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more auto-contrast improvements

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Adam D. Ruppe 2022-10-21 17:32:32 -04:00
parent 22eac8d719
commit 772bacce42
1 changed files with 37 additions and 6 deletions
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43
terminalemulator.d
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@ -4668,15 +4668,46 @@ mixin template SdpyDraw() {
} else if(bufferForeground == bufferBackground) {
// color on itself, I want it visible too
auto hsl = toHsl(bufferForeground, true);
if(hsl[2] < 0.5)
hsl[2] += 0.5;
else
hsl[2] -= 0.5;
if(hsl[0] == 240) {
// blue is a bit special, it generally looks darker
// so we want to get very bright or very dark
if(hsl[2] < 0.7)
hsl[2] = 0.9;
else
hsl[2] = 0.1;
} else {
if(hsl[2] < 0.5)
hsl[2] += 0.5;
else
hsl[2] -= 0.5;
}
painter.outlineColor = fromHsl(hsl[0], hsl[1], hsl[2]);
} else {
auto drawColor = bufferReverse ? bufferBackground : bufferForeground;
///+
// try to ensure legible contrast with any arbitrary combination
auto bgColor = bufferReverse ? bufferForeground : bufferBackground;
auto fghsl = toHsl(drawColor, true);
auto bghsl = toHsl(bgColor, true);
if(fghsl[2] > 0.5 && bghsl[2] > 0.5) {
// bright color on bright background
painter.outlineColor = fromHsl(fghsl[0], fghsl[1], 0.2);
} else if(fghsl[2] < 0.5 && bghsl[2] < 0.5) {
// dark color on dark background
if(fghsl[0] == 240 && bghsl[0] >= 60 && bghsl[0] <= 180)
// blue on green looks dark to the algorithm but isn't really
painter.outlineColor = fromHsl(fghsl[0], fghsl[1], 0.2);
else
painter.outlineColor = fromHsl(fghsl[0], fghsl[1], 0.8);
} else {
// normal
painter.outlineColor = drawColor;
}
//+/
// normal
painter.outlineColor = bufferReverse ? bufferBackground : bufferForeground;
//painter.outlineColor = drawColor;
}
// FIXME: make sure this clips correctly