Port lighting filters, feTile; fix filter transformations and kernelUnitLength handling; fix feTurbulence performance; remove filter FFI code
- Ported lighting filters and
feTile, thus getting rid of the last filters in C!
🎉 🎉 🎉
- Removed a ton of filter FFI boilerplate, including resolving #195 (closed).
- Also removed
RsvgCNodeImpland related stuff since it's no longer used by anything.
- Fixed some incorrect filter transformations.
feTurbulenceperformance (I was sure Rust is smart enough to change by-value
Copyarguments to by-reference where appropriate, but that's not the case).