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LibWeb: Account text and image storage as external memory

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Report DOM character data, decoded image frames, ImageBitmap pixel
buffers, and 2D canvas surfaces through the GC external memory hook.
This lets image and text-heavy pages participate in GC threshold
calculations through their retained backing storage.
This commit is contained in:
Andreas Kling
2026-05-06 00:34:52 +02:00
committed by Andreas Kling
parent 68fa684f76
commit a414136d7c
Notes: github-actions[bot] 2026-05-07 08:04:42 +00:00 
Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/a414136d7ce
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/9286
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9
Libraries/LibWeb/HTML/ImageBitmap.cpp
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@@ -5,6 +5,7 @@
*/
#include <LibGfx/Bitmap.h>
#include <LibJS/Runtime/ExternalMemory.h>
#include <LibWeb/Bindings/ImageBitmap.h>
#include <LibWeb/HTML/ImageBitmap.h>
#include <LibWeb/HTML/StructuredSerialize.h>
@@ -72,6 +73,14 @@ void ImageBitmap::visit_edges(Cell::Visitor& visitor)
Base::visit_edges(visitor);
}
size_t ImageBitmap::external_memory_size() const
{
auto size = Base::external_memory_size();
if (m_bitmap)
size = JS::saturating_add_external_memory_size(size, m_bitmap->data_size());
return size;
}
// https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#the-imagebitmap-interface:serialization-steps
WebIDL::ExceptionOr<void> ImageBitmap::serialization_steps(HTML::TransferDataEncoder& serialized, bool, HTML::SerializationMemory&)
{