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LibWeb: Remove "cached corner bitmap" and its use in the corner clipper

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With the recording painter the actual painting operations are delayed,
so now if multiple corner clippers are constructed, and they use a
shared bitmap they can interfere with each other. The use of this shared
bitmap was somewhat questionable anyway, so this is not much of a loss.

This fixes the border-radius.html test page.
This commit is contained in:
MacDue 2023-10-21 19:17:49 +01:00 • committed by Alexander Kalenik
parent 1a58fee0fd
commit 1c012f0a4a
5 changed files with 8 additions and 50 deletions
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25
Userland/Libraries/LibWeb/Painting/BorderPainting.cpp
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@ -545,31 +545,6 @@ void paint_border(PaintContext& context, BorderEdge edge, DevicePixelRect const&
}
}
RefPtr<Gfx::Bitmap> get_cached_corner_bitmap(DevicePixelSize corners_size)
{
auto allocate_mask_bitmap = [&]() -> RefPtr<Gfx::Bitmap> {
auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, corners_size.to_type<int>());
if (!bitmap.is_error())
return bitmap.release_value();
return nullptr;
};
// FIXME: Allocate per page?
static thread_local auto corner_bitmap = allocate_mask_bitmap();
// Only reallocate the corner bitmap is the existing one is too small.
// (should mean no more allocations after the first paint -- amortised zero allocations :^))
if (corner_bitmap && corner_bitmap->rect().size().contains(corners_size.to_type<int>())) {
Gfx::Painter painter { *corner_bitmap };
painter.clear_rect({ { 0, 0 }, corners_size }, Gfx::Color());
} else {
corner_bitmap = allocate_mask_bitmap();
if (!corner_bitmap) {
dbgln("Failed to allocate corner bitmap with size {}", corners_size);
return nullptr;
}
}
return corner_bitmap;
}
void paint_all_borders(PaintContext& context, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii_data, BordersData const& borders_data)
{
if (borders_data.top.width <= 0 && borders_data.right.width <= 0 && borders_data.left.width <= 0 && borders_data.bottom.width <= 0)