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LibWeb: Add basic support for maskUnits=userSpaceOnUse

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This still does not use the x, y, width, or height attributes on the
mask, but this allows at least displaying these masks.
This commit is contained in:
MacDue 2023-10-07 20:23:52 +01:00 committed by Andreas Kling
parent 479451498b
commit 92fc426562
2 changed files with 15 additions and 7 deletions
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18
Userland/Libraries/LibWeb/Painting/SVGGraphicsPaintable.cpp
View file

@ -8,6 +8,7 @@
#include <LibWeb/Painting/SVGGraphicsPaintable.h>
#include <LibWeb/Painting/StackingContext.h>
#include <LibWeb/SVG/SVGMaskElement.h>
#include <LibWeb/SVG/SVGSVGElement.h>
namespace Web::Painting {
@ -35,9 +36,20 @@ Layout::SVGGraphicsBox const& SVGGraphicsPaintable::layout_box() const
Optional<CSSPixelRect> SVGGraphicsPaintable::get_masking_area() const
{
auto const& graphics_element = verify_cast<SVG::SVGGraphicsElement const>(*dom_node());
if (auto mask = graphics_element.mask())
return mask->resolve_masking_area(absolute_border_box_rect());
return {};
auto mask = graphics_element.mask();
if (!mask)
return {};
auto target_area = [&] {
auto mask_units = mask->mask_units();
if (mask_units == SVG::MaskUnits::UserSpaceOnUse) {
auto const* svg_element = graphics_element.shadow_including_first_ancestor_of_type<SVG::SVGSVGElement>();
return svg_element->paintable_box()->absolute_border_box_rect();
} else {
VERIFY(mask_units == SVG::MaskUnits::ObjectBoundingBox);
return absolute_border_box_rect();
}
}();
return mask->resolve_masking_area(target_area);
}
static Gfx::Bitmap::MaskKind mask_type_to_gfx_mask_kind(CSS::MaskType mask_type)

4
Userland/Libraries/LibWeb/SVG/SVGMaskElement.cpp
View file

@ -53,10 +53,6 @@ MaskUnits SVGMaskElement::mask_units() const
CSSPixelRect SVGMaskElement::resolve_masking_area(CSSPixelRect const& mask_target) const
{
if (mask_units() == SVG::MaskUnits::UserSpaceOnUse) {
dbgln("SVG: maskUnits=userSpaceOnUse is not supported");
return {};
}
// TODO: Resolve this based on the x, y, width, and height of the mask.
return mask_target.inflated(mask_target.size().scaled(CSSPixels(2) / 10));
}