granicus.if.org Git - imagemagick/blob - www/api/colormap.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   2 <html xmlns="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="-//W3C//DTD XHTML 1.1//EN" xml:lang="en" xsi:schemaLocation="http://www.w3.org/1999/xhtml                           http://www.w3.org/MarkUp/SCHEMA/xhtml11.xsd">
   3 <head>
   4   <meta http-equiv="content-type" content="text/html; charset=UTF-8"></meta>
   5   <meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4"></meta>
   6   <title>ImageMagick: MagickCore, C API for ImageMagick: Colormap Methods</title>
   7   <meta http-equiv="content-language" content="en-US"></meta>
   8   <meta http-equiv="content-type" content="text/html; charset=utf-8"></meta>
   9   <meta http-equiv="reply-to" content="magick-users@imagemagick.org"></meta>
  10   <meta name="application-name" content="ImageMagick"></meta>
  11   <meta name="description" content="Use ImageMagick to convert, edit, or compose bitmap images in a variety of formats.  In addition, resize, rotate, shear, distort or transform images automagically."></meta>
  12   <meta name="application-url" content="http://www.imagemagick.org"></meta>
  13   <meta name="generator" content="PHP"></meta>
  14   <meta name="keywords" content="magickcore, c, api, for, imagemagick:, colormap, methods, ImageMagick, PerlMagick, image processing, OpenMP, software development library, image, photo, software, Magick++, MagickWand"></meta>
  15   <meta name="rating" content="GENERAL"></meta>
  16   <meta name="robots" content="INDEX, FOLLOW"></meta>
  17   <meta name="generator" content="ImageMagick Studio LLC"></meta>
  18   <meta name="author" content="ImageMagick Studio LLC"></meta>
  19   <meta name="revisit-after" content="2 DAYS"></meta>
  20   <meta name="resource-type" content="document"></meta>
  21   <meta name="copyright" content="Copyright (c) 1999-2012 ImageMagick Studio LLC"></meta>
  22   <meta name="distribution" content="Global"></meta>
  23   <link rel="icon" href="../../images/wand.png"></link>
  24   <link rel="shortcut icon" href="../../images/wand.ico" type="images/x-icon"></link>
  25   <link rel="canonical" href="../../index.html"></link>
  26   <link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf"></link>
  27
  28   <!-- Add jQuery library -->
  29   <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
  30
  31   <!-- Add mousewheel plugin (this is optional) -->
  32   <script type="text/javascript" src="http://www.imagemagick.org/fancybox/lib/jquery.mousewheel-3.0.6.pack.js"></script>
  33
  34   <!-- Add fancyBox -->
  35   <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/source/jquery.fancybox.css?v=2.0.6" type="text/css" media="screen"></link>
  36   <script type="text/javascript" src="http://www.imagemagick.org/fancybox/source/jquery.fancybox.pack.js?v=2.0.6"></script>
  37
  38   <!-- Optionally add helpers - button, thumbnail and/or media -->
  39   <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/source/helpers/jquery.fancybox-buttons.css?v=1.0.2" type="text/css" media="screen"></link>
  40   <script type="text/javascript" src="http://www.imagemagick.org/fancybox/source/helpers/jquery.fancybox-buttons.js?v=1.0.2"></script>
  41   <script type="text/javascript" src="http://www.imagemagick.org/fancybox/source/helpers/jquery.fancybox-media.js?v=1.0.0"></script>
  42
  43   <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/source/helpers/jquery.fancybox-thumbs.css?v=2.0.6" type="text/css" media="screen"></link>
  44   <script type="text/javascript" src="http://www.imagemagick.org/fancybox/source/helpers/jquery.fancybox-thumbs.js?v=2.0.6"></script>
