Initial commit

engines/grim/emi/layer.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 "common/str.h"
+
+#include "engines/grim/emi/layer.h"
+#include "engines/grim/bitmap.h"
+
+namespace Grim {
+
+Layer::Layer() : _filename(""), _sortOrder(0), _frame(0), _bitmap(nullptr) {
+}
+
+Layer::Layer(const Common::String &filename, int sortOrder) : _filename(filename), _sortOrder(sortOrder), _frame(0) {
+	_bitmap = Bitmap::create(filename);
+}
+
+Layer::~Layer() {
+	delete _bitmap;
+}
+
+void Layer::draw() {
+	_bitmap->drawLayer(_frame);
+}
+
+void Layer::setFrame(int frame) {
+	int numframes = _bitmap->getNumLayers();
+	if (frame >= numframes || frame < 0) {
+		warning("Layer::setFrame: invalid frame number: %d, numLayers: %d", frame, numframes);
+		return;
+	}
+	_frame = frame;
+}
+
+void Layer::setSortOrder(int order) {
+	_sortOrder = order;
+}
+
+void Layer::advanceFrame(int num) {
+	_frame += num;
+	int numframes = _bitmap->getNumLayers();
+	_frame %= numframes;
+}
+
+void Layer::saveState(SaveGame *state) {
+	if (_bitmap) {
+		state->writeBool(true);
+		state->writeString(_bitmap->getFilename());
+	} else {
+		state->writeBool(false);
+	}
+	state->writeLESint32(_frame);
+	state->writeLESint32(_sortOrder);
+}
+
+void Layer::restoreState(SaveGame *state) {
+	bool hasBitmap = state->readBool();
+	if (hasBitmap)
+		_bitmap = Bitmap::create(state->readString());
+	_frame = state->readLESint32();
+	_sortOrder = state->readLESint32();
+}
+
+}