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Diffstat (limited to 'engines/gob/palanim.cpp')
| -rw-r--r-- | engines/gob/palanim.cpp | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/engines/gob/palanim.cpp b/engines/gob/palanim.cpp new file mode 100644 index 0000000000..7946639c4e --- /dev/null +++ b/engines/gob/palanim.cpp @@ -0,0 +1,227 @@ +/* ScummVM - Scumm Interpreter + * Copyright (C) 2004 Ivan Dubrov + * 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 |