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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/engine/features.h"
#include "sci/graphics/palette32.h"
#include "sci/graphics/remap32.h"
namespace Sci {
#pragma mark SingleRemap
void SingleRemap::reset() {
_lastPercent = 100;
_lastGray = 0;
const uint8 remapStartColor = g_sci->_gfxRemap32->getStartColor();
const Palette ¤tPalette = g_sci->_gfxPalette32->getCurrentPalette();
for (uint i = 0; i < remapStartColor; ++i) {
const Color &color = currentPalette.colors[i];
_remapColors[i] = i;
_originalColors[i] = color;
_originalColorsChanged[i] = true;
_idealColors[i] = color;
_idealColorsChanged[i] = false;
_matchDistances[i] = 0;
}
}
bool SingleRemap::update() {
switch (_type) {
case kRemapNone:
break;
case kRemapByRange:
return updateRange();
case kRemapByPercent:
return updateBrightness();
case kRemapToGray:
return updateSaturation();
case kRemapToPercentGray:
return updateSaturationAndBrightness();
default:
error("Illegal remap type %d", _type);
}
return false;
}
bool SingleRemap::updateRange() {
const uint8 remapStartColor = g_sci->_gfxRemap32->getStartColor();
bool updated = false;
for (uint i = 0; i < remapStartColor; ++i) {
uint8 targetColor;
if (_from <= i && i <= _to) {
targetColor = i + _delta;
} else {
targetColor = i;
}
if (_remapColors[i] != targetColor) {
updated = true;
_remapColors[i] = targetColor;
}
_originalColorsChanged[i] = true;
}
return updated;
}
bool SingleRemap::updateBrightness() {
const uint8 remapStartColor = g_sci->_gfxRemap32->getStartColor();
const Palette &nextPalette = g_sci->_gfxPalette32->getNextPalette();
for (uint i = 1; i < remapStartColor; ++i) {
Color color(nextPalette.colors[i]);
if (_originalColors[i] != color) {
_originalColorsChanged[i] = true;
_originalColors[i] = color;
}
if (_percent != _lastPercent || _originalColorsChanged[i]) {
// SSCI checked if percent was over 100 and only then clipped
// values, but we always unconditionally ensure the result is in the
// correct range for simplicity's sake
color.r = MIN(255, (uint16)color.r * _percent / 100);
color.g = MIN(255, (uint16)color.g * _percent / 100);
color.b = MIN(255, (uint16)color.b * _percent / 100);
if (_idealColors[i] != color) {
_idealColorsChanged[i] = true;
_idealColors[i] = color;
}
}
}
const bool updated = apply();
Common::fill(_originalColorsChanged, _originalColorsChanged + remapStartColor, false);
Common::fill(_idealColorsChanged, _idealColorsChanged + remapStartColor, false);
_lastPercent = _percent;
return updated;
}
bool SingleRemap::updateSaturation() {
const uint8 remapStartColor = g_sci->_gfxRemap32->getStartColor();
const Palette ¤tPalette = g_sci->_gfxPalette32->getCurrentPalette();
for (uint i = 1; i < remapStartColor; ++i) {
Color color(currentPalette.colors[i]);
if (_originalColors[i] != color) {
_originalColorsChanged[i] = true;
_originalColors[i] = color;
}
if (_gray != _lastGray || _originalColorsChanged[i]) {
const int luminosity = (((color.r * 77) + (color.g * 151) + (color.b * 28)) >> 8) * _percent / 100;
color.r = MIN(255, color.r - ((color.r - luminosity) * _gray / 100));
color.g = MIN(255, color.g - ((color.g - luminosity) * _gray / 100));
color.b = MIN(255, color.b - ((color.b - luminosity) * _gray / 100));
if (_idealColors[i] != color) {
_idealColorsChanged[i] = true;
_idealColors[i] = color;
}
}
}
const bool updated = apply();
Common::fill(_originalColorsChanged, _originalColorsChanged + remapStartColor, false);
Common::fill(_idealColorsChanged, _idealColorsChanged + remapStartColor, false);
_lastGray = _gray;
return updated;
}
bool SingleRemap::updateSaturationAndBrightness() {
const uint8 remapStartColor = g_sci->_gfxRemap32->getStartColor();
const Palette ¤tPalette = g_sci->_gfxPalette32->getCurrentPalette();
for (uint i = 1; i < remapStartColor; i++) {
Color color(currentPalette.colors[i]);
if (_originalColors[i] != color) {
_originalColorsChanged[i] = true;
_originalColors[i] = color;
}
