2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
\r
3 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
\r
4 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
\r
6 <meta http-equiv="Content-Type" value="application/xhtml+xml" />
\r
7 <meta name="verify-v1" content="g222frIIxcQTrvDR3NBRUSKP3AnMNoqxOkIniCEkV7U=" />
\r
8 <link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf" />
\r
9 <style type="text/css" media="screen,projection"><!--
\r
10 @import url("../www/magick.css");
\r
12 <link rel="shortcut icon" href="../images/wand.ico" type="images/vnd.microsoft.icon"/>
13 <title>ImageMagick: MagickWand, C API for ImageMagick</title>
14 <meta http-equiv="Content-Language" content="en-US"/>
15 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
16 <meta http-equiv="Reply-to" content="magick-users@imagemagick.org"/>
17 <meta name="Generator" content="PHP"/>
18 <meta name="Keywords" content="magickwc, api, for, imagemagick, ImageMagick, ImageMagic, MagickCore, MagickWand, PerlMagick, Magick++, RMagick, PythonMagick, JMagick, TclMagick, Image, Magick, Magic, Wand, ImageMagickObject, Swiss, Army, Knife, Image, Processing"/>
19 <meta name="Description" content="ImageMagick® is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX. Use ImageMagick to translate, flip, mirror, rotate, scale, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves. ImageMagick is free software delivered as a ready-to-run binary distribution or as source code that you can freely use, copy, modify, and distribute. Its license is compatible with the GPL. It runs on all major operating systems. The functionality of ImageMagick is typically utilized from the command line or you can use the features from programs written in your favorite programming language. Choose from these interfaces: MagickCore (C), MagickWand (C), ChMagick (Ch), Magick++ (C++), JMagick (Java), L-Magick (Lisp), PascalMagick (Pascal), PerlMagick (Perl), MagickWand for PHP (PHP), PythonMagick (Python), RMagick (Ruby), or TclMagick (Tcl/TK). With a language interface, use ImageMagick to modify or create images automagically and dynamically."/>
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) 1999-2010 ImageMagick Studio LLC"/>
27 <meta name="Distribution" content="Global"/>
30 <body id="www-imagemagick-org">
\r
31 <div class="titlebar">
\r
32 <a href="../index.html">
\r
33 <img src="../images/script.png" alt="[ImageMagick]"
\r
34 style="width: 350px; height: 60px; margin: 28px auto; float: left;" /></a>
\r
35 <a href="http://www.networkredux.com">
\r
36 <img src="../images/networkredux.png" alt="[sponsor]"
\r
37 style="margin: 45px auto; border: 0px; float: left;" /></a>
\r
38 <a href="http://www.imagemagick.org/discourse-server/">
\r
39 <img src="../images/logo.jpg" alt=""
\r
40 style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
\r
41 <a href="../index.html">
\r
42 <img src="../images/sprite.jpg" alt=""
\r
43 style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
\r
46 <div class="eastbar">
\r
49 <a href="../index.html">About ImageMagick</a>
51 <div class="sep"></div>
\r
53 <a href="../www/command-line-tools.html">Command-line Tools</a>
56 <a href="../www/command-line-processing.html">Processing</a>
59 <a href="../www/command-line-options.html">Options</a>
62 <a href="http://www.imagemagick.org/Usage/">Usage</a>
65 <a href="../www/api.html">Program Interfaces</a>
68 <a href="../www/magick-wand.html">MagickWand</a>
71 <a href="../www/magick-core.html">MagickCore</a>
74 <a href="../www/perl-magick.html">PerlMagick</a>
77 <a href="../Magick++/">Magick++</a>
80 <a href="../www/architecture.html">Architecture</a>
82 <div class="sep"></div>
\r
84 <a href="../www/install-source.html">Install from Source</a>
87 <a href="../www/install-source.html#unix">Unix</a>
90 <a href="../www/install-source.html#windows">Windows</a>
93 <a href="../www/binary-releases.html">Binary Releases</a>
96 <a href="../www/binary-releases.html#unix">Unix</a>
99 <a href="../www/binary-releases.html#macosx">Mac OS X</a>
102 <a href="../www/binary-releases.html#windows">Windows</a>
105 <a href="../www/resources.html">Resources</a>
107 <div class="sep"></div>
\r
109 <a href="../www/download.html">Download</a>
111 <div class="sep"></div>
\r
113 <a href="http://www.imagemagick.org/script/search.php">Search</a>
115 <div class="sep"></div>
\r
117 <a href="../www/sitemap.html">Site Map</a>
120 <a href="../www/links.html">Links</a>
122 <div class="sep"></div>
\r
124 <a href="../www/sponsors.html">Sponsors:</a>
126 <div class="sponsbox">
127 <div class="sponsor">
