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176
cristy307ba182010-12-25 01:00:34 +0000[diff] [blame]177<h1>Module image
178 Methods</h1>
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]179<p class="navigation-index">[<a href="#AcquireImage">AcquireImage</a> &bull; <a href="#AcquireImageInfo">AcquireImageInfo</a> &bull; <a href="#AcquireNextImage">AcquireNextImage</a> &bull; <a href="#AppendImages">AppendImages</a> &bull; <a href="#CatchImageException">CatchImageException</a> &bull; <a href="#ClipImagePath">ClipImagePath</a> &bull; <a href="#CloneImage">CloneImage</a> &bull; <a href="#CloneImageInfo">CloneImageInfo</a> &bull; <a href="#CombineImages">CombineImages</a> &bull; <a href="#DestroyImage">DestroyImage</a> &bull; <a href="#DestroyImageInfo">DestroyImageInfo</a> &bull; <a href="#GetImageAlphaChannel">GetImageAlphaChannel</a> &bull; <a href="#GetImageClipMask">GetImageClipMask</a> &bull; <a href="#GetImageException">GetImageException</a> &bull; <a href="#GetImageInfo">GetImageInfo</a> &bull; <a href="#GetImageInfoFile">GetImageInfoFile</a> &bull; <a href="#GetImageMask">GetImageMask</a> &bull; <a href="#GetImageVirtualPixelMethod">GetImageVirtualPixelMethod</a> &bull; <a href="#InterpretImageFilename">InterpretImageFilename</a> &bull; <a href="#IsHighDynamicRangeImage">IsHighDynamicRangeImage</a> &bull; <a href="#IsImageObject">IsImageObject</a> &bull; <a href="#IsTaintImage">IsTaintImage</a> &bull; <a href="#ModifyImage">ModifyImage</a> &bull; <a href="#NewMagickImage">NewMagickImage</a> &bull; <a href="#ReferenceImage">ReferenceImage</a> &bull; <a href="#ResetImagePage">ResetImagePage</a> &bull; <a href="#SeparateImageChannel">SeparateImageChannel</a> &bull; <a href="#SeparateImages">SeparateImages</a> &bull; <a href="#SetImageAlphaChannel">SetImageAlphaChannel</a> &bull; <a href="#SetImageBackgroundColor">SetImageBackgroundColor</a> &bull; <a href="#SetImageColor">SetImageColor</a> &bull; <a href="#SetImageStorageClass">SetImageStorageClass</a> &bull; <a href="#SetImageClipMask">SetImageClipMask</a> &bull; <a href="#SetImageExtent">SetImageExtent</a> &bull; <a href="#SetImageInfoBlob">SetImageInfoBlob</a> &bull; <a href="#SetImageInfoFile">SetImageInfoFile</a> &bull; <a href="#SetImageMask">SetImageMask</a> &bull; <a href="#SetImageOpacity">SetImageOpacity</a> &bull; <a href="#SetImageType">SetImageType</a> &bull; <a href="#SetImageVirtualPixelMethod">SetImageVirtualPixelMethod</a> &bull; <a href="#StripImage">StripImage</a> &bull; <a href="#SyncImageSettings">SyncImageSettings</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]180
181<h2><a href="http://www.imagemagick.org/api/MagickCore/image
182_8c.html" target="source" name="AcquireImage">AcquireImage</a></h2>
183<div class="doc-section">
184
185<p>AcquireImage() returns a pointer to an image structure initialized to default values.</p></ol>
186
187<p>The format of the AcquireImage method is:</p>
188
189<pre class="code">
190 Image *AcquireImage(const ImageInfo *image_info)
191</pre>
192
193<p>A description of each parameter follows:</p></ol>
194
195<h5>image_info</h5>
196<ol><p>Many of the image default values are set from this structure. For example, filename, compression, depth, background color, and others.</p></ol>
197
198 </div>
199<h2><a href="http://www.imagemagick.org/api/MagickCore/image
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]200_8c.html" target="source" name="AcquireImageInfo">AcquireImageInfo</a></h2>
201<div class="doc-section">
202
203<p>AcquireImageInfo() allocates the ImageInfo structure.</p></ol>
204
205<p>The format of the AcquireImageInfo method is:</p>
206
207<pre class="code">
208 ImageInfo *AcquireImageInfo(void)
209</pre>
210
211 </div>
212<h2><a href="http://www.imagemagick.org/api/MagickCore/image
213_8c.html" target="source" name="AcquireNextImage">AcquireNextImage</a></h2>
214<div class="doc-section">
215
216<p>AcquireNextImage() initializes the next image in a sequence to default values. The next member of image points to the newly allocated image. If there is a memory shortage, next is assigned NULL.</p></ol>
217
218<p>The format of the AcquireNextImage method is:</p>
219
