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cristy307ba182010-12-25 01:00:34 +0000189<h1>Module transform
190 Methods</h1>
cristyf1196bb2010-02-13 21:18:03 +0000191<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 +0000192
cristy7a40ba82011-01-08 20:31:18 +0000193<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
194_8c.html" id="ChopImage">ChopImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000195<div class="doc-section">
196
cristy7a40ba82011-01-08 20:31:18 +0000197<p>ChopImage() removes a region of an image and collapses the image to occupy the removed portion.</p>
cristy3ed852e2009-09-05 21:47:34 +0000198
199<p>The format of the ChopImage method is:</p>
200
201<pre class="code">
202 Image *ChopImage(const Image *image,const RectangleInfo *chop_info)
203 ExceptionInfo *exception)
204</pre>
205
cristy7a40ba82011-01-08 20:31:18 +0000206<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000207
208<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000209<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000210
211<h5>chop_info</h5>
cristy7a40ba82011-01-08 20:31:18 +0000212<p>Define the region of the image to chop.</p>
cristy3ed852e2009-09-05 21:47:34 +0000213
214<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000215<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000216
217 </div>
cristy7a40ba82011-01-08 20:31:18 +0000218<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
219_8c.html" id="CropImage">CropImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000220<div class="doc-section">
221
cristy7a40ba82011-01-08 20:31:18 +0000222<p>CropImage() extracts a region of the image starting at the offset defined by geometry.</p>
cristy3ed852e2009-09-05 21:47:34 +0000223
224<p>The format of the CropImage method is:</p>
225
226<pre class="code">
227 Image *CropImage(const Image *image,const RectangleInfo *geometry,
228 ExceptionInfo *exception)
229</pre>
230
cristy7a40ba82011-01-08 20:31:18 +0000231<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000232
233<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000234<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000235
236<h5>geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000237<p>Define the region of the image to crop with members x, y, width, and height.</p>
cristy3ed852e2009-09-05 21:47:34 +0000238
239<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000240<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000241
242 </div>
cristy7a40ba82011-01-08 20:31:18 +0000243<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
244_8c.html" id="ExcerptImage">ExcerptImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000245<div class="doc-section">
246
cristy7a40ba82011-01-08 20:31:18 +0000247<p>ExcerptImage() returns a excerpt of the image as defined by the geometry.</p>
cristy3ed852e2009-09-05 21:47:34 +0000248
249<p>The format of the ExcerptImage method is:</p>
250
251<pre class="code">
252 Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
253 ExceptionInfo *exception)
254</pre>
255
cristy7a40ba82011-01-08 20:31:18 +0000256<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000257
258<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000259<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000260
261<h5>geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000262<p>Define the region of the image to extend with members x, y, width, and height.</p>
cristy3ed852e2009-09-05 21:47:34 +0000263
264<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000265<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000266
267 </div>
cristy7a40ba82011-01-08 20:31:18 +0000268<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
269_8c.html" id="ExtentImage">ExtentImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000270<div class="doc-section">
271
cristy7a40ba82011-01-08 20:31:18 +0000272<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 +0000273
274<p>The format of the ExtentImage method is:</p>
275
276<pre class="code">
277 Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
278 ExceptionInfo *exception)
279</pre>
280
cristy7a40ba82011-01-08 20:31:18 +0000281<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000282
283<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000284<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000285
286<h5>geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000287<p>Define the region of the image to extend with members x, y, width, and height.</p>
cristy3ed852e2009-09-05 21:47:34 +0000288
289<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000290<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000291
292 </div>
cristy7a40ba82011-01-08 20:31:18 +0000293<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
294_8c.html" id="FlipImage">FlipImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000295<div class="doc-section">
296
cristy7a40ba82011-01-08 20:31:18 +0000297<p>FlipImage() creates a vertical mirror image by reflecting the pixels around the central x-axis.</p>
cristy3ed852e2009-09-05 21:47:34 +0000298
299<p>The format of the FlipImage method is:</p>
