Gitiles
Code Review Sign In
gerrit-public.fairphone.software / platform / external / ImageMagick / f4ad9df69835f9ed5c687a9f93e8a53e23a3258f / . / www / api / distort.html
blob: 6e237a88710477938f428d5ce0c65cd68900c753 [file] [log] [blame]
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
2 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
cristy2bd2a982011-02-15 00:52:58 +0000[diff] [blame]3<html version="-//W3C//DTD XHTML 1.1//EN"
4 xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
5 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6 xsi:schemaLocation="http://www.w3.org/1999/xhtml
7 http://www.w3.org/MarkUp/SCHEMA/xhtml11.xsd">
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]8<head>
cristy3c98a4f2010-08-13 20:09:41 +0000[diff] [blame]9 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
10 <meta name="verify-v1" content="g222frIIxcQTrvDR3NBRUSKP3AnMNoqxOkIniCEkV7U="/>
cristyffb69ed2010-12-25 00:06:48 +0000[diff] [blame]11 <title>ImageMagick: MagickCore, C API for ImageMagick: Image Distortions</title>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]12 <meta http-equiv="Content-Language" content="en-US"/>
13 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
14 <meta http-equiv="Reply-to" content="magick-users@imagemagick.org"/>
cristy3c98a4f2010-08-13 20:09:41 +0000[diff] [blame]15 <meta name="Application-name" content="ImageMagick"/>
cristye6e84152011-06-06 14:16:49 +0000[diff] [blame]16 <meta name="Description" content="Use ImageMagick to convert, edit, or compose bitmap images in a variety of formats. In addition resize, rotate, shear, distort and transform images automagically."/>
cristy3c98a4f2010-08-13 20:09:41 +0000[diff] [blame]17 <meta name="Application-url" content="http://www.imagemagick.org"/>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]18 <meta name="Generator" content="PHP"/>
cristye6e84152011-06-06 14:16:49 +0000[diff] [blame]19 <meta name="Keywords" content="magickcore, c, api, for, imagemagick:, image, distortions, ImageMagick, ImageMagic, MagickCore, MagickWand, PerlMagick, Magick++, RMagick, PythonMagick, JMagick, TclMagick, Image, Magick, Magic, Wand, ImageMagickObject, Image, Processing, Automagically"/>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]20 <meta name="Rating" content="GENERAL"/>
21 <meta name="Robots" content="INDEX, FOLLOW"/>
22 <meta name="Generator" content="ImageMagick Studio LLC"/>
23 <meta name="Author" content="ImageMagick Studio LLC"/>
24 <meta name="Revisit-after" content="2 DAYS"/>
25 <meta name="Resource-type" content="document"/>
cristy4103d562010-12-10 01:38:54 +0000[diff] [blame]26 <meta name="Copyright" content="Copyright (c) 1999-2011 ImageMagick Studio LLC"/>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]27 <meta name="Distribution" content="Global"/>
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]28 <link rel="icon" href="../../images/wand.png"/>
cristy3c98a4f2010-08-13 20:09:41 +0000[diff] [blame]29 <link rel="shortcut icon" href="../../images/wand.ico" type="images/x-icon"/>
cristy29c5c992011-06-25 13:58:49 +0000[diff] [blame]30 <link rel="canonical" href="http://www.imagemagick.org" />
cristy3c98a4f2010-08-13 20:09:41 +0000[diff] [blame]31 <link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf"/>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame]32 <link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
cristy29c5c992011-06-25 13:58:49 +0000[diff] [blame]33 <link rel="stylesheet" type="text/css" href="../fancybox/jquery.fancybox-1.3.4.css" media="screen" />
cristy3c98a4f2010-08-13 20:09:41 +0000[diff] [blame]34 <style type="text/css" media="all">
35 @import url("../../www/magick.css");
36 </style>
cristy29c5c992011-06-25 13:58:49 +0000[diff] [blame]37 <script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]38 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
cristy361f4662010-12-31 23:02:52 +0000[diff] [blame]39 <script type="text/javascript" src="../fancybox/jquery.fancybox-1.3.4.pack.js"></script>
cristy361f4662010-12-31 23:02:52 +0000[diff] [blame]40 <script type="text/javascript">
41 $(document).ready(function() {
42 $("a[href$=.jpg],a[href$=.png],a[href$=.gif]").fancybox({
43 'transitionIn' : 'elastic',
44 'transitionOut' : 'elastic',
45 'overlayShow' : false,
46 'opacity' : true
47 });
48 });
49 </script>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]50</head>
51
52<body id="www-imagemagick-org">
53<div class="titlebar">
cristyb52981c2011-03-19 17:09:31 +0000[diff] [blame]54<div style="margin: 17px auto; float: left;">
55 <script type="text/javascript">
