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199
200<div class="main">
201
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]202<h1>Module transform Methods</h1>
cristy8e6cb722011-03-28 19:17:44 +0000[diff] [blame]203<p class="navigation-index">[<a href="#ChopImage">ChopImage</a> &bull; <a href="#CropImage">CropImage</a> &bull; <a href="#CropImageToTiles">CropImageToTiles</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="#to CropImageToTiles">to CropImageToTiles</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]204
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]205<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ChopImage">ChopImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]206<div class="doc-section">
207
208<p>ChopImage() removes a region of an image and collapses the image to occupy the removed portion.</p>
209
210<p>The format of the ChopImage method is:</p>
211
212<pre class="code">
213 Image *ChopImage(const Image *image,const RectangleInfo *chop_info)
214 ExceptionInfo *exception)
215</pre>
216
217<p>A description of each parameter follows:</p>
218
219<h5>image</h5>
220<p>the image.</p>
221
222<h5>chop_info</h5>
223<p>Define the region of the image to chop.</p>
224
225<h5>exception</h5>
226<p>return any errors or warnings in this structure.</p>
227
228 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]229<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="CropImage">CropImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]230<div class="doc-section">
231
cristy8e6cb722011-03-28 19:17:44 +0000[diff] [blame]232<p>CropImage() extracts a region of the image starting at the offset defined by geometry. Region must be fully defined, and no special handling of geometry flags is performed.</p>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]233
234<p>The format of the CropImage method is:</p>
235
236<pre class="code">
237 Image *CropImage(const Image *image,const RectangleInfo *geometry,
238 ExceptionInfo *exception)
239</pre>
240
241<p>A description of each parameter follows:</p>
242
243<h5>image</h5>
244<p>the image.</p>
245
246<h5>geometry</h5>
247<p>Define the region of the image to crop with members x, y, width, and height.</p>
248
249<h5>exception</h5>
250<p>return any errors or warnings in this structure.</p>
251
252 </div>
cristy8e6cb722011-03-28 19:17:44 +0000[diff] [blame]253<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="CropImageToTiles">CropImageToTiles</a></h2>
254<div class="doc-section">
255
256<p>CropImageToTiles() will crop a single image, into a posible list of tiles. This may include a single sub-region of the image. This basically applies all the normal geometry flags for Crop.</p>
257
258<p>Image *CropImageToTiles(const Image *image,const RectangleInfo *crop_geometry, ExceptionInfo *exception)</p>
259
260<p>A description of each parameter follows:</p>
261
262<h5>image</h5>
263<p>the image The transformed image is returned as this parameter.</p>
264
265<h5>crop_geometry</h5>
266<p>A crop geometry string.</p>
267
268<h5>exception</h5>
269<p>return any errors or warnings in this structure.</p>
270
271 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]272<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ExcerptImage">ExcerptImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]273<div class="doc-section">
274
275<p>ExcerptImage() returns a excerpt of the image as defined by the geometry.</p>
276
277<p>The format of the ExcerptImage method is:</p>
278
279<pre class="code">
280 Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
281 ExceptionInfo *exception)
282</pre>
283
284<p>A description of each parameter follows:</p>
285
286<h5>image</h5>
287<p>the image.</p>
288
289<h5>geometry</h5>
290<p>Define the region of the image to extend with members x, y, width, and height.</p>
291
292<h5>exception</h5>
293<p>return any errors or warnings in this structure.</p>
294
295 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]296<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ExtentImage">ExtentImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]297<div class="doc-section">
298
299<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>
300
301<p>The format of the ExtentImage method is:</p>
302
303<pre class="code">
304 Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
305 ExceptionInfo *exception)
306</pre>
307
308<p>A description of each parameter follows:</p>
309
310<h5>image</h5>
311<p>the image.</p>
312
313<h5>geometry</h5>
314<p>Define the region of the image to extend with members x, y, width, and height.</p>
315
316<h5>exception</h5>
317<p>return any errors or warnings in this structure.</p>
318
319 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]320<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="FlipImage">FlipImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]321<div class="doc-section">
322
323<p>FlipImage() creates a vertical mirror image by reflecting the pixels around the central x-axis.</p>
324
325<p>The format of the FlipImage method is:</p>
326
327<pre class="code">
328 Image *FlipImage(const Image *image,ExceptionInfo *exception)
329</pre>
330
331<p>A description of each parameter follows:</p>
332
333<h5>image</h5>
334<p>the image.</p>
335
336<h5>exception</h5>
337<p>return any errors or warnings in this structure.</p>
338
339 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]340<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="FlopImage">FlopImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]341<div class="doc-section">
342
343<p>FlopImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis.</p>
344
345<p>The format of the FlopImage method is:</p>
346
347<pre class="code">
348 Image *FlopImage(const Image *image,ExceptionInfo *exception)
349</pre>
350
351<p>A description of each parameter follows:</p>
352
353<h5>image</h5>
354<p>the image.</p>
355
356<h5>exception</h5>
357<p>return any errors or warnings in this structure.</p>
358
359 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]360<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="RollImage">RollImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]361<div class="doc-section">
362
363<p>RollImage() offsets an image as defined by x_offset and y_offset.</p>
364
365<p>The format of the RollImage method is:</p>
366
367<pre class="code">
368 Image *RollImage(const Image *image,const ssize_t x_offset,
