7fa04bb1a6
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.
382 lines
10 KiB
C
382 lines
10 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009,2010 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "cogl-shader-private.h"
|
|
#include "cogl-internal.h"
|
|
#include "cogl-context-private.h"
|
|
#include "cogl-object-private.h"
|
|
#include "cogl-glsl-shader-private.h"
|
|
#include "cogl-glsl-shader-boilerplate.h"
|
|
|
|
#include <glib.h>
|
|
|
|
#include <string.h>
|
|
|
|
static void _cogl_shader_free (CoglShader *shader);
|
|
|
|
COGL_HANDLE_DEFINE (Shader, shader);
|
|
COGL_OBJECT_DEFINE_DEPRECATED_REF_COUNTING (shader);
|
|
|
|
#ifndef GL_FRAGMENT_SHADER
|
|
#define GL_FRAGMENT_SHADER 0x8B30
|
|
#endif
|
|
#ifndef GL_VERTEX_SHADER
|
|
#define GL_VERTEX_SHADER 0x8B31
|
|
#endif
|
|
|
|
static void
|
|
_cogl_shader_free (CoglShader *shader)
|
|
{
|
|
/* Frees shader resources but its handle is not
|
|
released! Do that separately before this! */
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
#ifdef HAVE_COGL_GL
|
|
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
|
|
{
|
|
if (shader->gl_handle)
|
|
GE (ctx, glDeletePrograms (1, &shader->gl_handle));
|
|
}
|
|
else
|
|
#endif
|
|
if (shader->gl_handle)
|
|
GE (ctx, glDeleteShader (shader->gl_handle));
|
|
|
|
g_slice_free (CoglShader, shader);
|
|
}
|
|
|
|
CoglHandle
|
|
cogl_create_shader (CoglShaderType type)
|
|
{
|
|
CoglShader *shader;
|
|
|
|
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
|
|
|
|
switch (type)
|
|
{
|
|
case COGL_SHADER_TYPE_VERTEX:
|
|
case COGL_SHADER_TYPE_FRAGMENT:
|
|
break;
|
|
default:
|
|
g_warning ("Unexpected shader type (0x%08lX) given to "
|
|
"cogl_create_shader", (unsigned long) type);
|
|
return COGL_INVALID_HANDLE;
|
|
}
|
|
|
|
shader = g_slice_new (CoglShader);
|
|
shader->language = COGL_SHADER_LANGUAGE_GLSL;
|
|
shader->gl_handle = 0;
|
|
shader->compilation_pipeline = NULL;
|
|
shader->type = type;
|
|
|
|
return _cogl_shader_handle_new (shader);
|
|
}
|
|
|
|
static void
|
|
delete_shader (CoglShader *shader)
|
|
{
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
#ifdef HAVE_COGL_GL
|
|
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
|
|
{
|
|
if (shader->gl_handle)
|
|
GE (ctx, glDeletePrograms (1, &shader->gl_handle));
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
if (shader->gl_handle)
|
|
GE (ctx, glDeleteShader (shader->gl_handle));
|
|
}
|
|
|
|
shader->gl_handle = 0;
|
|
|
|
if (shader->compilation_pipeline)
|
|
{
|
|
cogl_object_unref (shader->compilation_pipeline);
|
|
shader->compilation_pipeline = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
cogl_shader_source (CoglHandle handle,
|
|
const char *source)
|
|
{
|
|
CoglShader *shader;
|
|
CoglShaderLanguage language;
|
|
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
if (!cogl_is_shader (handle))
|
|
return;
|
|
|
|
shader = handle;
|
|
|
|
#ifdef HAVE_COGL_GL
|
|
if (strncmp (source, "!!ARBfp1.0", 10) == 0)
|
|
language = COGL_SHADER_LANGUAGE_ARBFP;
|
|
else
|
|
#endif
|
|
language = COGL_SHADER_LANGUAGE_GLSL;
|
|
|
|
/* Delete the old object if the language is changing... */
|
|
if (G_UNLIKELY (language != shader->language) &&
|
|
shader->gl_handle)
|
|
delete_shader (shader);
|
|
|
|
shader->source = g_strdup (source);
|
|
|
|
shader->language = language;
|
|
}
|
|
|
|
void
|
|
cogl_shader_compile (CoglHandle handle)
|
|
{
|
|
CoglShader *shader;
|
|
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
if (!cogl_is_shader (handle))
|
|
return;
|
|
|
|
#ifdef HAVE_COGL_GL
|
|
shader = handle;
|
|
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
|
|
_cogl_shader_compile_real (handle, NULL);
|
|
#endif
|
|
|
|
/* XXX: For GLSL we don't actually compile anything until the shader
|
|
* gets used so we have an opportunity to add some boilerplate to
|
|
* the shader.