220<pre class="code">
221 void AcquireNextImage(const ImageInfo *image_info,Image *image)
222</pre>
223
224<p>A description of each parameter follows:</p></ol>
225
226<h5>image_info</h5>
227<ol><p>Many of the image default values are set from this structure. For example, filename, compression, depth, background color, and others.</p></ol>
228
229<h5>image</h5>
230<ol><p>the image.</p></ol>
231
232 </div>
233<h2><a href="http://www.imagemagick.org/api/MagickCore/image
234_8c.html" target="source" name="AppendImages">AppendImages</a></h2>
235<div class="doc-section">
236
237<p>AppendImages() takes all images from the current image pointer to the end of the image list and appends them to each other top-to-bottom if the stack parameter is true, otherwise left-to-right.</p></ol>
238
239<p>The current gravity setting now effects how the image is justified in the final image.</p></ol>
240
241<p>The format of the AppendImages method is:</p>
242
243<pre class="code">
244 Image *AppendImages(const Image *image,const MagickBooleanType stack,
245 ExceptionInfo *exception)
246</pre>
247
248<p>A description of each parameter follows:</p></ol>
249
250<h5>image</h5>
251<ol><p>the image sequence.</p></ol>
252
253<h5>stack</h5>
254<ol><p>A value other than 0 stacks the images top-to-bottom.</p></ol>
255
256<h5>exception</h5>
257<ol><p>return any errors or warnings in this structure.</p></ol>
258
259 </div>
260<h2><a href="http://www.imagemagick.org/api/MagickCore/image
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]261_8c.html" target="source" name="CatchImageException">CatchImageException</a></h2>
262<div class="doc-section">
263
264<p>CatchImageException() returns if no exceptions are found in the image sequence, otherwise it determines the most severe exception and reports it as a warning or error depending on the severity.</p></ol>
265
266<p>The format of the CatchImageException method is:</p>
267
268<pre class="code">
269 ExceptionType CatchImageException(Image *image)
270</pre>
271
272<p>A description of each parameter follows:</p></ol>
273
274<h5>image</h5>
275<ol><p>An image sequence.</p></ol>
276
277 </div>
278<h2><a href="http://www.imagemagick.org/api/MagickCore/image
279_8c.html" target="source" name="ClipImagePath">ClipImagePath</a></h2>
280<div class="doc-section">
281
282<p>ClipImagePath() sets the image clip mask based any clipping path information if it exists.</p></ol>
283
284<p>The format of the ClipImagePath method is:</p>
285
286<pre class="code">
287 MagickBooleanType ClipImagePath(Image *image,const char *pathname,
288 const MagickBooleanType inside)
289</pre>
290
291<p>A description of each parameter follows:</p></ol>
292
293<h5>image</h5>
294<ol><p>the image.</p></ol>
295
296<h5>pathname</h5>
297<ol><p>name of clipping path resource. If name is preceded by #, use clipping path numbered by name.</p></ol>
298
299<h5>inside</h5>
300<ol><p>if non-zero, later operations take effect inside clipping path. Otherwise later operations take effect outside clipping path.</p></ol>
301
302 </div>
303<h2><a href="http://www.imagemagick.org/api/MagickCore/image
304_8c.html" target="source" name="CloneImage">CloneImage</a></h2>
305<div class="doc-section">
306
307<p>CloneImage() copies an image and returns the copy as a new image object. If the specified columns and rows is 0, an exact copy of the image is returned, otherwise the pixel data is undefined and must be initialized with the QueueAuthenticPixels() and SyncAuthenticPixels() methods. On failure, a NULL image is returned and exception describes the reason for the failure.</p></ol>
308
309<p>The format of the CloneImage method is:</p>
310
311<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]312 Image *CloneImage(const Image *image,const size_t columns,
313 const size_t rows,const MagickBooleanType orphan,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]314 ExceptionInfo *exception)
315</pre>
316
317<p>A description of each parameter follows:</p></ol>
318
319<h5>image</h5>
320<ol><p>the image.</p></ol>
321
322<h5>columns</h5>
323<ol><p>the number of columns in the cloned image.</p></ol>
324
325<h5>rows</h5>
326<ol><p>the number of rows in the cloned image.</p></ol>
