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
34static void
35insert_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
42void
43sp_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