gl/cogl-pipeline-progend-fixed.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c
2012-11-08 16:56:02 +00:00
#endif /* HAVE_COGL_GL */
vertend-glsl: Fix flushing the point size with the GL driver When using the GLSL vertend on GL, the point size was being flushed in _cogl_pipeline_vertend_glsl_start. However, this function bails out early if the pipeline already has a usable program so it would not hit the code to flush the point size in that case. This patch moves the code to _cogl_pipeline_vertend_glsl_end so that it will always be flushed if it is different. That is the same place that is flushed for the fixed vertend. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-02-28 14:10:43 +00:00
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 20:48:45 +00:00
return TRUE;
}
static void
_cogl_pipeline_vertend_glsl_pre_change_notify (CoglPipeline *pipeline,
CoglPipelineState change,
const CoglColor *new_color)
{
Don't generate GLSL for the point size for default pipelines Previously on GLES2 where there is no builtin point size uniform then we would always add a line to the vertex shader to write to the builtin point size output because when generating the shader it is not possible to determine if the pipeline will be used to draw points or not. This patch changes it so that the default point size is 0.0f which is documented to have undefined results when drawing points. That way we can avoid adding the point size code to the shader in that case. The assumption is that any application that is drawing points will probably have explicitly set the point size on the pipeline anyway so it is not a big deal to change the default size from 1.0f. This adds a new pipeline state flag to track whether the point size is non-zero. This needs to be its own state because altering it needs to cause a different shader to be added to the pipeline cache. The state flags that affect the vertex shader have been changed from a constant to a runtime function because they will be different depending on whether there is a builtin point size uniform. There is also a unit test to ensure that changing the point size does or doesn't generate a new shader depending on the values. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit b2eba06e16b587acbf5c57944a70ceccecb4f175) Conflicts: cogl/cogl-pipeline-private.h cogl/cogl-pipeline-state-private.h cogl/cogl-pipeline-state.c cogl/cogl-pipeline.c
2013-06-20 12:25:49 +00:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if ((change & _cogl_pipeline_get_state_for_vertex_codegen (ctx)))
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
dirty_shader_state (pipeline);
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 20:48:45 +00:00
}
/* 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_vertend_glsl_layer_pre_change_notify (
CoglPipeline *owner,
CoglPipelineLayer *layer,
CoglPipelineLayerState change)
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
CoglPipelineShaderState *shader_state;
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 20:48:45 +00:00
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
shader_state = get_shader_state (owner);
if (!shader_state)
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 20:48:45 +00:00
return;
if ((change & COGL_PIPELINE_LAYER_STATE_AFFECTS_VERTEX_CODEGEN))
{
pipeline: Unify how the backends store private data Previously the fragends had a separate private data pointer which was used by the GLSL and ARBfp fragends to store a tiny struct containing a single pointer to the ref-counted shader state. The space for the private data pointer is reserved in all of the pipelines for all of the potential backends. The vertends and progends however did this differently by directly storing the pointer to the ref counted data using cogl_object_set_user_data. This patch unifies the different methods so that they all use cogl_object_set_user_data and the fragends don't bother with the separate tiny allocation for the private data. The private data pointer array has been removed from CoglPipeline and the corresponding fragend virtual to free the private data has also been removed because this can instead be done with the destroy notify from the object user data. The variable names used have been unified so that all of the vertends and fragends name their data struct CoglPipelineShaderState and use a variable called shader_state to refer to it. The progend uses CoglPipelineProgramState and a variable called program_state. This should also fix two potential bugs. the ARBfp fragend was apprently leaking a reference to the private state when it creates the private data because it was adding a reference before stroring the pointer to the newly allocated data but the ref count is already set to 1 on creation. The other potential bug is that the free function for CoglPipeline was only calling the free_priv virtual for the currently used fragend of the pipeline. The design of the fragends is meant to allow a pipeline to have multiple fragend priv datas because a child pipeline could be attaching its fragend data to the ancestor and its allowed to pick a different fragend.
