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199 <h1>Module transform Methods</h1>
200 <p class="navigation-index">[<a href="#ChopImage">ChopImage</a> • <a href="#CropImage">CropImage</a> • <a href="#ExcerptImage">ExcerptImage</a> • <a href="#ExtentImage">ExtentImage</a> • <a href="#FlipImage">FlipImage</a> • <a href="#FlopImage">FlopImage</a> • <a href="#RollImage">RollImage</a> • <a href="#ShaveImage">ShaveImage</a> • <a href="#SpliceImage">SpliceImage</a> • <a href="#TransformImage">TransformImage</a> • <a href="#TransformImages">TransformImages</a> • <a href="#TransposeImage">TransposeImage</a> • <a href="#TransverseImage">TransverseImage</a> • <a href="#TrimImage">TrimImage</a>]</p>
202 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ChopImage">ChopImage</a></h2>
203 <div class="doc-section">
205 <p>ChopImage() removes a region of an image and collapses the image to occupy the removed portion.</p>
207 <p>The format of the ChopImage method is:</p>
210 Image *ChopImage(const Image *image,const RectangleInfo *chop_info)
211 ExceptionInfo *exception)
214 <p>A description of each parameter follows:</p>
220 <p>Define the region of the image to chop.</p>
223 <p>return any errors or warnings in this structure.</p>
226 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="CropImage">CropImage</a></h2>
227 <div class="doc-section">
229 <p>CropImage() extracts a region of the image starting at the offset defined by geometry.</p>
231 <p>The format of the CropImage method is:</p>
234 Image *CropImage(const Image *image,const RectangleInfo *geometry,
235 ExceptionInfo *exception)
238 <p>A description of each parameter follows:</p>
244 <p>Define the region of the image to crop with members x, y, width, and height.</p>
247 <p>return any errors or warnings in this structure.</p>
250 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ExcerptImage">ExcerptImage</a></h2>
251 <div class="doc-section">
253 <p>ExcerptImage() returns a excerpt of the image as defined by the geometry.</p>
255 <p>The format of the ExcerptImage method is:</p>
258 Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
259 ExceptionInfo *exception)
262 <p>A description of each parameter follows:</p>
268 <p>Define the region of the image to extend with members x, y, width, and height.</p>
271 <p>return any errors or warnings in this structure.</p>
274 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ExtentImage">ExtentImage</a></h2>
275 <div class="doc-section">
277 <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>
279 <p>The format of the ExtentImage method is:</p>
282 Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
283 ExceptionInfo *exception)
286 <p>A description of each parameter follows:</p>
292 <p>Define the region of the image to extend with members x, y, width, and height.</p>
295 <p>return any errors or warnings in this structure.</p>
298 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="FlipImage">FlipImage</a></h2>
299 <div class="doc-section">
301 <p>FlipImage() creates a vertical mirror image by reflecting the pixels around the central x-axis.</p>
303 <p>The format of the FlipImage method is:</p>
306 Image *FlipImage(const Image *image,ExceptionInfo *exception)
309 <p>A description of each parameter follows:</p>
315 <p>return any errors or warnings in this structure.</p>
318 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="FlopImage">FlopImage</a></h2>
319 <div class="doc-section">
321 <p>FlopImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis.</p>
323 <p>The format of the FlopImage method is:</p>
326 Image *FlopImage(const Image *image,ExceptionInfo *exception)
329 <p>A description of each parameter follows:</p>
335 <p>return any errors or warnings in this structure.</p>
338 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="RollImage">RollImage</a></h2>
339 <div class="doc-section">
341 <p>RollImage() offsets an image as defined by x_offset and y_offset.</p>
343 <p>The format of the RollImage method is:</p>
346 Image *RollImage(const Image *image,const ssize_t x_offset,
347 const ssize_t y_offset,ExceptionInfo *exception)
350 <p>A description of each parameter follows:</p>
356 <p>the number of columns to roll in the horizontal direction.</p>
359 <p>the number of rows to roll in the vertical direction.</p>
362 <p>return any errors or warnings in this structure.</p>
365 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ShaveImage">ShaveImage</a></h2>
366 <div class="doc-section">
368 <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>
370 <p>The format of the ShaveImage method is:</p>
373 Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
374 ExceptionInfo *exception)
377 <p>A description of each parameter follows:</p>
380 <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>
386 <p>Specifies a pointer to a RectangleInfo which defines the region of the image to crop.</p>
389 <p>return any errors or warnings in this structure.</p>
392 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="SpliceImage">SpliceImage</a></h2>
393 <div class="doc-section">
395 <p>SpliceImage() splices a solid color into the image as defined by the geometry.</p>
397 <p>The format of the SpliceImage method is:</p>
400 Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
401 ExceptionInfo *exception)
404 <p>A description of each parameter follows:</p>
410 <p>Define the region of the image to splice with members x, y, width, and height.</p>
413 <p>return any errors or warnings in this structure.</p>
416 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransformImage">TransformImage</a></h2>
417 <div class="doc-section">
419 <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>
421 <p>The format of the TransformImage method is:</p>
424 MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
425 const char *image_geometry)
428 <p>A description of each parameter follows:</p>
431 <p>the image The transformed image is returned as this parameter.</p>
433 <h5>crop_geometry</h5>
434 <p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
436 <h5>image_geometry</h5>
437 <p>An image geometry string. This geometry defines the final size of the image.</p>
440 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransformImages">TransformImages</a></h2>
441 <div class="doc-section">
443 <p>TransformImages() calls TransformImage() on each image of a sequence.</p>
445 <p>The format of the TransformImage method is:</p>
448 MagickBooleanType TransformImages(Image **image,
449 const char *crop_geometry,const char *image_geometry)
452 <p>A description of each parameter follows:</p>
455 <p>the image The transformed image is returned as this parameter.</p>
457 <h5>crop_geometry</h5>
458 <p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
460 <h5>image_geometry</h5>
461 <p>An image geometry string. This geometry defines the final size of the image.</p>
464 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransposeImage">TransposeImage</a></h2>
465 <div class="doc-section">
467 <p>TransposeImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis while rotating them by 90 degrees.</p>
469 <p>The format of the TransposeImage method is:</p>
472 Image *TransposeImage(const Image *image,ExceptionInfo *exception)
475 <p>A description of each parameter follows:</p>
481 <p>return any errors or warnings in this structure.</p>
484 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransverseImage">TransverseImage</a></h2>
485 <div class="doc-section">
487 <p>TransverseImage() creates a vertical mirror image by reflecting the pixels around the central x-axis while rotating them by 270 degrees.</p>
489 <p>The format of the TransverseImage method is:</p>
492 Image *TransverseImage(const Image *image,ExceptionInfo *exception)
495 <p>A description of each parameter follows:</p>
501 <p>return any errors or warnings in this structure.</p>
504 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TrimImage">TrimImage</a></h2>
505 <div class="doc-section">
507 <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>
509 <p>The format of the TrimImage method is:</p>
512 Image *TrimImage(const Image *image,ExceptionInfo *exception)
515 <p>A description of each parameter follows:</p>
521 <p>return any errors or warnings in this structure.</p>
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