8f3380adc3
This adds a new "fixed-arbfp" progend so we now have 3 distinct ways of
setting up the state of a pipeline:
» fixed; where the vertex and fragment processing are implemented
using fixed function opengl apis.
» fixed-arbfp; where vertex processing is implemented using fixed
function opengl apis but fragment processing is implemented
using the ARB Fragment Processing language.
» glsl; there vertex and fragment processing are both implemented
using glsl.
This means we avoid unusual, combinations such as glsl for vertex
processing and arbfp for fragment processing, and also avoid pairing
fixed-function vertex processing with glsl fragment processing which we
happen to know hits some awkward code paths in Mesa that lead to poor
performance.
As part of this change, the progend now implies specific vertend and
fragend choices so instead of associating a vertend and fragend with a
pipeline we now just associate a progend choice.
When flushing a pipeline and choosing what progend to use, we now call a
progend->start() method that is able to determine if the vertend and
fragend together will be able to handle the given pipeline so the
vertend and fragend ->start() methods no longer need to return a boolean
status.
Since we now don't need to support glsl used in conjunction with fixed
function this will allow us to avoid ever using OpenGL builtin attribute
names, though this patch doesn't change that yet.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit cec381f50c7a2f2186bd4a8c5f38fecd5f099075)
102 lines
3.0 KiB
C
102 lines
3.0 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) 2011 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
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* <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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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 <string.h>
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#include "cogl-pipeline-private.h"
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#include "cogl-pipeline-state-private.h"
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#ifdef COGL_PIPELINE_PROGEND_FIXED
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#include "cogl-context.h"
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#include "cogl-context-private.h"
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#include "cogl-framebuffer-private.h"
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static CoglBool
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_cogl_pipeline_progend_fixed_start (CoglPipeline *pipeline)
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{
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_COGL_GET_CONTEXT (ctx, FALSE);
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if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_FIXED)))
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return FALSE;
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if (ctx->driver == COGL_DRIVER_GLES2)
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return FALSE;
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/* Vertex snippets are only supported in the GLSL fragend */
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if (_cogl_pipeline_has_vertex_snippets (pipeline))
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return FALSE;
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/* Fragment snippets are only supported in the GLSL fragend */
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if (_cogl_pipeline_has_fragment_snippets (pipeline))
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return FALSE;
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/* If there is a user program then the appropriate backend for that
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* language should handle it. */
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if (cogl_pipeline_get_user_program (pipeline))
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return FALSE;
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return TRUE;
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}
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static void
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_cogl_pipeline_progend_fixed_pre_paint (CoglPipeline *pipeline,
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CoglFramebuffer *framebuffer)
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{
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CoglContext *ctx = framebuffer->context;
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if (ctx->current_projection_entry)
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_cogl_matrix_entry_flush_to_gl_builtins (ctx,
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ctx->current_projection_entry,
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COGL_MATRIX_PROJECTION,
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framebuffer,
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FALSE /* enable flip */);
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if (ctx->current_modelview_entry)
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_cogl_matrix_entry_flush_to_gl_builtins (ctx,
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ctx->current_modelview_entry,
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COGL_MATRIX_MODELVIEW,
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framebuffer,
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FALSE /* enable flip */);
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}
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const CoglPipelineProgend _cogl_pipeline_fixed_progend =
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{
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COGL_PIPELINE_VERTEND_FIXED,
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COGL_PIPELINE_FRAGEND_FIXED,
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_cogl_pipeline_progend_fixed_start,
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NULL, /* end */
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NULL, /* pre_change_notify */
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NULL, /* layer_pre_change_notify */
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_cogl_pipeline_progend_fixed_pre_paint
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};
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#endif /* COGL_PIPELINE_PROGEND_FIXED */
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