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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 "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
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