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cristy20398432011-08-11 01:31:50 +0000239<h1>Module colormap Methods</h1>
cristy751980d2012-06-03 23:18:35 +0000240<p class="navigation-index">[<a href="colormap.html#AcquireImageColormap">AcquireImageColormap</a> &bull; <a href="colormap.html#CycleColormap">CycleColormap</a>]</p>
cristyf1196bb2010-02-13 21:18:03 +0000241
cristy20398432011-08-11 01:31:50 +0000242<h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="AcquireImageColormap">AcquireImageColormap</a></h2>
243<div class="doc-section">
244
245<p>AcquireImageColormap() allocates an image colormap and initializes it to a linear gray colorspace. If the image already has a colormap, it is replaced. AcquireImageColormap() returns MagickTrue if successful, otherwise MagickFalse if there is not enough memory.</p>
246
247<p>The format of the AcquireImageColormap method is:</p>
248
249<pre class="code">
250 MagickBooleanType AcquireImageColormap(Image *image,
251 const size_t colors)
252</pre>
253
254<p>A description of each parameter follows:</p>
255
256<h5>image</h5>
257<p>the image.</p>
258
259<h5>colors</h5>
260<p>the number of colors in the image colormap.</p>
261
262 </div>
263<h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="CycleColormap">CycleColormap</a></h2>
264<div class="doc-section">
265
266<p>CycleColormap() displaces an image's colormap by a given number of positions. If you cycle the colormap a number of times you can produce a psychodelic effect.</p>
267
268<p>The format of the CycleColormapImage method is:</p>
269
270<pre class="code">
271 MagickBooleanType CycleColormapImage(Image *image,const ssize_t displace)
272</pre>
273
274<p>A description of each parameter follows:</p>
275
276<h5>image</h5>
277<p>the image.</p>
278
279<h5>displace</h5>
280<p>displace the colormap this amount.</p>
281
282 </div>
cristy06f63f22012-10-31 00:50:07 +0000283
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