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engines/toltecs/palette.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 "toltecs/toltecs.h"
+#include "toltecs/palette.h"
+#include "toltecs/resource.h"
+
+namespace Toltecs {
+
+Palette::Palette(ToltecsEngine *vm) : _vm(vm) {
+	clearFragments();
+
+	memset(_mainPalette, 0, sizeof(_mainPalette));
+	memset(_animPalette, 0, sizeof(_animPalette));
+	memset(_colorTransTable, 0, sizeof(_colorTransTable));
+}
+
+Palette::~Palette() {
+}
+
+void Palette::setFullPalette(byte *palette) {
+	byte colors[768];
+	for (int i = 0; i < 256; i++) {
+		colors[i * 3 + 0] = palette[i * 3 + 0] << 2;
+		colors[i * 3 + 1] = palette[i * 3 + 1] << 2;
+		colors[i * 3 + 2] = palette[i * 3 + 2] << 2;
+	}
+	_vm->_system->getPaletteManager()->setPalette((const byte *)colors, 0, 256);
+	_vm->_system->updateScreen();
+}
+
+void Palette::getFullPalette(byte *palette) {
+	byte colors[768];
+	_vm->_system->getPaletteManager()->grabPalette(colors, 0, 256);
+	for (int i = 0; i < 256; i++) {
+		palette[i * 3 + 0] = colors[i * 3 + 0] >> 2;
+		palette[i * 3 + 1] = colors[i * 3 + 1] >> 2;
+		palette[i * 3 + 2] = colors[i * 3 + 2] >> 2;
+	}
+}
+
+void Palette::setDeltaPalette(byte *palette, byte mask, int8 deltaValue, int16 count, int16 startIndex) {
+	byte colors[768];
+
+	byte *palPtr = palette + startIndex * 3;
+	int16 index = startIndex, colorCount = count;
+	byte rgb;
+
+	count++;
+
+	_vm->_system->getPaletteManager()->grabPalette(colors, 0, 256);
+
+	deltaValue *= -1;
+
+	while (count--) {
+		rgb = *palPtr++;
+		if (mask & 1) colors[index * 3 + 0] = CLIP<int>(rgb + deltaValue, 0, 63) << 2;
+		rgb = *palPtr++;
+		if (mask & 2) colors[index * 3 + 1] = CLIP<int>(rgb + deltaValue, 0, 63) << 2;
+		rgb = *palPtr++;
+		if (mask & 4) colors[index * 3 + 2] = CLIP<int>(rgb + deltaValue, 0, 63) << 2;
+		index++;
+	}
+
+	debug(0, "startIndex = %d; colorCount = %d", startIndex, colorCount);
+
+	_vm->_system->getPaletteManager()->setPalette((const byte *)colors, 0, 256);
+}
+
+void Palette::loadAddPalette(uint resIndex, byte startIndex) {
+	Resource *paletteResource = _vm->_res->load(resIndex);
+	memcpy(&_mainPalette[startIndex * 3], paletteResource->data, paletteResource->size);
+}
+
+void Palette::loadAddPaletteFrom(byte *source, byte startIndex, byte count) {
+	memcpy(&_mainPalette[startIndex * 3], source, count * 3);
+}
+
+void Palette::addFragment(uint resIndex, int16 id) {
+	debug(0, "Palette::addFragment(%d, %d)", resIndex, id);
+
+	Resource *fragmentResource = _vm->_res->load(resIndex);
+	byte count = fragmentResource->size / 3;
+
+	memcpy(&_mainPalette[_fragmentIndex * 3], fragmentResource->data, count * 3);
+
+	PaletteFragment fragment;
+	fragment.id = id;
+	fragment.index = _fragmentIndex;
+	fragment.count = count;
+	_fragments.push_back(fragment);
+
+	debug(0, "Palette::addFragment() index = %02X; count = %02X", fragment.index, fragment.count);
+
+	_fragmentIndex += count;
+}
+
+uint16 Palette::findFragment(int16 id) {
