C++ Skia bindings

[pragmatrix]

Hi, @Brooooooklyn and I are trying to do the same as we speak, but we are trying to interface the Skia C++ API instead of the C API. Bindgen has limited support for that, but we are progressing steadily. Two days ago, I managed to render some Skia graphics on a Vulkan Image in Rust using Voodoo with anti-aliasing in realtime... just a triangle and a rough PoC, but hey, it works 🎉.

Here is a shameless introduction to our project:

The binding generator: https://github.com/Brooooooklyn/rust-skia
Vulkan binding experiments: pragmatrix/rust-skia#3
Skia-Safe, the presumably future safe wrappers for Rust: https://github.com/pragmatrix/skia-safe
My thoughts about the binding development: https://github.com/pragmatrix/skia-safe/issues/1
And in general: rust-skia/rust-skia#6

I must admit that our attempt involves more risk and is in a bit of a chaotic state at the moment, but it may make sense to join efforts, and if not, I just wanted you to know that I am going to steal all ideas from you, because I am an absolute Rust newbee. And if I hit a road block, probably adding the Vulkan specific C functions and joining your project is another option for me to proceed (I've read somewhere that Xamarin team is considering that too, but they don't have a high priority assigned for that).

And great work on the OpenGL GPU bindings, I am quite impressed with your progress!

[M-Adoo]

Glad to see a c++ api binding for skia. I had a little worried about use C++ api may more complex and risk. All I need is a Rust idiomatic safe bindings.
Anyway, I'll watch your project, and happy to see your progress. Let continue to observe C api binding and C++ binding, maybe we can do same work together in the end.