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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 VMware, Inc.
      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 VMWARE 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       sp->fs_variant->info.properties[TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL];
     53 
     54    sp->quad.first = sp->quad.blend;
     55 
     56    sp->early_depth = early_depth_test;
     57    if (early_depth_test) {
     58       insert_stage_at_head( sp, sp->quad.shade );
     59       insert_stage_at_head( sp, sp->quad.depth_test );
     60    }
     61    else {
     62       insert_stage_at_head( sp, sp->quad.depth_test );
     63       insert_stage_at_head( sp, sp->quad.shade );
     64    }
     65 
     66 #if !DO_PSTIPPLE_IN_DRAW_MODULE && !DO_PSTIPPLE_IN_HELPER_MODULE
     67    if (sp->rasterizer->poly_stipple_enable)
     68       insert_stage_at_head( sp, sp->quad.pstipple );
     69 #endif
     70 }
     71 
     72