Implement upscale / downscale when decoded size doesn't match specified size

UprootLabs / poly-flif

:camera: A poly-fill for the FLIF image format.

https://uprootlabs.github.io/poly-flif/

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Closed hrj closed 7 years ago

hrj commented 7 years ago

Carrying over the discussion from #28, it would be convenient if the decoded image is fitted into the specified size.

There's an interesting choice though:

to decode to one size lower (which is the current behavior) and upscale (better speed), or
to decode to one size bigger and downscale (better quality)