327
328<h5>detach</h5>
329<ol><p>With a value other than 0, the cloned image is detached from its parent I/O stream.</p></ol>
330
331<h5>exception</h5>
332<ol><p>return any errors or warnings in this structure.</p></ol>
333
334 </div>
335<h2><a href="http://www.imagemagick.org/api/MagickCore/image
336_8c.html" target="source" name="CloneImageInfo">CloneImageInfo</a></h2>
337<div class="doc-section">
338
339<p>CloneImageInfo() makes a copy of the given image info structure. If NULL is specified, a new image info structure is created initialized to default values.</p></ol>
340
341<p>The format of the CloneImageInfo method is:</p>
342
343<pre class="code">
344 ImageInfo *CloneImageInfo(const ImageInfo *image_info)
345</pre>
346
347<p>A description of each parameter follows:</p></ol>
348
349<h5>image_info</h5>
350<ol><p>the image info.</p></ol>
351
352 </div>
353<h2><a href="http://www.imagemagick.org/api/MagickCore/image
354_8c.html" target="source" name="CombineImages">CombineImages</a></h2>
355<div class="doc-section">
356
357<p>CombineImages() combines one or more images into a single image. The grayscale value of the pixels of each image in the sequence is assigned in order to the specified channels of the combined image. The typical ordering would be image 1 => Red, 2 => Green, 3 => Blue, etc.</p></ol>
358
359<p>The format of the CombineImages method is:</p>
360
361<pre class="code">
362 Image *CombineImages(const Image *image,const ChannelType channel,
363 ExceptionInfo *exception)
364</pre>
365
366<p>A description of each parameter follows:</p></ol>
367
368<h5>image</h5>
369<ol><p>the image.</p></ol>
370
371<h5>exception</h5>
372<ol><p>return any errors or warnings in this structure.</p></ol>
373
374 </div>
375<h2><a href="http://www.imagemagick.org/api/MagickCore/image
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]376_8c.html" target="source" name="DestroyImage">DestroyImage</a></h2>
377<div class="doc-section">
378
379<p>DestroyImage() dereferences an image, deallocating memory associated with the image if the reference count becomes zero.</p></ol>
380
381<p>The format of the DestroyImage method is:</p>
382
383<pre class="code">
384 Image *DestroyImage(Image *image)
385</pre>
386
387<p>A description of each parameter follows:</p></ol>
388
389<h5>image</h5>
390<ol><p>the image.</p></ol>
391
392 </div>
393<h2><a href="http://www.imagemagick.org/api/MagickCore/image
394_8c.html" target="source" name="DestroyImageInfo">DestroyImageInfo</a></h2>
395<div class="doc-section">
396
397<p>DestroyImageInfo() deallocates memory associated with an ImageInfo structure.</p></ol>
398
399<p>The format of the DestroyImageInfo method is:</p>
400
401<pre class="code">
402 ImageInfo *DestroyImageInfo(ImageInfo *image_info)
403</pre>
404
405<p>A description of each parameter follows:</p></ol>
406
407<h5>image_info</h5>
408<ol><p>the image info.</p></ol>
409
410 </div>
411<h2><a href="http://www.imagemagick.org/api/MagickCore/image
412_8c.html" target="source" name="GetImageAlphaChannel">GetImageAlphaChannel</a></h2>
413<div class="doc-section">
414
415<p>GetImageAlphaChannel() returns MagickFalse if the image alpha channel is not activated. That is, the image is RGB rather than RGBA or CMYK rather than CMYKA.</p></ol>
416
417<p>The format of the GetImageAlphaChannel method is:</p>
418
419<pre class="code">
420 MagickBooleanType GetImageAlphaChannel(const Image *image)
421</pre>
422
423<p>A description of each parameter follows:</p></ol>
424
425<h5>image</h5>
426<ol><p>the image.</p></ol>
427
428 </div>
429<h2><a href="http://www.imagemagick.org/api/MagickCore/image
430_8c.html" target="source" name="GetImageClipMask">GetImageClipMask</a></h2>
431<div class="doc-section">
432
433<p>GetImageClipMask() returns the clip path associated with the image.</p></ol>
434
435<p>The format of the GetImageClipMask method is:</p>
436
437<pre class="code">
438 Image *GetImageClipMask(const Image *image,ExceptionInfo *exception)
439</pre>
440
441<p>A description of each parameter follows:</p></ol>
442
443<h5>image</h5>
444<ol><p>the image.</p></ol>
445
446 </div>
447<h2><a href="http://www.imagemagick.org/api/MagickCore/image