56 <!--
57 google_ad_client = "pub-3129977114552745";
58 google_ad_slot = "5439289906";
59 google_ad_width = 728;
60 google_ad_height = 90;
61 //-->
62 </script>
63 <script type="text/javascript"
64 src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
65 </script>
66</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]67<a href="http://www.imagemagick.org/discourse-server/">
cristyaf8d6652011-02-04 21:57:45 +0000[diff] [blame]68 <img src="../../images/logo.jpg"
69 alt="ImageMagick Logo"
cristy178edaf2011-01-23 03:42:39 +0000[diff] [blame]70 style="width: 123px; height: 118px; border: 0px; float: right;" /></a>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]71<a href="../../index.html">
cristyaf8d6652011-02-04 21:57:45 +0000[diff] [blame]72 <img src="../../images/sprite.jpg"
73 alt="ImageMagick Sprite"
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]74 style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
75</div>
76
cristyce69bb02010-07-27 19:49:46 +0000[diff] [blame]77<div class="westbar">
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]78
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]79<div class="menu">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]80 <a title="About ImageMagick" href="../../index.html">About ImageMagick</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]81</div>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]82<div class="menu">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]83 <a title="Binary Releases" href="../../www/binary-releases.html">Binary Releases</a>
84</div>
85<div class="sub">
86 <a title="Binary Release: Unix" href="../../www/binary-releases.html#unix">Unix</a>
87</div>
88<div class="sub">
89 <a title="Binary Release: MacOS X" href="../../www/binary-releases.html#macosx">Mac OS X</a>
90</div>
91<div class="sub">
cristye6e84152011-06-06 14:16:49 +0000[diff] [blame]92 <a title="Binary Release: iOS" href="../../www/binary-releases.html#iOS">iOS</a>
cristyda16f162011-02-19 23:52:17 +0000[diff] [blame]93</div>
94<div class="sub">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]95 <a title="Binary Release: Windows" href="../../www/binary-releases.html#windows">Windows</a>
96</div>
97<div class="sep"></div>
98<div class="menu">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]99 <a title="Command-line Tools" href="../../www/command-line-tools.html">Command-line Tools</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]100</div>
101<div class="sub">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]102 <a title="Command-line Tools: Processing" href="../../www/command-line-processing.html">Processing</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]103</div>
104<div class="sub">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]105 <a title="Command-line Tools: Options" href="../../www/command-line-options.html">Options</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]106</div>
107<div class="sub">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]108 <a title="Command-line Tools: Usage" href="http://www.imagemagick.org/Usage/">Usage</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]109</div>
110<div class="menu">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]111 <a title="Program Interfaces" href="../../www/api.html">Program Interfaces</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]112</div>
113<div class="sub">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]114 <a title="Program Interface: MagickWand" href="../../www/magick-wand.html">MagickWand</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]115</div>
116<div class="sub">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]117 <a title="Program Interface: MagickCore" href="../../www/magick-core.html">MagickCore</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]118</div>
119<div class="sub">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]120 <a title="Program Interface: PerlMagick" href="../../www/perl-magick.html">PerlMagick</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]121</div>
122<div class="sub">
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]123 <a title="Program Interface: Magick++" href="../../www/magick++.html">Magick++</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]124</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]125<div class="sep"></div>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]126<div class="menu">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]127 <a title="Install from Source" href="../../www/install-source.html">Install from Source</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]128</div>
