1 2 3 4 5 <!DOCTYPE html> 6 <html lang="en"> 7 <head> 8 <title>ImageMagick: MagickCore, C API for ImageMagick: Colormap Methods</title> 9 <meta charset="utf-8" /> 10 <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 11 <meta name="viewport" content="width=device-width, initial-scale=1" /> 12 <meta http-equiv="content-type" content="text/html; charset=utf-8"/> 13 <meta name="application-name" content="ImageMagick"/> 14 <meta name="description" content="ImageMagick is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, WebP, Postscript, PDF, and SVG. 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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 67 <pre class="text"> 68 MagickBooleanType AcquireImageColormap(Image *image,const size_t colors, 69 ExceptionInfo *exception) 70 </pre> 71 72 <p>A description of each parameter follows:</p> 73 74 <dd> 75 </dd> 76 77 <dd> </dd> 78 <dl class="dl-horizontal"> 79 <dt>image</dt> 80 <dd>the image. </dd> 81 82 <dd> </dd> 83 <dt>colors</dt> 84 <dd>the number of colors in the image colormap. </dd> 85 86 <dd> </dd> 87 <dt>exception</dt> 88 <dd>return any errors or warnings in this structure. </dd> 89 90 <dd> </dd> 91 </dl> 92 <h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="CycleColormap">CycleColormap</a></h2> 93 94 <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> 95 96 <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> 97 98 <p>The format of the CycleColormapImage method is:</p> 99 100 <pre class="text"> 101 MagickBooleanType CycleColormapImage(Image *image,const ssize_t displace, 102 ExceptionInfo *exception) 103 </pre> 104 105 <p>A description of each parameter follows:</p> 106 107 <dd> 108 </dd> 109 110 <dd> </dd> 111 <dl class="dl-horizontal"> 112 <dt>image</dt> 113 <dd>the image. </dd> 114 115 <dd> </dd> 116 <dt>displace</dt> 117 <dd> displace the colormap this amount. </dd> 118 119 <dd> </dd> 120 <dt>exception</dt> 121 <dd>return any errors or warnings in this structure. </dd> 122 123 <dd> </dd> 124 </dl> 125 </div> 126 <footer class="magick-footer"> 127 <p><a href="../support.html">Donate</a> 128 <a href="../sitemap.html">Sitemap</a> 129 <a href="../links.html">Related</a> 130 <a href="../architecture.html">Architecture</a> 131 </p> 132 <p><a href="colormap.html#">Back to top</a> 133 <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> 134 <a href="http://www.imagemagick.org/script/contact.php">Contact Us</a></p> 135 <p><small> 1999-2016 ImageMagick Studio LLC</small></p> 136 </footer> 137 </div><!-- /.container --> 138 139 <script src="https://localhost/ajax/libs/jquery/1.11.3/jquery.min.js"></script> 140 <script src="../js/magick.html"></script> 141 </div> 142 </body> 143 </html> 144
