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167
168<div class="main">
169
cristyf1196bb2010-02-13 21:18:03 +0000[diff] [blame]170<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 +0000[diff] [blame]171
172<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
cristyf1196bb2010-02-13 21:18:03 +0000[diff] [blame]173_8c.html" target="source" name="ChopImage">ChopImage</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]174<div class="doc-section">
175
cristyf1196bb2010-02-13 21:18:03 +0000[diff] [blame]176<p>ChopImage() removes a region of an image and collapses the image to occupy the removed portion.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]177
178<p>The format of the ChopImage method is:</p>
179
180<pre class="code">
181 Image *ChopImage(const Image *image,const RectangleInfo *chop_info)
182 ExceptionInfo *exception)
183</pre>
184
185<p>A description of each parameter follows:</p></ol>
186
187<h5>image</h5>
188<ol><p>the image.</p></ol>
189
190<h5>chop_info</h5>
191<ol><p>Define the region of the image to chop.</p></ol>
192
193<h5>exception</h5>
194<ol><p>return any errors or warnings in this structure.</p></ol>
195
196 </div>
197<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
198_8c.html" target="source" name="CropImage">CropImage</a></h2>
199<div class="doc-section">
200
201<p>CropImage() extracts a region of the image starting at the offset defined by geometry.</p></ol>
202
203<p>The format of the CropImage method is:</p>
204
205<pre class="code">
206 Image *CropImage(const Image *image,const RectangleInfo *geometry,
207 ExceptionInfo *exception)
208</pre>
209
210<p>A description of each parameter follows:</p></ol>
211
212<h5>image</h5>
213<ol><p>the image.</p></ol>
214
215<h5>geometry</h5>
216<ol><p>Define the region of the image to crop with members x, y, width, and height.</p></ol>
217
218<h5>exception</h5>
219<ol><p>return any errors or warnings in this structure.</p></ol>
220
221 </div>
222<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
223_8c.html" target="source" name="ExcerptImage">ExcerptImage</a></h2>
224<div class="doc-section">
225
226<p>ExcerptImage() returns a excerpt of the image as defined by the geometry.</p></ol>
227
228<p>The format of the ExcerptImage method is:</p>
229
230<pre class="code">
231 Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
232 ExceptionInfo *exception)
233</pre>
234
235<p>A description of each parameter follows:</p></ol>
236
237<h5>image</h5>
238<ol><p>the image.</p></ol>
239
240<h5>geometry</h5>
241<ol><p>Define the region of the image to extend with members x, y, width, and height.</p></ol>
242
243<h5>exception</h5>
244<ol><p>return any errors or warnings in this structure.</p></ol>
245
246 </div>
247<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
248_8c.html" target="source" name="ExtentImage">ExtentImage</a></h2>
249<div class="doc-section">
250
251<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></ol>
252
253<p>The format of the ExtentImage method is:</p>
254
255<pre class="code">
256 Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
257 ExceptionInfo *exception)
258</pre>
259
260<p>A description of each parameter follows:</p></ol>
261
262<h5>image</h5>
263<ol><p>the image.</p></ol>
264
265<h5>geometry</h5>
266<ol><p>Define the region of the image to extend with members x, y, width, and height.</p></ol>
267
268<h5>exception</h5>
269<ol><p>return any errors or warnings in this structure.</p></ol>
270
271 </div>
272<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
273_8c.html" target="source" name="FlipImage">FlipImage</a></h2>
274<div class="doc-section">
275
276<p>FlipImage() creates a vertical mirror image by reflecting the pixels around the central x-axis.</p></ol>
277
278<p>The format of the FlipImage method is:</p>
279
280<pre class="code">
281 Image *FlipImage(const Image *image,ExceptionInfo *exception)
282</pre>
283
284<p>A description of each parameter follows:</p></ol>
285
286<h5>image</h5>
287<ol><p>the image.</p></ol>
288
289<h5>exception</h5>
290<ol><p>return any errors or warnings in this structure.</p></ol>
291
292 </div>
293<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
294_8c.html" target="source" name="FlopImage">FlopImage</a></h2>
295<div class="doc-section">
296
297<p>FlopImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis.</p></ol>
298
299<p>The format of the FlopImage method is:</p>
300
301<pre class="code">
302 Image *FlopImage(const Image *image,ExceptionInfo *exception)
303</pre>
304
305<p>A description of each parameter follows:</p></ol>
306
307<h5>image</h5>
308<ol><p>the image.</p></ol>
309
310<h5>exception</h5>
311<ol><p>return any errors or warnings in this structure.</p></ol>
312
313 </div>
314<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
315_8c.html" target="source" name="RollImage">RollImage</a></h2>
316<div class="doc-section">
317
318<p>RollImage() offsets an image as defined by x_offset and y_offset.</p></ol>
319
320<p>The format of the RollImage method is:</p>
321
322<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]323 Image *RollImage(const Image *image,const ssize_t x_offset,
324 const ssize_t y_offset,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]325</pre>
326
327<p>A description of each parameter follows:</p></ol>
328
329<h5>image</h5>
330<ol><p>the image.</p></ol>
331
332<h5>x_offset</h5>
333<ol><p>the number of columns to roll in the horizontal direction.</p></ol>
334
335<h5>y_offset</h5>
336<ol><p>the number of rows to roll in the vertical direction.</p></ol>