|
|
*
|
|
* At the end of the day this is obviously a badly designed API
|
|
* given that we are having to lie to the user. It was a mistake to
|
|
* so thinly wrap the OpenGL shader API and the current plan is to
|
|
* replace it with a pipeline snippets API. */
|
|
}
|
|
|
|
void
|
|
_cogl_shader_compile_real (CoglHandle handle,
|
|
CoglPipeline *pipeline)
|
|
{
|
|
CoglShader *shader = handle;
|
|
const char *version;
|
|
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
#ifdef HAVE_COGL_GL
|
|
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
|
|
{
|
|
#ifdef COGL_GL_DEBUG
|
|
GLenum gl_error;
|
|
#endif
|
|
|
|
if (shader->gl_handle)
|
|
return;
|
|
|
|
GE (ctx, glGenPrograms (1, &shader->gl_handle));
|
|
|
|
GE (ctx, glBindProgram (GL_FRAGMENT_PROGRAM_ARB, shader->gl_handle));
|
|
|
|
if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_SHOW_SOURCE)))
|
|
g_message ("user ARBfp program:\n%s", shader->source);
|
|
|
|
#ifdef COGL_GL_DEBUG
|
|
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
|
|
;
|
|
#endif
|
|
ctx->glProgramString (GL_FRAGMENT_PROGRAM_ARB,
|
|
GL_PROGRAM_FORMAT_ASCII_ARB,
|
|
strlen (shader->source),
|
|
shader->source);
|
|
#ifdef COGL_GL_DEBUG
|
|
gl_error = ctx->glGetError ();
|
|
if (gl_error != GL_NO_ERROR)
|
|
{
|
|
g_warning ("%s: GL error (%d): Failed to compile ARBfp:\n%s\n%s",
|
|
G_STRLOC,
|
|
gl_error,
|
|
shader->source,
|
|
ctx->glGetString (GL_PROGRAM_ERROR_STRING_ARB));
|
|
}
|
|
#endif
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
GLenum gl_type;
|
|
GLint status;
|
|
|
|
if (shader->gl_handle)
|
|
{
|
|
CoglPipeline *prev = shader->compilation_pipeline;
|
|
|
|
/* XXX: currently the only things that will affect the
|
|
* boilerplate for user shaders, apart from driver features,
|
|
* are the pipeline layer-indices and texture-unit-indices
|
|
*/
|
|
if (pipeline == prev ||
|
|
_cogl_pipeline_layer_and_unit_numbers_equal (prev, pipeline))
|
|
return;
|
|
}
|
|
|
|
if (shader->gl_handle)
|
|
delete_shader (shader);
|
|
|
|
switch (shader->type)
|
|
{
|
|
case COGL_SHADER_TYPE_VERTEX:
|
|
gl_type = GL_VERTEX_SHADER;
|
|
break;
|
|
case COGL_SHADER_TYPE_FRAGMENT:
|
|
gl_type = GL_FRAGMENT_SHADER;
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
|
|
shader->gl_handle = ctx->glCreateShader (gl_type);
|
|
|
|
if ((ctx->driver == COGL_DRIVER_GL ||
|
|
ctx->driver == COGL_DRIVER_GL3 ) &&
|
|
ctx->glsl_major == 1 &&
|
|
ctx->glsl_minor >= 2)
|
|
{
|
|
version = "#version 120\n";
|
|
}
|
|
else
|
|
version = NULL;
|
|
|
|
_cogl_glsl_shader_set_source_with_boilerplate (ctx,
|
|
version,
|
|
shader->gl_handle,
|
|
gl_type,
|
|
pipeline,
|
|
1,
|
|
(const char **)
|
|
&shader->source,
|
|
NULL);
|
|
|
|