128 <a href="http://www.hygi.de">Reinigungsmittel</a><!-- 201002000400+ -->
130 <div class="sponsor">
131 <a href="http://www.tomsgutscheine.de">Tom's Gutscheine</a><!-- 201005010360 invendio.de-->
133 <div class="sponsor">
134 <a href="http://www.online-kredit-index.de">Kredit</a><!-- 201006010120 Buchhorn -->
136 <div class="sponsor">
137 <a href="http://www.blumenversender.com">Blumenversand</a><!-- 201005010120 -->
139 <div class="sponsor">
140 <a href="http://www.print24.de/">Druckerei</a><!-- 201009010720 -->
142 <div class="sponsor">
143 <a href="http://www.goyax.de">Börse</a><!-- 201004010240 Gewiese digital-finance.de -->
145 <div class="sponsor">
146 <a href="http://www.allesdruck.de">Druckerei Online</a><!-- 201012011200 allesdruck.de-->
148 <div class="sponsor">
149 <a href="http://www.who-sells-it.com/">Free Catalogs</a><!-- 201002010000 -->
159 <p class="navigation-index"></p>
161 <p>The <a href="../www/api/MagickWand/index.html">MagickWand API</a> is the recommended interface between the C programming language and the ImageMagick image processing libraries. Unlike the <a href="../www/magick-core.html">MagickCore</a> C API, MagickWand uses only a few opaque types. Accessors are available to set or get important wand properties. A description of the MagickWand public methods are found here:</p>
164 <li><a href="../www/api/magick-wand.html">Magick Wand Methods</a></li>
165 <li><a href="../www/api/magick-property.html">Set or Get Magick Wand Properties</a></li>
166 <li><a href="../www/api/magick-image.html">Magick Wand Image Methods</a></li>
167 <li><a href="../www/api/pixel-iterator.html">Pixel Iterator Methods</a></li>
168 <li><a href="../www/api/pixel-view.html">Pixel View Methods</a></li>
169 <li><a href="../www/api/pixel-wand.html">Pixel Wand Methods</a></li>
170 <li><a href="../www/api/drawing-wand.html">Image Vector Drawing</a></li>
171 <li><a href="../www/api/magick-deprecate.html">Deprecated Methods</a></li>
172 <li><a href="../www/exception.html">Error and Warning Codes</a></li>
176 <p>After you write your MagickWand program, compile it like this:</p>
178 <p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>cc `MagickWand-config --cflags --cppflags` -o wand wand.c `MagickWand-config --ldflags --libs`</span></p>
179 <p>Here is a example program that utilizes the MagickWand API to get you started, <a href="../www/source/wand.c">wand.c</a>. It reads an image, creates a thumbnail, and writes the result to disk.</p>
181 <div class="viewport">
183 #include <stdio.h>
184 #include <stdlib.h>
185 #include <wand/MagickWand.h>
187 int main(int argc,char **argv)
189 #define ThrowWandException(wand) \
197 description=MagickGetException(wand,&severity); \
198 (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); \
199 description=(char *) MagickRelinquishMemory(description); \
211 (void) fprintf(stdout,"Usage: %s image thumbnail\n",argv[0]);
218 magick_wand=NewMagickWand();
219 status=MagickReadImage(magick_wand,argv[1]);
220 if (status == MagickFalse)
221 ThrowWandException(magick_wand);
223 Turn the images into a thumbnail sequence.
225 MagickResetIterator(magick_wand);
226 while (MagickNextImage(magick_wand) != MagickFalse)
227 MagickResizeImage(magick_wand,106,80,LanczosFilter,1.0);
229 Write the image then destroy it.
231 status=MagickWriteImages(magick_wand,argv[2],MagickTrue);
232 if (status == MagickFalse)
233 ThrowWandException(magick_wand);
234 magick_wand=DestroyMagickWand(magick_wand);
235 MagickWandTerminus();
241 <p>Here is another program that shows one way to get and set image pixels with the MagickWand API, <a href="../www/source/contrast.c">contrast.c</a>. It reads an image, applies sigmoidal non-linearity contrast control, and writes the result to disk.</p>
243 <div class="viewport">
245 #include <stdio.h>
246 #include <stdlib.h>
248 #include <wand/MagickWand.h>
250 int main(int argc,char **argv)
252 #define QuantumScale ((MagickRealType) 1.0/(MagickRealType) QuantumRange)
253 #define SigmoidalContrast(x) \
254 (QuantumRange*(1.0/(1+exp(10.0*(0.5-QuantumScale*x)))-0.0066928509)*1.0092503)
255 #define ThrowWandException(wand) \
263 description=MagickGetException(wand,&severity); \
264 (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); \
265 description=(char *) MagickRelinquishMemory(description); \
298 (void) fprintf(stdout,"Usage: %s image sigmoidal-image\n",argv[0]);
305 image_wand=NewMagickWand();
306 status=MagickReadImage(image_wand,argv[1]);
307 if (status == MagickFalse)
308 ThrowWandException(image_wand);
309 contrast_wand=CloneMagickWand(image_wand);
