1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
2 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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">
9 <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
10 <meta name="google-site-verification" content="MxsMq6bdLOx0KSuz1MY6yG9ZTIJ7_7DVRfl5NCAT5Yg"/>
11 <title>ImageMagick: MagickWand, C API for ImageMagick: Wand View Methods</title>
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"/>
15 <meta name="application-name" content="ImageMagick"/>
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."/>
17 <meta name="application-url" content="http://www.imagemagick.org"/>
18 <meta name="generator" content="PHP"/>
19 <meta name="keywords" content="magickwc, api, for, imagemagick:, wview, methods, ImageMagick, PerlMagick, image processing, OpenMP, software development library, image, photo, software, Magick++, MagickWand"/>
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"/>
26 <meta name="copyright" content="Copyright (c) 1999-2012 ImageMagick Studio LLC"/>
27 <meta name="distribution" content="Global"/>
28 <link rel="icon" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/wand.png"/>
29 <link rel="shortcut icon" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/wand.ico" type="images/x-icon"/>
30 <link rel="canonical" href="http://www.imagemagick.org" />
31 <link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf"/>
32 <!-- Add jQuery library -->
33 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
35 <!-- Optionaly include easing and/or mousewheel plugins -->
36 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.easing-1.3.pack.js"></script>
37 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.mousewheel-3.0.6.pack.js"></script>
40 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/jquery.fancybox.css?v=2.0.4" type="text/css" media="screen" />
41 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.fancybox.pack.js?v=2.0.4"></script>
43 <!-- Optionaly include button and/or thumbnail helpers -->
44 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-buttons.css?v=2.0.4" type="text/css" media="screen" />
45 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-buttons.js?v=2.0.4"></script>
47 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-thumbs.css?v=2.0.4" type="text/css" media="screen" />
48 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-thumbs.js?v=2.0.4"></script>
49 <script type="text/javascript">
50 $(document).ready(function() {
51 $(".fancybox").fancybox();
54 <!-- ImageMagick style -->
55 <link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
56 <style type="text/css" media="all">
57 @import url("../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/magick.css");
61 <body id="www-imagemagick-org">
62 <div class="titlebar">
63 <div style="margin: 17px auto; float: left;">
64 <script type="text/javascript">
66 google_ad_client = "pub-3129977114552745";
67 google_ad_slot = "5439289906";
68 google_ad_width = 728;
69 google_ad_height = 90;
72 <script type="text/javascript"
73 src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
76 <a href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../discourse-server">
77 <img src="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/logo.jpg"
78 alt="ImageMagick Logo"
79 style="width: 123px; height: 118px; border: 0px; float: right;" /></a>
80 <a href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../index.html">
81 <img src="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/sprite.jpg"
82 alt="ImageMagick Sprite"
83 style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
89 <a title="About ImageMagick" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../index.html">About ImageMagick</a>
92 <a title="Binary Releases" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/binary-releases.html">Binary Releases</a>
95 <a title="Binary Release: Unix" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/binary-releases.html#unix">Unix</a>
98 <a title="Binary Release: MacOS X" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/binary-releases.html#macosx">Mac OS X</a>
101 <a title="Binary Release: iOS" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/binary-releases.html#iOS">iOS</a>
104 <a title="Binary Release: Windows" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/binary-releases.html#windows">Windows</a>
106 <div class="sep"></div>
108 <a title="Command-line Tools" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/command-line-tools.html">Command-line Tools</a>
111 <a title="Command-line Tools: Processing" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/command-line-processing.html">Processing</a>
