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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
  4.  * All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the
  8.  * "Software"), to deal in the Software without restriction, including
  9.  * without limitation the rights to use, copy, modify, merge, publish,
  10.  * distribute, sub license, and/or sell copies of the Software, and to
  11.  * permit persons to whom the Software is furnished to do so, subject to
  12.  * the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice (including the
  15.  * next paragraph) shall be included in all copies or substantial portions
  16.  * of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21.  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  *
  26.  **************************************************************************/
  27.  
  28.  
  29. #include "sp_context.h"
  30. #include "sp_state.h"
  31. #include "pipe/p_shader_tokens.h"
  32.  
  33.  
  34. static void
  35. insert_stage_at_head(struct softpipe_context *sp, struct quad_stage *quad)
  36. {
  37.    quad->next = sp->quad.first;
  38.    sp->quad.first = quad;
  39. }
  40.  
  41.  
  42. void
  43. sp_build_quad_pipeline(struct softpipe_context *sp)
  44. {
  45.    boolean early_depth_test =
  46.       sp->depth_stencil->depth.enabled &&
  47.       sp->framebuffer.zsbuf &&
  48.       !sp->depth_stencil->alpha.enabled &&
  49.       !sp->fs_variant->info.uses_kill &&
  50.       !sp->fs_variant->info.writes_z &&
  51.       !sp->fs_variant->info.writes_stencil;
  52.  
  53.    sp->quad.first = sp->quad.blend;
  54.  
  55.    if (early_depth_test) {
  56.       insert_stage_at_head( sp, sp->quad.shade );
  57.       insert_stage_at_head( sp, sp->quad.depth_test );
  58.    }
  59.    else {
  60.       insert_stage_at_head( sp, sp->quad.depth_test );
  61.       insert_stage_at_head( sp, sp->quad.shade );
  62.    }
  63.  
  64. #if !DO_PSTIPPLE_IN_DRAW_MODULE && !DO_PSTIPPLE_IN_HELPER_MODULE
  65.    if (sp->rasterizer->poly_stipple_enable)
  66.       insert_stage_at_head( sp, sp->quad.pstipple );
  67. #endif
  68. }
  69.  
  70.