forked from firka/flutter
2fcdf5a731
Migrate Paint API to `UniqueRef`. This includes `Paint`, `ImageFilter` (and all subtypes), `ColorFilter` (and all subtypes). Also fix the following memory leaks: * `CkPaint` is frequently used by layers where a one-off paint object is created, used, and immediately dropped. `CkPaint` now has a `dispose` method, and all one-off usages now dispose of the paint after they are done. * `CkColorFilter.initRawImageFilter` was leaking the `SkColorFilter` created by `_initRawColorFilter` inside the expression. * `CkManagedSkImageFilterConvertible.imageFilter` now takes a closure, which allows the implementation decide on the lifetime of the `SkImageFilter` vended to the caller. Because `CkColorFilter` is a const class it cannot store C++ instances inside its own fields, so it creates a temporary `SkImageFilter` class to be used by the caller and then it needs to delete it. Now it does.