448_8c.html" target="source" name="GetImageException">GetImageException</a></h2>
449<div class="doc-section">
450
451<p>GetImageException() traverses an image sequence and returns any error more severe than noted by the exception parameter.</p></ol>
452
453<p>The format of the GetImageException method is:</p>
454
455<pre class="code">
456 void GetImageException(Image *image,ExceptionInfo *exception)
457</pre>
458
459<p>A description of each parameter follows:</p></ol>
460
461<h5>image</h5>
462<ol><p>Specifies a pointer to a list of one or more images.</p></ol>
463
464<h5>exception</h5>
465<ol><p>return the highest severity exception.</p></ol>
466
467 </div>
468<h2><a href="http://www.imagemagick.org/api/MagickCore/image
469_8c.html" target="source" name="GetImageInfo">GetImageInfo</a></h2>
470<div class="doc-section">
471
472<p>GetImageInfo() initializes image_info to default values.</p></ol>
473
474<p>The format of the GetImageInfo method is:</p>
475
476<pre class="code">
477 void GetImageInfo(ImageInfo *image_info)
478</pre>
479
480<p>A description of each parameter follows:</p></ol>
481
482<h5>image_info</h5>
483<ol><p>the image info.</p></ol>
484
485 </div>
486<h2><a href="http://www.imagemagick.org/api/MagickCore/image
cristya13871a2009-12-06 19:01:22 +0000[diff] [blame]487_8c.html" target="source" name="GetImageInfoFile">GetImageInfoFile</a></h2>
488<div class="doc-section">
489
490<p>GetImageInfoFile() returns the image info file member.</p></ol>
491
492<p>The format of the GetImageInfoFile method is:</p>
493
494<pre class="code">
495 FILE *GetImageInfoFile(const ImageInfo *image_info)
496</pre>
497
498<p>A description of each parameter follows:</p></ol>
499
500<h5>image_info</h5>
501<ol><p>the image info.</p></ol>
502
503 </div>
504<h2><a href="http://www.imagemagick.org/api/MagickCore/image
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]505_8c.html" target="source" name="GetImageMask">GetImageMask</a></h2>
506<div class="doc-section">
507
508<p>GetImageMask() returns the mask associated with the image.</p></ol>
509
510<p>The format of the GetImageMask method is:</p>
511
512<pre class="code">
513 Image *GetImageMask(const Image *image,ExceptionInfo *exception)
514</pre>
515
516<p>A description of each parameter follows:</p></ol>
517
518<h5>image</h5>
519<ol><p>the image.</p></ol>
520
521 </div>
522<h2><a href="http://www.imagemagick.org/api/MagickCore/image
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]523_8c.html" target="source" name="GetImageVirtualPixelMethod">GetImageVirtualPixelMethod</a></h2>
524<div class="doc-section">
525
526<p>GetImageVirtualPixelMethod() gets the "virtual pixels" method for the image. A virtual pixel is any pixel access that is outside the boundaries of the image cache.</p></ol>
527
528<p>The format of the GetImageVirtualPixelMethod() method is:</p>
529
530<pre class="code">
531 VirtualPixelMethod GetImageVirtualPixelMethod(const Image *image)
532</pre>
533
534<p>A description of each parameter follows:</p></ol>
535
536<h5>image</h5>
537<ol><p>the image.</p></ol>
538
539 </div>
540<h2><a href="http://www.imagemagick.org/api/MagickCore/image
541_8c.html" target="source" name="InterpretImageFilename">InterpretImageFilename</a></h2>
542<div class="doc-section">
543
544<p>InterpretImageFilename() interprets embedded characters in an image filename. The filename length is returned.</p></ol>
545
546<p>The format of the InterpretImageFilename method is:</p>
547
548<pre class="code">
549 size_t InterpretImageFilename(const ImageInfo *image_info,
550 Image *image,const char *format,int value,char *filename)
551</pre>
552
553<p>A description of each parameter follows.</p></ol>
554
555<h5>image_info</h5>
556<ol><p>the image info..</p></ol>
557
558<h5>image</h5>
559<ol><p>the image.</p></ol>
560
561<h5>format</h5>
562<ol><p>A filename describing the format to use to write the numeric argument. Only the first numeric format identifier is replaced.</p></ol>
563
564<h5>value</h5>
565<ol><p>Numeric value to substitute into format filename.</p></ol>
566
567<h5>filename</h5>
568<ol><p>return the formatted filename in this character buffer.</p></ol>
