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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004 Ivan Dubrov
* Copyright (C) 2004-2005 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "gob/gob.h"
#include "gob/video.h"
#include "gob/util.h"
#include "gob/global.h"
#include "gob/palanim.h"
namespace Gob {
int16 pal_fadeValue = 1;
byte pal_toFadeRed[256];
byte pal_toFadeGreen[256];
byte pal_toFadeBlue[256];
char pal_fadeColor(char from, char to) {
if ((int16)from - pal_fadeValue > (int16)to)
return from - pal_fadeValue;
else if ((int16)from + pal_fadeValue < (int16)to)
return from + pal_fadeValue;
else
return to;
}
char pal_fadeStep(int16 oper) {
byte newRed;
byte newGreen;
byte newBlue;
char stop;
int16 i;
if (colorCount != 256)
error("pal_fadeStep: Only 256 color mode is supported!");
if (oper == 0) {
stop = 1;
if (setAllPalette) {
if (inVM != 0)
error("pal_fade: inVM != 0 not supported.");
for (i = 0; i < 256; i++) {
newRed =
pal_fadeColor(redPalette[i],
pal_toFadeRed[i]);
newGreen =
pal_fadeColor(greenPalette[i],
pal_toFadeGreen[i]);
newBlue =
pal_fadeColor(bluePalette[i],
pal_toFadeBlue[i]);
if (redPalette[i] != newRed
|| greenPalette[i] != newGreen
|| bluePalette[i] != newBlue) {
vid_setPalElem(i, newRed, newGreen, newBlue, 0, 0x13);
redPalette[i] = newRed;
greenPalette[i] = newGreen;
bluePalette[i] = newBlue;
stop = 0;
}
}
} else {
for (i = 0; i < 16; i++) {
vid_setPalElem(i,
pal_fadeColor(redPalette[i],
pal_toFadeRed[i]),
pal_fadeColor(greenPalette[i],
pal_toFadeGreen[i]),
pal_fadeColor(bluePalette[i],
pal_toFadeBlue[i]), -1, videoMode);
if (redPalette[i] != pal_toFadeRed[i] ||
greenPalette[i] != pal_toFadeGreen[i] ||
bluePalette[i] != pal_toFadeBlue[i])
stop = 0;
}
}
return stop;
} else if (oper == 1) {
stop = 1;
for (i = 0; i < 16; i++) {
vid_setPalElem(i,
pal_fadeColor(redPalette[i], pal_toFadeRed[i]),
greenPalette[i], bluePalette[i], -1, videoMode);
if (redPalette[i] != pal_toFadeRed[i])
stop = 0;
}
return stop;
} else if (oper == 2) {
stop = 1;
for (i = 0; i < 16; i++) {
vid_setPalElem(i,
redPalette[i],
pal_fadeColor(greenPalette[i], pal_toFadeGreen[i]),
bluePalette[i], -1, videoMode);
if (greenPalette[i] != pal_toFadeGreen[i])
stop = 0;
}
return stop;
} else if (oper == 3) {
stop = 1;
for (i = 0; i < 16; i++) {
vid_setPalElem(i,
redPalette[i],
greenPalette[i],
pal_fadeColor(bluePalette[i], pal_toFadeBlue[i]),
-1, videoMode);
if (bluePalette[i] != pal_toFadeBlue[i])
stop = 0;
}
return stop;
}
return 1;
}
void pal_fade(PalDesc *palDesc, int16 fade, int16 allColors) {
char stop;
int16 i;
if (fade < 0)
pal_fadeValue = -fade;
else
pal_fadeValue = 2;
if (colorCount < 256) {
if (palDesc != 0)
vid_setFullPalette(palDesc);
return;
}
if (setAllPalette == 0) {
if (palDesc == 0) {
for (i = 0; i < 16; i++) {
pal_toFadeRed[i] = 0;
pal_toFadeGreen[i] = 0;
pal_toFadeBlue[i] = 0;
}
} else {
for (i = 0; i < 16; i++) {
pal_toFadeRed[i] = palDesc->vgaPal[i].red;
pal_toFadeGreen[i] = palDesc->vgaPal[i].green;
pal_toFadeBlue[i] = palDesc->vgaPal[i].blue;
}
}
} else {
if (inVM != 0)
error("pal_fade: inVM != 0 is not supported");
if (palDesc == 0) {
for (i = 0; i < 256; i++) {
pal_toFadeRed[i] = 0;
pal_toFadeGreen[i] = 0;
pal_toFadeBlue[i] = 0;
}
} else {
for (i = 0; i < 256; i++) {
pal_toFadeRed[i] = palDesc->vgaPal[i].red;
pal_toFadeGreen[i] = palDesc->vgaPal[i].green;
pal_toFadeBlue[i] = palDesc->vgaPal[i].blue;
}
}
}
if (allColors == 0) {
do {
if (tmpPalBuffer == 0)
vid_waitRetrace(videoMode);
stop = pal_fadeStep(0);
if (fade > 0)
util_delay(fade);
} while (stop == 0);
if (palDesc != 0)
vid_setFullPalette(palDesc);
else
util_clearPalette();
}
if (allColors == 1) {
do {
vid_waitRetrace(videoMode);
stop = pal_fadeStep(1);
} while (stop == 0);
do {
vid_waitRetrace(videoMode);
stop = pal_fadeStep(2);
} while (stop == 0);
do {
vid_waitRetrace(videoMode);
stop = pal_fadeStep(3);
} while (stop == 0);
if (palDesc != 0)
vid_setFullPalette(palDesc);
else
util_clearPalette();
}
free(tmpPalBuffer);
tmpPalBuffer = 0;
}
} // End of namespace Gob
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