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241<div class="main">
242
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]243<h1>Module transform Methods</h1>
244<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>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]245
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]246<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ChopImage">ChopImage</a></h2>
247<div class="doc-section">
248
249<p>ChopImage() removes a region of an image and collapses the image to occupy the removed portion.</p>
250
251<p>The format of the ChopImage method is:</p>
252
253<pre class="code">
254 Image *ChopImage(const Image *image,const RectangleInfo *chop_info)
255 ExceptionInfo *exception)
256</pre>
257
258<p>A description of each parameter follows:</p>
259
260<h5>image</h5>
261<p>the image.</p>
262
263<h5>chop_info</h5>
264<p>Define the region of the image to chop.</p>
265
266<h5>exception</h5>
267<p>return any errors or warnings in this structure.</p>
268
269 </div>
270<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="CropImage">CropImage</a></h2>
271<div class="doc-section">
272
273<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>
274
275<p>The format of the CropImage method is:</p>
276
277<pre class="code">
278 Image *CropImage(const Image *image,const RectangleInfo *geometry,
279 ExceptionInfo *exception)
280</pre>
281
282<p>A description of each parameter follows:</p>
283
284<h5>image</h5>
285<p>the image.</p>
286
287<h5>geometry</h5>
288<p>Define the region of the image to crop with members x, y, width, and height.</p>
289
290<h5>exception</h5>
291<p>return any errors or warnings in this structure.</p>
292
293 </div>
294<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="CropImageToTiles">CropImageToTiles</a></h2>
295<div class="doc-section">
296
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame^]297<p>CropImageToTiles() crops a single image, into a possible list of tiles. This may include a single sub-region of the image. This basically applies all the normal geometry flags for Crop.</p>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]298
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame^]299<p>Image *CropImageToTiles(const Image *image, const RectangleInfo *crop_geometry, ExceptionInfo *exception)</p>
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]300
301<p>A description of each parameter follows:</p>
302
303<h5>image</h5>
304<p>the image The transformed image is returned as this parameter.</p>
305
306<h5>crop_geometry</h5>
307<p>A crop geometry string.</p>
308
309<h5>exception</h5>
310<p>return any errors or warnings in this structure.</p>
311
312 </div>
313<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ExcerptImage">ExcerptImage</a></h2>
314<div class="doc-section">
315
316<p>ExcerptImage() returns a excerpt of the image as defined by the geometry.</p>
317
318<p>The format of the ExcerptImage method is:</p>
319
320<pre class="code">
321 Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
322 ExceptionInfo *exception)
323</pre>
324
325<p>A description of each parameter follows:</p>
326
327<h5>image</h5>
328<p>the image.</p>
329
330<h5>geometry</h5>
331<p>Define the region of the image to extend with members x, y, width, and height.</p>
332
333<h5>exception</h5>
334<p>return any errors or warnings in this structure.</p>
335
336 </div>
337<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ExtentImage">ExtentImage</a></h2>
338<div class="doc-section">
339
340<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>
341
342<p>The format of the ExtentImage method is:</p>
343
344<pre class="code">
345 Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
346 ExceptionInfo *exception)
347</pre>
348
349<p>A description of each parameter follows:</p>
350
351<h5>image</h5>
352<p>the image.</p>
353
354<h5>geometry</h5>
355<p>Define the region of the image to extend with members x, y, width, and height.</p>
356
357<h5>exception</h5>
358<p>return any errors or warnings in this structure.</p>
359
360 </div>
361<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="FlipImage">FlipImage</a></h2>
362<div class="doc-section">
363
364<p>FlipImage() creates a vertical mirror image by reflecting the pixels around the central x-axis.</p>
365
366<p>The format of the FlipImage method is:</p>
367
368<pre class="code">
369 Image *FlipImage(const Image *image,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>exception</h5>
378<p>return any errors or warnings in this structure.</p>
379
380 </div>
381<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="FlopImage">FlopImage</a></h2>
382<div class="doc-section">
383
384<p>FlopImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis.</p>
385
386<p>The format of the FlopImage method is:</p>
387
388<pre class="code">
389 Image *FlopImage(const Image *image,ExceptionInfo *exception)
390</pre>
391
392<p>A description of each parameter follows:</p>
393
394<h5>image</h5>
395<p>the image.</p>
396
397<h5>exception</h5>
398<p>return any errors or warnings in this structure.</p>
399
400 </div>
401<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="RollImage">RollImage</a></h2>
402<div class="doc-section">
403
404<p>RollImage() offsets an image as defined by x_offset and y_offset.</p>
405
406<p>The format of the RollImage method is:</p>
407
408<pre class="code">
409 Image *RollImage(const Image *image,const ssize_t x_offset,
410 const ssize_t y_offset,ExceptionInfo *exception)
411</pre>
412
