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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(_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
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