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
29void 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
64void 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
98void 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