1 /**********************************************************
2 * Copyright 2008-2009 VMware, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26 #include "util/u_inlines.h"
27 #include "pipe/p_defines.h"
28 #include "util/u_math.h"
29 #include "tgsi/tgsi_parse.h"
30
31 #include "svga_context.h"
32 #include "svga_resource_buffer.h"
33
34 /***********************************************************************
35 * Constant buffers
36 */
37
38 struct svga_constbuf
39 {
40 unsigned type;
41 float (*data)[4];
42 unsigned count;
43 };
44
45
46
svga_set_constant_buffer(struct pipe_context * pipe,uint shader,uint index,const struct pipe_constant_buffer * cb)47 static void svga_set_constant_buffer(struct pipe_context *pipe,
48 uint shader, uint index,
49 const struct pipe_constant_buffer *cb)
50 {
51 struct svga_screen *svgascreen = svga_screen(pipe->screen);
52 struct svga_context *svga = svga_context(pipe);
53 struct pipe_resource *buf = cb ? cb->buffer : NULL;
54 unsigned buffer_size = 0;
55
56 if (cb) {
57 buffer_size = cb->buffer_size;
58 if (cb->user_buffer) {
59 buf = svga_user_buffer_create(pipe->screen,
60 (void *) cb->user_buffer,
61 cb->buffer_size,
62 PIPE_BIND_CONSTANT_BUFFER);
63 }
64 }
65
66 assert(shader < PIPE_SHADER_TYPES);
67 assert(index < ARRAY_SIZE(svga->curr.constbufs[shader]));
68 assert(index < svgascreen->max_const_buffers);
69 (void) svgascreen;
70
71 pipe_resource_reference(&svga->curr.constbufs[shader][index].buffer, buf);
72
73 /* Make sure the constant buffer size to be updated is within the
74 * limit supported by the device.
75 */
76 svga->curr.constbufs[shader][index].buffer_size =
77 MIN2(buffer_size, SVGA_MAX_CONST_BUF_SIZE);
78
79 svga->curr.constbufs[shader][index].buffer_offset = cb ? cb->buffer_offset : 0;
80 svga->curr.constbufs[shader][index].user_buffer = NULL; /* not used */
81
82 if (shader == PIPE_SHADER_FRAGMENT)
83 svga->dirty |= SVGA_NEW_FS_CONST_BUFFER;
84 else if (shader == PIPE_SHADER_VERTEX)
85 svga->dirty |= SVGA_NEW_VS_CONST_BUFFER;
86 else
87 svga->dirty |= SVGA_NEW_GS_CONST_BUFFER;
88
89 /* update bitmask of dirty const buffers */
90 svga->state.dirty_constbufs[shader] |= (1 << index);
91
92 if (cb && cb->user_buffer) {
93 pipe_resource_reference(&buf, NULL);
94 }
95 }
96
97
98
svga_init_constbuffer_functions(struct svga_context * svga)99 void svga_init_constbuffer_functions( struct svga_context *svga )
100 {
101 svga->pipe.set_constant_buffer = svga_set_constant_buffer;
102 }
103
104