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  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. void util_shorten_ubyte_elts(struct pipe_context *context,
  62.                              struct pipe_index_buffer *ib,
  63.                              struct pipe_resource **out_buf,
  64.                              int index_bias,
  65.                              unsigned start,
  66.                              unsigned count)
  67. {
  68.     struct pipe_resource* new_elts;
  69.     unsigned short *out_map;
  70.     struct pipe_transfer *dst_transfer;
  71.  
  72.     new_elts = pipe_buffer_create(context->screen,
  73.                                   PIPE_BIND_INDEX_BUFFER,
  74.                                   PIPE_USAGE_STATIC,
  75.                                   2 * count);
  76.  
  77.     out_map = pipe_buffer_map(context, new_elts, PIPE_TRANSFER_WRITE,
  78.                               &dst_transfer);
  79.     util_shorten_ubyte_elts_to_userptr(context, ib, index_bias,
  80.                                        start, count, out_map);
  81.     pipe_buffer_unmap(context, dst_transfer);
  82.  
  83.     pipe_resource_reference(out_buf, NULL);
  84.     *out_buf = new_elts;
  85. }
  86.  
  87.  
  88. /* Ushort indices. */
  89.  
  90. void util_rebuild_ushort_elts_to_userptr(struct pipe_context *context,
  91.                                          struct pipe_index_buffer *ib,
  92.                                          int index_bias,
  93.                                          unsigned start, unsigned count,
  94.                                          void *out)
  95. {
  96.     struct pipe_transfer *in_transfer = NULL;
  97.     const unsigned short *in_map;
  98.     unsigned short *out_map = out;
  99.     unsigned i;
  100.  
  101.     if (ib->user_buffer) {
  102.        in_map = ib->user_buffer;
  103.     } else {
  104.        in_map = pipe_buffer_map(context, ib->buffer,
  105.                                 PIPE_TRANSFER_READ |
  106.                                 PIPE_TRANSFER_UNSYNCHRONIZED,
  107.                                 &in_transfer);
  108.     }
  109.     in_map += start;
  110.  
  111.     for (i = 0; i < count; i++) {
  112.         *out_map = (unsigned short)(*in_map + index_bias);
  113.         in_map++;
  114.         out_map++;
  115.     }
  116.  
  117.     if (in_transfer)
  118.        pipe_buffer_unmap(context, in_transfer);
  119. }
  120.  
  121. void util_rebuild_ushort_elts(struct pipe_context *context,
  122.                               struct pipe_index_buffer *ib,
  123.                               struct pipe_resource **out_buf,
  124.                               int index_bias,
  125.                               unsigned start, unsigned count)
  126. {
  127.     struct pipe_transfer *out_transfer = NULL;
  128.     struct pipe_resource *new_elts;
  129.     unsigned short *out_map;
  130.  
  131.     new_elts = pipe_buffer_create(context->screen,
  132.                                   PIPE_BIND_INDEX_BUFFER,
  133.                                   PIPE_USAGE_STATIC,
  134.                                   2 * count);
  135.  
  136.     out_map = pipe_buffer_map(context, new_elts,
  137.                               PIPE_TRANSFER_WRITE, &out_transfer);
  138.     util_rebuild_ushort_elts_to_userptr(context, ib, index_bias,
  139.                                         start, count, out_map);
  140.     pipe_buffer_unmap(context, out_transfer);
  141.  
  142.     pipe_resource_reference(out_buf, NULL);
  143.     *out_buf = new_elts;
  144. }
  145.  
  146.  
  147. /* Uint indices. */
  148.  
  149. void util_rebuild_uint_elts_to_userptr(struct pipe_context *context,
  150.                                        struct pipe_index_buffer *ib,
  151.                                        int index_bias,
  152.                                        unsigned start, unsigned count,
  153.                                        void *out)
  154. {
  155.     struct pipe_transfer *in_transfer = NULL;
  156.     const unsigned int *in_map;
  157.     unsigned int *out_map = out;
  158.     unsigned i;
  159.  
  160.     if (ib->user_buffer) {
  161.        in_map = ib->user_buffer;
  162.     } else {
  163.        in_map = pipe_buffer_map(context, ib->buffer,
  164.                                 PIPE_TRANSFER_READ |
  165.                                 PIPE_TRANSFER_UNSYNCHRONIZED,
  166.                                 &in_transfer);
  167.     }
  168.     in_map += start;
  169.  
  170.     for (i = 0; i < count; i++) {
  171.         *out_map = (unsigned int)(*in_map + index_bias);
  172.         in_map++;
  173.         out_map++;
  174.     }
  175.  
  176.     if (in_transfer)
  177.        pipe_buffer_unmap(context, in_transfer);
  178. }
  179.  
  180. void util_rebuild_uint_elts(struct pipe_context *context,
  181.                             struct pipe_index_buffer *ib,
  182.                             struct pipe_resource **out_buf,
  183.                             int index_bias,
  184.                             unsigned start, unsigned count)
  185. {
  186.     struct pipe_transfer *out_transfer = NULL;
  187.     struct pipe_resource *new_elts;
  188.     unsigned int *out_map;
  189.  
  190.     new_elts = pipe_buffer_create(context->screen,
  191.                                   PIPE_BIND_INDEX_BUFFER,
  192.                                   PIPE_USAGE_STATIC,
  193.                                   2 * count);
  194.  
  195.     out_map = pipe_buffer_map(context, new_elts,
  196.                               PIPE_TRANSFER_WRITE, &out_transfer);
  197.     util_rebuild_uint_elts_to_userptr(context, ib, index_bias,
  198.                                       start, count, out_map);
  199.     pipe_buffer_unmap(context, out_transfer);
  200.  
  201.     pipe_resource_reference(out_buf, NULL);
  202.     *out_buf = new_elts;
  203. }
  204.