lp_clear.c revision 946f432a08112148d743eb9faf6b27bb8cc7fa76 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 * Copyright 2009 VMware, Inc.  All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28
29/* Author:
30 *    Brian Paul
31 *    Michel Dänzer
32 */
33
34
35#include "pipe/p_defines.h"
36#include "util/u_pack_color.h"
37#include "lp_clear.h"
38#include "lp_context.h"
39#include "lp_surface.h"
40#include "lp_state.h"
41#include "lp_tile_cache.h"
42
43
44/**
45 * Clear the given buffers to the specified values.
46 * No masking, no scissor (clear entire buffer).
47 */
48void
49llvmpipe_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba,
50               double depth, unsigned stencil)
51{
52   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
53   unsigned cv;
54   uint i;
55
56   if (llvmpipe->no_rast)
57      return;
58
59#if 0
60   llvmpipe_update_derived(llvmpipe); /* not needed?? */
61#endif
62
63   if (buffers & PIPE_CLEAR_COLOR) {
64      for (i = 0; i < llvmpipe->framebuffer.nr_cbufs; i++) {
65         struct pipe_surface *ps = llvmpipe->framebuffer.cbufs[i];
66
67         util_pack_color(rgba, ps->format, &cv);
68         lp_tile_cache_clear(llvmpipe->cbuf_cache[i], rgba, cv);
69
70#if !TILE_CLEAR_OPTIMIZATION
71         /* non-cached surface */
72         pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height, cv);
73#endif
74      }
75   }
76
77   if (buffers & PIPE_CLEAR_DEPTHSTENCIL) {
78      static const float zero[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
79      struct pipe_surface *ps = llvmpipe->framebuffer.zsbuf;
80
81      cv = util_pack_z_stencil(ps->format, depth, stencil);
82      lp_tile_cache_clear(llvmpipe->zsbuf_cache, zero, cv);
83
84#if !TILE_CLEAR_OPTIMIZATION
85      /* non-cached surface */
86      pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height, cv);
87#endif
88      }
89}
90