114 <a title="Command-line Tools: Options" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/command-line-options.html">Options</a>
117 <a title="Command-line Tools: Usage" href="http://www.imagemagick.org/Usage/">Usage</a>
120 <a title="Program Interfaces" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/api.html">Program Interfaces</a>
123 <a title="Program Interface: MagickWand" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/magick-wand.html">MagickWand</a>
126 <a title="Program Interface: MagickCore" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/magick-core.html">MagickCore</a>
129 <a title="Program Interface: PerlMagick" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/perl-magick.html">PerlMagick</a>
132 <a title="Program Interface: Magick++" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/magick++.html">Magick++</a>
134 <div class="sep"></div>
136 <a title="Install from Source" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/install-source.html">Install from Source</a>
139 <a title="Install from Source: Unix" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/install-source.html#unix">Unix</a>
142 <a title="Install from Source: Windows" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/install-source.html#windows">Windows</a>
145 <a title="Resources" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/resources.html">Resources</a>
148 <a title="Architecture" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/architecture.html">Architecture</a>
151 <a title="Download" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/download.html">Download</a>
153 <div class="sep"></div>
155 <a title="Search" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/search.html">Search</a>
157 <div class="sep"></div>
159 <a title="Site Map" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/sitemap.html">Site Map</a>
162 <a title="Site Map: Links" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/links.html">Links</a>
164 <div class="sep"></div>
166 <a rel="follow" title="Sponsors" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/sponsors.html">Sponsors:</a>
168 <a href="http://www.networkredux.com"> <img src="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/networkredux.png" width="140" height="31" alt="[sponsor]" style="margin-top: 4px; margin-left: 4px; border: 0px; float: left;" /></a>
169 <a href="http://www.dinodirect.com/ipads-tablets/"> <img src="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/dino-direct.jpg" width="140" height="90" alt="[sponsor]" style="margin-top: 4px; margin-left: 4px; border: 0px; float: left;" /></a><!-- 201208010120 mickey@163... -->
170 <div class="sponsbox">
171 <div class="sponsor">
172 <a rel="follow" title="Sponsor: The Fastest & Easiest Way to Find Images" href="http://www.graphicsfactory.com">The Fastest & Easiest Way to Find Images</a><!-- 201210010270 graphicsfac... -->
174 <div class="sponsor">
175 <a rel="follow" title="Sponsor: VPS" href="http://www.interdominios.com/vps">VPS</a><!-- 201209010090 barsh@inter... -->
177 <div class="sponsor">
178 <a rel="follow" title="Werbebanner Werbeplane" href="http://www.allesbanner.de">Werbebanner Werbeplane</a><!-- 201212010450 info@druck... -->
180 <div class="sponsor">
181 <a rel="follow" title="Entertainment News & Photos" href="http://www.zimbio.com">Entertainment News & Photos</a><!-- 201211010540 bd@zimb... -->
183 <div class="sponsor">
184 <a rel="follow" title="Sponsor: LED24" href="http://led24.de/">LED24</a><!-- 201207010270 info@led24... -->
186 <div class="sponsor">
187 <a rel="follow" title="Sponsor: Best Website Hosting" href="http://www.top-cheap-web-hosting.com">Best Website Hosting</a><!-- 201304010090 eunge.liu-->
189 <div class="sponsor">
190 <a rel="follow" title="Android Tablet" href="http://www.dinodirect.com/ipads-tablets/">Android Tablet</a><!-- 201208010120 mickey@163... -->
192 <div class="sponsor">
193 <a rel="follow" title="Sponsor: Web Site Hosting" href="http://webhostinggeeks.com">Web Site Hosting</a><!-- 201302010900 funds@enmob... -->
195 <div class="sponsor">
196 <a rel="follow" title="Sponsor: Premium Quality Stock Photos" href="http://www.f1online.pro/en/">Premium Quality Stock Photos</a><!-- 2012080100540 ... -->
198 <div class="sponsor">
199 <a rel="follow" title="Sponsor: Druckerei" href="http://print24.com/de/">Druckerei</a><!-- 2012070100250 ... -->
201 <div class="sponsor">
202 <a rel="follow" title="Sponsor: Managed Server" href="http://www.robhost.de">Managed Server</a><!-- 201210010720 klikics... -->
