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engines/darkseed/pal.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 "graphics/paletteman.h"
+#include "darkseed/pal.h"
+#include "darkseed/darkseed.h"
+
+namespace Darkseed {
+
+#define DARKSEED_NUM_PAL_ENTRIES 16
+#define DARKSEED_PAL_SIZE (DARKSEED_NUM_PAL_ENTRIES * 3)
+
+Pal::Pal(const Pal &pal) {
+	load(pal);
+}
+
+Pal &Pal::operator=(const Pal &pal) {
+	if (this != &pal) {
+		load(pal);
+	}
+	return *this;
+}
+
+void Pal::load(const Pal &pal) {
+	memcpy(_palData, pal._palData, DARKSEED_PAL_SIZE);
+}
+
+bool Pal::load(const Common::Path &filename, bool shouldInstallPalette) {
+	Common::File file;
+	if (!file.open(filename)) {
+		loadFromScreen();
+		return false;
+	}
+
+	return loadFromStream(file, shouldInstallPalette);
+}
+
+bool Pal::loadFromStream(Common::SeekableReadStream &readStream, bool shouldInstallPalette) {
+	uint32 bytesRead = readStream.read(_palData, DARKSEED_PAL_SIZE);
+	assert(bytesRead == DARKSEED_PAL_SIZE);
+
+	for (int i = 0; i < DARKSEED_PAL_SIZE; i++) {
+		_palData[i] = _palData[i] << 2;
+	}
+	if (shouldInstallPalette) {
+		installPalette();
+	}
+
+	return true;
+}
+
+void Pal::loadFromScreen() {
+	g_system->getPaletteManager()->grabPalette(_palData, 0, DARKSEED_NUM_PAL_ENTRIES);
+}
+
+void Pal::clear() {
+	memset(_palData, 0, DARKSEED_PAL_SIZE);
+}
+
+void Pal::swapEntries(int idx1, int idx2) {
+	uint8 tmpEntry[3];
+	tmpEntry[0] = _palData[idx1 * 3];
+	tmpEntry[1] = _palData[idx1 * 3 + 1];
+	tmpEntry[2] = _palData[idx1 * 3 + 2];
+
+	_palData[idx1 * 3] = _palData[idx2 * 3];
+	_palData[idx1 * 3 + 1] = _palData[idx2 * 3 + 1];
+	_palData[idx1 * 3 + 2] = _palData[idx2 * 3 + 2];
+
+	_palData[idx2 * 3] = tmpEntry[0];
+	_palData[idx2 * 3 + 1] = tmpEntry[1];
+	_palData[idx2 * 3 + 2] = tmpEntry[2];
+}
+
+void Pal::updatePalette(int delta, const Pal &targetPal, bool shouldInstallPalette) {
+	for (int i = 0; i < DARKSEED_PAL_SIZE; i++) {
+		int c = _palData[i] + delta;
+		if (c < 0) {
+			c = 0;
+		} else if (delta > 0 && c > targetPal._palData[i]) {
+			c = targetPal._palData[i];
+		}
+		_palData[i] = (uint8)c;
+	}
+	if (shouldInstallPalette) {
+		installPalette();
+	}
+}
+
+void Pal::installPalette() const {
+	g_system->getPaletteManager()->setPalette(_palData, 0, DARKSEED_NUM_PAL_ENTRIES);
+}
+
+} // namespace Darkseed