dbff3a357e
This adds an internal function to set the backface culling state on a pipeline. This includes properties to set the culling mode (front, back or both) and also to set which face is considered the front (COGL_WINDING_CLOCKWISE or COGL_WINDING_COUNTER_CLOCKWISE). The actual front face flushed to GL depends on whether we are rendering to an offscreen buffer or not. This means that when changing between on- and off- screen framebuffers it now checks whether the last flushed pipeline has backface culling enabled and forces a reflush of the cull face state if so. The backface culling is now set on a pipeline as part of the legacy state. This is important because some code in Cogl assumes it can flush a temporary pipeline to revert to a known state, but previously this wouldn't disable backface culling so things such as flushing the clip stack could get confused. Reviewed-by: Robert Bragg <robert@linux.intel.com>
143 lines
4.6 KiB
C
143 lines
4.6 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
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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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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifndef __COGL_PIPELINE_STATE_PRIVATE_H
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#define __COGL_PIPELINE_STATE_PRIVATE_H
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CoglPipeline *
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_cogl_pipeline_get_user_program (CoglPipeline *pipeline);
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void
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_cogl_pipeline_set_fog_state (CoglPipeline *pipeline,
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const CoglPipelineFogState *fog_state);
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void
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_cogl_pipeline_set_cull_face_state (CoglPipeline *pipeline,
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const CoglPipelineCullFaceState *
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cull_face_state);
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CoglPipelineCullFaceMode
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_cogl_pipeline_get_cull_face_mode (CoglPipeline *pipeline);
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gboolean
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_cogl_pipeline_color_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_lighting_state_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_alpha_func_state_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_alpha_func_reference_state_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_blend_state_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_depth_state_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_fog_state_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_point_size_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_logic_ops_state_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_user_shader_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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gboolean
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_cogl_pipeline_cull_face_state_equal (CoglPipeline *authority0,
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CoglPipeline *authority1);
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void
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_cogl_pipeline_hash_color_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_blend_enable_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_layers_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_lighting_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_alpha_func_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_alpha_func_reference_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_blend_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_user_shader_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_depth_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_fog_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_point_size_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_logic_ops_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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void
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_cogl_pipeline_hash_cull_face_state (CoglPipeline *authority,
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CoglPipelineHashState *state);
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#endif /* __COGL_PIPELINE_STATE_PRIVATE_H */
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