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cristyffb69ed2010-12-25 00:06:48 +0000[diff] [blame]7 <title>ImageMagick: MagickCore, C API for ImageMagick: Colormap Methods</title>
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cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]59<p class="text-center"><a href="colormap.html#AcquireImageColormap">AcquireImageColormap</a> • <a href="colormap.html#CycleColormap">CycleColormap</a></p>
cristy06f63f22012-10-31 00:50:07 +0000[diff] [blame]60
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]61<h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="AcquireImageColormap">AcquireImageColormap</a></h2>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]62
63<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>
64
65<p>The format of the AcquireImageColormap method is:</p>
66
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]67<pre class="text">
cristy82a2ff22015-05-12 16:41:32 +0000[diff] [blame]68MagickBooleanType AcquireImageColormap(Image *image,const size_t colors)
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]69</pre>
70
71<p>A description of each parameter follows:</p>
72
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]73<dd>
74</dd>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]75
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]76<dd> </dd>
77<dl class="dl-horizontal">
78<dt>image</dt>
79<dd>the image. </dd>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]80
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]81<dd> </dd>
82<dt>colors</dt>
83<dd>the number of colors in the image colormap. </dd>
84
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]85<dd> </dd>
86</dl>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]87<h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="CycleColormap">CycleColormap</a></h2>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]88
89<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>
90
91<p>The format of the CycleColormapImage method is:</p>
92
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]93<pre class="text">
cristy82a2ff22015-05-12 16:41:32 +0000[diff] [blame]94MagickBooleanType CycleColormapImage(Image *image,const ssize_t displace)
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]95</pre>
96
97<p>A description of each parameter follows:</p>
98
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]99<dd>
100</dd>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]101
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]102<dd> </dd>
103<dl class="dl-horizontal">
104<dt>image</dt>
105<dd>the image. </dd>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]106
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]107<dd> </dd>
108<dt>displace</dt>
109<dd> displace the colormap this amount. </dd>
cristy06f63f22012-10-31 00:50:07 +0000[diff] [blame]110
cristy44443b92015-05-05 00:06:07 +0000[diff] [blame]111<dd> </dd>
112</dl>
cristy06f63f22012-10-31 00:50:07 +0000[diff] [blame]113</div>
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