  45
  46   <script type="text/javascript">
  47         $(document).ready(function() {
  48                 $(".fancybox").fancybox();
  49         });
  50   </script>
  51
  52   <!-- ImageMagick style -->
  53   <style type="text/css" media="all">
  54     @import url("../../www/magick.css");
  55   </style>
  56 </head>
  57
  58 <body id="www-imagemagick-org">
  59
  60
  61
  62 <div class="titlebar">
  63 <div style="margin: 17px auto; float: left;">
  64   <script type="text/javascript">
  65   <!--
  66     google_ad_client = "pub-3129977114552745";
  67     google_ad_slot = "5439289906";
  68     google_ad_width = 728;
  69     google_ad_height = 90;
  70   //-->
  71   </script>
  72
  73 </div>
  74 <a href="../../discourse-server">
  75   <img src="../../images/logo.jpg" alt="ImageMagick Logo" style="width: 123px; height: 118px; border: 0px; float: right;"></img></a>
  76 <a href="../../index.html">
  77   <img src="../../images/sprite.jpg" alt="ImageMagick Sprite" style="width: 114px; height: 118px; border: 0px; float: right;"></img></a>
  78 </div>
  79
  80 <div class="westbar">
  81
  82 <div class="menu">
  83   <a title="About ImageMagick" href="../../index.html">About ImageMagick</a>
  84 </div>
  85 <div class="menu">
  86   <a title="Binary Releases" href="../../www/binary-releases.html">Binary Releases</a>
  87 </div>
  88 <div class="sub">
  89     <a title="Binary Release: Unix" href="../../www/binary-releases.html#unix">Unix</a>
  90 </div>
  91 <div class="sub">
  92     <a title="Binary Release: MacOS X" href="../../www/binary-releases.html#macosx">Mac OS X</a>
  93 </div>
  94 <div class="sub">
  95     <a title="Binary Release: iOS" href="../../www/binary-releases.html#iOS">iOS</a>
  96 </div>
  97 <div class="sub">
  98     <a title="Binary Release: Windows" href="../../www/binary-releases.html#windows">Windows</a>
  99 </div>
 100 <div class="sep"></div>
 101 <div class="menu">
 102   <a title="Command-line Tools" href="../../www/command-line-tools.html">Command-line Tools</a>
 103 </div>
 104 <div class="sub">
 105     <a title="Command-line Tools: Processing" href="../../www/command-line-processing.html">Processing</a>
 106 </div>
 107 <div class="sub">
 108     <a title="Command-line Tools: Options" href="../../www/command-line-options.html">Options</a>
 109 </div>
 110 <div class="sub">
 111     <a title="Command-line Tools: Usage" href="http://www.imagemagick.org/Usage/">Usage</a>
 112 </div>
 113 <div class="menu">
 114   <a title="Program Interfaces" href="../../www/api.html">Program Interfaces</a>
 115 </div>
 116 <div class="sub">
 117     <a title="Program Interface: MagickWand" href="../../www/magick-wand.html">MagickWand</a>
 118 </div>
 119 <div class="sub">
 120     <a title="Program Interface: MagickCore" href="../../www/magick-core.html">MagickCore</a>
 121 </div>
 122 <div class="sub">
 123     <a title="Program Interface: PerlMagick" href="../../www/perl-magick.html">PerlMagick</a>
 124 </div>
 125 <div class="sub">
 126     <a title="Program Interface: Magick++" href="../../www/magick++.html">Magick++</a>
 127 </div>
 128 <div class="sep"></div>
 129 <div class="menu">
 130    <a title="Install from Source" href="../../www/install-source.html">Install from Source</a>
 131 </div>
 132 <div class="sub">
 133     <a title="Install from Source: Unix" href="../../www/install-source.html#unix">Unix</a>
 134 </div>
 135 <div class="sub">
 136     <a title="Install from Source: Windows" href="../../www/install-source.html#windows">Windows</a>
 137  </div>
 138 <div class="menu">
