mutter/cogl/cogl-pipeline-vertend-fixed.c

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 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/>.
*
*
*
* 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_FIXED
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include "cogl-program-private.h"
const CoglPipelineVertend _cogl_pipeline_fixed_vertend;
static gboolean
_cogl_pipeline_vertend_fixed_start (CoglPipeline *pipeline,
int n_layers,
unsigned long pipelines_difference)
{
CoglProgram *user_program;
if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_FIXED)))
return FALSE;
/* If there is a user program with a vertex shader then the
appropriate backend for that language should handle it. We can
still use the fixed vertex backend if the program only contains
a fragment shader */
user_program = cogl_pipeline_get_user_program (pipeline);
if (user_program != COGL_INVALID_HANDLE &&
_cogl_program_has_vertex_shader (user_program))
return FALSE;
_cogl_use_vertex_program (0, COGL_PIPELINE_PROGRAM_TYPE_FIXED);
return TRUE;
}
static gboolean
_cogl_pipeline_vertend_fixed_add_layer (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
unsigned long layers_difference)
{
int unit_index = _cogl_pipeline_layer_get_unit_index (layer);
CoglTextureUnit *unit = _cogl_get_texture_unit (unit_index);
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);
_cogl_matrix_stack_set (unit->matrix_stack,
&authority->big_state->matrix);
_cogl_matrix_stack_flush_to_gl (unit->matrix_stack, COGL_MATRIX_TEXTURE);
}
return TRUE;
}
static gboolean
_cogl_pipeline_vertend_fixed_end (CoglPipeline *pipeline,
unsigned long pipelines_difference)
{
_COGL_GET_CONTEXT (ctx, FALSE);
if (pipelines_difference & COGL_PIPELINE_STATE_POINT_SIZE)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_POINT_SIZE);
if (ctx->point_size_cache != authority->big_state->point_size)
{
GE( glPointSize (authority->big_state->point_size) );
ctx->point_size_cache = authority->big_state->point_size;
}
}
return TRUE;
}
const CoglPipelineVertend _cogl_pipeline_fixed_vertend =
{
_cogl_pipeline_vertend_fixed_start,
_cogl_pipeline_vertend_fixed_add_layer,
_cogl_pipeline_vertend_fixed_end,
NULL, /* pipeline_change_notify */
NULL /* layer_change_notify */
};
#endif /* COGL_PIPELINE_VERTEND_FIXED */