CHEWY: Initial implementation of a resource manager, and a main loop

1 files changed, 82 insertions, 0 deletions

diff --git a/engines/chewy/resource.cpp b/engines/chewy/resource.cpp
new file mode 100644
index 0000000000..1d8764a979
--- /dev/null
+++ b/engines/chewy/resource.cpp
@@ -0,0 +1,82 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "common/stream.h"
+#include "common/debug.h"
+#include "common/textconsole.h"
+
+#include "chewy/chewy.h"
+#include "chewy/resource.h"
+
+namespace Chewy {
+
+Resource::Resource(Common::String filename) {
+	_stream.open(filename);
+	uint32 magicBytes = MKTAG('N', 'G', 'S', '\0');
+	if (_stream.readUint32BE() != magicBytes)
+		error("Invalid resource - %s", filename.c_str());
+	_stream.skip(2);	// type
+	_chunkCount = _stream.readUint16LE();
+
+	uint32 tbfID = MKTAG('T', 'B', 'F', '\0');
+
+	for (uint i = 0; i < _chunkCount; i++) {
+		TBFChunk cur;
+		cur.packedSize = _stream.readUint32LE();
+		cur.type = _stream.readUint16LE();
+		cur.pos = _stream.pos();
+		if (_stream.readUint32BE() != tbfID)
+			error("Corrupt resource %s", filename.c_str());
+
+		cur.screenMode = _stream.readUint16LE();
+		cur.compressionFlag = _stream.readUint16LE();
+		cur.unpackedSize = _stream.readUint32LE();
+		cur.width = _stream.readUint16LE();
+		cur.height = _stream.readUint16LE();
+		_stream.read(cur.palette, 3 * 256);
+		_stream.skip(cur.packedSize - TBF_CHUNK_HEADER_SIZE);
+
+		_tbfChunkList.push_back(cur);
+
+		/*debug("Chunk %d: packed %d, type %d, pos %d, mode %d, comp %d, unpacked %d, width %d, height %d",
+			i, cur.packedSize, cur.type, cur.pos, cur.screenMode, cur.compressionFlag, cur.unpackedSize,
+			cur.width, cur.height
+		);*/
+	}
+
+}
+
+Resource::~Resource() {
+	_tbfChunkList.clear();
+	_stream.close();
+}
+
+TBFChunk *Resource::getChunk(int num) {
+	return &_tbfChunkList[num];
+}
+
+Common::SeekableReadStream *Resource::getChunkData(int num) {
+	// TODO
+	return nullptr;
+}
+
+} // End of namespace Chewy