36c85da3b8
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)
383 lines
10 KiB
C
383 lines
10 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009,2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-shader-private.h"
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#include "cogl-util-gl-private.h"
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#include "cogl-context-private.h"
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#include "cogl-object-private.h"
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#include "cogl-glsl-shader-private.h"
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#include "cogl-glsl-shader-boilerplate.h"
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#include <glib.h>
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#include <string.h>
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static void _cogl_shader_free (CoglShader *shader);
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COGL_HANDLE_DEFINE (Shader, shader);
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COGL_OBJECT_DEFINE_DEPRECATED_REF_COUNTING (shader);
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#ifndef GL_FRAGMENT_SHADER
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#define GL_FRAGMENT_SHADER 0x8B30
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#endif
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#ifndef GL_VERTEX_SHADER
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#define GL_VERTEX_SHADER 0x8B31
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#endif
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static void
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_cogl_shader_free (CoglShader *shader)
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{
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/* Frees shader resources but its handle is not
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released! Do that separately before this! */
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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#ifdef HAVE_COGL_GL
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if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
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{
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if (shader->gl_handle)
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GE (ctx, glDeletePrograms (1, &shader->gl_handle));
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}
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else
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#endif
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if (shader->gl_handle)
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GE (ctx, glDeleteShader (shader->gl_handle));
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g_slice_free (CoglShader, shader);
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}
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CoglHandle
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cogl_create_shader (CoglShaderType type)
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{
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CoglShader *shader;
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_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
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switch (type)
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{
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case COGL_SHADER_TYPE_VERTEX:
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case COGL_SHADER_TYPE_FRAGMENT:
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break;
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default:
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g_warning ("Unexpected shader type (0x%08lX) given to "
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"cogl_create_shader", (unsigned long) type);
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return COGL_INVALID_HANDLE;
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}
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shader = g_slice_new (CoglShader);
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shader->language = COGL_SHADER_LANGUAGE_GLSL;
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shader->gl_handle = 0;
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shader->compilation_pipeline = NULL;
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shader->type = type;
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return _cogl_shader_handle_new (shader);
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}
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static void
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delete_shader (CoglShader *shader)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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#ifdef HAVE_COGL_GL
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if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
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{
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if (shader->gl_handle)
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GE (ctx, glDeletePrograms (1, &shader->gl_handle));
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}
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else
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#endif
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{
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if (shader->gl_handle)
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GE (ctx, glDeleteShader (shader->gl_handle));
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}
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shader->gl_handle = 0;
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if (shader->compilation_pipeline)
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{
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cogl_object_unref (shader->compilation_pipeline);
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shader->compilation_pipeline = NULL;
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}
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}
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void
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cogl_shader_source (CoglHandle handle,
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const char *source)
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{
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CoglShader *shader;
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CoglShaderLanguage language;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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if (!cogl_is_shader (handle))
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return;
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shader = handle;
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#ifdef HAVE_COGL_GL
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if (strncmp (source, "!!ARBfp1.0", 10) == 0)
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language = COGL_SHADER_LANGUAGE_ARBFP;
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else
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#endif
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language = COGL_SHADER_LANGUAGE_GLSL;
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/* Delete the old object if the language is changing... */
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if (G_UNLIKELY (language != shader->language) &&
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shader->gl_handle)
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delete_shader (shader);
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shader->source = g_strdup (source);
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shader->language = language;
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}
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void
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cogl_shader_compile (CoglHandle handle)
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{
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CoglShader *shader;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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if (!cogl_is_shader (handle))
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return;
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#ifdef HAVE_COGL_GL
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shader = handle;
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if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
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_cogl_shader_compile_real (handle, NULL);
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#endif
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/* XXX: For GLSL we don't actually compile anything until the shader
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* gets used so we have an opportunity to add some boilerplate to
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* the shader.
