1 /* 2 * Copyright 2010 Marek Olk <maraeo (at) 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 "r300_context.h" 24 #include "util/u_index_modify.h" 25 #include "util/u_upload_mgr.h" 26 27 28 void r300_translate_index_buffer(struct r300_context *r300, 29 struct pipe_index_buffer *ib, 30 struct pipe_resource **out_buffer, 31 unsigned *index_size, unsigned index_offset, 32 unsigned *start, unsigned count) 33 { 34 unsigned out_offset; 35 void *ptr; 36 37 switch (*index_size) { 38 case 1: 39 *out_buffer = NULL; 40 u_upload_alloc(r300->uploader, 0, count * 2, 41 &out_offset, out_buffer, &ptr); 42 43 util_shorten_ubyte_elts_to_userptr( 44 &r300->context, ib, index_offset, 45 *start, count, ptr); 46 47 *index_size = 2; 48 *start = out_offset / 2; 49 break; 50 51 case 2: 52 if (index_offset) { 53 *out_buffer = NULL; 54 u_upload_alloc(r300->uploader, 0, count * 2, 55 &out_offset, out_buffer, &ptr); 56 57 util_rebuild_ushort_elts_to_userptr(&r300->context, ib, 58 index_offset, *start, 59 count, ptr); 60 61 *start = out_offset / 2; 62 } 63 break; 64 65 case 4: 66 if (index_offset) { 67 *out_buffer = NULL; 68 u_upload_alloc(r300->uploader, 0, count * 4, 69 &out_offset, out_buffer, &ptr); 70 71 util_rebuild_uint_elts_to_userptr(&r300->context, ib, 72 index_offset, *start, 73 count, ptr); 74 75 *start = out_offset / 4; 76 } 77 break; 78 } 79 } 80