413<p>A description of each parameter follows:</p>
414
415<h5>image</h5>
416<p>the image.</p>
417
418<h5>x_offset</h5>
419<p>the number of columns to roll in the horizontal direction.</p>
420
421<h5>y_offset</h5>
422<p>the number of rows to roll in the vertical direction.</p>
423
424<h5>exception</h5>
425<p>return any errors or warnings in this structure.</p>
426
427 </div>
428<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ShaveImage">ShaveImage</a></h2>
429<div class="doc-section">
430
431<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>
432
433<p>The format of the ShaveImage method is:</p>
434
435<pre class="code">
436 Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
437 ExceptionInfo *exception)
438</pre>
439
440<p>A description of each parameter follows:</p>
441
442<h5>shave_image</h5>
443<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>
444
445<h5>image</h5>
446<p>the image.</p>
447
448<h5>shave_info</h5>
449<p>Specifies a pointer to a RectangleInfo which defines the region of the image to crop.</p>
450
451<h5>exception</h5>
452<p>return any errors or warnings in this structure.</p>
453
454 </div>
455<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="SpliceImage">SpliceImage</a></h2>
456<div class="doc-section">
457
458<p>SpliceImage() splices a solid color into the image as defined by the geometry.</p>
459
460<p>The format of the SpliceImage method is:</p>
461
462<pre class="code">
463 Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
464 ExceptionInfo *exception)
465</pre>
466
467<p>A description of each parameter follows:</p>
468
469<h5>image</h5>
470<p>the image.</p>
471
472<h5>geometry</h5>
473<p>Define the region of the image to splice with members x, y, width, and height.</p>
474
475<h5>exception</h5>
476<p>return any errors or warnings in this structure.</p>
477
478 </div>
479<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransformImage">TransformImage</a></h2>
480<div class="doc-section">
481
482<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>
483
484<p>This should only be used for single images.</p>
485
486<p>The format of the TransformImage method is:</p>
487
488<pre class="code">
489 MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
490 const char *image_geometry)
491</pre>
492
493<p>A description of each parameter follows:</p>
494
495<h5>image</h5>
496<p>the image The transformed image is returned as this parameter.</p>
497
498<h5>crop_geometry</h5>
499<p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
500
501<h5>image_geometry</h5>
502<p>An image geometry string. This geometry defines the final size of the image.</p>
503
504 </div>
505<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="to_CropImageToTiles">to CropImageToTiles</a></h2>
506<div class="doc-section">
507
508<p>to CropImageToTiles() or ResizeImage(), as appropriate.</p>
509
510 </div>
511<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransformImages">TransformImages</a></h2>
512<div class="doc-section">
513
514<p>TransformImages() calls TransformImage() on each image of a sequence.</p>
515
516<p>The format of the TransformImage method is:</p>
517
518<pre class="code">
519 MagickBooleanType TransformImages(Image **image,
520 const char *crop_geometry,const char *image_geometry)
521</pre>
522
523<p>A description of each parameter follows:</p>
524
525<h5>image</h5>
526<p>the image The transformed image is returned as this parameter.</p>
527
528<h5>crop_geometry</h5>
529<p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
530
531<h5>image_geometry</h5>
532<p>An image geometry string. This geometry defines the final size of the image.</p>
533
534 </div>
535<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransposeImage">TransposeImage</a></h2>
536<div class="doc-section">
537
538<p>TransposeImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis while rotating them by 90 degrees.</p>
539
540<p>The format of the TransposeImage method is:</p>
541
542<pre class="code">
543 Image *TransposeImage(const Image *image,ExceptionInfo *exception)
544</pre>
545
546<p>A description of each parameter follows:</p>
547
548<h5>image</h5>
549<p>the image.</p>
550
551<h5>exception</h5>
552<p>return any errors or warnings in this structure.</p>
553
554 </div>
555<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransverseImage">TransverseImage</a></h2>
556<div class="doc-section">
557
558<p>TransverseImage() creates a vertical mirror image by reflecting the pixels around the central x-axis while rotating them by 270 degrees.</p>
559
560<p>The format of the TransverseImage method is:</p>
561
562<pre class="code">
563 Image *TransverseImage(const Image *image,ExceptionInfo *exception)
564</pre>
565
566<p>A description of each parameter follows:</p>
567
568<h5>image</h5>
569<p>the image.</p>
570
571<h5>exception</h5>
572<p>return any errors or warnings in this structure.</p>
573
574 </div>
575<h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TrimImage">TrimImage</a></h2>
576<div class="doc-section">
577
578<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>
579
580<p>The format of the TrimImage method is:</p>
581
582<pre class="code">
583 Image *TrimImage(const Image *image,ExceptionInfo *exception)
584</pre>
585
586<p>A description of each parameter follows:</p>
587
588<h5>image</h5>
589<p>the image.</p>
590
591<h5>exception</h5>
592<p>return any errors or warnings in this structure.</p>
593
594 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]595
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