workbench/libs/mesa/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_resource *elts,
  31                                         int index_bias,
  32                                         unsigned start,
  33                                         unsigned count,
  34                                         void *out)
  35 {
  36     struct pipe_transfer *src_transfer;
  37     unsigned char *in_map;
  38     unsigned short *out_map = out;
  39     unsigned i;
  40
  41     in_map = pipe_buffer_map(context, elts,
  42                              PIPE_TRANSFER_READ |
  43                              PIPE_TRANSFER_UNSYNCHRONIZED,
  44                              &src_transfer);
  45     in_map += start;
  46
  47     for (i = 0; i < count; i++) {
  48         *out_map = (unsigned short)(*in_map + index_bias);
  49         in_map++;
  50         out_map++;
  51     }
  52
  53     pipe_buffer_unmap(context, src_transfer);
  54 }
  55
  56 void util_shorten_ubyte_elts(struct pipe_context *context,
  57                              struct pipe_resource **elts,
  58                              int index_bias,
  59                              unsigned start,
  60                              unsigned count)
  61 {
  62     struct pipe_resource* new_elts;
  63     unsigned short *out_map;
  64     struct pipe_transfer *dst_transfer;
  65
  66     new_elts = pipe_buffer_create(context->screen,
  67                                   PIPE_BIND_INDEX_BUFFER,
  68                                   PIPE_USAGE_STATIC,
  69                                   2 * count);
  70
  71     out_map = pipe_buffer_map(context, new_elts, PIPE_TRANSFER_WRITE,
  72                               &dst_transfer);
  73     util_shorten_ubyte_elts_to_userptr(context, *elts, index_bias,
  74                                        start, count, out_map);
  75     pipe_buffer_unmap(context, dst_transfer);
  76
  77     *elts = new_elts;
  78 }
  79
  80
  81 /* Ushort indices. */
  82
  83 void util_rebuild_ushort_elts_to_userptr(struct pipe_context *context,
  84                                          struct pipe_resource *elts,
  85                                          int index_bias,
  86                                          unsigned start, unsigned count,
  87                                          void *out)
  88 {
  89     struct pipe_transfer *in_transfer = NULL;
  90     unsigned short *in_map;
  91     unsigned short *out_map = out;
  92     unsigned i;
  93
  94     in_map = pipe_buffer_map(context, elts,
  95                              PIPE_TRANSFER_READ |
  96                              PIPE_TRANSFER_UNSYNCHRONIZED,
  97                              &in_transfer);
  98     in_map += start;
  99
 100     for (i = 0; i < count; i++) {
 101         *out_map = (unsigned short)(*in_map + index_bias);
 102         in_map++;
 103         out_map++;
 104     }
 105
 106     pipe_buffer_unmap(context, in_transfer);
 107 }
 108
 109 void util_rebuild_ushort_elts(struct pipe_context *context,
 110                               struct pipe_resource **elts,
 111                               int index_bias,
 112                               unsigned start, unsigned count)
 113 {
 114     struct pipe_transfer *out_transfer = NULL;
 115     struct pipe_resource *new_elts;
 116     unsigned short *out_map;
 117
 118     new_elts = pipe_buffer_create(context->screen,
 119                                   PIPE_BIND_INDEX_BUFFER,
 120                                   PIPE_USAGE_STATIC,
 121                                   2 * count);
 122
 123     out_map = pipe_buffer_map(context, new_elts,
 124                               PIPE_TRANSFER_WRITE, &out_transfer);
 125     util_rebuild_ushort_elts_to_userptr(context, *elts, index_bias,
 126                                         start, count, out_map);
 127     pipe_buffer_unmap(context, out_transfer);
 128
 129     *elts = new_elts;
 130 }
 131
 132
 133 /* Uint indices. */
 134
 135 void util_rebuild_uint_elts_to_userptr(struct pipe_context *context,
 136                                        struct pipe_resource *elts,
 137                                        int index_bias,
 138                                        unsigned start, unsigned count,
 139                                        void *out)
 140 {
 141     struct pipe_transfer *in_transfer = NULL;
 142     unsigned int *in_map;
 143     unsigned int *out_map = out;
 144     unsigned i;
 145
 146     in_map = pipe_buffer_map(context, elts,
 147                              PIPE_TRANSFER_READ |
 148                              PIPE_TRANSFER_UNSYNCHRONIZED,
 149                              &in_transfer);
 150     in_map += start;
 151
 152     for (i = 0; i < count; i++) {
 153         *out_map = (unsigned int)(*in_map + index_bias);
 154         in_map++;
 155         out_map++;
 156     }
 157
 158     pipe_buffer_unmap(context, in_transfer);
 159 }
 160
 161 void util_rebuild_uint_elts(struct pipe_context *context,
 162                             struct pipe_resource **elts,
 163                             int index_bias,
 164                             unsigned start, unsigned count)
 165 {
 166     struct pipe_transfer *out_transfer = NULL;
 167     struct pipe_resource *new_elts;
 168     unsigned int *out_map;
 169
 170     new_elts = pipe_buffer_create(context->screen,
 171                                   PIPE_BIND_INDEX_BUFFER,
 172                                   PIPE_USAGE_STATIC,
 173                                   2 * count);
 174
 175     out_map = pipe_buffer_map(context, new_elts,
 176                               PIPE_TRANSFER_WRITE, &out_transfer);
 177     util_rebuild_uint_elts_to_userptr(context, *elts, index_bias,
 178                                       start, count, out_map);
 179     pipe_buffer_unmap(context, out_transfer);
 180
 181     *elts = new_elts;
 182 }