_paste_back gave up when there was no crop box and returned the sampler's frame
whole. Nothing outside the mask *changed*, but the entire frame had been through
the VAE's encode/decode, so every pixel the edit never touched came back softer.
For a pointwise edit, or anything sharpness-adjacent, that is the opposite of
what the mask was for.
With no crop and a mask, the full frame is now composited into the ORIGINAL
frames through that mask, the way the crop path already did: outside the mask
the output is the source verbatim, never a round trip of it. The mask's own blur
supplies the soft edge -- there is no box border to feather here.
This makes crop_mode a resolution decision again. Before it, preserving the
untouched pixels required turning the crop on even when the region already had
all the resolution it needed.
52 tests; the new ones pin that outside is the source byte for byte, inside is
the result, no mask still composites nothing, and a result of another size is
brought back to the frame first.
alisson-anjos
c79629dc80