569
570 </div>
571<h2><a href="http://www.imagemagick.org/api/MagickCore/image
572_8c.html" target="source" name="IsHighDynamicRangeImage">IsHighDynamicRangeImage</a></h2>
573<div class="doc-section">
574
575<p>IsHighDynamicRangeImage() returns MagickTrue if any pixel component is non-integer or exceeds the bounds of the quantum depth (e.g. for Q16 0..65535.</p></ol>
576
577<p>The format of the IsHighDynamicRangeImage method is:</p>
578
579<pre class="code">
580 MagickBooleanType IsHighDynamicRangeImage(const Image *image,
581 ExceptionInfo *exception)
582</pre>
583
584<p>A description of each parameter follows:</p></ol>
585
586<h5>image</h5>
587<ol><p>the image.</p></ol>
588
589<h5>exception</h5>
590<ol><p>return any errors or warnings in this structure.</p></ol>
591
592 </div>
593<h2><a href="http://www.imagemagick.org/api/MagickCore/image
594_8c.html" target="source" name="IsImageObject">IsImageObject</a></h2>
595<div class="doc-section">
596
597<p>IsImageObject() returns MagickTrue if the image sequence contains a valid set of image objects.</p></ol>
598
599<p>The format of the IsImageObject method is:</p>
600
601<pre class="code">
602 MagickBooleanType IsImageObject(const Image *image)
603</pre>
604
605<p>A description of each parameter follows:</p></ol>
606
607<h5>image</h5>
608<ol><p>the image.</p></ol>
609
610 </div>
611<h2><a href="http://www.imagemagick.org/api/MagickCore/image
612_8c.html" target="source" name="IsTaintImage">IsTaintImage</a></h2>
613<div class="doc-section">
614
615<p>IsTaintImage() returns MagickTrue any pixel in the image has been altered since it was first constituted.</p></ol>
616
617<p>The format of the IsTaintImage method is:</p>
618
619<pre class="code">
620 MagickBooleanType IsTaintImage(const Image *image)
621</pre>
622
623<p>A description of each parameter follows:</p></ol>
624
625<h5>image</h5>
626<ol><p>the image.</p></ol>
627
628 </div>
629<h2><a href="http://www.imagemagick.org/api/MagickCore/image
630_8c.html" target="source" name="ModifyImage">ModifyImage</a></h2>
631<div class="doc-section">
632
633<p>ModifyImage() ensures that there is only a single reference to the image to be modified, updating the provided image pointer to point to a clone of the original image if necessary.</p></ol>
634
635<p>The format of the ModifyImage method is:</p>
636
637<pre class="code">
638 MagickBooleanType ModifyImage(Image *image,ExceptionInfo *exception)
639</pre>
640
641<p>A description of each parameter follows:</p></ol>
642
643<h5>image</h5>
644<ol><p>the image.</p></ol>
645
646<h5>exception</h5>
647<ol><p>return any errors or warnings in this structure.</p></ol>
648
649 </div>
650<h2><a href="http://www.imagemagick.org/api/MagickCore/image
651_8c.html" target="source" name="NewMagickImage">NewMagickImage</a></h2>
652<div class="doc-section">
653
654<p>NewMagickImage() creates a blank image canvas of the specified size and background color.</p></ol>
655
656<p>The format of the NewMagickImage method is:</p>
657
658<pre class="code">
659 Image *NewMagickImage(const ImageInfo *image_info,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]660 const size_t width,const size_t height,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]661 const MagickPixelPacket *background)
662</pre>
663
664<p>A description of each parameter follows:</p></ol>
665
666<h5>image</h5>
667<ol><p>the image.</p></ol>
668
669<h5>width</h5>
670<ol><p>the image width.</p></ol>
671
672<h5>height</h5>
673<ol><p>the image height.</p></ol>
674
675<h5>background</h5>
676<ol><p>the image color.</p></ol>
677
678 </div>
679<h2><a href="http://www.imagemagick.org/api/MagickCore/image
680_8c.html" target="source" name="ReferenceImage">ReferenceImage</a></h2>
681<div class="doc-section">
682
683<p>ReferenceImage() increments the reference count associated with an image returning a pointer to the image.</p></ol>
684
685<p>The format of the ReferenceImage method is:</p>
686
687<pre class="code">
688 Image *ReferenceImage(Image *image)
689</pre>
690
691<p>A description of each parameter follows:</p></ol>
692
693<h5>image</h5>
694<ol><p>the image.</p></ol>
695
696 </div>