 139   <a title="Resources" href="../../www/resources.html">Resources</a>
 140 </div>
 141 <div class="menu">
 142   <a title="Architecture" href="../../www/architecture.html">Architecture</a>
 143 </div>
 144 <div class="menu">
 145   <a title="Download" href="../../www/download.html">Download</a>
 146 </div>
 147 <div class="sep"></div>
 148 <div class="menu">
 149   <a title="Search" href="http://www.imagemagick.org/script/search.php">Search</a>
 150 </div>
 151 <div class="sep"></div>
 152 <div class="menu">
 153   <a title="Site Map" href="../../www/sitemap.html">Site Map</a>
 154 </div>
 155 <div class="sub">
 156   <a title="Site Map: Links" href="../../www/links.html">Links</a>
 157 </div>
 158 <div class="sep"></div>
 159 <div class="menu">
 160   <a title="Support ImageMagick Development" href="../../www/support.html">Support ImageMagick Development</a>
 161 </div>
 162 </div>
 163
 164 <div class="eastbar">
 165
 166   <div> <a class="FlattrButton" style="display:none;" rev="flattr;button:compact;" href="../../index.html"></a></div>
 167   <noscript>
 168     <a href="http://flattr.com/thing/947300/Convert-Edit-And-Compose-Images" target="_blank">
 169     <img src="http://api.flattr.com/button/flattr-badge-large.png" alt="Flattr this" title="Flattr this" width="93" height="20" border="0"></img></a>
 170   </noscript>
 171
 172
 173 </div>
 174
 175 <div class="main">
 176
 177 <h1>Module colormap Methods</h1>
 178 <p class="navigation-index">[<a href="colormap.html#AcquireImageColormap">AcquireImageColormap</a> • <a href="colormap.html#CycleColormap">CycleColormap</a>]</p>
 179
 180 <h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="AcquireImageColormap">AcquireImageColormap</a></h2>
 181 <div class="doc-section">
 182
 183 <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>
 184
 185 <p>The format of the AcquireImageColormap method is:</p>
 186
 187 <pre class="code">
 188   MagickBooleanType AcquireImageColormap(Image *image,
 189     const size_t colors)
 190 </pre>
 191
 192 <p>A description of each parameter follows:</p>
 193
 194 <h5>image</h5>
 195 <p>the image.</p>
 196
 197 <h5>colors</h5>
 198 <p>the number of colors in the image colormap.</p>
 199
 200  </div>
 201 <h2><a href="http://www.imagemagick.org/api/MagickCore/colormap_8c.html" id="CycleColormap">CycleColormap</a></h2>
 202 <div class="doc-section">
 203
 204 <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>
 205
 206 <p>The format of the CycleColormapImage method is:</p>
 207
 208 <pre class="code">
 209   MagickBooleanType CycleColormapImage(Image *image,const ssize_t displace)
 210 </pre>
 211
 212 <p>A description of each parameter follows:</p>
 213
 214 <h5>image</h5>
 215 <p>the image.</p>
 216
 217 <h5>displace</h5>
 218 <p>displace the colormap this amount.</p>
 219
 220  </div>
 221
 222 </div>
 223
 224 <div id="linkbar">
 225     <span id="linkbar-west"> </span>
 226
 227     <span id="linkbar-center">
 228       <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&amp;search=0x89AB63D48277377A">Public Key</a> •
 229       <a href="../../discourse-server">Discourse Server</a> •
 230       <a href="http://www.imagemagick.org/MagickStudio/scripts/MagickStudio.cgi">Studio</a> •
 231       <a href="http://jqmagick.imagemagick.org/">JqMagick</a>
 232     </span>
 233     <span id="linkbar-east"> </span>
 234 </div>
 235 <div class="footer">
 236   <span id="footer-west">©  1999-2014 ImageMagick Studio LLC</span>
 237   <span id="footer-east"> <a href="../../www/contact.html">Contact the Wizards</a></span>
 238 </div>
 239 <div style="clear: both; margin: 0; width: 100%; "></div>
 240 </body>
 241 </html>