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mutter-performance-source/cogl/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
*
* Copyright (C) 2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-pipeline-private.h"
#include "cogl-pipeline-opengl-private.h"
#ifdef COGL_PIPELINE_VERTEND_GLSL
#include "cogl.h"
#include "cogl-internal.h"
cogl: rename cogl-context.h cogl-context-private.h Since we plan to add public cogl_context_* API we need to rename the current cogl-context.h which contains private member details.
2010-11-04 22:25:52 +00:00
#include "cogl-context-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-handle.h"
#include "cogl-program-private.h"
#include "cogl-pipeline-vertend-glsl-private.h"
const CoglPipelineVertend _cogl_pipeline_glsl_vertend;
typedef struct
{
unsigned int ref_count;
GLuint gl_shader;
GString *header, *source;
/* Age of the user program that was current when the shader was
generated. We need to keep track of this because if the user
program changes then we may need to redecide whether to generate
a shader at all */
unsigned int user_program_age;
} CoglPipelineVertendPrivate;
static CoglUserDataKey glsl_priv_key;
static CoglPipelineVertendPrivate *
get_glsl_priv (CoglPipeline *pipeline)
{
return cogl_object_get_user_data (COGL_OBJECT (pipeline), &glsl_priv_key);
}
static void
destroy_glsl_priv (void *user_data)
{
CoglPipelineVertendPrivate *priv = user_data;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (--priv->ref_count == 0)
{
if (priv->gl_shader)
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, glDeleteShader (priv->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
g_slice_free (CoglPipelineVertendPrivate, priv);
}
}
static void
set_glsl_priv (CoglPipeline *pipeline, CoglPipelineVertendPrivate *priv)
{
cogl_object_set_user_data (COGL_OBJECT (pipeline),
&glsl_priv_key,
priv,
destroy_glsl_priv);
}
static void
dirty_glsl_shader_state (CoglPipeline *pipeline)
{
cogl_object_set_user_data (COGL_OBJECT (pipeline),
&glsl_priv_key,
NULL,
destroy_glsl_priv);
}
GLuint
_cogl_pipeline_vertend_glsl_get_shader (CoglPipeline *pipeline)
{
CoglPipelineVertendPrivate *priv = get_glsl_priv (pipeline);
if (priv)
return priv->gl_shader;
else
return 0;
}
static gboolean
_cogl_pipeline_vertend_glsl_start (CoglPipeline *pipeline,
int n_layers,
unsigned long pipelines_difference)
{
CoglPipelineVertendPrivate *priv;
CoglProgram *user_program;
_COGL_GET_CONTEXT (ctx, FALSE);
if (!cogl_features_available (COGL_FEATURE_SHADERS_GLSL))
return FALSE;
user_program = cogl_pipeline_get_user_program (pipeline);
/* If the user program has a vertex shader that isn't GLSL then the
appropriate vertend for that language should handle it */
if (user_program &&
_cogl_program_has_vertex_shader (user_program) &&
_cogl_program_get_language (user_program) != COGL_SHADER_LANGUAGE_GLSL)
return FALSE;
/* Now lookup our glsl backend private state (allocating if
* necessary) */
priv = get_glsl_priv (pipeline);
if (priv == NULL)
{
CoglPipeline *authority;
/* Get the authority for anything affecting vertex shader
state */
authority = _cogl_pipeline_find_equivalent_parent
(pipeline,
COGL_PIPELINE_STATE_AFFECTS_VERTEX_CODEGEN &
~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
priv = get_glsl_priv (authority);
if (priv == NULL)
{
priv = g_slice_new0 (CoglPipelineVertendPrivate);
priv->ref_count = 1;
set_glsl_priv (authority, priv);
}
if (authority != pipeline)
{
priv->ref_count++;
set_glsl_priv (pipeline, priv);
}
}
if (priv->gl_shader)
{
/* If we already have a valid GLSL shader then we don't need to
generate a new one. However if there's a user program and it
has changed since the last link then we do need a new shader */
if (user_program == NULL ||
priv->user_program_age == user_program->age)
return TRUE;
/* We need to recreate the shader so destroy the existing one */
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, glDeleteShader (priv->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
priv->gl_shader = 0;
}
/* If we make it here then we have a priv struct without a gl_shader
either because this is the first time we've encountered it or
because the user program has changed */
if (user_program)
priv->user_program_age = user_program->age;
/* If the user program contains a vertex shader then we don't need
to generate one */
if (user_program &&
_cogl_program_has_vertex_shader (user_program))
return TRUE;
/* We reuse two grow-only GStrings for code-gen. One string
contains the uniform and attribute declarations while the
other contains the main function. We need two strings
because we need to dynamically declare attributes as the
add_layer callback is invoked */
g_string_set_size (ctx->codegen_header_buffer, 0);
g_string_set_size (ctx->codegen_source_buffer, 0);
priv->header = ctx->codegen_header_buffer;
priv->source = ctx->codegen_source_buffer;
g_string_append (priv->source,
"void\n"
"main ()\n"
"{\n");
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
if (ctx->driver == COGL_DRIVER_GLES2)
/* There is no builtin uniform for the pointsize on GLES2 so we need
to copy it from the custom uniform in the vertex shader */
g_string_append (priv->source,
" cogl_point_size_out = cogl_point_size_in;\n");
Remove the GLES2 wrapper The GLES2 wrapper is no longer needed because the shader generation is done within the GLSL fragend and vertend and any functions that are different for GLES2 are now guarded by #ifdefs.
