Is shrink-on-load available?

[shotnothing]

E.g. In c:

tjDecompress2(
    decompressor, jpegBuf, jpegSize, imgBuf, width, 0, height, TJPF_RGB, 
    TJFLAG_FASTDCT | scaling factor // here, efficient shrinking by multiples of 2
);

[honzasp]

No, but feel free to open a PR that adds this feature :) Note that this crate uses TurboJPEG version 3, which has a different API for scaling during decompression (tj3SetScalingFactor()).