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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 "neverhood/palette.h"
#include "neverhood/resource.h"
#include "neverhood/screen.h"
namespace Neverhood {
// Palette
Palette::Palette(NeverhoodEngine *vm) : Entity(vm, 0) {
init();
memset(_palette, 0, 1024);
SetUpdateHandler(&Palette::update);
}
Palette::Palette(NeverhoodEngine *vm, byte *palette) : Entity(vm, 0) {
init();
memcpy(_palette, palette, 1024);
SetUpdateHandler(&Palette::update);
}
Palette::Palette(NeverhoodEngine *vm, const char *filename) : Entity(vm, 0) {
PaletteResource paletteResource(_vm);
init();
paletteResource.load(calcHash(filename));
paletteResource.copyPalette(_palette);
SetUpdateHandler(&Palette::update);
}
Palette::Palette(NeverhoodEngine *vm, uint32 fileHash) : Entity(vm, 0) {
PaletteResource paletteResource(_vm);
init();
paletteResource.load(fileHash);
paletteResource.copyPalette(_palette);
SetUpdateHandler(&Palette::update);
}
Palette::~Palette() {
_vm->_screen->unsetPaletteData(_palette);
delete[] _palette;
delete[] _basePalette;
}
void Palette::init() {
_status = 0;
_palette = new byte[1024];
_basePalette = new byte[1024];
_palCounter = 0;
_fadeToR = 0;
_fadeToG = 0;
_fadeToB = 0;
_fadeStep = 0;
}
void Palette::usePalette() {
_vm->_screen->setPaletteData(_palette);
}
void Palette::addPalette(const char *filename, int toIndex, int count, int fromIndex) {
addPalette(calcHash(filename), toIndex, count, fromIndex);
}
void Palette::addPalette(uint32 fileHash, int toIndex, int count, int fromIndex) {
PaletteResource paletteResource(_vm);
if (toIndex + count > 256)
count = 256 - toIndex;
paletteResource.load(fileHash);
memcpy(_palette + toIndex * 4, paletteResource.palette() + fromIndex * 4, count * 4);
_vm->_screen->testPalette(_palette);
}
void Palette::addBasePalette(uint32 fileHash, int toIndex, int count, int fromIndex) {
PaletteResource paletteResource(_vm);
if (toIndex + count > 256)
count = 256 - toIndex;
paletteResource.load(fileHash);
memcpy(_basePalette + toIndex * 4, paletteResource.palette() + fromIndex * 4, count * 4);
}
void Palette::copyPalette(const byte *palette, int toIndex, int count, int fromIndex) {
if (toIndex + count > 256)
count = 256 - toIndex;
memcpy(_palette + toIndex * 4, palette + fromIndex * 4, count * 4);
_vm->_screen->testPalette(_palette);
}
void Palette::copyBasePalette(int toIndex, int count, int fromIndex) {
if (toIndex + count > 256)
count = 256 - toIndex;
memcpy(_basePalette + toIndex * 4, _palette + fromIndex * 4, count * 4);
}
void Palette::startFadeToBlack(int counter) {
debug(2, "Palette::startFadeToBlack(%d)", counter);
if (counter == 0)
counter = 1;
_fadeToR = 0;
_fadeToG = 0;
_fadeToB = 0;
_palCounter = counter;
_fadeStep = calculateFadeStep(counter);
_status = 1;
}
void Palette::startFadeToWhite(int counter) {
debug(2, "Palette::startFadeToWhite(%d)", counter);
if (counter == 0)
counter = 1;
_fadeToR = 255;
_fadeToG = 255;
_fadeToB = 255;
_palCounter = counter;
_fadeStep = calculateFadeStep(counter);
_status = 1;
}
void Palette::startFadeToPalette(int counter) {
debug(2, "Palette::startFadeToPalette(%d)", counter);
if (counter == 0)
counter = 1;
_palCounter = counter;
_fadeStep = calculateFadeStep(counter);
_status = 2;
}
void Palette::fillBaseWhite(int index, int count) {
if (index + count > 256)
count = 256 - index;
for (int i = 0; i < count; i++) {
_basePalette[(i + index) * 4 + 0] = 0xFF;
_basePalette[(i + index) * 4 + 1] = 0xFF;
_basePalette[(i + index) * 4 + 2] = 0xFF;
_basePalette[(i + index) * 4 + 3] = 0;
}
}
void Palette::fillBaseBlack(int index, int count) {
if (index + count > 256)
count = 256 - index;
for (int i = 0; i < count; i++) {
_basePalette[(i + index) * 4 + 0] = 0;
_basePalette[(i + index) * 4 + 1] = 0;
_basePalette[(i + index) * 4 + 2] = 0;
_basePalette[(i + index) * 4 + 3] = 0;
}
}
void Palette::copyToBasePalette(byte *palette) {
memcpy(_basePalette, palette, 256 * 4);
}
void Palette::update() {
debug(2, "Palette::update() _status = %d", _status);
if (_status == 1) {
if (_palCounter > 1) {
for (int i = 0; i < 256; i++)
fadeColor(_palette + i * 4, _fadeToR, _fadeToG, _fadeToB);
_vm->_screen->testPalette(_palette);
_palCounter--;
} else {
memset(_palette, 0, 1024);
_status = 0;
}
} else if (_status == 2) {
if (_palCounter > 1) {
for (int i = 0; i < 256; i++)
fadeColor(_palette + i * 4, _basePalette[i * 4 + 0], _basePalette[i * 4 + 1], _basePalette[i * 4 + 2]);
_vm->_screen->testPalette(_palette);
_palCounter--;
} else {
memcpy(_palette, _basePalette, 256 * 4);
_status = 0;
}
}
}
void Palette::fadeColor(byte *rgb, byte toR, byte toG, byte toB) {
#define FADE(color, toColor) color += _fadeStep < toColor - color ? _fadeStep : (-_fadeStep <= toColor - color ? toColor - color : -_fadeStep)
FADE(rgb[0], toR);
FADE(rgb[1], toG);
FADE(rgb[2], toB);
#undef FADE
}
int Palette::calculateFadeStep(int counter) {
int fadeStep = 255 / counter;
if (255 % counter)
fadeStep++;
return fadeStep;
}
} // End of namespace Neverhood
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