Questions and postings pertaining to the development of ImageMagick, feature enhancements, and ImageMagick internals. ImageMagick source code and algorithms are discussed here. Usage questions which are too arcane for the normal user list should also be posted here.
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Recently I tried to use -roll using % values and they did not work. It seems that -roll only shifts by pixels. Would it be possible to enhance this so that -roll recognized +X%+Y% in addition to the pixel shifts using +X+Y?. This is not urgent, since I can do a separate computation to convert percent to pixels. But it seems that -roll also should follow the geometry standards that in general allow % for example for resizing and cropping.