mirror of
https://github.com/brl/mutter.git
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acc44161c1
As part of an effort to improve the architecture of CoglMaterial internally this overhauls how we flush layer state to OpenGL by adding a formal backend abstraction for fragment processing and further formalizing the CoglTextureUnit abstraction. There are three backends: "glsl", "arbfp" and "fixed". The fixed backend uses the OpenGL fixed function APIs to setup the fragment processing, the arbfp backend uses code generation to handle fragment processing using an ARBfp program, and the GLSL backend is currently only there as a formality to handle user programs associated with a material. (i.e. the glsl backend doesn't yet support code generation) The GLSL backend has highest precedence, then arbfp and finally the fixed. If a backend can't support some particular CoglMaterial feature then it will fallback to the next backend. This adds three new COGL_DEBUG options: * "disable-texturing" as expected should disable all texturing * "disable-arbfp" always make the arbfp backend fallback * "disable-glsl" always make the glsl backend fallback * "show-source" show code generated by the arbfp/glsl backends
292 lines
7.7 KiB
C
292 lines
7.7 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) 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.h"
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#include "cogl-program.h"
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#include "cogl-shader-private.h"
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#include "cogl-internal.h"
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#include "cogl-handle.h"
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#include "cogl-context.h"
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#include "cogl-journal-private.h"
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#include <glib.h>
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#define glCreateProgram ctx->drv.pf_glCreateProgram
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#define glAttachShader ctx->drv.pf_glAttachShader
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#define glUseProgram ctx->drv.pf_glUseProgram
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#define glLinkProgram ctx->drv.pf_glLinkProgram
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#define glGetUniformLocation ctx->drv.pf_glGetUniformLocation
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#define glUniform1f ctx->drv.pf_glUniform1f
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#define glUniform2f ctx->drv.pf_glUniform2f
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#define glUniform3f ctx->drv.pf_glUniform3f
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#define glUniform4f ctx->drv.pf_glUniform4f
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#define glUniform1fv ctx->drv.pf_glUniform1fv
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#define glUniform2fv ctx->drv.pf_glUniform2fv
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#define glUniform3fv ctx->drv.pf_glUniform3fv
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#define glUniform4fv ctx->drv.pf_glUniform4fv
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#define glUniform1i ctx->drv.pf_glUniform1i
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#define glUniform2i ctx->drv.pf_glUniform2i
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#define glUniform3i ctx->drv.pf_glUniform3i
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#define glUniform4i ctx->drv.pf_glUniform4i
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#define glUniform1iv ctx->drv.pf_glUniform1iv
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#define glUniform2iv ctx->drv.pf_glUniform2iv
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#define glUniform3iv ctx->drv.pf_glUniform3iv
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#define glUniform4iv ctx->drv.pf_glUniform4iv
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#define glUniformMatrix2fv ctx->drv.pf_glUniformMatrix2fv
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#define glUniformMatrix3fv ctx->drv.pf_glUniformMatrix3fv
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#define glUniformMatrix4fv ctx->drv.pf_glUniformMatrix4fv
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#define glDeleteProgram ctx->drv.pf_glDeleteProgram
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static void _cogl_program_free (CoglProgram *program);
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COGL_HANDLE_DEFINE (Program, program);
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static void
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_cogl_program_free (CoglProgram *program)
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{
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/* Frees program 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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GE (glDeleteProgram (program->gl_handle));
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}
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CoglHandle
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cogl_create_program (void)
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{
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CoglProgram *program;
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_COGL_GET_CONTEXT (ctx, NULL);
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program = g_slice_new (CoglProgram);
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program->gl_handle = glCreateProgram ();
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return _cogl_program_handle_new (program);
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}
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void
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cogl_program_attach_shader (CoglHandle program_handle,
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CoglHandle shader_handle)
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{
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CoglProgram *program;
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CoglShader *shader;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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if (!cogl_is_program (program_handle) || !cogl_is_shader (shader_handle))
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return;
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program = _cogl_program_pointer_from_handle (program_handle);
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shader = _cogl_shader_pointer_from_handle (shader_handle);
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GE (glAttachShader (program->gl_handle, shader->gl_handle));
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}
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void
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cogl_program_link (CoglHandle handle)
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{
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CoglProgram *program;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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if (!cogl_is_program (handle))
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return;
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program = _cogl_program_pointer_from_handle (handle);
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GE (glLinkProgram (program->gl_handle));
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}
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void
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cogl_program_use (CoglHandle handle)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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g_return_if_fail (handle == COGL_INVALID_HANDLE ||
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cogl_is_program (handle));
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if (ctx->current_program == 0 && handle != 0)
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ctx->legacy_state_set++;
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else if (handle == 0 && ctx->current_program != 0)
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ctx->legacy_state_set--;
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if (handle != COGL_INVALID_HANDLE)
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cogl_handle_ref (handle);
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if (ctx->current_program != COGL_INVALID_HANDLE)
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cogl_handle_unref (ctx->current_program);
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ctx->current_program = handle;
