493eab7679
ARB_shader_image_load_store adds support for explicit early depth testing. However we need to make sure we don't overwrite values using the shader written values in this case. This fixes early depth testing in softpipe to conform with those requirements. Reviewed-by: Brian Paul <brianp@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/**************************************************************************
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*
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* Copyright 2007 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "sp_context.h"
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#include "sp_state.h"
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#include "pipe/p_shader_tokens.h"
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static void
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insert_stage_at_head(struct softpipe_context *sp, struct quad_stage *quad)
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{
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quad->next = sp->quad.first;
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sp->quad.first = quad;
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}
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void
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sp_build_quad_pipeline(struct softpipe_context *sp)
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{
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boolean early_depth_test =
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(sp->depth_stencil->depth.enabled &&
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sp->framebuffer.zsbuf &&
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!sp->depth_stencil->alpha.enabled &&
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!sp->fs_variant->info.uses_kill &&
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!sp->fs_variant->info.writes_z &&
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!sp->fs_variant->info.writes_stencil) ||
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sp->fs_variant->info.properties[TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL];
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sp->quad.first = sp->quad.blend;
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sp->early_depth = early_depth_test;
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if (early_depth_test) {
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insert_stage_at_head( sp, sp->quad.shade );
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insert_stage_at_head( sp, sp->quad.depth_test );
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}
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else {
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insert_stage_at_head( sp, sp->quad.depth_test );
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insert_stage_at_head( sp, sp->quad.shade );
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}
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#if !DO_PSTIPPLE_IN_DRAW_MODULE && !DO_PSTIPPLE_IN_HELPER_MODULE
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if (sp->rasterizer->poly_stipple_enable)
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insert_stage_at_head( sp, sp->quad.pstipple );
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#endif
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}
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