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 /* Authors: Keith Whitwell <keithw@vmware.com>
29 */
30
31 #include "pipe/p_state.h"
32 #include "util/u_inlines.h"
33 #include "util/u_framebuffer.h"
34 #include "util/u_surface.h"
35 #include "lp_context.h"
36 #include "lp_scene.h"
37 #include "lp_state.h"
38 #include "lp_setup.h"
39
40 #include "draw/draw_context.h"
41
42 #include "util/u_format.h"
43
44
45 /**
46 * Set the framebuffer surface info: color buffers, zbuffer, stencil buffer.
47 */
48 void
llvmpipe_set_framebuffer_state(struct pipe_context * pipe,const struct pipe_framebuffer_state * fb)49 llvmpipe_set_framebuffer_state(struct pipe_context *pipe,
50 const struct pipe_framebuffer_state *fb)
51 {
52 struct llvmpipe_context *lp = llvmpipe_context(pipe);
53
54 boolean changed = !util_framebuffer_state_equal(&lp->framebuffer, fb);
55 unsigned i;
56
57 assert(fb->width <= LP_MAX_WIDTH);
58 assert(fb->height <= LP_MAX_HEIGHT);
59
60 if (changed) {
61 /*
62 * If no depth buffer is bound, send the utility function the default
63 * format for no bound depth (PIPE_FORMAT_NONE).
64 */
65 enum pipe_format depth_format = fb->zsbuf ?
66 fb->zsbuf->format : PIPE_FORMAT_NONE;
67 const struct util_format_description *depth_desc =
68 util_format_description(depth_format);
69
70 if (lp->framebuffer.zsbuf && lp->framebuffer.zsbuf->context != pipe) {
71 debug_printf("Illegal setting of fb state with zsbuf created in "
72 "another context\n");
73 }
74 for (i = 0; i < fb->nr_cbufs; i++) {
75 if (lp->framebuffer.cbufs[i] &&
76 lp->framebuffer.cbufs[i]->context != pipe) {
77 debug_printf("Illegal setting of fb state with cbuf %d created in "
78 "another context\n", i);
79 }
80 }
81
82 util_copy_framebuffer_state(&lp->framebuffer, fb);
83
84 if (LP_PERF & PERF_NO_DEPTH) {
85 pipe_surface_reference(&lp->framebuffer.zsbuf, NULL);
86 }
87
88 /*
89 * Calculate the floating point depth sense and Minimum Resolvable Depth
90 * value for the llvmpipe module. This is separate from the draw module.
91 */
92 lp->floating_point_depth =
93 (util_get_depth_format_type(depth_desc) == UTIL_FORMAT_TYPE_FLOAT);
94
95 lp->mrd = util_get_depth_format_mrd(depth_desc);
96
97 /* Tell the draw module how deep the Z/depth buffer is. */
98 draw_set_zs_format(lp->draw, depth_format);
99
100 lp_setup_bind_framebuffer( lp->setup, &lp->framebuffer );
101
102 lp->dirty |= LP_NEW_FRAMEBUFFER;
103 }
104 }
105