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LibWeb: Add OffscreenCanvas to IDL types

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Add OffscreenCanvas to TexImageSource and CanvasImageSource.
Implement all the necessary features to make it work in all cases where
these types are used.
This commit is contained in:
Totto16 2025-03-06 23:41:31 +01:00 • committed by Andrew Kaster
parent 2ad3ce5d37
commit f1a096d6e4
Notes: github-actions[bot] 2025-06-30 15:47:37 +00:00
8 changed files with 35 additions and 9 deletions
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13
Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
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@ -135,6 +135,7 @@ WebIDL::ExceptionOr<void> CanvasRenderingContext2D::draw_image_internal(CanvasIm
[](GC::Root<SVG::SVGImageElement> const& source) -> RefPtr<Gfx::ImmutableBitmap> {
return source->current_image_bitmap();
},
[](GC::Root<OffscreenCanvas> const& source) -> RefPtr<Gfx::ImmutableBitmap> { return Gfx::ImmutableBitmap::create(*source->bitmap()); },
[](GC::Root<HTMLCanvasElement> const& source) -> RefPtr<Gfx::ImmutableBitmap> {
auto surface = source->surface();
if (!surface)
@ -737,8 +738,14 @@ WebIDL::ExceptionOr<CanvasImageSourceUsability> check_usability_of_image(CanvasI
return Optional<CanvasImageSourceUsability> {};
},
// OffscreenCanvas
[](GC::Root<OffscreenCanvas> const& offscreen_canvas) -> WebIDL::ExceptionOr<Optional<CanvasImageSourceUsability>> {
// If image has either a horizontal dimension or a vertical dimension equal to zero, then throw an "InvalidStateError" DOMException.
if (offscreen_canvas->width() == 0 || offscreen_canvas->height() == 0)
return WebIDL::InvalidStateError::create(offscreen_canvas->realm(), "OffscreenCanvas width or height is zero"_string);
return Optional<CanvasImageSourceUsability> {};
},
// HTMLCanvasElement
// FIXME: OffscreenCanvas
[](GC::Root<HTMLCanvasElement> const& canvas_element) -> WebIDL::ExceptionOr<Optional<CanvasImageSourceUsability>> {
// If image has either a horizontal dimension or a vertical dimension equal to zero, then throw an "InvalidStateError" DOMException.
if (canvas_element->width() == 0 || canvas_element->height() == 0)
@ -778,8 +785,8 @@ bool image_is_not_origin_clean(CanvasImageSource const& image)
// FIXME: image's media data is CORS-cross-origin.
return false;
},
// HTMLCanvasElement
[](OneOf<GC::Root<HTMLCanvasElement>, GC::Root<ImageBitmap>> auto const&) {
// HTMLCanvasElement, ImageBitmap or OffscreenCanvas
[](OneOf<GC::Root<HTMLCanvasElement>, GC::Root<ImageBitmap>, GC::Root<OffscreenCanvas>> auto const&) {
// FIXME: image's bitmap's origin-clean flag is false.
return false;
});