mirror of
https://github.com/libretro/scummvm.git
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126 lines
3.1 KiB
C++
126 lines
3.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*
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*/
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#include "common/file.h"
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#include "toltecs/toltecs.h"
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#include "toltecs/resource.h"
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namespace Toltecs {
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/* ArchiveReader */
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ArchiveReader::ArchiveReader() {
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}
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ArchiveReader::~ArchiveReader() {
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delete[] _offsets;
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}
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void ArchiveReader::openArchive(const char *filename) {
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open(filename);
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uint32 firstOffs = readUint32LE();
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uint count = firstOffs / 4;
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_offsets = new uint32[count];
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_offsets[0] = firstOffs;
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for (uint i = 1; i < count; i++)
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_offsets[i] = readUint32LE();
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}
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uint32 ArchiveReader::openResource(uint resIndex) {
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uint32 resourceSize = getResourceSize(resIndex);
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seek(_offsets[resIndex]);
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return resourceSize;
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}
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void ArchiveReader::closeResource() {
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}
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uint32 ArchiveReader::getResourceSize(uint resIndex) {
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return _offsets[resIndex + 1] - _offsets[resIndex];
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}
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void ArchiveReader::dump(uint resIndex) {
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int32 resourceSize = getResourceSize(resIndex);
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byte *data = new byte[resourceSize];
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Common::String fn = Common::String::format("toltecs_res.%03d", resIndex);
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openResource(resIndex);
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read(data, resourceSize);
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closeResource();
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Common::DumpFile o;
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o.open(fn);
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o.write(data, resourceSize);
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o.finalize();
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o.close();
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delete[] data;
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}
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/* ResourceCache */
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ResourceCache::ResourceCache(ToltecsEngine *vm) : _vm(vm) {
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}
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ResourceCache::~ResourceCache() {
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purgeCache();
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}
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void ResourceCache::purgeCache() {
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for (ResourceMap::iterator iter = _cache.begin(); iter != _cache.end(); ++iter) {
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delete[] iter->_value->data;
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delete iter->_value;
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iter->_value = 0;
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}
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_cache.clear();
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}
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Resource *ResourceCache::load(uint resIndex) {
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ResourceMap::iterator item = _cache.find(resIndex);
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if (item != _cache.end()) {
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debug(1, "ResourceCache::load(%d) From cache", resIndex);
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return (*item)._value;
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} else {
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debug(1, "ResourceCache::load(%d) From disk", resIndex);
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int32 curPos = _vm->_arc->pos();
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Resource *resItem = new Resource();
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resItem->size = _vm->_arc->openResource(resIndex);
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resItem->data = new byte[resItem->size];
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_vm->_arc->read(resItem->data, resItem->size);
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_vm->_arc->closeResource();
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_vm->_arc->seek(curPos);
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_cache[resIndex] = resItem;
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return resItem;
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}
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}
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} // End of namespace Toltecs
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