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LibGfx: Fix antialiased circles becoming too pointy at small sizes

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The issue mentioned in the previous FIXME also applied to circles,
I just had not noticed. This is still not a prefect fix rather it
just papers over it, but it now seems to render circles correctly.
This commit is contained in:
MacDue 2022-06-05 13:15:35 +01:00 • committed by Linus Groh
parent 52ee5026ea
commit 5fd3716e2f
1 changed files with 4 additions and 7 deletions
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11
Userland/Libraries/LibGfx/AntiAliasingPainter.cpp
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@ -329,13 +329,10 @@ Gfx::AntiAliasingPainter::Range Gfx::AntiAliasingPainter::draw_ellipse_part(
auto correct = [&] {
int error = y - y_hat;
if (!is_circle) {
// FIXME: For ellipses the alpha values seem too low, which
// can make them look overly pointy. This fixes that, though there's
// probably a better solution to be found.
// (This issue seems to exist in the base algorithm)
error /= 4;
}
// FIXME: The alpha values seem too low, which makes things look
// overly pointy. This fixes that, though there's probably a better
// solution to be found. (This issue seems to exist in the base algorithm)
error /= 4;
delta2_y += error;
delta_y += error;