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LibDraw: Add support for colors with alpha in Painter::fill_rect()

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This code is naive, but it works and looks okay. :^)
This commit is contained in:
Andreas Kling 2019-11-16 19:26:17 +01:00
parent 69dee20761
commit 89c0b158da
Notes: sideshowbarker 2024-07-19 11:11:13 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/89c0b158dae
1 changed files with 13 additions and 1 deletions
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14
Libraries/LibDraw/Painter.cpp
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@ -56,6 +56,9 @@ void Painter::fill_rect_with_draw_op(const Rect& a_rect, Color color)
void Painter::fill_rect(const Rect& a_rect, Color color)
{
if (color.alpha() == 0)
return;
if (draw_op() != DrawOp::Copy) {
fill_rect_with_draw_op(a_rect, color);
return;
@ -70,8 +73,17 @@ void Painter::fill_rect(const Rect& a_rect, Color color)
RGBA32* dst = m_target->scanline(rect.top()) + rect.left();
const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
if (color.alpha() == 0xff) {
for (int i = rect.height() - 1; i >= 0; --i) {
fast_u32_fill(dst, color.value(), rect.width());
dst += dst_skip;
}
return;
}
for (int i = rect.height() - 1; i >= 0; --i) {
fast_u32_fill(dst, color.value(), rect.width());
for (int j = 0; j < rect.width(); ++j)
dst[j] = Color::from_rgba(dst[j]).blend(color).value();
dst += dst_skip;
}
}