if (_percent != _lastPercent || _gray != _lastGray || _originalColorsChanged[i]) {
const int luminosity = (((color.r * 77) + (color.g * 151) + (color.b * 28)) >> 8) * _percent / 100;
color.r = MIN(255, color.r - ((color.r - luminosity) * _gray) / 100);
color.g = MIN(255, color.g - ((color.g - luminosity) * _gray) / 100);
color.b = MIN(255, color.b - ((color.b - luminosity) * _gray) / 100);
if (_idealColors[i] != color) {
_idealColorsChanged[i] = true;
_idealColors[i] = color;
}
}
}
const bool updated = apply();
Common::fill(_originalColorsChanged, _originalColorsChanged + remapStartColor, false);
Common::fill(_idealColorsChanged, _idealColorsChanged + remapStartColor, false);
_lastPercent = _percent;
_lastGray = _gray;
return updated;
}
bool SingleRemap::apply() {
const GfxRemap32 *const gfxRemap32 = g_sci->_gfxRemap32;
const uint8 remapStartColor = gfxRemap32->getStartColor();
// Blocked colors are not allowed to be used as target colors for the remap
bool blockedColors[237];
Common::fill(blockedColors, &blockedColors[237], false);
const bool *const paletteCycleMap = g_sci->_gfxPalette32->getCycleMap();
const int16 blockedRangeCount = gfxRemap32->getBlockedRangeCount();
if (blockedRangeCount) {
const uint8 blockedRangeStart = gfxRemap32->getBlockedRangeStart();
Common::fill(blockedColors + blockedRangeStart, blockedColors + blockedRangeStart + blockedRangeCount, true);
}
for (uint i = 0; i < remapStartColor; ++i) {
if (paletteCycleMap[i]) {
blockedColors[i] = true;
}
}
// SSCI did a loop over colors here to create a new array of updated,
// unblocked colors, but then never used it
bool updated = false;
for (uint i = 1; i < remapStartColor; ++i) {
int distance;
if (!_idealColorsChanged[i] && !_originalColorsChanged[_remapColors[i]]) {
continue;
}
if (
_idealColorsChanged[i] &&
_originalColorsChanged[_remapColors[i]] &&
_matchDistances[i] < 100 &&
colorDistance(_idealColors[i], _originalColors[_remapColors[i]]) <= _matchDistances[i]
) {
continue;
}
const int16 bestColor = matchColor(_idealColors[i], _matchDistances[i], distance, blockedColors);
if (bestColor != -1 && _remapColors[i] != bestColor) {
updated = true;
_remapColors[i] = bestColor;
_matchDistances[i] = distance;
}
}
return updated;
}
int SingleRemap::colorDistance(const Color &a, const Color &b) const {
int channelDistance = a.r - b.r;
int distance = channelDistance * channelDistance;
channelDistance = a.g - b.g;
distance += channelDistance * channelDistance;
channelDistance = a.b - b.b;
distance += channelDistance * channelDistance;
return distance;
}
int16 SingleRemap::matchColor(const Color &color, const int minimumDistance, int &outDistance, const bool *const blockedIndexes) const {
int16 bestIndex = -1;
int bestDistance = 0xFFFFF;
int distance = minimumDistance;
const Palette &nextPalette = g_sci->_gfxPalette32->getNextPalette();
for (uint i = 0, channelDistance; i < g_sci->_gfxRemap32->getStartColor(); ++i) {
if (blockedIndexes[i]) {
continue;
}
distance = nextPalette.colors[i].r - color.r;
distance *= distance;
if (bestDistance <= distance) {
continue;
}
channelDistance = nextPalette.colors[i].g - color.g;
distance += channelDistance * channelDistance;
if (bestDistance <= distance) {
continue;
}
channelDistance = nextPalette.colors[i].b - color.b;
distance += channelDistance * channelDistance;
if (bestDistance <= distance) {
continue;
}
bestDistance = distance;
bestIndex = i;
}
// This value is only valid if the last index to perform a distance
// calculation was the best index
outDistance = distance;
return bestIndex;
}
#pragma mark -
#pragma mark GfxRemap32
GfxRemap32::GfxRemap32() :
_needsUpdate(false),
_blockedRangeStart(0),
_blockedRangeCount(0),
_numActiveRemaps(0) {
// Mac SSCI has one less remap entry than PC. Mac games expand the normal
// range from 236 entries to 237 and uses the extra entry (236) for black
// instead of 0. This was done to avoid conflicting with the operating
// system's palette which always uses entry 0 for white.