+	debug(0, "Palette::findFragment(%d)", id);
+
+	uint16 result = 0;
+	for (PaletteFragmentArray::iterator iter = _fragments.begin(); iter != _fragments.end(); ++iter) {
+		PaletteFragment fragment = *iter;
+		if (fragment.id == id) {
+			result = (fragment.count << 8) | fragment.index;
+			break;
+		}
+	}
+
+	debug(0, "Palette::findFragment() result = %04X", result);
+
+	return result;
+}
+
+void Palette::clearFragments() {
+	debug(0, "Palette::clearFragments()");
+	_fragmentIndex = 128;
+	_fragments.clear();
+}
+
+byte Palette::getMatchingColor(byte r, byte g, byte b) {
+	int bestIndex = 0;
+	uint16 bestMatch = 0xFFFF;
+
+	for (int j = 0; j < 256; j++) {
+		byte distance = ABS(_mainPalette[j * 3 + 0] - r) + ABS(_mainPalette[j * 3 + 1] - g) + ABS(_mainPalette[j * 3 + 2] - b);
+		byte maxColor = MAX(_mainPalette[j * 3 + 0], MAX(_mainPalette[j * 3 + 1], _mainPalette[j * 3 + 2]));
+		uint16 match = (distance << 8) | maxColor;
+		if (match < bestMatch) {
+			bestMatch = match;
+			bestIndex = j;
+		}
+	}
+
+	return bestIndex;
+}
+
+void Palette::buildColorTransTable(byte limit, int8 deltaValue, byte mask) {
+	byte r = 0, g = 0, b = 0;
+
+	mask &= 7;
+
+	if (deltaValue < 0)	// unused
+		error("buildColorTransTable called with a negative delta value(limit %d, delta %d, mask %02X)", limit, deltaValue, mask);
+
+	for (int i = 0; i < 256; i++) {
+		r = _mainPalette[i * 3 + 0];
+		g = _mainPalette[i * 3 + 1];
+		b = _mainPalette[i * 3 + 2];
+		if (MAX(r, MAX(b, g)) >= limit) {
+			if ((mask & 1) && r >= deltaValue)
+				r -= deltaValue;
+			if ((mask & 2) && g >= deltaValue)
+				g -= deltaValue;
+			if ((mask & 4) && b >= deltaValue)
+				b -= deltaValue;
+		}
+
+		_colorTransTable[i] = getMatchingColor(r, g, b);
+	}
+}
+
+void Palette::saveState(Common::WriteStream *out) {
+	// Save currently active palette
+	byte palette[768];
+	getFullPalette(palette);
+	out->write(palette, 768);
+
+	out->write(_mainPalette, 768);
+	out->write(_animPalette, 768);
+	out->write(_colorTransTable, 256);
+
+	uint16 fragmentCount = _fragments.size();
+	out->writeUint16LE(fragmentCount);
+	for (PaletteFragmentArray::iterator iter = _fragments.begin(); iter != _fragments.end(); ++iter) {
+		PaletteFragment fragment = *iter;
+		out->writeUint16LE(fragment.id);
+		out->writeByte(fragment.index);
+		out->writeByte(fragment.count);
+	}
+	out->writeByte(_fragmentIndex);
+}
+
+void Palette::loadState(Common::ReadStream *in) {
+	// Save currently active palette
+	byte palette[768];
+	in->read(palette, 768);
+	setFullPalette(palette);
+
+	in->read(_mainPalette, 768);
+	in->read(_animPalette, 768);
+	in->read(_colorTransTable, 256);
+
+	uint16 fragmentCount = in->readUint16LE();
+	_fragments.clear();
+	for (uint16 i = 0; i < fragmentCount; i++) {
+		PaletteFragment fragment;
+		fragment.id = in->readUint16LE();
+		fragment.index = in->readByte();
+		fragment.count = in->readByte();
+		_fragments.push_back(fragment);
+	}
+	_fragmentIndex = in->readByte();
+}
+
+
+} // End of namespace Toltecs