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Diffstat (limited to 'engines/sci/graphics/remap.cpp')
| -rw-r--r-- | engines/sci/graphics/remap.cpp | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/engines/sci/graphics/remap.cpp b/engines/sci/graphics/remap.cpp new file mode 100644 index 0000000000..2abf03ea29 --- /dev/null +++ b/engines/sci/graphics/remap.cpp @@ -0,0 +1,99 @@ +/* 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 "sci/sci.h" +#include "sci/graphics/palette.h" +#include "sci/graphics/remap.h" +#include "sci/graphics/screen.h" + +namespace Sci { + +GfxRemap::GfxRemap(GfxPalette *palette) + : _palette(palette) { + _remapOn = false; + resetRemapping(); +} + +byte GfxRemap::remapColor(byte remappedColor, byte screenColor) { + assert(_remapOn); + if (_remappingType[remappedColor] == kRemapByRange) + return _remappingByRange[screenColor]; + else if (_remappingType[remappedColor] == kRemapByPercent) + return _remappingByPercent[screenColor]; + else + error("remapColor(): Color %d isn't remapped", remappedColor); + + return 0; // should never reach here +} + +void GfxRemap::resetRemapping() { + _remapOn = false; + _remappingPercentToSet = 0; + + for (int i = 0; i < 256; i++) { + _remappingType[i] = kRemapNone; + _remappingByPercent[i] = i; + _remappingByRange[i] = i; + } +} + +void GfxRemap::setRemappingPercent(byte color, byte percent) { + _remapOn = true; + + // We need to defer the setup of the remapping table every time the screen + // palette is changed, so that kernelFindColor() can find the correct + // colors. Set it once here, in case the palette stays the same and update + // it on each palette change by copySysPaletteToScreen(). + _remappingPercentToSet = percent; + + for (int i = 0; i < 256; i++) { + byte r = _palette->_sysPalette.colors[i].r * _remappingPercentToSet / 100; + byte g = _palette->_sysPalette.colors[i].g * _remappingPercentToSet / 100; + byte b = _palette->_sysPalette.colors[i].b * _remappingPercentToSet / 100; + _remappingByPercent[i] = _palette->kernelFindColor(r, g, b); + } + + _remappingType[color] = kRemapByPercent; +} + +void GfxRemap::setRemappingRange(byte color, byte from, byte to, byte base) { + _remapOn = true; + + for (int i = from; i <= to; i++) { + _remappingByRange[i] = i + base; + } + + _remappingType[color] = kRemapByRange; +} + +void GfxRemap::updateRemapping() { + // Check if we need to reset remapping by percent with the new colors. + if (_remappingPercentToSet) { + for (int i = 0; i < 256; i++) { + byte r = _palette->_sysPalette.colors[i].r * _remappingPercentToSet / 100; + byte g = _palette->_sysPalette.colors[i].g * _remappingPercentToSet / 100; + byte b = _palette->_sysPalette.colors[i].b * _remappingPercentToSet / 100; + _remappingByPercent[i] = _palette->kernelFindColor(r, g, b); + } + } +} +} // End of namespace Sci |