2dff457a7c
While testing some distortion options, I noticed that the Movie Distortion node
would crash when used with e.g. (0.0, 0.0, 0.5) as the lens parameters.
This appears to be caused by 00ee917fd. Turns out that even though the input was
512x384, the extended size ended up being around 600000x500000, which obviously
caused some issues.
Therefore, this patch a) clamps the margin to be at most as wide as the input
(so 9x the pixels in the worst case) and b) fixes the indexing calculations to
not overflow the int32 values in case the input is legitimately huge.
Pull Request: https://projects.blender.org/blender/blender/pulls/137440
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