337
338<h5>exception</h5>
339<ol><p>return any errors or warnings in this structure.</p></ol>
340
341 </div>
342<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
343_8c.html" target="source" name="ShaveImage">ShaveImage</a></h2>
344<div class="doc-section">
345
346<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></ol>
347
348<p>The format of the ShaveImage method is:</p>
349
350<pre class="code">
351 Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
352 ExceptionInfo *exception)
353</pre>
354
355<p>A description of each parameter follows:</p></ol>
356
357<h5>shave_image</h5>
358<ol><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></ol>
359
360<h5>image</h5>
361<ol><p>the image.</p></ol>
362
363<h5>shave_info</h5>
364<ol><p>Specifies a pointer to a RectangleInfo which defines the region of the image to crop.</p></ol>
365
366<h5>exception</h5>
367<ol><p>return any errors or warnings in this structure.</p></ol>
368
369 </div>
370<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
371_8c.html" target="source" name="SpliceImage">SpliceImage</a></h2>
372<div class="doc-section">
373
374<p>SpliceImage() splices a solid color into the image as defined by the geometry.</p></ol>
375
376<p>The format of the SpliceImage method is:</p>
377
378<pre class="code">
379 Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
380 ExceptionInfo *exception)
381</pre>
382
383<p>A description of each parameter follows:</p></ol>
384
385<h5>image</h5>
386<ol><p>the image.</p></ol>
387
388<h5>geometry</h5>
389<ol><p>Define the region of the image to splice with members x, y, width, and height.</p></ol>
390
391<h5>exception</h5>
392<ol><p>return any errors or warnings in this structure.</p></ol>
393
394 </div>
395<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
396_8c.html" target="source" name="TransformImage">TransformImage</a></h2>
397<div class="doc-section">
398
399<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></ol>
400
401<p>The format of the TransformImage method is:</p>
402
403<pre class="code">
404 MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
405 const char *image_geometry)
406</pre>
407
408<p>A description of each parameter follows:</p></ol>
409
410<h5>image</h5>
411<ol><p>the image The transformed image is returned as this parameter.</p></ol>
412
413<h5>crop_geometry</h5>
414<ol><p>A crop geometry string. This geometry defines a subregion of the image to crop.</p></ol>
415
416<h5>image_geometry</h5>
417<ol><p>An image geometry string. This geometry defines the final size of the image.</p></ol>
418
419 </div>
420<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
421_8c.html" target="source" name="TransformImages">TransformImages</a></h2>
422<div class="doc-section">
423
424<p>TransformImages() calls TransformImage() on each image of a sequence.</p></ol>
425
426<p>The format of the TransformImage method is:</p>
427
428<pre class="code">
429 MagickBooleanType TransformImages(Image **image,
430 const char *crop_geometry,const char *image_geometry)
431</pre>
432
433<p>A description of each parameter follows:</p></ol>
434
435<h5>image</h5>
436<ol><p>the image The transformed image is returned as this parameter.</p></ol>
437
438<h5>crop_geometry</h5>
439<ol><p>A crop geometry string. This geometry defines a subregion of the image to crop.</p></ol>
440
441<h5>image_geometry</h5>
442<ol><p>An image geometry string. This geometry defines the final size of the image.</p></ol>
443
444 </div>
445<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
446_8c.html" target="source" name="TransposeImage">TransposeImage</a></h2>
447<div class="doc-section">
448
449<p>TransposeImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis while rotating them by 90 degrees.</p></ol>
450
451<p>The format of the TransposeImage method is:</p>
452
453<pre class="code">
454 Image *TransposeImage(const Image *image,ExceptionInfo *exception)
455</pre>
456
457<p>A description of each parameter follows:</p></ol>
458
459<h5>image</h5>
460<ol><p>the image.</p></ol>
461
462<h5>exception</h5>
463<ol><p>return any errors or warnings in this structure.</p></ol>
464
465 </div>
466<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
467_8c.html" target="source" name="TransverseImage">TransverseImage</a></h2>
468<div class="doc-section">
469
470<p>TransverseImage() creates a vertical mirror image by reflecting the pixels around the central x-axis while rotating them by 270 degrees.</p></ol>
471
472<p>The format of the TransverseImage method is:</p>
473
474<pre class="code">
475 Image *TransverseImage(const Image *image,ExceptionInfo *exception)
476</pre>
477
478<p>A description of each parameter follows:</p></ol>
479
480<h5>image</h5>
481<ol><p>the image.</p></ol>
482
483<h5>exception</h5>
484<ol><p>return any errors or warnings in this structure.</p></ol>
485
486 </div>
487<h2><a href="http://www.imagemagick.org/api/MagickCore/transform
488_8c.html" target="source" name="TrimImage">TrimImage</a></h2>
489<div class="doc-section">
490
491<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></ol>
492
493<p>The format of the TrimImage method is:</p>
494
495<pre class="code">
496 Image *TrimImage(const Image *image,ExceptionInfo *exception)
497</pre>
498
499<p>A description of each parameter follows:</p></ol>
500
501<h5>image</h5>
502<ol><p>the image.</p></ol>
503
504<h5>exception</h5>
505<ol><p>return any errors or warnings in this structure.</p></ol>
506
507 </div>
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