204 <div class="sponsor">
205 <a rel="follow" title="Sponsor: Druckerei" href="http://www.allesdruck.de">Druckerei</a><!-- 201303011500 r.leo -->
207 <div class="sponsor">
208 <a rel="follow" title="Sponsor: Notebook Reparatur" href="http://www.notebook-reparaturen-berlin.de">Notebook Reparatur</a><!-- 2012080100300 atlas-multimedia-->
210 <div class="sponsor">
211 <a rel="follow" title="Sponsor: Web Hosting" href="http://www.hostucan.com">Web Hosting</a><!-- 2012120100150 racent marketing@webhosting...-->
217 <div class="eastbar">
218 <div class="g-plusone" id="gplusone"></div>
219 <script type="text/javascript">
225 var po = document.createElement('script');
226 po.type = 'text/javascript'; po.async = true;
227 po.src = 'https://apis.google.com/js/plusone.js';
228 var script = document.getElementsByTagName('script')[0];
229 script.parentNode.insertBefore(po, script);
231 var gplusone = document.getElementById("gplusone");
232 gplusone.setAttribute("data-size","medium");
233 gplusone.setAttribute("data-count","false");
239 <h1>Module wand-view Methods</h1>
240 <p class="navigation-index">[<a href="wand-view.html#CloneWandView">CloneWandView</a> • <a href="wand-view.html#DestroyWandView">DestroyWandView</a> • <a href="wand-view.html#DuplexTransferWandViewIterator">DuplexTransferWandViewIterator</a> • <a href="wand-view.html#GetWandViewException">GetWandViewException</a> • <a href="wand-view.html#GetWandViewExtent">GetWandViewExtent</a> • <a href="wand-view.html#GetWandViewIterator">GetWandViewIterator</a> • <a href="wand-view.html#GetWandViewPixels">GetWandViewPixels</a> • <a href="wand-view.html#GetWandViewWand">GetWandViewWand</a> • <a href="wand-view.html#IsWandView">IsWandView</a> • <a href="wand-view.html#NewWandView">NewWandView</a> • <a href="wand-view.html#NewWandViewExtent">NewWandViewExtent</a> • <a href="wand-view.html#SetWandViewDescription">SetWandViewDescription</a> • <a href="wand-view.html#SetWandViewIterator">SetWandViewIterator</a> • <a href="wand-view.html#SetWandViewThreads">SetWandViewThreads</a> • <a href="wand-view.html#TransferWandViewIterator">TransferWandViewIterator</a> • <a href="wand-view.html#UpdateWandViewIterator">UpdateWandViewIterator</a>]</p>
242 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="CloneWandView">CloneWandView</a></h2>
243 <div class="doc-section">
245 <p>CloneWandView() makes a copy of the specified wand view.</p>
247 <p>The format of the CloneWandView method is:</p>
250 WandView *CloneWandView(const WandView *wand_view)
253 <p>A description of each parameter follows:</p>
256 <p>the wand view.</p>
259 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="DestroyWandView">DestroyWandView</a></h2>
260 <div class="doc-section">
262 <p>DestroyWandView() deallocates memory associated with a wand view.</p>
264 <p>The format of the DestroyWandView method is:</p>
267 WandView *DestroyWandView(WandView *wand_view)
270 <p>A description of each parameter follows:</p>
273 <p>the wand view.</p>
276 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="DuplexTransferWandViewIterator">DuplexTransferWandViewIterator</a></h2>
277 <div class="doc-section">
279 <p>DuplexTransferWandViewIterator() iterates over three wand views in parallel and calls your transfer method for each scanline of the view. The source and duplex pixel extent is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. However, the destination wand view is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted.</p>
281 <p>The callback signature is:</p>
284 MagickBooleanType DuplexTransferImageViewMethod(const WandView *source,
285 const WandView *duplex,WandView *destination,const ssize_t y,
286 const int thread_id,void *context)
289 <p>Use this pragma if the view is not single threaded:</p>
295 <p>to define a section of code in your callback transfer method that must be executed by a single thread at a time.</p>
297 <p>The format of the DuplexTransferWandViewIterator method is:</p>
300 MagickBooleanType DuplexTransferWandViewIterator(WandView *source,
301 WandView *duplex,WandView *destination,
302 DuplexTransferWandViewMethod transfer,void *context)
305 <p>A description of each parameter follows:</p>
308 <p>the source wand view.</p>
311 <p>the duplex wand view.</p>
314 <p>the destination wand view.</p>
317 <p>the transfer callback method.</p>
320 <p>the user defined context.</p>
323 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewException">GetWandViewException</a></h2>
324 <div class="doc-section">
326 <p>GetWandViewException() returns the severity, reason, and description of any error that occurs when utilizing a wand view.</p>