129<div class="sub">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]130 <a title="Install from Source: Unix" href="../../www/install-source.html#unix">Unix</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]131</div>
132<div class="sub">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]133 <a title="Install from Source: Windows" href="../../www/install-source.html#windows">Windows</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]134 </div>
135<div class="menu">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]136 <a title="Resources" href="../../www/resources.html">Resources</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]137</div>
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]138<div class="menu">
139 <a title="Architecture" href="../../www/architecture.html">Architecture</a>
140</div>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]141<div class="menu">
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]142 <a title="Download" href="../../www/download.html">Download</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]143</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]144<div class="sep"></div>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]145<div class="menu">
cristy52923442011-01-15 22:54:31 +0000[diff] [blame]146 <a title="Search" href="../../www/search.html">Search</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]147</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]148<div class="sep"></div>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]149<div class="menu">
cristyffb69ed2010-12-25 00:06:48 +0000[diff] [blame]150 <a title="Site Map" href="../../www/sitemap.html">Site Map</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]151</div>
152<div class="sub">
cristyffb69ed2010-12-25 00:06:48 +0000[diff] [blame]153 <a title="Site Map: Links" href="../../www/links.html">Links</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]154</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]155<div class="sep"></div>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]156<div class="menu">
cristy10549a12011-05-15 19:04:46 +0000[diff] [blame]157 <a rel="follow" title="Sponsors" href="../../www/sponsors.html">Sponsors:</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]158
cristyb52981c2011-03-19 17:09:31 +0000[diff] [blame]159<a href="http://www.networkredux.com">
160 <img src="../../images/networkredux.png" alt="[sponsor]"
161 style="margin-top: 4px; margin-left: 4px; border: 0px; float: left;" /></a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]162<div class="sponsbox">
cristy178edaf2011-01-23 03:42:39 +0000[diff] [blame]163<div class="sponsor">
cristy81492d62011-06-07 16:41:42 +0000[diff] [blame]164 <a rel="follow" title="Sponsor: Web Hosting" href="http://www.micfo.com">Web Hosting</a><!-- 209901010090s golestan -->
165</div>
166<div class="sponsor">
cristy84134182011-06-15 22:59:00 +0000[diff] [blame]167 <a rel="follow" title="Sponsor: Search engine optimisation" href="http://www.seomoves.com.au">Search engine optimisation</a><!-- 201110010090s jen@seo lowprofilelinks -->
168</div>
169<div class="sponsor">
cristy81492d62011-06-07 16:41:42 +0000[diff] [blame]170 <a rel="follow" title="Sponsor: Druckerei" href="http://print24.com/de/">Druckerei</a><!-- 201110010720 -->
171</div>
172<div class="sponsor">
cristyba1758d2011-06-03 01:29:12 +0000[diff] [blame]173 <a rel="follow" title="Sponsor: Web Hosting Deals" href="http://www.webhostingdeals.org">Web Hosting Deals</a><!-- 201111010270 chee.hoa darin -->
174</div>
175<div class="sponsor">
176 <a rel="follow" title="Sponsor: Web Hosting Reviews" href="http://www.webhostingsecretrevealed.com">Web Hosting Secret Revealed</a><!-- 201204010540 iamchee jerry -->
177</div>
178<div class="sponsor">
cristy4bf6e232011-05-21 01:43:33 +0000[diff] [blame]179 <a rel="follow" title="Sponsor: Web Hosting Break" href="http://www.webhostingbreak.com">Web Hosting Break</a><!-- 201109010090 ian@ian-m... -->
cristy45dbd322011-03-27 16:40:38 +0000[diff] [blame]180</div>
181<div class="sponsor">
cristy10549a12011-05-15 19:04:46 +0000[diff] [blame]182 <a rel="follow" title="Sponsor: Druckerei" href="http://www.allesdruck.de">Druckerei</a><!-- 201303011500 r.leo -->
cristy4c54bbb2011-03-17 13:53:13 +0000[diff] [blame]183</div>
184<div class="sponsor">
cristy575d5ee2011-05-24 01:59:01 +0000[diff] [blame]185 <a rel="follow" title="Sponsor: Website Hosting" href="http://www.hostreviewgeeks.com">Website Hosting</a><!-- 201110010090 alexanian media -->