300
301<pre class="code">
302 Image *FlipImage(const Image *image,ExceptionInfo *exception)
303</pre>
304
cristy7a40ba82011-01-08 20:31:18 +0000305<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000306
307<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000308<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000309
310<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000311<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000312
313 </div>
cristy7a40ba82011-01-08 20:31:18 +0000314<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
315_8c.html" id="FlopImage">FlopImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000316<div class="doc-section">
317
cristy7a40ba82011-01-08 20:31:18 +0000318<p>FlopImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis.</p>
cristy3ed852e2009-09-05 21:47:34 +0000319
320<p>The format of the FlopImage method is:</p>
321
322<pre class="code">
323 Image *FlopImage(const Image *image,ExceptionInfo *exception)
324</pre>
325
cristy7a40ba82011-01-08 20:31:18 +0000326<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000327
328<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000329<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000330
331<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000332<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000333
334 </div>
cristy7a40ba82011-01-08 20:31:18 +0000335<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
336_8c.html" id="RollImage">RollImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000337<div class="doc-section">
338
cristy7a40ba82011-01-08 20:31:18 +0000339<p>RollImage() offsets an image as defined by x_offset and y_offset.</p>
cristy3ed852e2009-09-05 21:47:34 +0000340
341<p>The format of the RollImage method is:</p>
342
343<pre class="code">
cristybb503372010-05-27 20:51:26 +0000344 Image *RollImage(const Image *image,const ssize_t x_offset,
345 const ssize_t y_offset,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000346</pre>
347
cristy7a40ba82011-01-08 20:31:18 +0000348<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000349
350<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000351<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000352
353<h5>x_offset</h5>
cristy7a40ba82011-01-08 20:31:18 +0000354<p>the number of columns to roll in the horizontal direction.</p>
cristy3ed852e2009-09-05 21:47:34 +0000355
356<h5>y_offset</h5>
cristy7a40ba82011-01-08 20:31:18 +0000357<p>the number of rows to roll in the vertical direction.</p>
cristy3ed852e2009-09-05 21:47:34 +0000358
359<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000360<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000361
362 </div>
cristy7a40ba82011-01-08 20:31:18 +0000363<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
364_8c.html" id="ShaveImage">ShaveImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000365<div class="doc-section">
366
cristy7a40ba82011-01-08 20:31:18 +0000367<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 +0000368
369<p>The format of the ShaveImage method is:</p>
370
371<pre class="code">
372 Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
373 ExceptionInfo *exception)
374</pre>
375
cristy7a40ba82011-01-08 20:31:18 +0000376<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000377
378<h5>shave_image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000379<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 +0000380
381<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000382<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000383
384<h5>shave_info</h5>
cristy7a40ba82011-01-08 20:31:18 +0000385<p>Specifies a pointer to a RectangleInfo which defines the region of the image to crop.</p>
cristy3ed852e2009-09-05 21:47:34 +0000386
387<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000388<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000389
390 </div>
cristy7a40ba82011-01-08 20:31:18 +0000391<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
392_8c.html" id="SpliceImage">SpliceImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000393<div class="doc-section">
394
cristy7a40ba82011-01-08 20:31:18 +0000395<p>SpliceImage() splices a solid color into the image as defined by the geometry.</p>
cristy3ed852e2009-09-05 21:47:34 +0000396
397<p>The format of the SpliceImage method is:</p>
398
399<pre class="code">
400 Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
401 ExceptionInfo *exception)
402</pre>
403
cristy7a40ba82011-01-08 20:31:18 +0000404<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000405
406<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000407<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000408
409<h5>geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000410<p>Define the region of the image to splice with members x, y, width, and height.</p>
cristy3ed852e2009-09-05 21:47:34 +0000411
412<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000413<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000414
415 </div>
cristy7a40ba82011-01-08 20:31:18 +0000416<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