if (g_sci->getPlatform() == Common::kPlatformMacintosh) {
_remapStartColor = 237;
} else {
_remapStartColor = 236;
}
if (g_sci->_features->hasMidPaletteCode()) {
_remaps.resize(9);
} else {
_remaps.resize(19);
}
_remapEndColor = 236 + _remaps.size() - 1;
}
void GfxRemap32::remapOff(const uint8 color) {
if (color == 0) {
remapAllOff();
return;
}
// SSCI simply ignored invalid input values, but we at least give a warning
// so games can be investigated for script bugs
if (color < _remapStartColor || color > _remapEndColor) {
warning("GfxRemap32::remapOff: %d out of remap range", color);
return;
}
const uint8 index = _remapEndColor - color;
SingleRemap &singleRemap = _remaps[index];
singleRemap._type = kRemapNone;
--_numActiveRemaps;
_needsUpdate = true;
}
void GfxRemap32::remapAllOff() {
for (uint i = 0, len = _remaps.size(); i < len; ++i) {
_remaps[i]._type = kRemapNone;
}
_numActiveRemaps = 0;
_needsUpdate = true;
}
void GfxRemap32::remapByRange(const uint8 color, const int16 from, const int16 to, const int16 delta) {
// SSCI simply ignored invalid input values, but we at least give a warning
// so games can be investigated for script bugs
if (color < _remapStartColor || color > _remapEndColor) {
warning("GfxRemap32::remapByRange: %d out of remap range", color);
return;
}
if (from < 0) {
warning("GfxRemap32::remapByRange: attempt to remap negative color %d", from);
return;
}
if (to >= _remapStartColor) {
warning("GfxRemap32::remapByRange: attempt to remap into the remap zone at %d", to);
return;
}
const uint8 index = _remapEndColor - color;
SingleRemap &singleRemap = _remaps[index];
if (singleRemap._type == kRemapNone) {
++_numActiveRemaps;
singleRemap.reset();
}
singleRemap._from = from;
singleRemap._to = to;
singleRemap._delta = delta;
singleRemap._type = kRemapByRange;
_needsUpdate = true;
}
void GfxRemap32::remapByPercent(const uint8 color, const int16 percent) {
// SSCI simply ignored invalid input values, but we at least give a warning
// so games can be investigated for script bugs
if (color < _remapStartColor || color > _remapEndColor) {
warning("GfxRemap32::remapByPercent: %d out of remap range", color);
return;
}
const uint8 index = _remapEndColor - color;
SingleRemap &singleRemap = _remaps[index];
if (singleRemap._type == kRemapNone) {
++_numActiveRemaps;
singleRemap.reset();
}
singleRemap._percent = percent;
singleRemap._type = kRemapByPercent;
_needsUpdate = true;
}
void GfxRemap32::remapToGray(const uint8 color, const int8 gray) {
// SSCI simply ignored invalid input values, but we at least give a warning
// so games can be investigated for script bugs
if (color < _remapStartColor || color > _remapEndColor) {
warning("GfxRemap32::remapToGray: %d out of remap range", color);
return;
}
if (gray < 0 || gray > 100) {
error("RemapToGray percent out of range; gray = %d", gray);
}
const uint8 index = _remapEndColor - color;
SingleRemap &singleRemap = _remaps[index];
if (singleRemap._type == kRemapNone) {
++_numActiveRemaps;
singleRemap.reset();
}
singleRemap._gray = gray;
singleRemap._type = kRemapToGray;
_needsUpdate = true;
}
void GfxRemap32::remapToPercentGray(const uint8 color, const int16 gray, const int16 percent) {
// SSCI simply ignored invalid input values, but we at least give a warning
// so games can be investigated for script bugs
if (color < _remapStartColor || color > _remapEndColor) {
warning("GfxRemap32::remapToPercentGray: %d out of remap range", color);
return;
}
const uint8 index = _remapEndColor - color;
SingleRemap &singleRemap = _remaps[index];
if (singleRemap._type == kRemapNone) {
++_numActiveRemaps;
singleRemap.reset();
}
singleRemap._percent = percent;
singleRemap._gray = gray;
singleRemap._type = kRemapToPercentGray;
_needsUpdate = true;
}
void GfxRemap32::blockRange(const uint8 from, const int16 count) {
_blockedRangeStart = from;
_blockedRangeCount = count;
}
bool GfxRemap32::remapAllTables(const bool paletteUpdated) {
if (!_needsUpdate && !paletteUpdated) {
return false;
}
bool updated = false;
for (SingleRemapsList::iterator it = _remaps.begin(); it != _remaps.end(); ++it) {
if (it->_type != kRemapNone) {
updated |= it->update();
}
}
_needsUpdate = false;
return updated;
}
} // End of namespace Sci
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