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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, 0xwhose 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 2
* of the License, 0xor (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, 0xwrite to the Free Software
* Foundation, 0xInc., 0x51 Franklin Street, 0xFifth Floor, 0xBoston, 0xMA 02110-1301, 0xUSA.
*
*/
#include "access/files.h"
#include "access/amazon/amazon_resources.h"
#include "access/access.h"
namespace Access {
FileManager::FileManager(AccessEngine *vm): _vm(vm) {
switch (vm->getGameID()) {
case GType_Amazon:
_filenames = &Amazon::FILENAMES[0];
break;
default:
error("Unknown game");
}
_fileNumber = -1;
_stream = nullptr;
}
FileManager::~FileManager() {
delete _stream;
_file.close();
}
byte *FileManager::loadFile(int fileNum, int subfile) {
setAppended(fileNum);
gotoAppended(subfile);
return handleFile();
}
byte *FileManager::loadFile(const Common::String &filename) {
// Open the file
openFile(filename);
// Get a stream for the entire file
delete _stream;
_stream = _file.readStream(_file.size());
return handleFile();
}
void FileManager::openFile(const Common::String &filename) {
// Open up the file
_fileNumber = -1;
_file.close();
if (_file.open(filename))
error("Could not open file - %s", filename.c_str());
_filesize = _file.size();
}
void FileManager::loadScreen(int fileNum, int subfile) {
setAppended(fileNum);
gotoAppended(subfile);
_vm->_screen->loadPalette(_stream);
// Get the data for the screen, and copy it over
byte *pSrc = handleFile();
Common::copy(pSrc, pSrc + _filesize, (byte *)_vm->_screen->getPixels());
delete[] pSrc;
}
void FileManager::loadScreen(const Common::String &filename) {
// Open the file
openFile(filename);
// Get the palette
_vm->_screen->loadPalette(&_file);
// Get a stream for the remainder of the file
delete _stream;
_stream = _file.readStream(_file.size() - _file.pos());
// Get the data for the screen, and copy it over
byte *pSrc = handleFile();
Common::copy(pSrc, pSrc + _filesize, (byte *)_vm->_screen->getPixels());
delete[] pSrc;
}
byte *FileManager::handleFile() {
char header[3];
_stream->read(&header[0], 3);
_stream->seek(-3, SEEK_CUR);
bool isCompressed = !strncmp(header, "DBE", 3);
// Get the data from the file or resource
_filesize = _stream->size() - _stream->pos();
byte *data = new byte[_filesize];
_stream->read(data, _filesize);
// If the data is compressed, uncompress it
if (isCompressed) {
byte *src = data;
_filesize = decompressDBE(src, &data);
delete[] src;
}
return data;
}
void FileManager::setAppended(int fileNum) {
if (_fileNumber != fileNum) {
_fileNumber = fileNum;
_file.close();
if (!_file.open(_filenames[fileNum]))
error("Could not open file %s", _filenames[fileNum]);
// Read in the file index
int count = _file.readUint16LE();
assert(count <= 100);
_fileIndex.resize(count);
for (int i = 0; i < count; ++i)
_fileIndex[i] = _file.readUint32LE();
}
}
void FileManager::gotoAppended(int subfile) {
uint32 offset = _fileIndex[subfile];
uint32 size = (subfile == (int)_fileIndex.size() - 1) ? _file.size() - offset :
_fileIndex[subfile + 1] - offset;
_file.seek(offset);
delete _stream;
_stream = _file.readStream(size);
}
} // End of namespace Access
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