697<h2><a href="http://www.imagemagick.org/api/MagickCore/image
698_8c.html" target="source" name="ResetImagePage">ResetImagePage</a></h2>
699<div class="doc-section">
700
701<p>ResetImagePage() resets the image page canvas and position.</p></ol>
702
703<p>The format of the ResetImagePage method is:</p>
704
705<pre class="code">
706 MagickBooleanType ResetImagePage(Image *image,const char *page)
707</pre>
708
709<p>A description of each parameter follows:</p></ol>
710
711<h5>image</h5>
712<ol><p>the image.</p></ol>
713
714<h5>page</h5>
715<ol><p>the relative page specification.</p></ol>
716
717 </div>
718<h2><a href="http://www.imagemagick.org/api/MagickCore/image
719_8c.html" target="source" name="SeparateImageChannel">SeparateImageChannel</a></h2>
720<div class="doc-section">
721
722<p>SeparateImageChannel() separates a channel from the image and returns it as a grayscale image. A channel is a particular color component of each pixel in the image.</p></ol>
723
724<p>The format of the SeparateImageChannel method is:</p>
725
726<pre class="code">
727 MagickBooleanType SeparateImageChannel(Image *image,
728 const ChannelType channel)
729</pre>
730
731<p>A description of each parameter follows:</p></ol>
732
733<h5>image</h5>
734<ol><p>the image.</p></ol>
735
736<h5>channel</h5>
737<ol><p>Identify which channel to extract: RedChannel, GreenChannel, BlueChannel, OpacityChannel, CyanChannel, MagentaChannel, YellowChannel, or BlackChannel.</p></ol>
738
739 </div>
740<h2><a href="http://www.imagemagick.org/api/MagickCore/image
741_8c.html" target="source" name="SeparateImages">SeparateImages</a></h2>
742<div class="doc-section">
743
744<p>SeparateImages() returns a separate grayscale image for each channel specified.</p></ol>
745
746<p>The format of the SeparateImages method is:</p>
747
748<pre class="code">
749 MagickBooleanType SeparateImages(const Image *image,
750 const ChannelType channel,ExceptionInfo *exception)
751</pre>
752
753<p>A description of each parameter follows:</p></ol>
754
755<h5>image</h5>
756<ol><p>the image.</p></ol>
757
758<h5>channel</h5>
759<ol><p>Identify which channels to extract: RedChannel, GreenChannel, BlueChannel, OpacityChannel, CyanChannel, MagentaChannel, YellowChannel, or BlackChannel.</p></ol>
760
761<h5>exception</h5>
762<ol><p>return any errors or warnings in this structure.</p></ol>
763
764 </div>
765<h2><a href="http://www.imagemagick.org/api/MagickCore/image
766_8c.html" target="source" name="SetImageAlphaChannel">SetImageAlphaChannel</a></h2>
767<div class="doc-section">
768
769<p>SetImageAlphaChannel() activates, deactivates, resets, or sets the alpha channel.</p></ol>
770
771<p>The format of the SetImageAlphaChannel method is:</p>
772
773<pre class="code">
774 MagickBooleanType SetImageAlphaChannel(Image *image,
775 const AlphaChannelType alpha_type)
776</pre>
777
778<p>A description of each parameter follows:</p></ol>
779
780<h5>image</h5>
781<ol><p>the image.</p></ol>
782
783<h5>alpha_type</h5>
784<ol><p>The alpha channel type: ActivateAlphaChannel, CopyAlphaChannel, DeactivateAlphaChannel, ExtractAlphaChannel, OpaqueAlphaChannel, ResetAlphaChannel, SetAlphaChannel, ShapeAlphaChannel, and TransparentAlphaChannel.</p></ol>
785
786 </div>
787<h2><a href="http://www.imagemagick.org/api/MagickCore/image
788_8c.html" target="source" name="SetImageBackgroundColor">SetImageBackgroundColor</a></h2>
789<div class="doc-section">
790
791<p>SetImageBackgroundColor() initializes the image pixels to the image background color. The background color is defined by the background_color member of the image structure.</p></ol>
792
793<p>The format of the SetImage method is:</p>
794
795<pre class="code">
796 MagickBooleanType SetImageBackgroundColor(Image *image)
797</pre>
798
799<p>A description of each parameter follows:</p></ol>
800
801<h5>image</h5>
802<ol><p>the image.</p></ol>
803
804 </div>
805<h2><a href="http://www.imagemagick.org/api/MagickCore/image
cristy83a272e2010-05-07 20:40:35 +0000[diff] [blame]806_8c.html" target="source" name="SetImageColor">SetImageColor</a></h2>
807<div class="doc-section">
808
809<p>SetImageColor() set the entire image canvas to the specified color.</p></ol>
810
