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SCI/newgui: changing undithering logic again, palette now uses decoded color-combinations, fixup happens during dithering run on undithered mode

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svn-id: r44845
This commit is contained in:
Martin Kiewitz 2009-10-09 20:21:21 +00:00
parent 5801dd2064
commit 23887e9735
2 changed files with 36 additions and 17 deletions
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41
engines/sci/gui/gui_screen.cpp
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@ -222,17 +222,38 @@ void SciGuiScreen::dither() {
byte *screenPtr = _visualScreen;
byte *displayPtr = _displayScreen;
for (y = 0; y < _height; y++) {
for (x = 0; x < _width; x++) {
color = *screenPtr;
if (color & 0xF0) {
color ^= color << 4;
color = ((x^y) & 1) ? color >> 4 : color & 0x0F;
*screenPtr = color;
if (!_unditherState)
*displayPtr = color;
if (!_unditherState) {
// Do dithering on visual and display-screen
for (y = 0; y < _height; y++) {
for (x = 0; x < _width; x++) {
color = *screenPtr;
if (color & 0xF0) {
color ^= color << 4;
color = ((x^y) & 1) ? color >> 4 : color & 0x0F;
*screenPtr = color; *displayPtr = color;
}
screenPtr++; displayPtr++;
}
}
} else {
// Do dithering on visual screen and put decoded but undithered byte onto display-screen
for (y = 0; y < _height; y++) {
for (x = 0; x < _width; x++) {
color = *screenPtr;
if (color & 0xF0) {
color ^= color << 4;
// if decoded color wants do dither with black on left side, we turn it around
// otherwise the normal ega color would get used for display
if (color & 0xF0) {
*displayPtr = color;
} else {
*displayPtr = color << 4;
}
color = ((x^y) & 1) ? color >> 4 : color & 0x0F;
*screenPtr = color;
}
screenPtr++; displayPtr++;
}
screenPtr++; displayPtr++;
}
}
}