369 const ssize_t y_offset,ExceptionInfo *exception)
370</pre>
371
372<p>A description of each parameter follows:</p>
373
374<h5>image</h5>
375<p>the image.</p>
376
377<h5>x_offset</h5>
378<p>the number of columns to roll in the horizontal direction.</p>
379
380<h5>y_offset</h5>
381<p>the number of rows to roll in the vertical direction.</p>
382
383<h5>exception</h5>
384<p>return any errors or warnings in this structure.</p>
385
386 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]387<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ShaveImage">ShaveImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]388<div class="doc-section">
389
390<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>
391
392<p>The format of the ShaveImage method is:</p>
393
394<pre class="code">
395 Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
396 ExceptionInfo *exception)
397</pre>
398
399<p>A description of each parameter follows:</p>
400
401<h5>shave_image</h5>
402<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>
403
404<h5>image</h5>
405<p>the image.</p>
406
407<h5>shave_info</h5>
408<p>Specifies a pointer to a RectangleInfo which defines the region of the image to crop.</p>
409
410<h5>exception</h5>
411<p>return any errors or warnings in this structure.</p>
412
413 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]414<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="SpliceImage">SpliceImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]415<div class="doc-section">
416
417<p>SpliceImage() splices a solid color into the image as defined by the geometry.</p>
418
419<p>The format of the SpliceImage method is:</p>
420
421<pre class="code">
422 Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
423 ExceptionInfo *exception)
424</pre>
425
426<p>A description of each parameter follows:</p>
427
428<h5>image</h5>
429<p>the image.</p>
430
431<h5>geometry</h5>
432<p>Define the region of the image to splice with members x, y, width, and height.</p>
433
434<h5>exception</h5>
435<p>return any errors or warnings in this structure.</p>
436
437 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]438<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransformImage">TransformImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]439<div class="doc-section">
440
cristy8e6cb722011-03-28 19:17:44 +0000[diff] [blame]441<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 left as is.</p>
442
443<p>This should only be used for single images.</p>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]444
445<p>The format of the TransformImage method is:</p>
446
447<pre class="code">
448 MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
449 const char *image_geometry)
450</pre>
451
452<p>A description of each parameter follows:</p>
453
454<h5>image</h5>
455<p>the image The transformed image is returned as this parameter.</p>
456
457<h5>crop_geometry</h5>
458<p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
459
460<h5>image_geometry</h5>
461<p>An image geometry string. This geometry defines the final size of the image.</p>
462
463 </div>
cristy8e6cb722011-03-28 19:17:44 +0000[diff] [blame]464<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="to_CropImageToTiles">to CropImageToTiles</a></h2>
465<div class="doc-section">
466
467<p>to CropImageToTiles() or ResizeImage(), as appropriate.</p>
468
469 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]470<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransformImages">TransformImages</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]471<div class="doc-section">
472
473<p>TransformImages() calls TransformImage() on each image of a sequence.</p>
474
475<p>The format of the TransformImage method is:</p>
476
477<pre class="code">
478 MagickBooleanType TransformImages(Image **image,
479 const char *crop_geometry,const char *image_geometry)
480</pre>
481
482<p>A description of each parameter follows:</p>
483
484<h5>image</h5>
485<p>the image The transformed image is returned as this parameter.</p>
486
487<h5>crop_geometry</h5>
488<p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
489
490<h5>image_geometry</h5>
491<p>An image geometry string. This geometry defines the final size of the image.</p>
492
493 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]494<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransposeImage">TransposeImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]495<div class="doc-section">
496
497<p>TransposeImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis while rotating them by 90 degrees.</p>
498
499<p>The format of the TransposeImage method is:</p>
500
501<pre class="code">
502 Image *TransposeImage(const Image *image,ExceptionInfo *exception)
503</pre>
504
505<p>A description of each parameter follows:</p>
506
507<h5>image</h5>
508<p>the image.</p>
509
510<h5>exception</h5>
511<p>return any errors or warnings in this structure.</p>
512
513 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]514<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransverseImage">TransverseImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]515<div class="doc-section">
516
517<p>TransverseImage() creates a vertical mirror image by reflecting the pixels around the central x-axis while rotating them by 270 degrees.</p>
518
519<p>The format of the TransverseImage method is:</p>
520
521<pre class="code">
522 Image *TransverseImage(const Image *image,ExceptionInfo *exception)
523</pre>
524
525<p>A description of each parameter follows:</p>
526
527<h5>image</h5>
528<p>the image.</p>
529
530<h5>exception</h5>
531<p>return any errors or warnings in this structure.</p>
532
533 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]534<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TrimImage">TrimImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]535<div class="doc-section">
536
537<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>
538
539<p>The format of the TrimImage method is:</p>
540
541<pre class="code">
542 Image *TrimImage(const Image *image,ExceptionInfo *exception)
543</pre>
544
545<p>A description of each parameter follows:</p>
546
547<h5>image</h5>
548<p>the image.</p>
549
550<h5>exception</h5>
551<p>return any errors or warnings in this structure.</p>
552
553 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]554
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