811<p>The format of the SetImageColor method is:</p>
812
813<pre class="code">
814 MagickBooleanType SetImageColor(Image *image,
815 const MagickPixelPacket *color)
816</pre>
817
818<p>A description of each parameter follows:</p></ol>
819
820<h5>image</h5>
821<ol><p>the image.</p></ol>
822
823<h5>background</h5>
824<ol><p>the image color.</p></ol>
825
826 </div>
827<h2><a href="http://www.imagemagick.org/api/MagickCore/image
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]828_8c.html" target="source" name="SetImageStorageClass">SetImageStorageClass</a></h2>
829<div class="doc-section">
830
831<p>SetImageStorageClass() sets the image class: DirectClass for true color images or PseudoClass for colormapped images.</p></ol>
832
833<p>The format of the SetImageStorageClass method is:</p>
834
835<pre class="code">
836 MagickBooleanType SetImageStorageClass(Image *image,
837 const ClassType storage_class)
838</pre>
839
840<p>A description of each parameter follows:</p></ol>
841
842<h5>image</h5>
843<ol><p>the image.</p></ol>
844
845<h5>storage_class</h5>
846<ol><p>The image class.</p></ol>
847
848 </div>
849<h2><a href="http://www.imagemagick.org/api/MagickCore/image
850_8c.html" target="source" name="SetImageClipMask">SetImageClipMask</a></h2>
851<div class="doc-section">
852
853<p>SetImageClipMask() associates a clip path with the image. The clip path must be the same dimensions as the image. Set any pixel component of the clip path to TransparentOpacity to prevent that corresponding image pixel component from being updated when SyncAuthenticPixels() is applied.</p></ol>
854
855<p>The format of the SetImageClipMask method is:</p>
856
857<pre class="code">
858 MagickBooleanType SetImageClipMask(Image *image,const Image *clip_mask)
859</pre>
860
861<p>A description of each parameter follows:</p></ol>
862
863<h5>image</h5>
864<ol><p>the image.</p></ol>
865
866<h5>clip_mask</h5>
867<ol><p>the image clip path.</p></ol>
868
869 </div>
870<h2><a href="http://www.imagemagick.org/api/MagickCore/image
871_8c.html" target="source" name="SetImageExtent">SetImageExtent</a></h2>
872<div class="doc-section">
873
874<p>SetImageExtent() sets the image size (i.e. columns & rows).</p></ol>
875
876<p>The format of the SetImageExtent method is:</p>
877
878<pre class="code">
879 MagickBooleanType SetImageExtent(Image *image,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]880 const size_t columns,const size_t rows)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]881</pre>
882
883<p>A description of each parameter follows:</p></ol>
884
885<h5>image</h5>
886<ol><p>the image.</p></ol>
887
888<h5>columns</h5>
889<ol><p>The image width in pixels.</p></ol>
890
891<h5>rows</h5>
892<ol><p>The image height in pixels.</p></ol>
893
894 </div>
895<h2><a href="http://www.imagemagick.org/api/MagickCore/image
896_8c.html" target="source" name="SetImageInfoBlob">SetImageInfoBlob</a></h2>
897<div class="doc-section">
898
899<p>SetImageInfoBlob() sets the image info blob member.</p></ol>
900
901<p>The format of the SetImageInfoBlob method is:</p>
902
903<pre class="code">
904 void SetImageInfoBlob(ImageInfo *image_info,const void *blob,
905 const size_t length)
906</pre>
907
908<p>A description of each parameter follows:</p></ol>
909
910<h5>image_info</h5>
911<ol><p>the image info.</p></ol>
912
913<h5>blob</h5>
914<ol><p>the blob.</p></ol>
915
916<h5>length</h5>
917<ol><p>the blob length.</p></ol>
918
919 </div>
920<h2><a href="http://www.imagemagick.org/api/MagickCore/image
921_8c.html" target="source" name="SetImageInfoFile">SetImageInfoFile</a></h2>
922<div class="doc-section">
923
924<p>SetImageInfoFile() sets the image info file member.</p></ol>
925
926<p>The format of the SetImageInfoFile method is:</p>
927
928<pre class="code">
929 void SetImageInfoFile(ImageInfo *image_info,FILE *file)
930</pre>
931
932<p>A description of each parameter follows:</p></ol>
933
934<h5>image_info</h5>
935<ol><p>the image info.</p></ol>
936
937<h5>file</h5>
938<ol><p>the file.</p></ol>
939
940 </div>
941<h2><a href="http://www.imagemagick.org/api/MagickCore/image
942_8c.html" target="source" name="SetImageMask">SetImageMask</a></h2>
943<div class="doc-section">
