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LibGUI: Dither pattern should be independent from clipping rectangle

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The dither pattern needs to be determined relative to the bitmap
itself, not the clipping rectangle.

Fixes #8780
This commit is contained in:
Tom 2021-07-15 10:59:49 -06:00 • committed by Andreas Kling
parent 30af999431
commit 1021aba226
1 changed files with 1 additions and 1 deletions
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2
Userland/Libraries/LibGfx/Painter.cpp
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@ -155,7 +155,7 @@ void Painter::fill_rect_with_dither_pattern(const IntRect& a_rect, Color color_a
for (int i = 0; i < rect.height(); ++i) {
for (int j = 0; j < rect.width(); ++j) {
bool checkboard_use_a = (i & 1) ^ (j & 1);
bool checkboard_use_a = ((rect.left() + i) & 1) ^ ((rect.top() + j) & 1);
if (checkboard_use_a && !color_a.alpha())
continue;
if (!checkboard_use_a && !color_b.alpha())