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Ell authored
Add gimp_drawable_filter_set_crop(), which allows setting an output crop rectangle for the filter; anything outside the rectangle doesn't get filtered. The crop area is combined with the preview area to determine the filtered area during preview, however, unlike the preview area, the crop area remains in effect while committing the filter. Consequently, when merging a drawable filter, if the filter has a crop, only process the cropped area. (cherry picked from commit 5c27d14f)
05f74b6f