417_8c.html" id="TransformImage">TransformImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000418<div class="doc-section">
419
cristy7a40ba82011-01-08 20:31:18 +0000420<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 +0000421
422<p>The format of the TransformImage method is:</p>
423
424<pre class="code">
425 MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
426 const char *image_geometry)
427</pre>
428
cristy7a40ba82011-01-08 20:31:18 +0000429<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000430
431<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000432<p>the image The transformed image is returned as this parameter.</p>
cristy3ed852e2009-09-05 21:47:34 +0000433
434<h5>crop_geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000435<p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
cristy3ed852e2009-09-05 21:47:34 +0000436
437<h5>image_geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000438<p>An image geometry string. This geometry defines the final size of the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000439
440 </div>
cristy7a40ba82011-01-08 20:31:18 +0000441<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
442_8c.html" id="TransformImages">TransformImages</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000443<div class="doc-section">
444
cristy7a40ba82011-01-08 20:31:18 +0000445<p>TransformImages() calls TransformImage() on each image of a sequence.</p>
cristy3ed852e2009-09-05 21:47:34 +0000446
447<p>The format of the TransformImage method is:</p>
448
449<pre class="code">
450 MagickBooleanType TransformImages(Image **image,
451 const char *crop_geometry,const char *image_geometry)
452</pre>
453
cristy7a40ba82011-01-08 20:31:18 +0000454<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000455
456<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000457<p>the image The transformed image is returned as this parameter.</p>
cristy3ed852e2009-09-05 21:47:34 +0000458
459<h5>crop_geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000460<p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
cristy3ed852e2009-09-05 21:47:34 +0000461
462<h5>image_geometry</h5>
cristy7a40ba82011-01-08 20:31:18 +0000463<p>An image geometry string. This geometry defines the final size of the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000464
465 </div>
cristy7a40ba82011-01-08 20:31:18 +0000466<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
467_8c.html" id="TransposeImage">TransposeImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000468<div class="doc-section">
469
cristy7a40ba82011-01-08 20:31:18 +0000470<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 +0000471
472<p>The format of the TransposeImage method is:</p>
473
474<pre class="code">
475 Image *TransposeImage(const Image *image,ExceptionInfo *exception)
476</pre>
477
cristy7a40ba82011-01-08 20:31:18 +0000478<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000479
480<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000481<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000482
483<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000484<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000485
486 </div>
cristy7a40ba82011-01-08 20:31:18 +0000487<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
488_8c.html" id="TransverseImage">TransverseImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000489<div class="doc-section">
490
cristy7a40ba82011-01-08 20:31:18 +0000491<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 +0000492
493<p>The format of the TransverseImage method is:</p>
494
495<pre class="code">
496 Image *TransverseImage(const Image *image,ExceptionInfo *exception)
497</pre>
498
cristy7a40ba82011-01-08 20:31:18 +0000499<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000500
501<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000502<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000503
504<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000505<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000506
507 </div>
cristy7a40ba82011-01-08 20:31:18 +0000508<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/transform
509_8c.html" id="TrimImage">TrimImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000510<div class="doc-section">
511
cristy7a40ba82011-01-08 20:31:18 +0000512<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 +0000513
514<p>The format of the TrimImage method is:</p>
515
516<pre class="code">
517 Image *TrimImage(const Image *image,ExceptionInfo *exception)
518</pre>
519
cristy7a40ba82011-01-08 20:31:18 +0000520<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000521
522<h5>image</h5>
cristy7a40ba82011-01-08 20:31:18 +0000523<p>the image.</p>
cristy3ed852e2009-09-05 21:47:34 +0000524
525<h5>exception</h5>
cristy7a40ba82011-01-08 20:31:18 +0000526<p>return any errors or warnings in this structure.</p>
cristy3ed852e2009-09-05 21:47:34 +0000527
528 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000529
530</div>
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