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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 "gob/gob.h"
#include "gob/palanim.h"
#include "gob/global.h"
#include "gob/util.h"
#include "gob/video.h"
namespace Gob {
PalAnim::PalAnim(GobEngine *vm) : _vm(vm) {
_fadeValue = 1;
for (int i = 0; i < 256; i++) {
_toFadeRed[i] = 0;
_toFadeGreen[i] = 0;
_toFadeBlue[i] = 0;
}
_palArray[0] = _vm->_global->_redPalette;
_palArray[1] = _vm->_global->_greenPalette;
_palArray[2] = _vm->_global->_bluePalette;
_fadeArray[0] = _toFadeRed;
_fadeArray[1] = _toFadeGreen;
_fadeArray[2] = _toFadeBlue;
}
char PalAnim::fadeColor(int16 from, int16 to) {
if ((from - _fadeValue) > to)
return from - _fadeValue;
else if ((from + _fadeValue) < to)
return from + _fadeValue;
else return to;
}
bool PalAnim::fadeStepColor(int color) {
bool stop = true;
char colors[3];
for (int i = 0; i < 16; i++) {
colors[0] = _palArray[0][i];
colors[1] = _palArray[1][i];
colors[2] = _palArray[2][i];
colors[color] = fadeColor(_palArray[color][i], _fadeArray[color][i]);
_vm->_video->setPalElem(i, colors[0], colors[1], colors[2],
-1, _vm->_global->_videoMode);
if (_palArray[color][i] != _fadeArray[color][i])
stop = false;
}
return stop;
}
bool PalAnim::fadeStep(int16 oper) {
bool stop = true;
if (oper == 0) {
int colorCount = _vm->_global->_setAllPalette ? _vm->_global->_colorCount : 256;
for (int i = 0; i < colorCount; i++) {
byte newRed = fadeColor(_vm->_global->_redPalette [i], _toFadeRed [i]);
byte newGreen = fadeColor(_vm->_global->_greenPalette[i], _toFadeGreen[i]);
byte newBlue = fadeColor(_vm->_global->_bluePalette [i], _toFadeBlue [i]);
if ((_vm->_global->_redPalette [i] != newRed ) ||
(_vm->_global->_greenPalette[i] != newGreen) ||
(_vm->_global->_bluePalette [i] != newBlue)) {
_vm->_video->setPalElem(i, newRed, newGreen, newBlue, 0, 0x13);
_vm->_global->_redPalette [i] = newRed;
_vm->_global->_greenPalette[i] = newGreen;
_vm->_global->_bluePalette [i] = newBlue;
stop = false;
}
}
} else if ((oper > 0) && (oper < 4))
stop = fadeStepColor(oper - 1);
return stop;
}
void PalAnim::fade(Video::PalDesc *palDesc, int16 fadeV, int16 allColors) {
bool stop;
if (_vm->shouldQuit())
return;
_fadeValue = (fadeV < 0) ? -fadeV : 2;
int colorCount = _vm->_global->_setAllPalette ? _vm->_global->_colorCount : 256;
for (int i = 0; i < colorCount; i++) {
_toFadeRed [i] = (palDesc == 0) ? 0 : palDesc->vgaPal[i].red;
_toFadeGreen[i] = (palDesc == 0) ? 0 : palDesc->vgaPal[i].green;
_toFadeBlue [i] = (palDesc == 0) ? 0 : palDesc->vgaPal[i].blue;
}
if (allColors == 0) {
do {
stop = fadeStep(0);
_vm->_video->waitRetrace();
if (fadeV > 0)
_vm->_util->delay(fadeV);
} while (!stop);
if (palDesc)
_vm->_video->setFullPalette(palDesc);
else
_vm->_util->clearPalette();
}
if (allColors == 1) {
do {
_vm->_video->waitRetrace();
stop = fadeStep(1);
} while (!stop);
do {
_vm->_video->waitRetrace();
stop = fadeStep(2);
} while (!stop);
do {
_vm->_video->waitRetrace();
stop = fadeStep(3);
} while (!stop);
if (palDesc)
_vm->_video->setFullPalette(palDesc);
else
_vm->_util->clearPalette();
}
}
} // End of namespace Gob
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