Initial commit

engines/toltecs/resource.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/file.h"
+
+#include "toltecs/toltecs.h"
+#include "toltecs/resource.h"
+
+namespace Toltecs {
+
+
+/* ArchiveReader */
+
+ArchiveReader::ArchiveReader() {
+	_offsets = 0;
+}
+
+ArchiveReader::~ArchiveReader() {
+	delete[] _offsets;
+}
+
+void ArchiveReader::openArchive(const char *filename) {
+	open(filename);
+	uint32 firstOffs = readUint32LE();
+	uint count = firstOffs / 4;
+	_offsets = new uint32[count];
+	_offsets[0] = firstOffs;
+	for (uint i = 1; i < count; i++)
+		_offsets[i] = readUint32LE();
+}
+
+uint32 ArchiveReader::openResource(uint resIndex) {
+	uint32 resourceSize = getResourceSize(resIndex);
+	seek(_offsets[resIndex]);
+	return resourceSize;
+}
+
+void ArchiveReader::closeResource() {
+}
+
+uint32 ArchiveReader::getResourceSize(uint resIndex) {
+	return _offsets[resIndex + 1] - _offsets[resIndex];
+}
+
+void ArchiveReader::dump(uint resIndex) {
+	int32 resourceSize = getResourceSize(resIndex);
+	byte *data = new byte[resourceSize];
+
+	Common::Path fn(Common::String::format("toltecs_res.%03d", resIndex));
+
+	openResource(resIndex);
+	read(data, resourceSize);
+	closeResource();
+
+	Common::DumpFile o;
+	o.open(fn);
+	o.write(data, resourceSize);
+	o.finalize();
+	o.close();
+
+	delete[] data;
+}
+
+/* ResourceCache */
+
+ResourceCache::ResourceCache(ToltecsEngine *vm) : _vm(vm) {
+}
+
+ResourceCache::~ResourceCache() {
+	purgeCache();
+}
+
+void ResourceCache::purgeCache() {
+	for (ResourceMap::iterator iter = _cache.begin(); iter != _cache.end(); ++iter) {
+		delete[] iter->_value->data;
+		delete iter->_value;
+		iter->_value = 0;
+	}
+
+	_cache.clear();
+}
+
+Resource *ResourceCache::load(uint resIndex) {
+	ResourceMap::iterator item = _cache.find(resIndex);
+	if (item != _cache.end()) {
+		debug(1, "ResourceCache::load(%d) From cache", resIndex);
+		return (*item)._value;
+	} else {
+		debug(1, "ResourceCache::load(%d) From disk", resIndex);
+
+		int32 curPos = _vm->_arc->pos();
+		Resource *resItem = new Resource();
+		resItem->size = _vm->_arc->openResource(resIndex);
+		resItem->data = new byte[resItem->size];
+		_vm->_arc->read(resItem->data, resItem->size);
+		_vm->_arc->closeResource();
+		_vm->_arc->seek(curPos);
+
+		_cache[resIndex] = resItem;
+
+		return resItem;
+
+	}
+}
+
+} // End of namespace Toltecs