* avm2: Implement `BitmapData.draw` for `wgpu` backend
This method requires us to have the ability to render directly to a
texture. Fortunately, the `wgpu` backend already supports this in
the form of `TextureTarget`. However, the rendering code required
some refactoring in order to avoid creating duplicate `wgpu` resources.
The current implementation blocks on copying the pixels back
from the GPU to the CPU, so that we can immediately set them in
the Ruffle `BitmapData`. This is likely very inefficient, but will
work for a first implementation.
In the future, we could explore allowing the CPU image data and GPU
texture to be out of sync, and only synchronized when explicitly
necessary (e.g. on `getPixel` or `setPixel` calls).
* Rename `with_offscreen_backend` to `render_offscreen` and use Bitmap
* Don't panic when backend doesn't implement `render_offscreen`
We already have `&mut self` available whenever we write to it,
and we never made use of the `Clone` impl. As far as I can tell,
we don't have any unimplemented features that would require a `GcCell`.
The stub implementation was breaking code that relied on being
able to set a value for 'mask' and then retrieve it
(which used to work on a dynamic class like `MovieClip`).
Change `set_matrix` and `set_color_transform` to accept owned structs,
instead of references. This allows callers that already have an owned
struct to pass it directly, thus saving an unnecessary borrow + clone.
This also aligns with other methods, such as `set_sound_transform`,
which currently accepts an owned struct.
The existing `Object` enum representation is problematic for inherited
native objects, since "regular" `ScriptObject`s cannot be turned into
native objects, but rather a completely new native object needs to be
created. `TObject::create_bare_object` is an attempt to aid this
situation, but it works only for `ActionExtends` inheritance, and not
when the user manually wires up `prototype`/`__proto__` (#701).
In Flash, it seems like derived constructors initially have a "regular"
`this` object. But once the `super()` constructor is invoked, the same
`this` object becomes a native object.
To allow this in Ruffle, introduce a new `NativeObject` enum, and
store it as a member in `ScriptObject`. For a start, move `TextFormatObject`
from the `Object` enum to `NativeObject`. The plan is to gradually
move all `Object` enum variants to `NativeObject`, except for `ScriptObject`.