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
38static 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
70static 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
88static void *
89svga_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
103static 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
113static void svga_delete_vertex_elements_state(struct pipe_context *pipe,
114                                              void *velems)
115{
116   FREE(velems);
117}
118
119void 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
128void 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