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LibWeb: Paint backdrop-filter effects!

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This implements all the filters other than `saturate()`,
`hue-rotate()`, and `drop-shadow()`.

There are still a lot of FIXMEs to handle in the actual implementation
though, particularly around supporting transforms, but this handles
the most common use cases :^)
This commit is contained in:
MacDue 2022-09-15 08:31:32 +01:00 • committed by Sam Atkins
parent 60356c8dde
commit 011439d3e3
5 changed files with 159 additions and 0 deletions
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9
Userland/Libraries/LibWeb/Painting/PaintableBox.cpp
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@ -11,6 +11,7 @@
#include <LibWeb/Layout/BlockContainer.h>
#include <LibWeb/Layout/InitialContainingBlock.h>
#include <LibWeb/Painting/BackgroundPainting.h>
#include <LibWeb/Painting/FilterPainting.h>
#include <LibWeb/Painting/PaintableBox.h>
#include <LibWeb/Painting/ShadowPainting.h>
#include <LibWeb/Painting/StackingContext.h>
@ -122,6 +123,7 @@ void PaintableBox::paint(PaintContext& context, PaintPhase phase) const
auto border_box = absolute_border_box_rect();
context.painter().add_clip_rect(clip_rect.to_rect().resolved(Paintable::layout_node(), border_box).to_rounded<int>());
}
paint_backdrop_filter(context);
paint_background(context);
paint_box_shadow(context);
}
@ -193,6 +195,13 @@ void PaintableBox::paint_border(PaintContext& context) const
paint_all_borders(context, absolute_border_box_rect(), normalized_border_radii_data(), borders_data);
}
void PaintableBox::paint_backdrop_filter(PaintContext& context) const
{
auto& backdrop_filter = computed_values().backdrop_filter();
if (!backdrop_filter.is_none())
Painting::apply_backdrop_filter(context, layout_node(), absolute_border_box_rect(), normalized_border_radii_data(), backdrop_filter);
}
void PaintableBox::paint_background(PaintContext& context) const
{
// If the body's background properties were propagated to the root element, do no re-paint the body's background.