src/gallium/auxiliary/util/u_index_modify.c

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