Draw a loaded image down to thumbnail size and encode it.
Returns null rather than throwing on anything it cannot do — no intrinsic size, a
canvas the engine refuses to read back — because a photo saved without a thumbnail is
recoverable and a shutter press that saves nothing is not.
Draw a loaded image down to thumbnail size and encode it.
Returns
nullrather than throwing on anything it cannot do — no intrinsic size, a canvas the engine refuses to read back — because a photo saved without a thumbnail is recoverable and a shutter press that saves nothing is not.