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 "pipe/p_context.h"
24 #include "util/u_index_modify.h"
25 #include "util/u_inlines.h"
26
27 /* Ubyte indices. */
28
util_shorten_ubyte_elts_to_userptr(struct pipe_context * context,const struct pipe_draw_info * info,unsigned add_transfer_flags,int index_bias,unsigned start,unsigned count,void * out)29 void util_shorten_ubyte_elts_to_userptr(struct pipe_context *context,
30 const struct pipe_draw_info *info,
31 unsigned add_transfer_flags,
32 int index_bias,
33 unsigned start,
34 unsigned count,
35 void *out)
36 {
37 struct pipe_transfer *src_transfer = NULL;
38 const unsigned char *in_map;
39 unsigned short *out_map = out;
40 unsigned i;
41
42 if (info->has_user_indices) {
43 in_map = info->index.user;
44 } else {
45 in_map = pipe_buffer_map(context, info->index.resource,
46 PIPE_MAP_READ |
47 add_transfer_flags,
48 &src_transfer);
49 }
50 in_map += start;
51
52 for (i = 0; i < count; i++) {
53 *out_map = (unsigned short)(*in_map + index_bias);
54 in_map++;
55 out_map++;
56 }
57
58 if (src_transfer)
59 pipe_buffer_unmap(context, src_transfer);
60 }
61
62 /* Ushort indices. */
63
util_rebuild_ushort_elts_to_userptr(struct pipe_context * context,const struct pipe_draw_info * info,unsigned add_transfer_flags,int index_bias,unsigned start,unsigned count,void * out)64 void util_rebuild_ushort_elts_to_userptr(struct pipe_context *context,
65 const struct pipe_draw_info *info,
66 unsigned add_transfer_flags,
67 int index_bias,
68 unsigned start, unsigned count,
69 void *out)
70 {
71 struct pipe_transfer *in_transfer = NULL;
72 const unsigned short *in_map;
73 unsigned short *out_map = out;
74 unsigned i;
75
76 if (info->has_user_indices) {
77 in_map = info->index.user;
78 } else {
79 in_map = pipe_buffer_map(context, info->index.resource,
80 PIPE_MAP_READ |
81 add_transfer_flags,
82 &in_transfer);
83 }
84 in_map += start;
85
86 for (i = 0; i < count; i++) {
87 *out_map = (unsigned short)(*in_map + index_bias);
88 in_map++;
89 out_map++;
90 }
91
92 if (in_transfer)
93 pipe_buffer_unmap(context, in_transfer);
94 }
95
96 /* Uint indices. */
97
util_rebuild_uint_elts_to_userptr(struct pipe_context * context,const struct pipe_draw_info * info,unsigned add_transfer_flags,int index_bias,unsigned start,unsigned count,void * out)98 void util_rebuild_uint_elts_to_userptr(struct pipe_context *context,
99 const struct pipe_draw_info *info,
100 unsigned add_transfer_flags,
101 int index_bias,
102 unsigned start, unsigned count,
103 void *out)
104 {
105 struct pipe_transfer *in_transfer = NULL;
106 const unsigned int *in_map;
107 unsigned int *out_map = out;
108 unsigned i;
109
110 if (info->has_user_indices) {
111 in_map = info->index.user;
112 } else {
113 in_map = pipe_buffer_map(context, info->index.resource,
114 PIPE_MAP_READ |
115 add_transfer_flags,
116 &in_transfer);
117 }
118 in_map += start;
119
120 for (i = 0; i < count; i++) {
121 *out_map = (unsigned int)(*in_map + index_bias);
122 in_map++;
123 out_map++;
124 }
125
126 if (in_transfer)
127 pipe_buffer_unmap(context, in_transfer);
128 }
129