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 "util/u_memory.h"
30 #include "util/u_transfer.h"
31 #include "tgsi/tgsi_parse.h"
32 
33 #include "svga_screen.h"
34 #include "svga_resource_buffer.h"
35 #include "svga_context.h"
36 
37 
svga_set_vertex_buffers(struct pipe_context * pipe,unsigned count,const struct pipe_vertex_buffer * buffers)38 static void svga_set_vertex_buffers(struct pipe_context *pipe,
39                                     unsigned count,
40                                     const struct pipe_vertex_buffer *buffers)
41 {
42    struct svga_context *svga = svga_context(pipe);
43    unsigned i;
44    boolean any_user_buffer = FALSE;
45 
46    /* Check for no change */
47    if (count == svga->curr.num_vertex_buffers &&
48        memcmp(svga->curr.vb, buffers, count * sizeof buffers[0]) == 0)
49       return;
50 
51    /* Adjust refcounts */
52    for (i = 0; i < count; i++) {
53       pipe_resource_reference(&svga->curr.vb[i].buffer, buffers[i].buffer);
54       if (svga_buffer_is_user_buffer(buffers[i].buffer))
55          any_user_buffer = TRUE;
56    }
57 
58    for ( ; i < svga->curr.num_vertex_buffers; i++)
59       pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
60 
61    /* Copy remaining data */
62    memcpy(svga->curr.vb, buffers, count * sizeof buffers[0]);
63    svga->curr.num_vertex_buffers = count;
64    svga->curr.any_user_vertex_buffers = any_user_buffer;
65 
66    svga->dirty |= SVGA_NEW_VBUFFER;
67 }
68 
69 
svga_set_index_buffer(struct pipe_context * pipe,const struct pipe_index_buffer * ib)70 static void svga_set_index_buffer(struct pipe_context *pipe,
71                                   const struct pipe_index_buffer *ib)
72 {
73    struct svga_context *svga = svga_context(pipe);
74 
75    if (ib) {
76       pipe_resource_reference(&svga->curr.ib.buffer, ib->buffer);
77       memcpy(&svga->curr.ib, ib, sizeof(svga->curr.ib));
78    }
79    else {
80       pipe_resource_reference(&svga->curr.ib.buffer, NULL);
81       memset(&svga->curr.ib, 0, sizeof(svga->curr.ib));
82    }
83 
84    /* TODO make this more like a state */
85 }
86 
87 
88 static void *
svga_create_vertex_elements_state(struct pipe_context * pipe,unsigned count,const struct pipe_vertex_element * attribs)89 svga_create_vertex_elements_state(struct pipe_context *pipe,
90                                   unsigned count,
91                                   const struct pipe_vertex_element *attribs)
92 {
93    struct svga_velems_state *velems;
94    assert(count <= PIPE_MAX_ATTRIBS);
95    velems = (struct svga_velems_state *) MALLOC(sizeof(struct svga_velems_state));
96    if (velems) {
97       velems->count = count;
98       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
99    }
100    return velems;
101 }
102 
svga_bind_vertex_elements_state(struct pipe_context * pipe,void * velems)103 static void svga_bind_vertex_elements_state(struct pipe_context *pipe,
104                                             void *velems)
105 {
106    struct svga_context *svga = svga_context(pipe);
107    struct svga_velems_state *svga_velems = (struct svga_velems_state *) velems;
108 
109    svga->curr.velems = svga_velems;
110    svga->dirty |= SVGA_NEW_VELEMENT;
111 }
112 
svga_delete_vertex_elements_state(struct pipe_context * pipe,void * velems)113 static void svga_delete_vertex_elements_state(struct pipe_context *pipe,
114                                               void *velems)
115 {
116    FREE(velems);
117 }
118 
svga_cleanup_vertex_state(struct svga_context * svga)119 void svga_cleanup_vertex_state( struct svga_context *svga )
120 {
121    unsigned i;
122 
123    for (i = 0 ; i < svga->curr.num_vertex_buffers; i++)
124       pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
125 }
126 
127 
svga_init_vertex_functions(struct svga_context * svga)128 void svga_init_vertex_functions( struct svga_context *svga )
129 {
130    svga->pipe.set_vertex_buffers = svga_set_vertex_buffers;
131    svga->pipe.set_index_buffer = svga_set_index_buffer;
132    svga->pipe.create_vertex_elements_state = svga_create_vertex_elements_state;
133    svga->pipe.bind_vertex_elements_state = svga_bind_vertex_elements_state;
134    svga->pipe.delete_vertex_elements_state = svga_delete_vertex_elements_state;
135 }
136 
137 
138