1 /**************************************************************************
2  *
3  * Copyright 2010 Luca Barbieri
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  **************************************************************************/
26 
27 #include <stdlib.h>
28 #include <string.h>
29 #include "dxbc.h"
30 
dxbc_assemble(struct dxbc_chunk_header ** chunks,unsigned num_chunks)31 std::pair<void*, size_t> dxbc_assemble(struct dxbc_chunk_header** chunks, unsigned num_chunks)
32 {
33 	size_t data_size = 0;
34 	for(unsigned i = 0; i < num_chunks; ++i)
35 		data_size += sizeof(uint32_t) + sizeof(dxbc_chunk_header) + bswap_le32(chunks[i]->size);
36 
37 	size_t total_size = sizeof(dxbc_container_header) + data_size;
38 	dxbc_container_header* header = (dxbc_container_header*)malloc(total_size);
39 	if(!header)
40 		return std::make_pair((void*)0, 0);
41 
42 	header->fourcc = bswap_le32(FOURCC_DXBC);
43 	memset(header->unk, 0, sizeof(header->unk));
44 	header->one = bswap_le32(1);
45 	header->total_size = bswap_le32(total_size);
46 	header->chunk_count = num_chunks;
47 
48 	uint32_t* chunk_offsets = (uint32_t*)(header + 1);
49 	uint32_t off = sizeof(struct dxbc_container_header) + num_chunks * sizeof(uint32_t);
50 	for(unsigned i = 0; i < num_chunks; ++i)
51 	{
52 		chunk_offsets[i] = bswap_le32(off);
53 		unsigned chunk_full_size = sizeof(dxbc_chunk_header) + bswap_le32(chunks[i]->size);
54 		memcpy((char*)header + off, chunks[i], chunk_full_size);
55 		off += chunk_full_size;
56 	}
57 
58 	return std::make_pair((void*)header, total_size);
59 }
60