Encoder configuration struct
Basic struct used for both owned (alias
ImgVec) and borrowed (alias
ImgRef) image fragments.
Clear/change RGB components of fully-transparent RGBA pixels to make them cheaper to encode with AV1
If config.color_space is ColorSpace::YCbCr, then it takes 8-bit BT709 color space.
Make a new AVIF image from RGB pixels
Make a new AVIF image from RGBA pixels (non-premultiplied, alpha last)