944
945<p>SetImageMask() associates a mask with the image. The mask must be the same dimensions as the image.</p></ol>
946
947<p>The format of the SetImageMask method is:</p>
948
949<pre class="code">
950 MagickBooleanType SetImageMask(Image *image,const Image *mask)
951</pre>
952
953<p>A description of each parameter follows:</p></ol>
954
955<h5>image</h5>
956<ol><p>the image.</p></ol>
957
958<h5>mask</h5>
959<ol><p>the image mask.</p></ol>
960
961 </div>
962<h2><a href="http://www.imagemagick.org/api/MagickCore/image
963_8c.html" target="source" name="SetImageOpacity">SetImageOpacity</a></h2>
964<div class="doc-section">
965
966<p>SetImageOpacity() sets the opacity levels of the image.</p></ol>
967
968<p>The format of the SetImageOpacity method is:</p>
969
970<pre class="code">
971 MagickBooleanType SetImageOpacity(Image *image,const Quantum opacity)
972</pre>
973
974<p>A description of each parameter follows:</p></ol>
975
976<h5>image</h5>
977<ol><p>the image.</p></ol>
978
979<h5>opacity</h5>
980<ol><p>the level of transparency: 0 is fully opaque and QuantumRange is fully transparent.</p></ol>
981
982 </div>
983<h2><a href="http://www.imagemagick.org/api/MagickCore/image
984_8c.html" target="source" name="SetImageType">SetImageType</a></h2>
985<div class="doc-section">
986
987<p>SetImageType() sets the type of image. Choose from these types:</p></ol>
988
989<p>Bilevel Grayscale GrayscaleMatte Palette PaletteMatte TrueColor TrueColorMatte ColorSeparation ColorSeparationMatte OptimizeType</p></ol>
990
991<p>The format of the SetImageType method is:</p>
992
993<pre class="code">
994 MagickBooleanType SetImageType(Image *image,const ImageType type)
995</pre>
996
997<p>A description of each parameter follows:</p></ol>
998
999<h5>image</h5>
1000<ol><p>the image.</p></ol>
1001
1002<h5>type</h5>
1003<ol><p>Image type.</p></ol>
1004
1005 </div>
1006<h2><a href="http://www.imagemagick.org/api/MagickCore/image
1007_8c.html" target="source" name="SetImageVirtualPixelMethod">SetImageVirtualPixelMethod</a></h2>
1008<div class="doc-section">
1009
1010<p>SetImageVirtualPixelMethod() sets the "virtual pixels" method for the image and returns the previous setting. A virtual pixel is any pixel access that is outside the boundaries of the image cache.</p></ol>
1011
1012<p>The format of the SetImageVirtualPixelMethod() method is:</p>
1013
1014<pre class="code">
1015 VirtualPixelMethod SetImageVirtualPixelMethod(const Image *image,
1016 const VirtualPixelMethod virtual_pixel_method)
1017</pre>
1018
1019<p>A description of each parameter follows:</p></ol>
1020
1021<h5>image</h5>
1022<ol><p>the image.</p></ol>
1023
1024<h5>virtual_pixel_method</h5>
1025<ol><p>choose the type of virtual pixel.</p></ol>
1026
1027 </div>
1028<h2><a href="http://www.imagemagick.org/api/MagickCore/image
1029_8c.html" target="source" name="StripImage">StripImage</a></h2>
1030<div class="doc-section">
1031
1032<p>StripImage() strips an image of all profiles and comments.</p></ol>
1033
1034<p>The format of the StripImage method is:</p>
1035
1036<pre class="code">
1037 MagickBooleanType StripImage(Image *image)
1038</pre>
1039
1040<p>A description of each parameter follows:</p></ol>
1041
1042<h5>image</h5>
1043<ol><p>the image.</p></ol>
1044
1045 </div>
cristy0f61e612009-11-10 20:03:57 +0000[diff] [blame]1046<h2><a href="http://www.imagemagick.org/api/MagickCore/image
1047_8c.html" target="source" name="SyncImageSettings">SyncImageSettings</a></h2>
1048<div class="doc-section">
1049
1050<p>SyncImageSettings() sync the image info options to the image.</p></ol>
1051
1052<p>The format of the SyncImageSettings method is:</p>
1053
1054<pre class="code">
1055 MagickBooleanType SyncImageSettings(const ImageInfo *image_info,
1056 Image *image)
1057 MagickBooleanType SyncImagesSettings(const ImageInfo *image_info,
1058 Image *image)
1059</pre>
1060
1061<p>A description of each parameter follows:</p></ol>
1062
1063<h5>image_info</h5>
1064<ol><p>the image info.</p></ol>
1065
1066<h5>image</h5>
1067<ol><p>the image.</p></ol>
1068
1069 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]1070
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