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cristy307ba182010-12-25 01:00:34 +0000181<h1>Module transform
182 Methods</h1>
cristyf1196bb2010-02-13 21:18:03 +0000183<p class="navigation-index">[<a href="#ChopImage">ChopImage</a> &bull; <a href="#CropImage">CropImage</a> &bull; <a href="#ExcerptImage">ExcerptImage</a> &bull; <a href="#ExtentImage">ExtentImage</a> &bull; <a href="#FlipImage">FlipImage</a> &bull; <a href="#FlopImage">FlopImage</a> &bull; <a href="#RollImage">RollImage</a> &bull; <a href="#ShaveImage">ShaveImage</a> &bull; <a href="#SpliceImage">SpliceImage</a> &bull; <a href="#TransformImage">TransformImage</a> &bull; <a href="#TransformImages">TransformImages</a> &bull; <a href="#TransposeImage">TransposeImage</a> &bull; <a href="#TransverseImage">TransverseImage</a> &bull; <a href="#TrimImage">TrimImage</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000184
cristy7a40ba82011-01-08 20:31:18 +0000185<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
186_8c.html" id="ChopImage">ChopImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000187<div class="doc-section">
188
cristy7a40ba82011-01-08 20:31:18 +0000189<p>ChopImage() removes a region of an image and collapses the image to occupy the removed portion.</p>
cristy3ed852e2009-09-05 21:47:34 +0000190
191<p>The format of the ChopImage method is:</p>
192
193<pre class="code">
194 Image *ChopImage(const Image *image,const RectangleInfo *chop_info)
195 ExceptionInfo *exception)
196</pre>
197
cristy7a40ba82011-01-08 20:31:18 +0000198<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000199
200<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000201<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000202
203<h5>chop_info</h5>
cristy7a40ba82011-01-08 20:31:18 +0000204<p>Define the region of the image to chop.</p>
cristy3ed852e2009-09-05 21:47:34 +0000205
206<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000207<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000208
209 </div>
cristy7a40ba82011-01-08 20:31:18 +0000210<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
211_8c.html" id="CropImage">CropImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000212<div class="doc-section">
213
cristy7a40ba82011-01-08 20:31:18 +0000214<p>CropImage() extracts a region of the image starting at the offset defined by geometry.</p>
cristy3ed852e2009-09-05 21:47:34 +0000215
216<p>The format of the CropImage method is:</p>
217
218<pre class="code">
219 Image *CropImage(const Image *image,const RectangleInfo *geometry,
220 ExceptionInfo *exception)
221</pre>
222
cristy7a40ba82011-01-08 20:31:18 +0000223<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000224
225<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000226<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000227
228<h5>geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000229<p>Define the region of the image to crop with members x, y, width, and height.</p>
cristy3ed852e2009-09-05 21:47:34 +0000230
231<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000232<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000233
234 </div>
cristy7a40ba82011-01-08 20:31:18 +0000235<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
236_8c.html" id="ExcerptImage">ExcerptImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000237<div class="doc-section">
238
cristy7a40ba82011-01-08 20:31:18 +0000239<p>ExcerptImage() returns a excerpt of the image as defined by the geometry.</p>
cristy3ed852e2009-09-05 21:47:34 +0000240
241<p>The format of the ExcerptImage method is:</p>
242
243<pre class="code">
244 Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
245 ExceptionInfo *exception)
246</pre>
247
cristy7a40ba82011-01-08 20:31:18 +0000248<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000249
250<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000251<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000252
253<h5>geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000254<p>Define the region of the image to extend with members x, y, width, and height.</p>
cristy3ed852e2009-09-05 21:47:34 +0000255
256<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000257<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000258
259 </div>
cristy7a40ba82011-01-08 20:31:18 +0000260<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
261_8c.html" id="ExtentImage">ExtentImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000262<div class="doc-section">
263
cristy7a40ba82011-01-08 20:31:18 +0000264<p>ExtentImage() extends the image as defined by the geometry, gravity, and image background color. Set the (x,y) offset of the geometry to move the original image relative to the extended image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000265
266<p>The format of the ExtentImage method is:</p>
267
268<pre class="code">
269 Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
270 ExceptionInfo *exception)
271</pre>
272
cristy7a40ba82011-01-08 20:31:18 +0000273<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000274
275<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000276<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000277
278<h5>geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000279<p>Define the region of the image to extend with members x, y, width, and height.</p>
cristy3ed852e2009-09-05 21:47:34 +0000280
281<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000282<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000283
284 </div>
cristy7a40ba82011-01-08 20:31:18 +0000285<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
