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/*
* Copyright 2010 Marek Olšák <maraeo@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include "r300_context.h"
#include "util/u_index_modify.h"
#include "util/u_upload_mgr.h"
void r300_translate_index_buffer(struct r300_context *r300,
const struct pipe_draw_info *info,
struct pipe_resource **out_buffer,
unsigned *index_size, unsigned index_offset,
unsigned *start, unsigned count)
{
unsigned out_offset;
void *ptr;
switch (*index_size) {
case 1:
*out_buffer = NULL;
u_upload_alloc(r300->uploader, 0, count * 2, 4,
&out_offset, out_buffer, &ptr);
util_shorten_ubyte_elts_to_userptr(
&r300->context, info, PIPE_TRANSFER_UNSYNCHRONIZED, index_offset,
*start, count, ptr);
*index_size = 2;
*start = out_offset / 2;
break;
case 2:
if (index_offset) {
*out_buffer = NULL;
u_upload_alloc(r300->uploader, 0, count * 2, 4,
&out_offset, out_buffer, &ptr);
util_rebuild_ushort_elts_to_userptr(&r300->context, info,
PIPE_TRANSFER_UNSYNCHRONIZED,
index_offset, *start,
count, ptr);
*start = out_offset / 2;
}
break;
case 4:
if (index_offset) {
*out_buffer = NULL;
u_upload_alloc(r300->uploader, 0, count * 4, 4,
&out_offset, out_buffer, &ptr);
util_rebuild_uint_elts_to_userptr(&r300->context, info,
PIPE_TRANSFER_UNSYNCHRONIZED,
index_offset, *start,
count, ptr);
*start = out_offset / 4;
}
break;
}
}
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