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LibGfx:: Implement scale support for blit_with_opacity()

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Now we no longer crash on mousewheel over Terminal while holding the
super key. The terminal window doesn't yet correctly become transparent
in hidpi mode (needs more investigation), but it works in LibGfxScaleDemo,
so maybe that's a problem elsewhere.

Also add a FIXME for a pre-existing bug.
This commit is contained in:
Nico Weber 2021-01-24 21:41:38 -05:00 • committed by Andreas Kling
parent 258a3b27ac
commit 76f2918416
2 changed files with 22 additions and 7 deletions
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6
Userland/Demos/LibGfxScaleDemo/main.cpp
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@ -98,6 +98,7 @@ void Canvas::draw(Gfx::Painter& painter)
painter.draw_rect({ 20, 34, WIDTH - 40, HEIGHT - 45 }, palette().color(Gfx::ColorRole::Selection), true);
painter.draw_rect({ 24, 38, WIDTH - 48, HEIGHT - 53 }, palette().color(Gfx::ColorRole::Selection));
// buggie.png has an alpha channel.
auto buggie = Gfx::Bitmap::load_from_file("/res/graphics/buggie.png");
painter.blit({ 25, 39 }, *buggie, { 2, 30, 62, 20 });
painter.draw_scaled_bitmap({ 88, 39, 62 * 2, 20 * 2 }, *buggie, Gfx::IntRect { 2, 30, 62, 20 });
@ -106,6 +107,11 @@ void Canvas::draw(Gfx::Painter& painter)
painter.draw_tiled_bitmap({ 25, 60, WIDTH - 50, 40 }, *buggie);
painter.blit({ 25, 101 }, *buggie, { 2, 30, 3 * buggie->width(), 20 });
// banner does not have an alpha channel.
auto banner = Gfx::Bitmap::load_from_file("/res/graphics/brand-banner.png");
painter.fill_rect({ 25, 122, 28, 20 }, Color::Green);
painter.blit({ 25, 122 }, *banner, { 314, 12, 28, 20 }, 0.8);
}
int main(int argc, char** argv)