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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 struct svga_constbuf
36 {
37    unsigned type;
38    float (*data)[4];
39    unsigned count;
40 };
41 
42 
43 
44 static void
svga_set_constant_buffer(struct pipe_context * pipe,enum pipe_shader_type shader,uint index,const struct pipe_constant_buffer * cb)45 svga_set_constant_buffer(struct pipe_context *pipe,
46                          enum pipe_shader_type shader, uint index,
47                          const struct pipe_constant_buffer *cb)
48 {
49    struct svga_screen *svgascreen = svga_screen(pipe->screen);
50    struct svga_context *svga = svga_context(pipe);
51    struct pipe_resource *buf = cb ? cb->buffer : NULL;
52    unsigned buffer_size = 0;
53 
54    if (cb) {
55       buffer_size = cb->buffer_size;
56       if (cb->user_buffer) {
57          buf = svga_user_buffer_create(pipe->screen,
58                                        (void *) cb->user_buffer,
59                                        cb->buffer_size,
60                                        PIPE_BIND_CONSTANT_BUFFER);
61       }
62    }
63 
64    assert(shader < PIPE_SHADER_TYPES);
65    assert(index < ARRAY_SIZE(svga->curr.constbufs[shader]));
66    assert(index < svgascreen->max_const_buffers);
67    (void) svgascreen;
68 
69    pipe_resource_reference(&svga->curr.constbufs[shader][index].buffer, buf);
70 
71    /* Make sure the constant buffer size to be updated is within the
72     * limit supported by the device.
73     */
74    svga->curr.constbufs[shader][index].buffer_size =
75       MIN2(buffer_size, SVGA_MAX_CONST_BUF_SIZE);
76 
77    svga->curr.constbufs[shader][index].buffer_offset = cb ? cb->buffer_offset : 0;
78    svga->curr.constbufs[shader][index].user_buffer = NULL; /* not used */
79 
80    if (index == 0) {
81       if (shader == PIPE_SHADER_FRAGMENT)
82          svga->dirty |= SVGA_NEW_FS_CONSTS;
83       else if (shader == PIPE_SHADER_VERTEX)
84          svga->dirty |= SVGA_NEW_VS_CONSTS;
85       else if (shader == PIPE_SHADER_GEOMETRY)
86          svga->dirty |= SVGA_NEW_GS_CONSTS;
87       else if (shader == PIPE_SHADER_TESS_CTRL)
88          svga->dirty |= SVGA_NEW_TCS_CONSTS;
89       else if (shader == PIPE_SHADER_TESS_EVAL)
90          svga->dirty |= SVGA_NEW_TES_CONSTS;
91    } else {
92       if (shader == PIPE_SHADER_FRAGMENT)
93          svga->dirty |= SVGA_NEW_FS_CONST_BUFFER;
94       else if (shader == PIPE_SHADER_VERTEX)
95          svga->dirty |= SVGA_NEW_VS_CONST_BUFFER;
96       else if (shader == PIPE_SHADER_GEOMETRY)
97          svga->dirty |= SVGA_NEW_GS_CONST_BUFFER;
98       else if (shader == PIPE_SHADER_TESS_CTRL)
99          svga->dirty |= SVGA_NEW_TCS_CONST_BUFFER;
100       else if (shader == PIPE_SHADER_TESS_EVAL)
101          svga->dirty |= SVGA_NEW_TES_CONST_BUFFER;
102 
103       /* update bitmask of dirty const buffers */
104       svga->state.dirty_constbufs[shader] |= (1 << index);
105    }
106 
107    if (cb && cb->user_buffer) {
108       pipe_resource_reference(&buf, NULL);
109    }
110 }
111 
112 
113 void
svga_init_constbuffer_functions(struct svga_context * svga)114 svga_init_constbuffer_functions(struct svga_context *svga)
115 {
116    svga->pipe.set_constant_buffer = svga_set_constant_buffer;
117 }
118 
119