Initial commit

engines/saga/palanim.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/>.
+ *
+ */
+
+// Palette animation module
+#include "saga/saga.h"
+#include "saga/gfx.h"
+
+#include "saga/events.h"
+
+#include "saga/palanim.h"
+#include "saga/interface.h"
+
+namespace Saga {
+
+PalAnim::PalAnim(SagaEngine *vm) : _vm(vm) {
+}
+
+void PalAnim::loadPalAnim(const ByteArray &resourceData) {
+
+	clear();
+
+	if (resourceData.empty()) {
+		return;
+	}
+
+	ByteArrayReadStreamEndian readS(resourceData, _vm->isBigEndian());
+
+	if (_vm->getGameId() == GID_IHNM) {
+		return;
+	}
+
+	_entries.resize(readS.readUint16());
+
+	debug(3, "PalAnim::loadPalAnim(): Loading %d PALANIM entries.", _entries.size());
+
+	for (auto &palAnimEntry : _entries) {
+
+		palAnimEntry.cycle = 0;
+
+		palAnimEntry.colors.resize(readS.readUint16());
+		debug(2, "PalAnim::loadPalAnim(): Loading %d SAGA_COLOR structures.", palAnimEntry.colors.size());
+
+		palAnimEntry.palIndex.resize(readS.readUint16());
+		debug(2, "PalAnim::loadPalAnim(): Loading %d palette indices.\n", palAnimEntry.palIndex.size());
+
+
+		for (uint j = 0; j < palAnimEntry.palIndex.size(); j++) {
+			palAnimEntry.palIndex[j] = readS.readByte();
+		}
+
+		for (auto &color : palAnimEntry.colors) {
+			color.red = readS.readByte();
+			color.green = readS.readByte();
+			color.blue = readS.readByte();
+		}
+	}
+}
+
+void PalAnim::cycleStart() {
+	Event event;
+
+	if (_entries.empty()) {
+		return;
+	}
+
+	event.type = kEvTOneshot;
+	event.code = kPalAnimEvent;
+	event.op = kEventCycleStep;
+	event.time = PALANIM_CYCLETIME;
+	_vm->_events->queue(event);
+}
+
+void PalAnim::cycleStep(int vectortime) {
+	static PalEntry pal[256];
+	uint16 palIndex;
+	uint16 colIndex;
+
+	uint16 j;
+	uint16 cycle;
+	uint16 cycleLimit;
+
+	Event event;
+
+	if (_entries.empty()) {
+		return;
+	}
+
+	_vm->_gfx->getCurrentPal(pal);
+
+	for (auto &palAnimEntry : _entries) {
+		cycle = palAnimEntry.cycle;
+		cycleLimit = palAnimEntry.colors.size();
+		for (j = 0; j < palAnimEntry.palIndex.size(); j++) {
+			palIndex = palAnimEntry.palIndex[j];
+			colIndex = (cycle + j) % cycleLimit;
+			pal[palIndex].red = (byte) palAnimEntry.colors[colIndex].red;
+			pal[palIndex].green = (byte) palAnimEntry.colors[colIndex].green;
+			pal[palIndex].blue = (byte) palAnimEntry.colors[colIndex].blue;
+		}
+
+		palAnimEntry.cycle++;
+
+		if (palAnimEntry.cycle == cycleLimit) {
+			palAnimEntry.cycle = 0;
+		}
+	}
+
+	// Don't cycle the palette when the map is open
+	// Fixes bug #3636 - "ITE: Glitch when looking at the map while at the docks"
+	if (_vm->_interface->getMode() != kPanelMap)
+		_vm->_gfx->setPalette(pal);
+
+	event.type = kEvTOneshot;
+	event.code = kPalAnimEvent;
+	event.op = kEventCycleStep;
+	event.time = vectortime + PALANIM_CYCLETIME;
+	_vm->_events->queue(event);
+
+}
+
+void PalAnim::clear() {
+	debug(3, "PalAnim::clear()");
+
+	_entries.clear();
+}
+
+} // End of namespace Saga