GE (ctx, glCompileShader (shader->gl_handle));
|
|
|
|
shader->compilation_pipeline = cogl_object_ref (pipeline);
|
|
|
|
GE (ctx, glGetShaderiv (shader->gl_handle, GL_COMPILE_STATUS, &status));
|
|
if (!status)
|
|
{
|
|
char buffer[512];
|
|
int len = 0;
|
|
|
|
ctx->glGetShaderInfoLog (shader->gl_handle, 511, &len, buffer);
|
|
buffer[len] = '\0';
|
|
|
|
g_warning ("Failed to compile GLSL program:\n"
|
|
"src:\n%s\n"
|
|
"error:\n%s\n",
|
|
shader->source,
|
|
buffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
char *
|
|
cogl_shader_get_info_log (CoglHandle handle)
|
|
{
|
|
if (!cogl_is_shader (handle))
|
|
return NULL;
|
|
|
|
/* XXX: This API doesn't really do anything!
|
|
*
|
|
* This API is purely for compatibility
|
|
*
|
|
* The reason we don't do anything is because a shader needs to
|
|
* be associated with a CoglPipeline for Cogl to be able to
|
|
* compile and link anything.
|
|
*
|
|
* The way this API was originally designed as a very thin wrapper
|
|
* over the GL api was a mistake and it's now very difficult to
|
|
* make the API work in a meaningful way given how the rest of Cogl
|
|
* has evolved.
|
|
*
|
|
* The CoglShader API is mostly deprecated by CoglSnippets and so
|
|
* these days we do the bare minimum to support the existing users
|
|
* of it until they are able to migrate to the snippets api.
|
|
*/
|
|
|
|
return g_strdup ("");
|
|
}
|
|
|
|
CoglShaderType
|
|
cogl_shader_get_type (CoglHandle handle)
|
|
{
|
|
CoglShader *shader;
|
|
|
|
_COGL_GET_CONTEXT (ctx, COGL_SHADER_TYPE_VERTEX);
|
|
|
|
if (!cogl_is_shader (handle))
|
|
{
|
|
g_warning ("Non shader handle type passed to cogl_shader_get_type");
|
|
return COGL_SHADER_TYPE_VERTEX;
|
|
}
|
|
|
|
shader = handle;
|
|
return shader->type;
|
|
}
|
|
|
|
CoglBool
|
|
cogl_shader_is_compiled (CoglHandle handle)
|
|
{
|
|
#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES2)
|
|
if (!cogl_is_shader (handle))
|
|
return FALSE;
|
|
|
|
/* XXX: This API doesn't really do anything!
|
|
*
|
|
* This API is purely for compatibility and blatantly lies to the
|
|
* user about whether their shader has been compiled.
|
|
*
|
|
* I suppose we could say we're stretching the definition of
|
|
* "compile" and are deferring any related errors to be "linker"
|
|
* errors.
|
|
*
|
|
* The reason we don't do anything is because a shader needs to
|
|
* be associated with a CoglPipeline for Cogl to be able to
|
|
* compile and link anything.
|
|
*
|
|
* The CoglShader API is mostly deprecated by CoglSnippets and so
|
|
* these days we do the bare minimum to support the existing users
|
|
* of it until they are able to migrate to the snippets api.
|
|
*/
|
|
|
|
return TRUE;
|
|
|
|
#else
|
|
return FALSE;
|
|
#endif
|
|
}
|