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}
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int
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cogl_program_get_uniform_location (CoglHandle handle,
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const char *uniform_name)
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{
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CoglProgram *program;
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_COGL_GET_CONTEXT (ctx, 0);
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if (!cogl_is_program (handle))
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return 0;
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program = _cogl_program_pointer_from_handle (handle);
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return glGetUniformLocation (program->gl_handle, uniform_name);
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}
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void
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cogl_program_uniform_1f (int uniform_no,
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float value)
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{
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CoglProgram *program;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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program = ctx->current_program;
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g_return_if_fail (program != NULL);
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_cogl_gl_use_program_wrapper (program->gl_handle);
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GE (glUniform1f (uniform_no, value));
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}
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void
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cogl_program_uniform_1i (int uniform_no,
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int value)
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{
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CoglProgram *program;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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program = ctx->current_program;
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g_return_if_fail (program != NULL);
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_cogl_gl_use_program_wrapper (program->gl_handle);
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GE (glUniform1i (uniform_no, value));
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}
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void
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cogl_program_uniform_float (int uniform_no,
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int size,
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int count,
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const GLfloat *value)
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{
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CoglProgram *program;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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program = ctx->current_program;
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g_return_if_fail (program != NULL);
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_cogl_gl_use_program_wrapper (program->gl_handle);
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switch (size)
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{
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case 1:
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GE (glUniform1fv (uniform_no, count, value));
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break;
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case 2:
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GE (glUniform2fv (uniform_no, count, value));
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break;
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case 3:
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GE (glUniform3fv (uniform_no, count, value));
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break;
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case 4:
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GE (glUniform4fv (uniform_no, count, value));
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break;
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default:
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g_warning ("%s called with invalid size parameter", G_STRFUNC);
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}
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}
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void
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cogl_program_uniform_int (int uniform_no,
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int size,
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int count,
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const int *value)
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{
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CoglProgram *program;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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program = ctx->current_program;
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g_return_if_fail (program != NULL);
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_cogl_gl_use_program_wrapper (program->gl_handle);
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switch (size)
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{
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case 1:
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glUniform1iv (uniform_no, count, value);
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break;
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case 2:
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glUniform2iv (uniform_no, count, value);
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break;
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case 3:
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glUniform3iv (uniform_no, count, value);
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break;
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case 4:
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glUniform4iv (uniform_no, count, value);
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break;
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default:
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g_warning ("%s called with invalid size parameter", G_STRFUNC);
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}
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}
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void
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cogl_program_uniform_matrix (int uniform_no,
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int size,
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int count,
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gboolean transpose,
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const GLfloat *value)
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{
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CoglProgram *program;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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program = ctx->current_program;
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g_return_if_fail (program != NULL);
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_cogl_gl_use_program_wrapper (program->gl_handle);
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switch (size)
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{
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case 2 :
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GE (glUniformMatrix2fv (uniform_no, count, transpose, value));
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break;
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case 3 :
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GE (glUniformMatrix3fv (uniform_no, count, transpose, value));
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break;
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case 4 :
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GE (glUniformMatrix4fv (uniform_no, count, transpose, value));
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break;
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default :
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g_warning ("%s called with invalid size parameter", G_STRFUNC);
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}
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}
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