048ac5b968b315e4d7692602b40beab37aa59150
[mesa.git] / src / gallium / drivers / llvmpipe / lp_state_surface.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 /* Authors: Keith Whitwell <keith@tungstengraphics.com>
29 */
30
31 #include "pipe/p_state.h"
32 #include "util/u_inlines.h"
33 #include "util/u_surface.h"
34 #include "lp_context.h"
35 #include "lp_state.h"
36 #include "lp_setup.h"
37
38 #include "draw/draw_context.h"
39
40 #include "util/u_format.h"
41
42
43 /**
44 * Set the framebuffer surface info: color buffers, zbuffer, stencil buffer.
45 */
46 void
47 llvmpipe_set_framebuffer_state(struct pipe_context *pipe,
48 const struct pipe_framebuffer_state *fb)
49 {
50 struct llvmpipe_context *lp = llvmpipe_context(pipe);
51
52 boolean changed = !util_framebuffer_state_equal(&lp->framebuffer, fb);
53
54 if (changed) {
55
56 util_copy_framebuffer_state(&lp->framebuffer, fb);
57
58 /* Tell draw module how deep the Z/depth buffer is */
59 if (lp->framebuffer.zsbuf) {
60 int depth_bits;
61 double mrd;
62 depth_bits = util_format_get_component_bits(lp->framebuffer.zsbuf->format,
63 UTIL_FORMAT_COLORSPACE_ZS,
64 0);
65 if (depth_bits > 16) {
66 mrd = 0.0000001;
67 }
68 else {
69 mrd = 0.00002;
70 }
71 draw_set_mrd(lp->draw, mrd);
72 }
73
74 lp_setup_bind_framebuffer( lp->setup, &lp->framebuffer );
75
76 lp->dirty |= LP_NEW_FRAMEBUFFER;
77 }
78 }