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

engines/chewy/chewy.cpp

@@ -20,12 +20,16 @@
  *
  */
 
+#include "common/config-manager.h"
 #include "common/error.h"
+#include "common/events.h"
+#include "common/system.h"
 
 #include "engines/engine.h"
 #include "engines/util.h"
 
 #include "chewy/chewy.h"
+#include "chewy/resource.h"
 
 namespace Chewy {
 
@@ -33,6 +37,16 @@ ChewyEngine::ChewyEngine(OSystem *syst, const ChewyGameDescription *gameDesc)
 	: Engine(syst),
 	_gameDescription(gameDesc),
 	_rnd("chewy") {
+
+	const Common::FSNode gameDataDir(ConfMan.get("path"));
+
+	SearchMan.addSubDirectoryMatching(gameDataDir, "back");
+	SearchMan.addSubDirectoryMatching(gameDataDir, "cut");
+	SearchMan.addSubDirectoryMatching(gameDataDir, "err");
+	SearchMan.addSubDirectoryMatching(gameDataDir, "misc");
+	SearchMan.addSubDirectoryMatching(gameDataDir, "room");
+	SearchMan.addSubDirectoryMatching(gameDataDir, "sound");
+	SearchMan.addSubDirectoryMatching(gameDataDir, "txt");
 }
 
 ChewyEngine::~ChewyEngine() {
@@ -44,6 +58,28 @@ Common::Error ChewyEngine::run() {
 
 	initialize();
 
+	Resource *res = new Resource("comic.tgp");
+	TBFChunk *cur = res->getChunk(1);
+	
+	debug("Chunk 1: packed %d, type %d, pos %d, mode %d, comp %d, unpacked %d, width %d, height %d",
+		cur->packedSize, cur->type, cur->pos, cur->screenMode, cur->compressionFlag, cur->unpackedSize,
+		cur->width, cur->height
+	);
+
+	delete res;
+
+	// Run a dummy loop
+	Common::Event event;
+
+	while (!shouldQuit()) {
+		while (g_system->getEventManager()->pollEvent(event)) {
+			if ((event.type == Common::EVENT_KEYDOWN && event.kbd.keycode == Common::KEYCODE_ESCAPE) || event.type == Common::EVENT_LBUTTONUP)
+				g_engine->quitGame();
+		}
+
+		g_system->delayMillis(10);
+	}
+
 	return Common::kNoError;
 }
 

engines/chewy/module.mk

@@ -2,7 +2,8 @@ MODULE := engines/chewy
 
 MODULE_OBJS = \
 	chewy.o \
-	detection.o
+	detection.o \
+	resource.o
 
 
 # This module can be built as a plugin

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

engines/chewy/resource.h

@@ -0,0 +1,73 @@
+/* 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.
+ *
+ */
+
+#ifndef CHEWY_RESOURCE_H
+#define CHEWY_RESOURCE_H
+
+
+#include "common/scummsys.h"
+#include "common/file.h"
+#include "common/util.h"
+#include "common/str.h"
+#include "common/hashmap.h"
+#include "common/hash-str.h"
+#include "common/random.h"
+
+namespace Chewy {
+
+// 4 + 2 + 2 + 4 + 2 + 2 + 768 = 784 bytes
+#define TBF_CHUNK_HEADER_SIZE 784
+
+struct TBFChunk {
+	uint32 packedSize;	// includes header
+	uint16 type;
+	uint32 pos;	// extra field
+
+	// TBF chunk header
+	// ID (TBF, followed by a zero)
+	uint16 screenMode;
+	uint16 compressionFlag;
+	uint32 unpackedSize;
+	uint16 width;
+	uint16 height;
+	char palette[3 * 256];
+};
+
+typedef Common::Array<TBFChunk> TBFChunkList;
+
+class Resource {
+public:
+	Resource(Common::String filename);
+	~Resource();
+
+	TBFChunk *getChunk(int num);
+	Common::SeekableReadStream *getChunkData(int num);
+
+private:
+	Common::File _stream;
+	uint16 _chunkCount;
+	TBFChunkList _tbfChunkList;
+};
+
+} // End of namespace Chewy
+
+#endif