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LibWeb: Implement createImageBitmap() with an ImageBitmap source

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ayeteadoe 2025-10-25 18:29:56 -07:00 • committed by Jelle Raaijmakers
parent d733bf54cc
commit 5abb5d555a
Notes: github-actions[bot] 2025-10-26 08:02:36 +00:00
3 changed files with 29 additions and 15 deletions
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24
Libraries/LibWeb/HTML/WindowOrWorkerGlobalScope.cpp
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@ -416,11 +416,25 @@ GC::Ref<WebIDL::Promise> WindowOrWorkerGlobalScopeMixin::create_image_bitmap_imp
}));
},
// -> ImageBitmap
[&](GC::Root<ImageBitmap> const&) {
dbgln("(STUBBED) createImageBitmap() for ImageBitmap");
auto const error = JS::Error::create(realm, "Not Implemented: createImageBitmap() for ImageBitmap"sv);
TemporaryExecutionContext const context { relevant_realm(p->promise()), TemporaryExecutionContext::CallbacksEnabled::Yes };
WebIDL::reject_promise(realm, *p, error);
[&](GC::Root<ImageBitmap> const& source_image_bitmap) {
// 1. Set imageBitmap's bitmap data to a copy of image's bitmap data, cropped to the source rectangle with formatting.
auto cropped_bitmap_or_error = crop_to_the_source_rectangle_with_formatting(source_image_bitmap->bitmap(), sx, sy, sw, sh, options);
// AD-HOC: Reject promise with an "InvalidStateError" DOMException on allocation failure
// Spec issue: https://github.com/whatwg/html/issues/3323
if (cropped_bitmap_or_error.is_error()) {
WebIDL::reject_promise(realm, *p, WebIDL::InvalidStateError::create(image_bitmap->realm(), "Image size is invalid"_utf16));
return;
}
image_bitmap->set_bitmap(cropped_bitmap_or_error.release_value());
// FIXME: 2. Set the origin-clean flag of imageBitmap's bitmap to the same value as the origin-clean flag of image's bitmap.
// 3. Queue a global task, using the bitmap task source, to resolve promise with imageBitmap.
queue_global_task(Task::Source::BitmapTask, image_bitmap, GC::create_function(realm.heap(), [p, image_bitmap] {
auto& realm = relevant_realm(image_bitmap);
TemporaryExecutionContext const context { realm, TemporaryExecutionContext::CallbacksEnabled::Yes };
WebIDL::resolve_promise(realm, *p, image_bitmap);
}));
},
[&](GC::Root<OffscreenCanvas> const&) {
dbgln("(STUBBED) createImageBitmap() for OffscreenCanvas");