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jaycox authored
* app/apptypes.h: added InterpolationType enum. * app/gimprc.[ch], app/preferences_dialog.c: replaced cubic_interpolation flag with interpolation_type variable. * app/pixel_region.[ch]: added pixel_region_has_alpha function. * app/paint_funcs.c: rewrote scale_region. It now behaves correctly on images with alpha, no longer leaves an artifact on the right edge of images when scailing up, and runs signifigantly faster.
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