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12 <title>ImageMagick: MagickCore, Low-level C API for ImageMagick</title>
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18 <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."/>
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48 <a href="../index.html">About ImageMagick</a>
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157 <p>The <a href="../www/api/MagickCore/index.html">MagickCore API</a> is a low-level interface between the C programming language and the ImageMagick image processing libraries and is recommended for wizard-level programmers only. Unlike the <a href="../www/magick-wand.html">MagickWand</a> C API which uses only a few opaque types and accessors, with MagickCore you almost exlusively access the structure members directly. A description of the MagickCore public methods are found here:</p>
160 <li><a href="../www/api/magick.html">Initialize or Destroy the ImageMagick Environment</a></li>
161 <li><a href="../www/api/constitute.html">Constitute an Image</a></li>
162 <li><a href="../www/api/composite.html">Composite an Image</a></li>
163 <li><a href="../www/api/image.html">Image Methods</a></li>
164 <li><a href="../www/api/color.html">Count the Colors in an Image</a></li>
165 <li><a href="../www/api/distort.html">Image Distortions</a></li>
166 <li><a href="../www/api/layer.html">Dealing with Image Layers</a></li>
167 <li><a href="../www/api/profile.html">Dealing with Image Profiles</a></li>
168 <li><a href="../www/api/quantize.html">Reduce the Number of Unique Colors in an Image</a></li>
169 <li><a href="../www/api/histogram.html">Image Histograms</a></li>
170 <li><a href="../www/api/segment.html">Segment an Image with Thresholding Fuzzy c-Means</a></li>
171 <li><a href="../www/api/resize.html">Resize an Image</a></li>
172 <li><a href="../www/api/transform.html">Transform an Image</a></li>
173 <li><a href="../www/api/shear.html">Shear or Rotate an Image by an Arbitrary Angle</a></li>
174 <li><a href="../www/api/enhance.html">Enhance an Image</a></li>
175 <li><a href="../www/api/effect.html">Add an Effect</a></li>
176 <li><a href="../www/api/fx.html">Add a Special Effect</a></li>
177 <li><a href="../www/api/decorate.html">Decorate an Image</a></li>
178 <li><a href="../www/api/property.html">Get/Set Image Properties</a></li>
179 <li><a href="../www/api/annotate.html">Annotate an Image</a></li>
180 <li><a href="../www/api/paint.html">Paint on an Image</a></li>
181 <li><a href="../www/api/draw.html">Draw on an Image</a></li>
182 <li><a href="../www/api/montage.html">Create an Image Thumbnail</a></li>
183 <li><a href="../www/api/fourier.html">Compute the discrete Fourier transform (DFT)</a></li>
184 <li><a href="../www/api/compare.html">Compare an Image to a Reconstructed Image</a></li>
185 <li><a href="../www/api/display.html">Interactively Display and Edit an Image</a></li>
186 <li><a href="../www/api/animate.html">Interactively Animate an Image Sequence</a></li>
187 <li><a href="../www/api/cipher.html">Convert to and from Cipher Pixels</a></li>
188 <li><a href="../www/api/list.html">Working with Image Lists</a></li>
189 <li><a href="../www/api/cache.html">Get or Set Image Pixels</a></li>
190 <li><a href="../www/api/cache-view.html">Working with Cache Views</a></li>
191 <li><a href="../www/api/stream.html">The Pixel FIFO</a></li>
192 <li><a href="../www/api/blob.html">Read or Write Binary Large OBjects</a></li>
193 <li><a href="../www/api/module.html">Loadable Modules</a></li>
194 <li><a href="../www/api/signature.html">Compute a Message Digest for an Image</a></li>
195 <li><a href="../www/api/registry.html">The Image Registry</a></li>
196 <li><a href="../www/api/exception.html">Dealing with Exceptions</a></li>
197 <li><a href="../www/api/memory.html">Memory Allocation</a></li>
198 <li><a href="../www/api/resource.html">Monitor or Limit Resource Consumption</a></li>
199 <li><a href="../www/api/monitor.html">Monitor the Progress of an Image Operation</a></li>
200 <li><a href="../www/api/version.html">Get the Version and Copyrights</a></li>
201 <li><a href="../www/api/deprecate.html">Deprecated Methods</a></li>
202 <li><a href="../www/exception.html">Error and Warning Codes</a></li>
205 <p>After you write your MagickCore program, compile it like this:</p>
207 <p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>cc `MagickCore-config --cflags --cppflags` core.c `MagickCore-config --ldflags --libs`</span></p>
208 <p>Here is a example program that utilizes the MagickCore API to get you started, <a href="../www/source/core.c">core.c</a>. It reads a GIF image, creates a thumbnail, and writes it to disk in the PNG image format.</p>
210 <div class="viewport">
212 #include <stdio.h>
213 #include <stdlib.h>
214 #include <string.h>
216 #include <magick/MagickCore.h>
218 int main(int argc,char **argv)
234 (void) fprintf(stdout,"Usage: %s image thumbnail\n",argv[0]);
238 Initialize the image info structure and read an image.
240 MagickCoreGenesis(*argv,MagickTrue);
241 exception=AcquireExceptionInfo();
242 image_info=CloneImageInfo((ImageInfo *) NULL);
243 (void) strcpy(image_info->filename,argv[1]);
244 images=ReadImage(image_info,exception);
245 if (exception->severity != UndefinedException)
246 CatchException(exception);
247 if (images == (Image *) NULL)
250 Convert the image to a thumbnail.
252 thumbnails=NewImageList();
253 while ((image=RemoveFirstImageFromList(&images)) != (Image *) NULL)
255 resize_image=ResizeImage(image,106,80,LanczosFilter,1.0,exception);
256 if (resize_image == (Image *) NULL)
257 MagickError(exception->severity,exception->reason,exception->description);
258 (void) AppendImageToList(&thumbnails,resize_image);
262 Write the image thumbnail.
264 (void) strcpy(thumbnails->filename,argv[2]);
265 WriteImage(image_info,thumbnails);
267 Destroy the image thumbnail and exit.
269 thumbnails=DestroyImageList(thumbnails);
270 image_info=DestroyImageInfo(image_info);
271 exception=DestroyExceptionInfo(exception);
272 MagickCoreTerminus();
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