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engines/cryomni3d/image/hlz.cpp

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+/* 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 "cryomni3d/image/hlz.h"
+
+#include "common/stream.h"
+#include "common/substream.h"
+#include "common/textconsole.h"
+#include "graphics/pixelformat.h"
+#include "graphics/surface.h"
+#include "image/codecs/codec.h"
+
+#include "image/codecs/hlz.h"
+
+namespace Image {
+
+HLZFileDecoder::HLZFileDecoder() : _codec(nullptr), _surface(nullptr), _palette(256) {
+}
+
+HLZFileDecoder::~HLZFileDecoder() {
+	destroy();
+}
+
+void HLZFileDecoder::destroy() {
+	delete _codec;
+	_codec = nullptr;
+	_surface = nullptr;
+}
+
+bool HLZFileDecoder::loadStream(Common::SeekableReadStream &stream) {
+	destroy();
+
+	for (uint16 i = 0; i < 256; i++) {
+		byte r = stream.readByte();
+		byte g = stream.readByte();
+		byte b = stream.readByte();
+		_palette.set(i, r, g, b);
+	}
+
+	uint16 width = stream.readUint16LE();
+	uint16 height = stream.readUint16LE();
+
+	if (width == 0 || height == 0) {
+		return false;
+	}
+
+	_codec = new HLZDecoder(width, height);
+	_surface = _codec->decodeFrame(stream);
+	return true;
+}
+
+} // End of namespace Image