2011-06-30 12:39:48 +00:00
dirty_shader_state (owner);
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 20:48:45 +00:00
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. */
}
const CoglPipelineVertend _cogl_pipeline_glsl_vertend =
{
_cogl_pipeline_vertend_glsl_start,
_cogl_pipeline_vertend_glsl_add_layer,
_cogl_pipeline_vertend_glsl_end,
_cogl_pipeline_vertend_glsl_pre_change_notify,
_cogl_pipeline_vertend_glsl_layer_pre_change_notify
};
Don't generate GLSL for the point size for default pipelines Previously on GLES2 where there is no builtin point size uniform then we would always add a line to the vertex shader to write to the builtin point size output because when generating the shader it is not possible to determine if the pipeline will be used to draw points or not. This patch changes it so that the default point size is 0.0f which is documented to have undefined results when drawing points. That way we can avoid adding the point size code to the shader in that case. The assumption is that any application that is drawing points will probably have explicitly set the point size on the pipeline anyway so it is not a big deal to change the default size from 1.0f. This adds a new pipeline state flag to track whether the point size is non-zero. This needs to be its own state because altering it needs to cause a different shader to be added to the pipeline cache. The state flags that affect the vertex shader have been changed from a constant to a runtime function because they will be different depending on whether there is a builtin point size uniform. There is also a unit test to ensure that changing the point size does or doesn't generate a new shader depending on the values. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit b2eba06e16b587acbf5c57944a70ceccecb4f175) Conflicts: cogl/cogl-pipeline-private.h cogl/cogl-pipeline-state-private.h cogl/cogl-pipeline-state.c cogl/cogl-pipeline.c
2013-06-20 12:25:49 +00:00
UNIT_TEST (check_point_size_shader,
0 /* no requirements */,
0 /* no failure cases */)
{
CoglPipeline *pipelines[4];
CoglPipelineShaderState *shader_states[G_N_ELEMENTS (pipelines)];
int i;
/* Default pipeline with zero point size */
pipelines[0] = cogl_pipeline_new (test_ctx);
/* Point size 1 */
pipelines[1] = cogl_pipeline_new (test_ctx);
cogl_pipeline_set_point_size (pipelines[1], 1.0f);
/* Point size 2 */
pipelines[2] = cogl_pipeline_new (test_ctx);
cogl_pipeline_set_point_size (pipelines[2], 2.0f);
/* Same as the first pipeline, but reached by restoring the old
* state from a copy */
pipelines[3] = cogl_pipeline_copy (pipelines[1]);
cogl_pipeline_set_point_size (pipelines[3], 0.0f);
/* Draw something with all of the pipelines to make sure their state
* is flushed */
for (i = 0; i < G_N_ELEMENTS (pipelines); i++)
cogl_framebuffer_draw_rectangle (test_fb,
pipelines[i],
0.0f, 0.0f,
10.0f, 10.0f);
cogl_framebuffer_finish (test_fb);
/* Get all of the shader states. These might be NULL if the driver
* is not using GLSL */
for (i = 0; i < G_N_ELEMENTS (pipelines); i++)
shader_states[i] = get_shader_state (pipelines[i]);
/* If the first two pipelines are using GLSL then they should have
* the same shader unless there is no builtin uniform for the point
* size */
if (shader_states[0])
{
if ((test_ctx->private_feature_flags &
COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM))
g_assert (shader_states[0] == shader_states[1]);
else
g_assert (shader_states[0] != shader_states[1]);
}
/* The second and third pipelines should always have the same shader
* state because only toggling between zero and non-zero should
* change the shader */
g_assert (shader_states[1] == shader_states[2]);
/* The fourth pipeline should be exactly the same as the first */
g_assert (shader_states[0] == shader_states[3]);
}
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 20:48:45 +00:00
#endif /* COGL_PIPELINE_VERTEND_GLSL */
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