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This commit is contained in:
Oleg Korshul
2023-06-11 00:44:33 +03:00
parent b5e84edbe7
commit 1397f4f150
1 changed files with 9 additions and 0 deletions
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9
DesktopEditor/agg-2.4/include/agg_pixfmt_rgba.h
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@ -194,6 +194,15 @@ namespace agg
calc_type b = p[Order::B];
calc_type a = p[Order::A];
if (a == base_mask)
{
p[Order::R] = (value_type)(((cr - r) * alpha + (r << base_shift)) >> base_shift);
p[Order::G] = (value_type)(((cg - g) * alpha + (g << base_shift)) >> base_shift);
p[Order::B] = (value_type)(((cb - b) * alpha + (b << base_shift)) >> base_shift);
p[Order::A] = (value_type)((alpha + a) - ((alpha * a + base_mask) >> base_shift));
return;
}
p[Order::A] = (value_type)((alpha + a) - ((alpha * a + base_mask) >> base_shift));
p[Order::R] = (value_type)((alpha * cr + a * r - ((a * r * alpha + base_mask) >> base_shift)) / p[Order::A]);
p[Order::G] = (value_type)((alpha * cg + a * r - ((a * g * alpha + base_mask) >> base_shift)) / p[Order::A]);