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LibGUI+LibGfx: Paint scollbar tracks with a dithered pattern

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Instead of a solid color, we now paint the track/gutter of scrollbars
using a 2-color dither pattern for a pleasant millennium feel. :^)
This commit is contained in:
Andreas Kling 2020-05-10 01:00:21 +02:00
parent ac701cb589
commit 9e74793ce2
3 changed files with 22 additions and 1 deletions
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20
Libraries/LibGfx/Painter.cpp
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@ -136,6 +136,26 @@ void Painter::fill_rect(const Rect& a_rect, Color color)
}
}
void Painter::fill_rect_with_dither_pattern(const Rect& a_rect, Color color_a, Color color_b)
{
auto rect = a_rect.translated(translation()).intersected(clip_rect());
if (rect.is_empty())
return;
RGBA32* dst = m_target->scanline(rect.top()) + rect.left();
const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
for (int i = 0; i < rect.height(); ++i) {
for (int j = 0; j < rect.width(); ++j) {
if (i & 1)
dst[j] = (j & 1) ? color_a.value() : color_b.value();
else
dst[j] = (j & 1) ? color_b.value() : color_a.value();
}
dst += dst_skip;
}
}
void Painter::fill_rect_with_checkerboard(const Rect& a_rect, const Size& cell_size, Color color_dark, Color color_light)
{
auto rect = a_rect.translated(translation()).intersected(clip_rect());