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Code Issues Releases Wiki Activity

try out some things, and comment them out

This commit is contained in:
Desour 2024-03-20 15:55:48 +01:00
parent 12e83f9425
commit 2fdf26a1ba
1 changed files with 29 additions and 11 deletions
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40
src/client/imagefilters.cpp
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@ -214,23 +214,41 @@ static void imageCleanTransparentNew(video::IImage *src, u32 threshold)
// Step 1: Scale down
auto mix4cols = [](std::array<video::SColor, 4> colors) -> video::SColor {
u32 r = 0, g = 0, b = 0, a = 0;
u32 sr = 0, sg = 0, sb = 0, sa = 0;
auto add_color = [&](video::SColor c) {
u32 alph = c.getAlpha();
r += alph * c.getRed();
g += alph * c.getGreen();
b += alph * c.getBlue();
a += alph;
sr += alph * c.getRed();
sg += alph * c.getGreen();
sb += alph * c.getBlue();
sa += alph;
};
for (auto c : colors)
add_color(c);
if (a == 0)
if (sa == 0)
return 0;
r /= a;
g /= a;
b /= a;
a = (a + 1) / 4; // +1 for better rounding // TODO: maybe always round up, to make sure colors are preserved? (+3)
return video::SColor(a, r, g, b);
//~ if (sa == 255 * 4) { // common case
//~ sr = 0, sg = 0, sb = 0;
//~ for (auto c : colors) {
//~ sr += c.getRed();
//~ sg += c.getGreen();
//~ sb += c.getBlue();
//~ }
//~ sr /= 4;
//~ sg /= 4;
//~ sb /= 4;
//~ return video::SColor(255, sr, sg, sb);
//~ }
//~ u64 d = (1 << 16) / sa;
//~ sr = (sr * d) >> 16;
//~ sg = (sg * d) >> 16;
//~ sb = (sb * d) >> 16;
//~ sa = ((sa + 1) * d) >> 16;
sr /= sa;
sg /= sa;
sb /= sa;
sa = (sa + 1) / 4; // +1 for better rounding // TODO: maybe always round up, to make sure colors are preserved? (+3)
return video::SColor(sa, sr, sg, sb);
};
for (size_t lvl = 0; lvl + 1 < levels.size(); ++lvl) {