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cristy | ffb69ed | 2010-12-25 00:06:48 +0000 | [diff] [blame] | 7 | <title>ImageMagick: MagickCore, C API for ImageMagick: Colormap Methods</title> |
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| 57 | <p class="text-center"><a href="colormap.html#AcquireImageColormap">AcquireImageColormap</a> • <a href="colormap.html#CycleColormap">CycleColormap</a></p> |
cristy | 06f63f2 | 2012-10-31 00:50:07 +0000 | [diff] [blame] | 58 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 59 | <div class="magick-header"> |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 60 | <h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="AcquireImageColormap">AcquireImageColormap</a></h2> |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 61 | |
| 62 | <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> |
| 63 | |
| 64 | <p>The format of the AcquireImageColormap method is:</p> |
| 65 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 66 | <pre class="text"> |
| 67 | MagickBooleanType AcquireImageColormap(Image *image,const size_t colors, |
| 68 | ExceptionInfo *exception) |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 69 | </pre> |
| 70 | |
| 71 | <p>A description of each parameter follows:</p> |
| 72 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 73 | <dd> |
| 74 | </dd> |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 75 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 76 | <dd> </dd> |
| 77 | <dl class="dl-horizontal"> |
| 78 | <dt>image</dt> |
| 79 | <dd>the image. </dd> |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 80 | |
cristy | 44443b9 | 2015-05-05 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 | |
| 85 | <dd> </dd> |
| 86 | <dt>exception</dt> |
| 87 | <dd>return any errors or warnings in this structure. </dd> |
| 88 | |
| 89 | <dd> </dd> |
| 90 | </dl> |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 91 | <h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="CycleColormap">CycleColormap</a></h2> |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 92 | |
| 93 | <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> |
| 94 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 95 | <p>WARNING: this assumes an images colormap is in a well know and defined order. Currently Imagemagick has no way of setting that order.</p> |
| 96 | |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 97 | <p>The format of the CycleColormapImage method is:</p> |
| 98 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 99 | <pre class="text"> |
| 100 | MagickBooleanType CycleColormapImage(Image *image,const ssize_t displace, |
| 101 | ExceptionInfo *exception) |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 102 | </pre> |
| 103 | |
| 104 | <p>A description of each parameter follows:</p> |
| 105 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 106 | <dd> |
| 107 | </dd> |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 108 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 109 | <dd> </dd> |
| 110 | <dl class="dl-horizontal"> |
| 111 | <dt>image</dt> |
| 112 | <dd>the image. </dd> |
cristy | 2039843 | 2011-08-11 01:31:50 +0000 | [diff] [blame] | 113 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 114 | <dd> </dd> |
| 115 | <dt>displace</dt> |
| 116 | <dd> displace the colormap this amount. </dd> |
cristy | 06f63f2 | 2012-10-31 00:50:07 +0000 | [diff] [blame] | 117 | |
cristy | 44443b9 | 2015-05-05 00:06:07 +0000 | [diff] [blame] | 118 | <dd> </dd> |
| 119 | <dt>exception</dt> |
| 120 | <dd>return any errors or warnings in this structure. </dd> |
| 121 | |
| 122 | <dd> </dd> |
| 123 | </dl> |
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