Type Definition jpegxl_sys::JpegxlFrameBase

type JpegxlFrameBase = u32;

Indicates what the next frame will be "based" on. A full frame (have_crop = false) can be based on a frame if and only if the frame and the base are lossy. The rendered frame will then be the sum of the two. A cropped frame can be based on any kind of frame. The rendered frame will be obtained by blitting. Stored in FrameHeader and ExtraChannelInfo to allow independent control for main and extra channels.