cristy4bf6e232011-05-21 01:43:33 +0000[diff] [blame]186</div>
187<div class="sponsor">
cristy10549a12011-05-15 19:04:46 +0000[diff] [blame]188 <a rel="follow" title="Sponsor: Hotel München" href="http://www.messehotel-erb-muenchen.de">Hotel München</a><!-- 201111010450 cerb -->
cristyaf8d6652011-02-04 21:57:45 +0000[diff] [blame]189</div>
190<div class="sponsor">
cristy10549a12011-05-15 19:04:46 +0000[diff] [blame]191 <a rel="follow" title="Sponsor: Best Web Hosting" href="http://webhostinggeeks.com">Best Web Hosting</a><!-- 201110010720 -->
cristy7d52cd62010-10-01 17:26:59 +0000[diff] [blame]192</div>
193<div class="sponsor">
cristy10549a12011-05-15 19:04:46 +0000[diff] [blame]194 <a rel="follow" title="Sponsor: Flyer drucken" href="http://www.online-druck.biz">Flyer drucken</a><!-- 201109010900 Floeter-->
cristyee742642011-02-26 02:49:59 +0000[diff] [blame]195</div>
196<div class="sponsor">
cristy10549a12011-05-15 19:04:46 +0000[diff] [blame]197 <a rel="follow" title="Sponsor: Web Hosting Ratings" href="http://webhostingrating.com">Web Hosting Ratings</a><!-- 201110010720 -->
cristybaacd172011-04-30 23:11:03 +0000[diff] [blame]198</div>
199<div class="sponsor">
cristya4dfb122011-07-07 19:01:57 +0000[diff] [blame]200 <a rel="follow" title="Sponsor: Notebook Reparatur" href="http://www.atlasmultimedia.de">Notebook Reparatur</a><!-- 2011100100025 atlas.multimedia-->
cristyec6b4752011-01-08 03:16:23 +0000[diff] [blame]201</div>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]202</div>
203</div>
cristyce69bb02010-07-27 19:49:46 +0000[diff] [blame]204</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]205
cristyce69bb02010-07-27 19:49:46 +0000[diff] [blame]206<div class="eastbar">
cristy29c5c992011-06-25 13:58:49 +0000[diff] [blame]207<div style="margin: 9pt 9pt 9pt 9pt;">
208 <div class="g-plusone" data-size="standard" data-count="false"></div>
209</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]210</div>
211
212<div class="main">
213
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]214<h1>Module distort Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]215<p class="navigation-index">[<a href="#DistortImage">DistortImage</a> &bull; <a href="#SparseColorImage">SparseColorImage</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]216
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]217<h2><a href="http://www.imagemagick.org/api/MagickCore/distort_8c.html" id="DistortImage">DistortImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]218<div class="doc-section">
219
220<p>DistortImage() distorts an image using various distortion methods, by mapping color lookups of the source image to a new destination image usally of the same size as the source image, unless 'bestfit' is set to true.</p>
221
222<p>If 'bestfit' is enabled, and distortion allows it, the destination image is adjusted to ensure the whole source 'image' will just fit within the final destination image, which will be sized and offset accordingly. Also in many cases the virtual offset of the source image will be taken into account in the mapping.</p>
223
224<p>If the '-verbose' control option has been set print to standard error the equicelent '-fx' formula with coefficients for the function, if practical.</p>
225
226<p>The format of the DistortImage() method is:</p>
227
228<pre class="code">
229 Image *DistortImage(const Image *image,const DistortImageMethod method,
230 const size_t number_arguments,const double *arguments,
231 MagickBooleanType bestfit, ExceptionInfo *exception)
232</pre>
233
234<p>A description of each parameter follows:</p>
235
236<h5>image</h5>
237<p>the image to be distorted.</p>
238
239<h5>method</h5>
240<p>the method of image distortion.</p>
241
242<p>ArcDistortion always ignores source image offset, and always 'bestfit' the destination image with the top left corner offset relative to the polar mapping center.</p>
243
244<p>Affine, Perspective, and Bilinear, do least squares fitting of the distrotion when more than the minimum number of control point pairs are provided.</p>
245
246<p>Perspective, and Bilinear, fall back to a Affine distortion when less than 4 control point pairs are provided. While Affine distortions let you use any number of control point pairs, that is Zero pairs is a No-Op (viewport only) distortion, one pair is a translation and two pairs of control points do a scale-rotate-translate, without any shearing.</p>
247
248<h5>number_arguments</h5>
249<p>the number of arguments given.</p>
250
251<h5>arguments</h5>
