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LibWeb: Add <canvas> element and start fleshing out CRC2D

This patch adds HTMLCanvasElement along with a LayoutCanvas object.
The DOM and layout parts are very similar to <img> elements.

The <canvas> element holds a Gfx::Bitmap which is sized according to
the "width" and "height" attributes on the element.

Calling .getContext("2d") on a <canvas> element gives you a context
object that draws into the underlying Gfx::Bitmap of the <canvas>.
The context weakly points to the <canvas> which allows it to outlive
the canvas element if needed.

This is really quite cool. :^)
This commit is contained in:
Andreas Kling 2020-03-19 19:07:56 +01:00
parent 73d28a0551
commit a37c29e353
19 changed files with 649 additions and 1 deletions

View file

@ -46,7 +46,7 @@ private:
};
template<class NativeObject>
inline Wrapper* wrap(JS::Heap& heap, NativeObject& native_object)
inline Wrapper* wrap_impl(JS::Heap& heap, NativeObject& native_object)
{
if (!native_object.wrapper())
native_object.set_wrapper(*heap.allocate<typename NativeObject::WrapperType>(native_object));