328 <p>The format of the GetWandViewException method is:</p>
331 char *GetWandViewException(const WandView *wand_view,
332 ExceptionType *severity)
335 <p>A description of each parameter follows:</p>
338 <p>the pixel wand_view.</p>
341 <p>the severity of the error is returned here.</p>
344 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewExtent">GetWandViewExtent</a></h2>
345 <div class="doc-section">
347 <p>GetWandViewExtent() returns the wand view extent.</p>
349 <p>The format of the GetWandViewExtent method is:</p>
352 RectangleInfo GetWandViewExtent(const WandView *wand_view)
355 <p>A description of each parameter follows:</p>
358 <p>the wand view.</p>
361 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewIterator">GetWandViewIterator</a></h2>
362 <div class="doc-section">
364 <p>GetWandViewIterator() iterates over the wand view in parallel and calls your get method for each scanline of the view. The pixel extent is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. Any updates to the pixels in your callback are ignored.</p>
366 <p>The callback signature is:</p>
369 MagickBooleanType GetImageViewMethod(const WandView *source,
370 const ssize_t y,const int thread_id,void *context)
373 <p>Use this pragma if the view is not single threaded:</p>
379 <p>to define a section of code in your callback get method that must be executed by a single thread at a time.</p>
381 <p>The format of the GetWandViewIterator method is:</p>
384 MagickBooleanType GetWandViewIterator(WandView *source,
385 GetWandViewMethod get,void *context)
388 <p>A description of each parameter follows:</p>
391 <p>the source wand view.</p>
394 <p>the get callback method.</p>
397 <p>the user defined context.</p>
400 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewPixels">GetWandViewPixels</a></h2>
401 <div class="doc-section">
403 <p>GetWandViewPixels() returns the wand view pixel_wands.</p>
405 <p>The format of the GetWandViewPixels method is:</p>
408 PixelWand *GetWandViewPixels(const WandView *wand_view)
411 <p>A description of each parameter follows:</p>
414 <p>the wand view.</p>
417 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewWand">GetWandViewWand</a></h2>
418 <div class="doc-section">
420 <p>GetWandViewWand() returns the magick wand associated with the wand view.</p>
422 <p>The format of the GetWandViewWand method is:</p>
425 MagickWand *GetWandViewWand(const WandView *wand_view)
428 <p>A description of each parameter follows:</p>
431 <p>the wand view.</p>
434 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="IsWandView">IsWandView</a></h2>
435 <div class="doc-section">
437 <p>IsWandView() returns MagickTrue if the the parameter is verified as a wand view object.</p>
439 <p>The format of the IsWandView method is:</p>
442 MagickBooleanType IsWandView(const WandView *wand_view)
445 <p>A description of each parameter follows:</p>
448 <p>the wand view.</p>
451 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="NewWandView">NewWandView</a></h2>
452 <div class="doc-section">
454 <p>NewWandView() returns a wand view required for all other methods in the Wand View API.</p>
456 <p>The format of the NewWandView method is:</p>
459 WandView *NewWandView(MagickWand *wand)
462 <p>A description of each parameter follows:</p>
468 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="NewWandViewExtent">NewWandViewExtent</a></h2>
469 <div class="doc-section">
471 <p>NewWandViewExtent() returns a wand view required for all other methods in the Wand View API.</p>
473 <p>The format of the NewWandViewExtent method is:</p>
476 WandView *NewWandViewExtent(MagickWand *wand,const ssize_t x,
477 const ssize_t y,const size_t width,const size_t height)
480 <p>A description of each parameter follows:</p>
483 <p>the magick wand.</p>
485 <h5>x,y,columns,rows</h5>
486 <p>These values define the perimeter of a extent of pixel_wands view.</p>
489 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="SetWandViewDescription">SetWandViewDescription</a></h2>
490 <div class="doc-section">
492 <p>SetWandViewDescription() associates a description with an image view.</p>
494 <p>The format of the SetWandViewDescription method is:</p>
497 void SetWandViewDescription(WandView *image_view,const char *description)
500 <p>A description of each parameter follows:</p>
503 <p>the wand view.</p>
506 <p>the wand view description.</p>
509 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="SetWandViewIterator">SetWandViewIterator</a></h2>
510 <div class="doc-section">
