src/gallium/drivers/softpipe/sp_quad_pipe.c

   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 static void
  34 sp_push_quad_first(
  35    struct softpipe_context *sp,
  36    struct quad_stage *quad,
  37    uint i )
  38 {
  39    quad->next = sp->quad[i].first;
  40    sp->quad[i].first = quad;
  41 }
  42
  43 static void
  44 sp_build_depth_stencil(
  45    struct softpipe_context *sp,
  46    uint i )
  47 {
  48    if (sp->depth_stencil->stencil[0].enabled ||
  49        sp->depth_stencil->stencil[1].enabled) {
  50       sp_push_quad_first( sp, sp->quad[i].stencil_test, i );
  51    }
  52    else if (sp->depth_stencil->depth.enabled &&
  53             sp->framebuffer.zsbuf) {
  54       sp_push_quad_first( sp, sp->quad[i].depth_test, i );
  55    }
  56 }
  57
  58 void
  59 sp_build_quad_pipeline(struct softpipe_context *sp)
  60 {
  61    uint i;
  62
  63    boolean early_depth_test =
  64                sp->depth_stencil->depth.enabled &&
  65                sp->framebuffer.zsbuf &&
  66                !sp->depth_stencil->alpha.enabled &&
  67                !sp->fs->info.uses_kill &&
  68                !sp->fs->info.writes_z;
  69
  70    /* build up the pipeline in reverse order... */
  71    for (i = 0; i < SP_NUM_QUAD_THREADS; i++) {
  72       sp->quad[i].first = sp->quad[i].output;
  73
  74       if (sp->blend->colormask != 0xf) {
  75          sp_push_quad_first( sp, sp->quad[i].colormask, i );
  76       }
  77
  78       if (sp->blend->blend_enable ||
  79           sp->blend->logicop_enable) {
  80          sp_push_quad_first( sp, sp->quad[i].blend, i );
  81       }
  82
  83       if (sp->depth_stencil->depth.occlusion_count) {
  84          sp_push_quad_first( sp, sp->quad[i].occlusion, i );
  85       }
  86
  87       if (sp->rasterizer->poly_smooth ||
  88           sp->rasterizer->line_smooth ||
  89           sp->rasterizer->point_smooth) {
  90          sp_push_quad_first( sp, sp->quad[i].coverage, i );
  91       }
  92
  93       if (!early_depth_test) {
  94          sp_build_depth_stencil( sp, i );
  95       }
  96
  97       if (sp->depth_stencil->alpha.enabled) {
  98          sp_push_quad_first( sp, sp->quad[i].alpha_test, i );
  99       }
 100
 101       /* XXX always enable shader? */
 102       if (1) {
 103          sp_push_quad_first( sp, sp->quad[i].shade, i );
 104       }
 105
 106       if (early_depth_test) {
 107          sp_build_depth_stencil( sp, i );
 108          sp_push_quad_first( sp, sp->quad[i].earlyz, i );
 109       }
 110
 111 #if !USE_DRAW_STAGE_PSTIPPLE
 112       if (sp->rasterizer->poly_stipple_enable) {
 113          sp_push_quad_first( sp, sp->quad[i].polygon_stipple, i );
 114       }
 115 #endif
 116    }
 117 }
 118