Initial commit

engines/freescape/loaders/c64.cpp

@@ -0,0 +1,51 @@
+/* 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 "freescape/freescape.h"
+
+namespace Freescape {
+
+byte *FreescapeEngine::decompressC64RLE(byte *buffer, int *size, byte marker) {
+	Common::MemoryReadWriteStream *tmp = new Common::MemoryReadWriteStream(DisposeAfterUse::NO);
+	// Format is: [ Byte, Marker, Length ] or [ Byte ]
+	for (int i = 0; i < *size - 1; ) {
+		if (buffer[i] == marker && i > 0) {
+			int length = buffer[i + 1];
+			byte value = buffer[i - 1];
+			if (length == 0)
+				tmp->writeByte(value);
+
+			for (int j = 0; j < length; j++) {
+				tmp->writeByte(value);
+			}
+			i += 2;
+		} else {
+			tmp->writeByte(buffer[i]);
+			i += 1;
+		}
+	}
+	*size = tmp->size();
+	byte *data = tmp->getData();
+	delete tmp;
+	return data;
+}
+
+} // namespace Freescape