252<p>an array of floating point arguments for this method.</p>
253
254<h5>bestfit</h5>
255<p>Attempt to 'bestfit' the size of the resulting image. This also forces the resulting image to be a 'layered' virtual canvas image. Can be overridden using 'distort:viewport' setting.</p>
256
257<h5>exception</h5>
258<p>return any errors or warnings in this structure</p>
259
260<p>Extra Controls from Image meta-data (artifacts)...</p>
261
cristybaacd172011-04-30 23:11:03 +0000[diff] [blame]262<p>o "verbose" Output to stderr alternatives, internal coefficents, and FX equivalents for the distortion operation (if feasible). This forms an extra check of the distortion method, and allows users access to the internal constants IM calculates for the distortion.</p>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]263
264<p>o "distort:viewport" Directly set the output image canvas area and offest to use for the resulting image, rather than use the original images canvas, or a calculated 'bestfit' canvas.</p>
265
266<p>o "distort:scale" Scale the size of the output canvas by this amount to provide a method of Zooming, and for super-sampling the results.</p>
267
268<p>Other settings that can effect results include</p>
269
270<p>o 'interpolate' For source image lookups (scale enlargements)</p>
271
272<p>o 'filter' Set filter to use for area-resampling (scale shrinking). Set to 'point' to turn off and use 'interpolate' lookup instead</p>
273
274 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]275<h2><a href="http://www.imagemagick.org/api/MagickCore/distort_8c.html" id="SparseColorImage">SparseColorImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]276<div class="doc-section">
277
278<p>SparseColorImage(), given a set of coordinates, interpolates the colors found at those coordinates, across the whole image, using various methods.</p>
279
280<p>The format of the SparseColorImage() method is:</p>
281
282<pre class="code">
283 Image *SparseColorImage(const Image *image,const ChannelType channel,
284 const SparseColorMethod method,const size_t number_arguments,
285 const double *arguments,ExceptionInfo *exception)
286</pre>
287
288<p>A description of each parameter follows:</p>
289
290<h5>image</h5>
291<p>the image to be filled in.</p>
292
293<h5>channel</h5>
294<p>Specify which color values (in RGBKA sequence) are being set. This also determines the number of color_values in above.</p>
295
296<h5>method</h5>
297<p>the method to fill in the gradient between the control points.</p>
298
299<p>The methods used for SparseColor() are often simular to methods used for DistortImage(), and even share the same code for determination of the function coefficents, though with more dimensions (or resulting values).</p>
300
301<h5>number_arguments</h5>
302<p>the number of arguments given.</p>
303
304<h5>arguments</h5>
305<p>array of floating point arguments for this method-- x,y,color_values-- with color_values given as normalized values.</p>
306
307<h5>exception</h5>
308<p>return any errors or warnings in this structure</p>
309
310 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]311
312</div>
313
314<div id="linkbar">
cristyce69bb02010-07-27 19:49:46 +0000[diff] [blame]315 <span id="linkbar-west">&nbsp;</span>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]316 <span id="linkbar-center">
317 <a href="http://www.imagemagick.org/discourse-server/">Discourse Server</a> &bull;
cristya8902942010-07-30 00:49:52 +0000[diff] [blame]318 <a href="http://www.imagemagick.org/MagickStudio/scripts/MagickStudio.cgi">Studio</a>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]319 </span>
320 <span id="linkbar-east">&nbsp;</span>
321 </div>
322 <div class="footer">
cristy4103d562010-12-10 01:38:54 +0000[diff] [blame]323 <span id="footer-west">&copy; 1999-2011 ImageMagick Studio LLC</span>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]324 <span id="footer-east"> <a href="../http://www.imagemagick.org/script/contact.php">Contact the Wizards</a></span>
325 </div>
326 <div style="clear: both; margin: 0; width: 100%; "></div>
cristya8902942010-07-30 00:49:52 +0000[diff] [blame]327 <script type="text/javascript">
328 var _gaq = _gaq || [];
329 _gaq.push(['_setAccount', 'UA-17690367-1']);
330 _gaq.push(['_trackPageview']);
331
332 (function() {
333 var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
334 ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
335 var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
336 })();
337 </script>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]338</body>
339</html>