311 Sigmoidal non-linearity contrast control.
313 iterator=NewPixelIterator(image_wand);
314 contrast_iterator=NewPixelIterator(contrast_wand);
315 if ((iterator == (PixelIterator *) NULL) ||
316 (contrast_iterator == (PixelIterator *) NULL))
317 ThrowWandException(image_wand);
318 for (y=0; y < (long) MagickGetImageHeight(image_wand); y++)
320 pixels=PixelGetNextIteratorRow(iterator,&width);
321 contrast_pixels=PixelGetNextIteratorRow(contrast_iterator,&width);
322 if ((pixels == (PixelWand **) NULL) ||
323 (contrast_pixels == (PixelWand **) NULL))
325 for (x=0; x < (long) width; x++)
327 PixelGetMagickColor(pixels[x],&pixel);
328 pixel.red=SigmoidalContrast(pixel.red);
329 pixel.green=SigmoidalContrast(pixel.green);
330 pixel.blue=SigmoidalContrast(pixel.blue);
331 pixel.index=SigmoidalContrast(pixel.index);
332 PixelSetMagickColor(contrast_pixels[x],&pixel);
334 (void) PixelSyncIterator(contrast_iterator);
336 if (y < (long) MagickGetImageHeight(image_wand))
337 ThrowWandException(image_wand);
338 contrast_iterator=DestroyPixelIterator(contrast_iterator);
339 iterator=DestroyPixelIterator(iterator);
340 image_wand=DestroyMagickWand(image_wand);
342 Write the image then destroy it.
344 status=MagickWriteImages(contrast_wand,argv[2],MagickTrue);
345 if (status == MagickFalse)
346 ThrowWandException(image_wand);
347 contrast_wand=DestroyMagickWand(contrast_wand);
348 MagickWandTerminus();
353 <p>Now lets perform the same contrast enhancement while taking advantage of our dual or quad-core processing system by running the algorithm in parallel utilizing pixel views. The <a href="../www/source/sigmoidal-contrast.c">sigmoidal-contrast.c</a> module reads an image, applies sigmoidal non-linearity contrast control, and writes the result to disk just like the previous contrast enhancement program, but now it does its work in parallel (assumes ImageMagick is built with OpenMP support).</p>
355 <div class="viewport">
357 #include <stdio.h>
358 #include <stdlib.h>
360 #include <wand/MagickWand.h>
362 static MagickBooleanType SigmoidalContrast(PixelView *pixel_view,
365 #define QuantumScale ((MagickRealType) 1.0/(MagickRealType) QuantumRange)
366 #define SigmoidalContrast(x) \
367 (QuantumRange*(1.0/(1+exp(10.0*(0.5-QuantumScale*x)))-0.0066928509)*1.0092503)
378 pixels=GetPixelViewPixels(contrast_view);
379 for (x=0; x < (long) GetPixelViewWidth(contrast_view); x++)
381 PixelGetMagickColor(pixels[x],&pixel);
382 pixel.red=SigmoidalContrast(pixel.red);
383 pixel.green=SigmoidalContrast(pixel.green);
384 pixel.blue=SigmoidalContrast(pixel.blue);
385 pixel.index=SigmoidalContrast(pixel.index);
386 PixelSetMagickColor(contrast_pixels[x],&pixel);
391 int main(int argc,char **argv)
393 #define ThrowWandException(wand) \
401 description=MagickGetException(wand,&severity); \
402 (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); \
403 description=(char *) MagickRelinquishMemory(description); \
421 (void) fprintf(stdout,"Usage: %s image sigmoidal-image\n",argv[0]);
428 contrast_wand=NewMagickWand();
429 status=MagickReadImage(contrast_wand,argv[1]);
430 if (status == MagickFalse)
431 ThrowWandException(contrast_wand);
433 Sigmoidal non-linearity contrast control.
435 contrast_view=NewPixelView(contrast_wand);
436 if (contrast_view == (PixelView *) NULL)
437 ThrowWandException(contrast_wand);
438 status=UpdatePixelViewIterator(contrast_view,SigmoidalContrast,(void *) NULL);
439 if (status == MagickFalse)
440 ThrowWandException(contrast_wand);
441 contrast_view=DestroyPixelView(contrast_view);
443 Write the image then destroy it.
445 status=MagickWriteImages(contrast_wand,argv[2],MagickTrue);
446 if (status == MagickFalse)
447 ThrowWandException(contrast_wand);
448 contrast_wand=DestroyMagickWand(contrast_wand);
449 MagickWandTerminus();
458 <!-- <span id="linkbar-west"> </span> -->
\r
459 <span id="linkbar-center">
\r
460 <a href="http://www.imagemagick.org/discourse-server/">Discourse Server</a> •
\r
461 <a href="../www/mailing-list.html">Mailing Lists</a> •
\r
462 <a href="http://studio.webbyland.com/ImageMagick/MagickStudio/scripts/MagickStudio.cgi">Studio</a>
\r
464 <span id="linkbar-east"> </span>
\r
466 <div class="footer">
\r
467 <span id="footer-west">© 1999-2010 ImageMagick Studio LLC</span>
\r
468 <span id="footer-east"> <a href="http://www.imagemagick.org/script/contact.php">Contact the Wizards</a></span>
\r
470 <div style="clear: both; margin: 0; width: 100%; "></div>
\r