512 <p>SetWandViewIterator() iterates over the wand view in parallel and calls your set method for each scanline of the view. The pixel extent is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension. The pixels are initiallly undefined and any settings you make in the callback method are automagically synced back to your image.</p>
514 <p>The callback signature is:</p>
517 MagickBooleanType SetImageViewMethod(ImageView *destination,
518 const ssize_t y,const int thread_id,void *context)
521 <p>Use this pragma if the view is not single threaded:</p>
527 <p>to define a section of code in your callback set method that must be executed by a single thread at a time.</p>
529 <p>The format of the SetWandViewIterator method is:</p>
532 MagickBooleanType SetWandViewIterator(WandView *destination,
533 SetWandViewMethod set,void *context)
536 <p>A description of each parameter follows:</p>
539 <p>the wand view.</p>
542 <p>the set callback method.</p>
545 <p>the user defined context.</p>
548 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="SetWandViewThreads">SetWandViewThreads</a></h2>
549 <div class="doc-section">
551 <p>SetWandViewThreads() sets the number of threads in a thread team.</p>
553 <p>The format of the SetWandViewDescription method is:</p>
556 void SetWandViewThreads(WandView *image_view,
557 const size_t number_threads)
560 <p>A description of each parameter follows:</p>
563 <p>the image view.</p>
565 <h5>number_threads</h5>
566 <p>the number of threads in a thread team.</p>
569 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="TransferWandViewIterator">TransferWandViewIterator</a></h2>
570 <div class="doc-section">
572 <p>TransferWandViewIterator() iterates over two wand views in parallel and calls your transfer method for each scanline of the view. The source pixel extent is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. However, the destination wand view is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted.</p>
574 <p>The callback signature is:</p>
577 MagickBooleanType TransferImageViewMethod(const WandView *source,
578 WandView *destination,const ssize_t y,const int thread_id,
582 <p>Use this pragma if the view is not single threaded:</p>
588 <p>to define a section of code in your callback transfer method that must be executed by a single thread at a time.</p>
590 <p>The format of the TransferWandViewIterator method is:</p>
593 MagickBooleanType TransferWandViewIterator(WandView *source,
594 WandView *destination,TransferWandViewMethod transfer,void *context)
597 <p>A description of each parameter follows:</p>
600 <p>the source wand view.</p>
603 <p>the destination wand view.</p>
606 <p>the transfer callback method.</p>
609 <p>the user defined context.</p>
612 <h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="UpdateWandViewIterator">UpdateWandViewIterator</a></h2>
613 <div class="doc-section">
615 <p>UpdateWandViewIterator() iterates over the wand view in parallel and calls your update method for each scanline of the view. The pixel extent is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted. Updates to pixels in your callback are automagically synced back to the image.</p>
617 <p>The callback signature is:</p>
620 MagickBooleanType UpdateImageViewMethod(WandView *source,const ssize_t y,
621 const int thread_id,void *context)
624 <p>Use this pragma if the view is not single threaded:</p>
630 <p>to define a section of code in your callback update method that must be executed by a single thread at a time.</p>
632 <p>The format of the UpdateWandViewIterator method is:</p>
635 MagickBooleanType UpdateWandViewIterator(WandView *source,
636 UpdateWandViewMethod update,void *context)
639 <p>A description of each parameter follows:</p>
642 <p>the source wand view.</p>
645 <p>the update callback method.</p>
648 <p>the user defined context.</p>
655 <span id="linkbar-west"> </span>
656 <span id="linkbar-center">
657 <a href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../discourse-server">Discourse Server</a> •
658 <a href="http://www.imagemagick.org/MagickStudio/scripts/MagickStudio.cgi">Studio</a>
660 <span id="linkbar-east"> </span>
663 <span id="footer-west">© 1999-2012 ImageMagick Studio LLC</span>
664 <span id="footer-east"> <a href="http://www.imagemagick.org/script/contact.php">Contact the Wizards</a></span>
666 <div style="clear: both; margin: 0; width: 100%; "></div>
667 <script type="text/javascript">
668 var _gaq = _gaq || [];
669 _gaq.push(['_setAccount', 'UA-17690367-1']);
670 _gaq.push(['_trackPageview']);
673 var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
674 ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
675 var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);