mirror of
https://github.com/libretro/scummvm.git
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130 lines
4.3 KiB
C++
130 lines
4.3 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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#include "neverhood/resourceman.h"
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namespace Neverhood {
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ResourceHandle::ResourceHandle()
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: _resourceFileEntry(NULL), _data(NULL) {
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}
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ResourceHandle::~ResourceHandle() {
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}
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ResourceMan::ResourceMan() {
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}
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ResourceMan::~ResourceMan() {
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}
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void ResourceMan::addArchive(const Common::String &filename) {
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BlbArchive *archive = new BlbArchive();
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archive->open(filename);
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_archives.push_back(archive);
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debug(3, "ResourceMan::addArchive(%s) %d files", filename.c_str(), archive->getCount());
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for (uint archiveEntryIndex = 0; archiveEntryIndex < archive->getCount(); archiveEntryIndex++) {
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BlbArchiveEntry *archiveEntry = archive->getEntry(archiveEntryIndex);
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ResourceFileEntry *entry = findEntrySimple(archiveEntry->fileHash);
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if (entry) {
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if (archiveEntry->timeStamp > entry->archiveEntry->timeStamp) {
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entry->archive = archive;
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entry->archiveEntry = archiveEntry;
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}
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} else {
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ResourceFileEntry newEntry;
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newEntry.resourceHandle = -1;
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newEntry.archive = archive;
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newEntry.archiveEntry = archiveEntry;
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_entries[archiveEntry->fileHash] = newEntry;
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}
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}
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debug("_entries.size() = %d", _entries.size());
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}
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ResourceFileEntry *ResourceMan::findEntrySimple(uint32 fileHash) {
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EntriesMap::iterator p = _entries.find(fileHash);
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return p != _entries.end() ? &(*p)._value : NULL;
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}
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ResourceFileEntry *ResourceMan::findEntry(uint32 fileHash, ResourceFileEntry **firstEntry) {
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ResourceFileEntry *entry = findEntrySimple(fileHash);
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if (firstEntry)
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*firstEntry = entry;
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for (; entry && entry->archiveEntry->comprType == 0x65; fileHash = entry->archiveEntry->diskSize)
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entry = findEntrySimple(fileHash);
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return entry;
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}
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Common::SeekableReadStream *ResourceMan::createStream(uint32 fileHash) {
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ResourceFileEntry *entry = findEntry(fileHash);
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return entry ? entry->archive->createStream(entry->archiveEntry) : NULL;
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}
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void ResourceMan::queryResource(uint32 fileHash, ResourceHandle &resourceHandle) {
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ResourceFileEntry *firstEntry;
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resourceHandle._resourceFileEntry = findEntry(fileHash, &firstEntry);
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resourceHandle._extData = firstEntry ? firstEntry->archiveEntry->extData : NULL;
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}
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void ResourceMan::loadResource(ResourceHandle &resourceHandle) {
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resourceHandle._data = NULL;
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if (resourceHandle.isValid()) {
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const uint32 fileHash = resourceHandle.fileHash();
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ResourceData *resourceData = _data[fileHash];
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if (!resourceData) {
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resourceData = new ResourceData();
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_data[fileHash] = resourceData;
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}
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if (resourceData->data != NULL) {
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resourceData->dataRefCount++;
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} else {
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resourceData->data = new byte[resourceHandle._resourceFileEntry->archiveEntry->size];
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resourceHandle._resourceFileEntry->archive->load(resourceHandle._resourceFileEntry->archiveEntry, resourceData->data, 0);
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resourceData->dataRefCount = 1;
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}
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resourceHandle._data = resourceData->data;
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}
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}
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void ResourceMan::unloadResource(ResourceHandle &resourceHandle) {
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if (resourceHandle.isValid()) {
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ResourceData *resourceData = _data[resourceHandle.fileHash()];
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if (resourceData && resourceData->dataRefCount > 0)
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--resourceData->dataRefCount;
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resourceHandle._resourceFileEntry = NULL;
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resourceHandle._data = NULL;
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}
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}
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void ResourceMan::purgeResources() {
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for (Common::HashMap<uint32, ResourceData*>::iterator it = _data.begin(); it != _data.end(); ++it) {
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ResourceData *resourceData = (*it)._value;
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if (resourceData->dataRefCount == 0) {
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delete resourceData->data;
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resourceData->data = NULL;
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}
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}
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}
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} // End of namespace Neverhood
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