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engines/gob/demos/scnplayer.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/>.
+ *
+ *
+ * This file is dual-licensed.
+ * In addition to the GPLv3 license mentioned above, this code is also
+ * licensed under LGPL 2.1. See LICENSES/COPYING.LGPL file for the
+ * full text of the license.
+ *
+ */
+
+#include "common/endian.h"
+
+#include "gob/gob.h"
+#include "gob/demos/scnplayer.h"
+#include "gob/global.h"
+#include "gob/util.h"
+#include "gob/draw.h"
+#include "gob/inter.h"
+#include "gob/videoplayer.h"
+
+namespace Gob {
+
+SCNPlayer::SCNPlayer(GobEngine *vm) : DemoPlayer(vm) {
+}
+
+SCNPlayer::~SCNPlayer() {
+}
+
+bool SCNPlayer::playStream(Common::SeekableReadStream &scn) {
+	// Read labels
+	LabelMap labels;
+	if (!readLabels(scn, labels))
+		return false;
+
+	// Iterate over all lines
+	while (!scn.err() && !scn.eos()) {
+		Common::String line = scn.readLine();
+
+		// Interpret
+		if (line == "CLEAR") {
+			clearScreen();
+		} else if (lineStartsWith(line, "VIDEO:")) {
+			evaluateVideoMode(line.c_str() + 6);
+		} else if (lineStartsWith(line, "IMD_PRELOAD ")) {
+			playVideo(line.c_str() + 12);
+		} else if (lineStartsWith(line, "IMD ")) {
+			playVideo(line.c_str() + 4);
+		} else if (lineStartsWith(line, "GOTO ")) {
+			gotoLabel(scn, labels, line.c_str() + 5);
+		} else if (lineStartsWith(line, "REBASE0:ON")) {
+			_rebase0 = true;
+		} else if (lineStartsWith(line, "REBASE0:OFF")) {
+			_rebase0 = false;
+		} else if (lineStartsWith(line, "ADL ")) {
+			playADL(line.c_str() + 4);
+		}
+
+		// Mind user input
+		_vm->_util->processInput();
+		if (_vm->shouldQuit())
+			return true;
+	}
+
+	if (scn.err())
+		return false;
+
+	return true;
+}
+
+bool SCNPlayer::readLabels(Common::SeekableReadStream &scn, LabelMap &labels) {
+	debugC(1, kDebugDemo, "Reading SCN labels");
+
+	int32 startPos = scn.pos();
+
+	// Iterate over all lines
+	while (!scn.err() && !scn.eos()) {
+		Common::String line = scn.readLine();
+
+		if (lineStartsWith(line, "LABEL ")) {
+			// Label => Add to the hashmap
+			labels.setVal(line.c_str() + 6, scn.pos());
+			debugC(2, kDebugDemo, "Found label \"%s\" (%d)", line.c_str() + 6, (int)scn.pos());
+		}
+	}
+
+	if (scn.err())
+		return false;
+
+	// Seek back
+	if (!scn.seek(startPos))
+		return false;
+
+	return true;
+}
+
+void SCNPlayer::gotoLabel(Common::SeekableReadStream &scn,
+		const LabelMap &labels, const char *label) {
+
+	debugC(2, kDebugDemo, "Jumping to label \"%s\"", label);
+
+	if (!labels.contains(label))
+		return;
+
+	scn.seek(labels.getVal(label));
+}
+
+} // End of namespace Gob