Function C_SkJpegEncoder_EncodeImage 

pub unsafe extern "C" fn C_SkJpegEncoder_EncodeImage(
    ctx: *mut GrDirectContext,
    img: *const SkImage,
    quality: c_int,
    downsample: SkJpegEncoder_Downsample,
    alphaOption: SkJpegEncoder_AlphaOption,
    xmpMetadata: *const SkData,
    origin: *const SkEncodedOrigin,
) -> *mut SkData