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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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ *
+ */
+
+#include "graphics/palette.h"
+
+#include "toltecs/toltecs.h"
+#include "toltecs/palette.h"
+#include "toltecs/resource.h"
+
+namespace Toltecs {
+
+Palette::Palette(ToltecsEngine *vm) : _vm(vm) {
+ clearFragments();
+
+ 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();
+}
+
+void Palette::buildColorTransTable(byte limit, int8 deltaValue, byte mask) {
+ byte r = 0, g = 0, b = 0;
+
+ mask &= 7;
+
+ for (int i = 0; i < 256; i++) {
+
+ if (deltaValue < 0) {
+ // TODO (probably unused)
+ warning("Palette::buildColorTransTable(%d, %d, %02X) not yet implemented!", limit, deltaValue, mask);
+ } else {
+ 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;
+ }
+ }
+
+ 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;
+ }
+ }
+
+ _colorTransTable[i] = bestIndex;
+
+ }
+}
+
+void Palette::buildColorTransTable2(byte limit, int8 deltaValue, byte mask) {
+ // TODO
+}
+
+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