1 /*
2 * Copyright 2010 Marek Olšák <maraeo@gmail.com>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
22
23 #include "r300_context.h"
24 #include "util/u_index_modify.h"
25 #include "util/u_upload_mgr.h"
26
27
r300_translate_index_buffer(struct r300_context * r300,struct pipe_index_buffer * ib,struct pipe_resource ** out_buffer,unsigned * index_size,unsigned index_offset,unsigned * start,unsigned count)28 void r300_translate_index_buffer(struct r300_context *r300,
29 struct pipe_index_buffer *ib,
30 struct pipe_resource **out_buffer,
31 unsigned *index_size, unsigned index_offset,
32 unsigned *start, unsigned count)
33 {
34 unsigned out_offset;
35 void *ptr;
36
37 switch (*index_size) {
38 case 1:
39 *out_buffer = NULL;
40 u_upload_alloc(r300->uploader, 0, count * 2,
41 &out_offset, out_buffer, &ptr);
42
43 util_shorten_ubyte_elts_to_userptr(
44 &r300->context, ib, index_offset,
45 *start, count, ptr);
46
47 *index_size = 2;
48 *start = out_offset / 2;
49 break;
50
51 case 2:
52 if (index_offset) {
53 *out_buffer = NULL;
54 u_upload_alloc(r300->uploader, 0, count * 2,
55 &out_offset, out_buffer, &ptr);
56
57 util_rebuild_ushort_elts_to_userptr(&r300->context, ib,
58 index_offset, *start,
59 count, ptr);
60
61 *start = out_offset / 2;
62 }
63 break;
64
65 case 4:
66 if (index_offset) {
67 *out_buffer = NULL;
68 u_upload_alloc(r300->uploader, 0, count * 4,
69 &out_offset, out_buffer, &ptr);
70
71 util_rebuild_uint_elts_to_userptr(&r300->context, ib,
72 index_offset, *start,
73 count, ptr);
74
75 *start = out_offset / 4;
76 }
77 break;
78 }
79 }
80