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                                         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_TRANSFER_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
  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_TRANSFER_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
  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_TRANSFER_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 }