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*
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* At the end of the day this is obviously a badly designed API
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* given that we are having to lie to the user. It was a mistake to
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* so thinly wrap the OpenGL shader API and the current plan is to
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* replace it with a pipeline snippets API. */
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}
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void
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_cogl_shader_compile_real (CoglHandle handle,
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CoglPipeline *pipeline)
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{
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CoglShader *shader = handle;
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const char *version;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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#ifdef HAVE_COGL_GL
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if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
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{
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#ifdef COGL_GL_DEBUG
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GLenum gl_error;
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#endif
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if (shader->gl_handle)
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return;
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GE (ctx, glGenPrograms (1, &shader->gl_handle));
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GE (ctx, glBindProgram (GL_FRAGMENT_PROGRAM_ARB, shader->gl_handle));
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if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_SHOW_SOURCE)))
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g_message ("user ARBfp program:\n%s", shader->source);
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#ifdef COGL_GL_DEBUG
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while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
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;
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#endif
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ctx->glProgramString (GL_FRAGMENT_PROGRAM_ARB,
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GL_PROGRAM_FORMAT_ASCII_ARB,
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strlen (shader->source),
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shader->source);
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#ifdef COGL_GL_DEBUG
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gl_error = ctx->glGetError ();
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if (gl_error != GL_NO_ERROR)
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{
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g_warning ("%s: GL error (%d): Failed to compile ARBfp:\n%s\n%s",
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G_STRLOC,
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gl_error,
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shader->source,
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ctx->glGetString (GL_PROGRAM_ERROR_STRING_ARB));
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}
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#endif
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}
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else
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#endif
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{
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GLenum gl_type;
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GLint status;
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if (shader->gl_handle)
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{
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CoglPipeline *prev = shader->compilation_pipeline;
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/* XXX: currently the only things that will affect the
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* boilerplate for user shaders, apart from driver features,
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* are the pipeline layer-indices and texture-unit-indices
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*/
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if (pipeline == prev ||
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_cogl_pipeline_layer_and_unit_numbers_equal (prev, pipeline))
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return;
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}
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if (shader->gl_handle)
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delete_shader (shader);
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switch (shader->type)
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{
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case COGL_SHADER_TYPE_VERTEX:
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gl_type = GL_VERTEX_SHADER;
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break;
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case COGL_SHADER_TYPE_FRAGMENT:
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gl_type = GL_FRAGMENT_SHADER;
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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shader->gl_handle = ctx->glCreateShader (gl_type);
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if ((ctx->driver == COGL_DRIVER_GL ||
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ctx->driver == COGL_DRIVER_GL3 ) &&
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ctx->glsl_major == 1 &&
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ctx->glsl_minor >= 2)
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{
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version = "#version 120\n";
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}
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else
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version = NULL;
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_cogl_glsl_shader_set_source_with_boilerplate (ctx,
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version,
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shader->gl_handle,
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gl_type,
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pipeline,
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1,
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(const char **)
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&shader->source,
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NULL);
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GE (ctx, glCompileShader (shader->gl_handle));
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shader->compilation_pipeline = cogl_object_ref (pipeline);
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GE (ctx, glGetShaderiv (shader->gl_handle, GL_COMPILE_STATUS, &status));
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if (!status)
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{
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char buffer[512];
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int len = 0;
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ctx->glGetShaderInfoLog (shader->gl_handle, 511, &len, buffer);
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buffer[len] = '\0';
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g_warning ("Failed to compile GLSL program:\n"
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"src:\n%s\n"
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"error:\n%s\n",
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shader->source,
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buffer);
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}
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}
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}
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char *
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cogl_shader_get_info_log (CoglHandle handle)
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{
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if (!cogl_is_shader (handle))
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return NULL;
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/* XXX: This API doesn't really do anything!
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*
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* This API is purely for compatibility
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*
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* The reason we don't do anything is because a shader needs to
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* be associated with a CoglPipeline for Cogl to be able to
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* compile and link anything.
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*
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* The way this API was originally designed as a very thin wrapper
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* over the GL api was a mistake and it's now very difficult to
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* make the API work in a meaningful way given how the rest of Cogl
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* has evolved.
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*
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* The CoglShader API is mostly deprecated by CoglSnippets and so
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* these days we do the bare minimum to support the existing users
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* of it until they are able to migrate to the snippets api.
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*/
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return g_strdup ("");
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}
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CoglShaderType
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cogl_shader_get_type (CoglHandle handle)
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{
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CoglShader *shader;
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_COGL_GET_CONTEXT (ctx, COGL_SHADER_TYPE_VERTEX);
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if (!cogl_is_shader (handle))
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{
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g_warning ("Non shader handle type passed to cogl_shader_get_type");
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return COGL_SHADER_TYPE_VERTEX;
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}
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shader = handle;
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return shader->type;
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}
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CoglBool
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cogl_shader_is_compiled (CoglHandle handle)
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{
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#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES2)
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if (!cogl_is_shader (handle))
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return FALSE;
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/* XXX: This API doesn't really do anything!
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*
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* This API is purely for compatibility and blatantly lies to the
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* user about whether their shader has been compiled.
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*
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* I suppose we could say we're stretching the definition of
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* "compile" and are deferring any related errors to be "linker"
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* errors.
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*
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* The reason we don't do anything is because a shader needs to
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* be associated with a CoglPipeline for Cogl to be able to
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* compile and link anything.
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*
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* The CoglShader API is mostly deprecated by CoglSnippets and so
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* these days we do the bare minimum to support the existing users
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* of it until they are able to migrate to the snippets api.
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*/
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return TRUE;
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#else
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return FALSE;
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#endif
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}
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