scummvm/engines/gob/palanim.cpp

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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004 Ivan Dubrov
2006-01-18 17:39:49 +00:00
* Copyright (C) 2004-2006 The ScummVM project
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "gob/gob.h"
#include "gob/video.h"
#include "gob/util.h"
#include "gob/global.h"
#include "gob/palanim.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;
}
}
char PalAnim::fadeColor(char from, char to) {
if ((int16)from - _fadeValue > (int16)to)
return from - _fadeValue;
else if ((int16)from + _fadeValue < (int16)to)
return from + _fadeValue;
else
return to;
}
char PalAnim::fadeStep(int16 oper) {
byte newRed;
byte newGreen;
byte newBlue;
char stop;
int16 i;
if (_vm->_global->_colorCount != 256)
error("fadeStep: Only 256 color mode is supported!");
if (oper == 0) {
stop = 1;
if (_vm->_global->_setAllPalette) {
if (_vm->_global->_inVM != 0)
error("fade: _vm->_global->_inVM != 0 not supported.");
for (i = 0; i < 256; i++) {
newRed = fadeColor(_vm->_global->_redPalette[i], _toFadeRed[i]);
newGreen = fadeColor(_vm->_global->_greenPalette[i], _toFadeGreen[i]);
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 = 0;
}
}
} else {
for (i = 0; i < 16; i++) {
_vm->_video->setPalElem(i,
fadeColor(_vm->_global->_redPalette[i],
_toFadeRed[i]),
fadeColor(_vm->_global->_greenPalette[i],
_toFadeGreen[i]),
fadeColor(_vm->_global->_bluePalette[i],
_toFadeBlue[i]), -1, _vm->_global->_videoMode);
if (_vm->_global->_redPalette[i] != _toFadeRed[i] ||
_vm->_global->_greenPalette[i] != _toFadeGreen[i] ||
_vm->_global->_bluePalette[i] != _toFadeBlue[i])
stop = 0;
}
}
return stop;
} else if (oper == 1) {
stop = 1;
for (i = 0; i < 16; i++) {
_vm->_video->setPalElem(i,
fadeColor(_vm->_global->_redPalette[i], _toFadeRed[i]),
_vm->_global->_greenPalette[i], _vm->_global->_bluePalette[i], -1, _vm->_global->_videoMode);
if (_vm->_global->_redPalette[i] != _toFadeRed[i])
stop = 0;
}
return stop;
} else if (oper == 2) {
stop = 1;
for (i = 0; i < 16; i++) {
_vm->_video->setPalElem(i,
_vm->_global->_redPalette[i],
fadeColor(_vm->_global->_greenPalette[i], _toFadeGreen[i]),
_vm->_global->_bluePalette[i], -1, _vm->_global->_videoMode);
if (_vm->_global->_greenPalette[i] != _toFadeGreen[i])
stop = 0;
}
return stop;
} else if (oper == 3) {
stop = 1;
for (i = 0; i < 16; i++) {
_vm->_video->setPalElem(i,
_vm->_global->_redPalette[i],
_vm->_global->_greenPalette[i],
fadeColor(_vm->_global->_bluePalette[i], _toFadeBlue[i]),
-1, _vm->_global->_videoMode);
if (_vm->_global->_bluePalette[i] != _toFadeBlue[i])
stop = 0;
}
return stop;
}
return 1;
}
void PalAnim::fade(Video::PalDesc *palDesc, int16 fadeV, int16 allColors) {
char stop;
int16 i;
if (fadeV < 0)
_fadeValue = -fadeV;
else
_fadeValue = 2;
if (_vm->_global->_colorCount < 256) {
if (palDesc != 0)
_vm->_video->setFullPalette(palDesc);
return;
}
if (_vm->_global->_setAllPalette == 0) {
if (palDesc == 0) {
for (i = 0; i < 16; i++) {
_toFadeRed[i] = 0;
_toFadeGreen[i] = 0;
_toFadeBlue[i] = 0;
}
} else {
for (i = 0; i < 16; i++) {
_toFadeRed[i] = palDesc->vgaPal[i].red;
_toFadeGreen[i] = palDesc->vgaPal[i].green;
_toFadeBlue[i] = palDesc->vgaPal[i].blue;
}
}
} else {
if (_vm->_global->_inVM != 0)
error("fade: _vm->_global->_inVM != 0 is not supported");
if (palDesc == 0) {
for (i = 0; i < 256; i++) {
_toFadeRed[i] = 0;
_toFadeGreen[i] = 0;
_toFadeBlue[i] = 0;
}
} else {
for (i = 0; i < 256; i++) {
_toFadeRed[i] = palDesc->vgaPal[i].red;
_toFadeGreen[i] = palDesc->vgaPal[i].green;
_toFadeBlue[i] = palDesc->vgaPal[i].blue;
}
}
}
if (allColors == 0) {
do {
_vm->_video->waitRetrace(_vm->_global->_videoMode);
stop = fadeStep(0);
if (fadeV > 0)
_vm->_util->delay(fadeV);
} while (stop == 0);
if (palDesc != 0)
_vm->_video->setFullPalette(palDesc);
else
_vm->_util->clearPalette();
}
if (allColors == 1) {
do {
_vm->_video->waitRetrace(_vm->_global->_videoMode);
stop = fadeStep(1);
} while (stop == 0);
do {
_vm->_video->waitRetrace(_vm->_global->_videoMode);
stop = fadeStep(2);
} while (stop == 0);
do {
_vm->_video->waitRetrace(_vm->_global->_videoMode);
stop = fadeStep(3);
} while (stop == 0);
if (palDesc != 0)
_vm->_video->setFullPalette(palDesc);
else
_vm->_util->clearPalette();
}
}
} // End of namespace Gob