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/**************************************************************************
*
* Copyright 2010 Luca Barbieri
*
* 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 the rights to use, copy, modify, merge, publish,
* distribute, sublicense, 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 NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS 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 <stdlib.h>
#include <string.h>
#include "dxbc.h"
std::pair<void*, size_t> dxbc_assemble(struct dxbc_chunk_header** chunks, unsigned num_chunks)
{
size_t data_size = 0;
for(unsigned i = 0; i < num_chunks; ++i)
data_size += sizeof(uint32_t) + sizeof(dxbc_chunk_header) + bswap_le32(chunks[i]->size);
size_t total_size = sizeof(dxbc_container_header) + data_size;
dxbc_container_header* header = (dxbc_container_header*)malloc(total_size);
if(!header)
return std::make_pair((void*)0, 0);
header->fourcc = bswap_le32(FOURCC_DXBC);
memset(header->unk, 0, sizeof(header->unk));
header->one = bswap_le32(1);
header->total_size = bswap_le32(total_size);
header->chunk_count = num_chunks;
uint32_t* chunk_offsets = (uint32_t*)(header + 1);
uint32_t off = sizeof(struct dxbc_container_header) + num_chunks * sizeof(uint32_t);
for(unsigned i = 0; i < num_chunks; ++i)
{
chunk_offsets[i] = bswap_le32(off);
unsigned chunk_full_size = sizeof(dxbc_chunk_header) + bswap_le32(chunks[i]->size);
memcpy((char*)header + off, chunks[i], chunk_full_size);
off += chunk_full_size;
}
return std::make_pair((void*)header, total_size);
}
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