(PECL gmagick >= Unknown)
Gmagick::cyclecolormapimage — Displaces an image's colormap
Displaces an image's colormap by a given number of positions. If you cycle the colormap a number of times you can produce a psychedelic effect.
displaceThe amount to displace the colormap.
Returns self on success.
Викидає GmagickException у разі помилки.