2010-12-05 18:02:05 +00:00
/* On regular OpenGL we'll just flush the point size builtin */
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
else if (pipelines_difference & COGL_PIPELINE_STATE_POINT_SIZE)
Remove the GLES2 wrapper The GLES2 wrapper is no longer needed because the shader generation is done within the GLSL fragend and vertend and any functions that are different for GLES2 are now guarded by #ifdefs.
2010-12-05 18:02:05 +00:00
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_POINT_SIZE);
if (ctx->point_size_cache != authority->big_state->point_size)
{
Use all core GL functions through indirect pointers cogl-ext-functions.h now contains definitions for all of the core GL and GLES functions that we would normally link to directly. All of the code has changed to access them through the cogl context pointer. The GE macro now takes an extra parameter to specify the context because the macro itself needs to make GL calls but various points in the Cogl source use different names for the context variable.
2011-07-06 20:51:00 +00:00
GE( ctx, glPointSize (authority->big_state->point_size) );
Remove the GLES2 wrapper The GLES2 wrapper is no longer needed because the shader generation is done within the GLSL fragend and vertend and any functions that are different for GLES2 are now guarded by #ifdefs.
2010-12-05 18:02:05 +00:00
ctx->point_size_cache = authority->big_state->point_size;
}
}
cogl: Add a vertend to generate GLSL The GLSL vertend is mostly only useful for GLES2. The fixed function vertend is kept at higher priority than the GLSL vertend so it is unlikely to be used in any other circumstances.
2010-12-02 20:48:45 +00:00
return TRUE;
}
static gboolean
_cogl_pipeline_vertend_glsl_add_layer (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
unsigned long layers_difference)
{
CoglPipelineVertendPrivate *priv;
int unit_index;
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);
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
priv = get_glsl_priv (pipeline);
unit_index = _cogl_pipeline_layer_get_unit_index (layer);
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
if (ctx->driver != COGL_DRIVER_GLES2)
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
/* We are using the fixed function uniforms for the user matrices
and the only way to set them is with the fixed function API so we
still need to flush them here */
if (layers_difference & COGL_PIPELINE_LAYER_STATE_USER_MATRIX)
{
CoglPipelineLayerState state = COGL_PIPELINE_LAYER_STATE_USER_MATRIX;
CoglPipelineLayer *authority =
_cogl_pipeline_layer_get_authority (layer, state);
CoglTextureUnit *unit = _cogl_get_texture_unit (unit_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_matrix_stack_set (unit->matrix_stack,
&authority->big_state->matrix);
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_set_active_texture_unit (unit_index);
cogl: Set the layer matrix on the right layer instead of a random one When uploading the layer matrix to GL it wasn't first calling glActiveTextureMatrix to set the right texture unit for the layer. This would end up setting the texture matrix on whatever layer happened to be previously active. This happened to work for test-cogl-multitexture presumably because it was coincidentally setting the layer matrix on the last used layer.
2011-02-09 15:24:43 +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_matrix_stack_flush_to_gl (unit->matrix_stack,
COGL_MATRIX_TEXTURE);
}
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 (priv->source == NULL)
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
*/
g_string_append_printf (priv->source,
" cogl_tex_coord_out[%i] = "
"cogl_texture_matrix[%i] * cogl_tex_coord%i_in;\n",
unit_index, unit_index, unit_index);
return TRUE;
}
static gboolean
_cogl_pipeline_vertend_glsl_end (CoglPipeline *pipeline,
unsigned long pipelines_difference)
{
CoglPipelineVertendPrivate *priv;
_COGL_GET_CONTEXT (ctx, FALSE);
priv = get_glsl_priv (pipeline);
if (priv->source)
{
const char *source_strings[2];
GLint lengths[2];
GLint compile_status;
GLuint shader;
int n_layers;
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);
g_string_append (priv->source,
" cogl_position_out = "
"cogl_modelview_projection_matrix * "
"cogl_position_in;\n"
" cogl_color_out = cogl_color_in;\n"
"}\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
lengths[0] = priv->header->len;
source_strings[0] = priv->header->str;
lengths[1] = priv->source->len;
source_strings[1] = priv->source->str;
n_layers = cogl_pipeline_get_n_layers (pipeline);
_cogl_shader_set_source_with_boilerplate (shader, GL_VERTEX_SHADER,
n_layers,
2, /* count */
source_strings, lengths);
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);
}
priv->header = NULL;
priv->source = NULL;
priv->gl_shader = shader;
}
return TRUE;
}
static void
_cogl_pipeline_vertend_glsl_pre_change_notify (CoglPipeline *pipeline,
CoglPipelineState change,
const CoglColor *new_color)
{
if ((change & COGL_PIPELINE_STATE_AFFECTS_VERTEX_CODEGEN))
dirty_glsl_shader_state (pipeline);
}
/* 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)
{
CoglPipelineVertendPrivate *priv;
priv = get_glsl_priv (owner);
if (!priv)
return;
if ((change & COGL_PIPELINE_LAYER_STATE_AFFECTS_VERTEX_CODEGEN))
{
dirty_glsl_shader_state (owner);
return;
}
/* TODO: we could be saving snippets of texture combine code along
* with each layer and then when a layer changes we would just free
* the snippet. */
}
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
};
#endif /* COGL_PIPELINE_VERTEND_GLSL */
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