286_8c.html" id="FlipImage">FlipImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000287<div class="doc-section">
288
cristy7a40ba82011-01-08 20:31:18 +0000289<p>FlipImage() creates a vertical mirror image by reflecting the pixels around the central x-axis.</p>
cristy3ed852e2009-09-05 21:47:34 +0000290
291<p>The format of the FlipImage method is:</p>
292
293<pre class="code">
294 Image *FlipImage(const Image *image,ExceptionInfo *exception)
295</pre>
296
cristy7a40ba82011-01-08 20:31:18 +0000297<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000298
299<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000300<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000301
302<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000303<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000304
305 </div>
cristy7a40ba82011-01-08 20:31:18 +0000306<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
307_8c.html" id="FlopImage">FlopImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000308<div class="doc-section">
309
cristy7a40ba82011-01-08 20:31:18 +0000310<p>FlopImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis.</p>
cristy3ed852e2009-09-05 21:47:34 +0000311
312<p>The format of the FlopImage method is:</p>
313
314<pre class="code">
315 Image *FlopImage(const Image *image,ExceptionInfo *exception)
316</pre>
317
cristy7a40ba82011-01-08 20:31:18 +0000318<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000319
320<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000321<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000322
323<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000324<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000325
326 </div>
cristy7a40ba82011-01-08 20:31:18 +0000327<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
328_8c.html" id="RollImage">RollImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000329<div class="doc-section">
330
cristy7a40ba82011-01-08 20:31:18 +0000331<p>RollImage() offsets an image as defined by x_offset and y_offset.</p>
cristy3ed852e2009-09-05 21:47:34 +0000332
333<p>The format of the RollImage method is:</p>
334
335<pre class="code">
cristybb503372010-05-27 20:51:26 +0000336 Image *RollImage(const Image *image,const ssize_t x_offset,
337 const ssize_t y_offset,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000338</pre>
339
cristy7a40ba82011-01-08 20:31:18 +0000340<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000341
342<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000343<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000344
345<h5>x_offset</h5>
cristy7a40ba82011-01-08 20:31:18 +0000346<p>the number of columns to roll in the horizontal direction.</p>
cristy3ed852e2009-09-05 21:47:34 +0000347
348<h5>y_offset</h5>
cristy7a40ba82011-01-08 20:31:18 +0000349<p>the number of rows to roll in the vertical direction.</p>
cristy3ed852e2009-09-05 21:47:34 +0000350
351<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000352<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000353
354 </div>
cristy7a40ba82011-01-08 20:31:18 +0000355<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
356_8c.html" id="ShaveImage">ShaveImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000357<div class="doc-section">
358
cristy7a40ba82011-01-08 20:31:18 +0000359<p>ShaveImage() shaves pixels from the image edges. It allocates the memory necessary for the new Image structure and returns a pointer to the new image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000360
361<p>The format of the ShaveImage method is:</p>
362
363<pre class="code">
364 Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
365 ExceptionInfo *exception)
366</pre>
367
cristy7a40ba82011-01-08 20:31:18 +0000368<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000369
370<h5>shave_image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000371<p>Method ShaveImage returns a pointer to the shaved image. A null image is returned if there is a memory shortage or if the image width or height is zero.</p>
cristy3ed852e2009-09-05 21:47:34 +0000372
373<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000374<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000375
376<h5>shave_info</h5>
cristy7a40ba82011-01-08 20:31:18 +0000377<p>Specifies a pointer to a RectangleInfo which defines the region of the image to crop.</p>
cristy3ed852e2009-09-05 21:47:34 +0000378
379<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000380<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000381
382 </div>
cristy7a40ba82011-01-08 20:31:18 +0000383<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
384_8c.html" id="SpliceImage">SpliceImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000385<div class="doc-section">
386
cristy7a40ba82011-01-08 20:31:18 +0000387<p>SpliceImage() splices a solid color into the image as defined by the geometry.</p>
cristy3ed852e2009-09-05 21:47:34 +0000388
389<p>The format of the SpliceImage method is:</p>
390
391<pre class="code">
392 Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
393 ExceptionInfo *exception)
394</pre>
395
cristy7a40ba82011-01-08 20:31:18 +0000396<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000397
398<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000399<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000400
401<h5>geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000402<p>Define the region of the image to splice with members x, y, width, and height.</p>
cristy3ed852e2009-09-05 21:47:34 +0000403
404<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000405<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000406
407 </div>
