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