cristy7a40ba82011-01-08 20:31:18 +0000408<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
409_8c.html" id="TransformImage">TransformImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000410<div class="doc-section">
411
cristy7a40ba82011-01-08 20:31:18 +0000412<p>TransformImage() is a convenience method that behaves like ResizeImage() or CropImage() but accepts scaling and/or cropping information as a region geometry specification. If the operation fails, the original image handle is returned.</p>
cristy3ed852e2009-09-05 21:47:34 +0000413
414<p>The format of the TransformImage method is:</p>
415
416<pre class="code">
417 MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
418 const char *image_geometry)
419</pre>
420
cristy7a40ba82011-01-08 20:31:18 +0000421<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000422
423<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000424<p>the image The transformed image is returned as this parameter.</p>
cristy3ed852e2009-09-05 21:47:34 +0000425
426<h5>crop_geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000427<p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
cristy3ed852e2009-09-05 21:47:34 +0000428
429<h5>image_geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000430<p>An image geometry string. This geometry defines the final size of the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000431
432 </div>
cristy7a40ba82011-01-08 20:31:18 +0000433<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
434_8c.html" id="TransformImages">TransformImages</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000435<div class="doc-section">
436
cristy7a40ba82011-01-08 20:31:18 +0000437<p>TransformImages() calls TransformImage() on each image of a sequence.</p>
cristy3ed852e2009-09-05 21:47:34 +0000438
439<p>The format of the TransformImage method is:</p>
440
441<pre class="code">
442 MagickBooleanType TransformImages(Image **image,
443 const char *crop_geometry,const char *image_geometry)
444</pre>
445
cristy7a40ba82011-01-08 20:31:18 +0000446<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000447
448<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000449<p>the image The transformed image is returned as this parameter.</p>
cristy3ed852e2009-09-05 21:47:34 +0000450
451<h5>crop_geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000452<p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
cristy3ed852e2009-09-05 21:47:34 +0000453
454<h5>image_geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000455<p>An image geometry string. This geometry defines the final size of the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000456
457 </div>
cristy7a40ba82011-01-08 20:31:18 +0000458<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
459_8c.html" id="TransposeImage">TransposeImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000460<div class="doc-section">
461
cristy7a40ba82011-01-08 20:31:18 +0000462<p>TransposeImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis while rotating them by 90 degrees.</p>
cristy3ed852e2009-09-05 21:47:34 +0000463
464<p>The format of the TransposeImage method is:</p>
465
466<pre class="code">
467 Image *TransposeImage(const Image *image,ExceptionInfo *exception)
468</pre>
469
cristy7a40ba82011-01-08 20:31:18 +0000470<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000471
472<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000473<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000474
475<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000476<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000477
478 </div>
cristy7a40ba82011-01-08 20:31:18 +0000479<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
480_8c.html" id="TransverseImage">TransverseImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000481<div class="doc-section">
482
cristy7a40ba82011-01-08 20:31:18 +0000483<p>TransverseImage() creates a vertical mirror image by reflecting the pixels around the central x-axis while rotating them by 270 degrees.</p>
cristy3ed852e2009-09-05 21:47:34 +0000484
485<p>The format of the TransverseImage method is:</p>
486
487<pre class="code">
488 Image *TransverseImage(const Image *image,ExceptionInfo *exception)
489</pre>
490
cristy7a40ba82011-01-08 20:31:18 +0000491<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000492
493<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000494<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000495
496<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000497<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000498
499 </div>
cristy7a40ba82011-01-08 20:31:18 +0000500<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
501_8c.html" id="TrimImage">TrimImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000502<div class="doc-section">
503
cristy7a40ba82011-01-08 20:31:18 +0000504<p>TrimImage() trims pixels from the image edges. It allocates the memory necessary for the new Image structure and returns a pointer to the new image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000505
506<p>The format of the TrimImage method is:</p>
507
508<pre class="code">
509 Image *TrimImage(const Image *image,ExceptionInfo *exception)
510</pre>
511
cristy7a40ba82011-01-08 20:31:18 +0000512<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000513
514<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000515<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000516
517<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000518<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000519
520 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000521
522</div>
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