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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="#CropImageToTiles">CropImageToTiles</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="#to CropImageToTiles">to CropImageToTiles</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. Region must be fully defined, and no special handling of geometry flags is performed.</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="CropImageToTiles">CropImageToTiles</a></h2>
251 <div class="doc-section">
253 <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>
255 <p>Image *CropImageToTiles(const Image *image,const RectangleInfo *crop_geometry, ExceptionInfo *exception)</p>
257 <p>A description of each parameter follows:</p>
260 <p>the image The transformed image is returned as this parameter.</p>
262 <h5>crop_geometry</h5>
263 <p>A crop geometry string.</p>
266 <p>return any errors or warnings in this structure.</p>
269 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ExcerptImage">ExcerptImage</a></h2>
270 <div class="doc-section">
272 <p>ExcerptImage() returns a excerpt of the image as defined by the geometry.</p>
274 <p>The format of the ExcerptImage method is:</p>
277 Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
278 ExceptionInfo *exception)
281 <p>A description of each parameter follows:</p>
287 <p>Define the region of the image to extend with members x, y, width, and height.</p>
290 <p>return any errors or warnings in this structure.</p>
293 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ExtentImage">ExtentImage</a></h2>
294 <div class="doc-section">
296 <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>
298 <p>The format of the ExtentImage method is:</p>
301 Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
302 ExceptionInfo *exception)
305 <p>A description of each parameter follows:</p>
311 <p>Define the region of the image to extend with members x, y, width, and height.</p>
314 <p>return any errors or warnings in this structure.</p>
317 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="FlipImage">FlipImage</a></h2>
318 <div class="doc-section">
320 <p>FlipImage() creates a vertical mirror image by reflecting the pixels around the central x-axis.</p>
322 <p>The format of the FlipImage method is:</p>
325 Image *FlipImage(const Image *image,ExceptionInfo *exception)
328 <p>A description of each parameter follows:</p>
334 <p>return any errors or warnings in this structure.</p>
337 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="FlopImage">FlopImage</a></h2>
338 <div class="doc-section">
340 <p>FlopImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis.</p>
342 <p>The format of the FlopImage method is:</p>
345 Image *FlopImage(const Image *image,ExceptionInfo *exception)
348 <p>A description of each parameter follows:</p>
354 <p>return any errors or warnings in this structure.</p>
357 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="RollImage">RollImage</a></h2>
358 <div class="doc-section">
360 <p>RollImage() offsets an image as defined by x_offset and y_offset.</p>
362 <p>The format of the RollImage method is:</p>
365 Image *RollImage(const Image *image,const ssize_t x_offset,
366 const ssize_t y_offset,ExceptionInfo *exception)
369 <p>A description of each parameter follows:</p>
375 <p>the number of columns to roll in the horizontal direction.</p>
378 <p>the number of rows to roll in the vertical direction.</p>
381 <p>return any errors or warnings in this structure.</p>
384 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="ShaveImage">ShaveImage</a></h2>
385 <div class="doc-section">
387 <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>
389 <p>The format of the ShaveImage method is:</p>
392 Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
393 ExceptionInfo *exception)
396 <p>A description of each parameter follows:</p>
399 <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>
405 <p>Specifies a pointer to a RectangleInfo which defines the region of the image to crop.</p>
408 <p>return any errors or warnings in this structure.</p>
411 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="SpliceImage">SpliceImage</a></h2>
412 <div class="doc-section">
414 <p>SpliceImage() splices a solid color into the image as defined by the geometry.</p>
416 <p>The format of the SpliceImage method is:</p>
419 Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
420 ExceptionInfo *exception)
423 <p>A description of each parameter follows:</p>
429 <p>Define the region of the image to splice with members x, y, width, and height.</p>
432 <p>return any errors or warnings in this structure.</p>
435 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransformImage">TransformImage</a></h2>
436 <div class="doc-section">
438 <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>
440 <p>This should only be used for single images.</p>
442 <p>The format of the TransformImage method is:</p>
445 MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
446 const char *image_geometry)
449 <p>A description of each parameter follows:</p>
452 <p>the image The transformed image is returned as this parameter.</p>
454 <h5>crop_geometry</h5>
455 <p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
457 <h5>image_geometry</h5>
458 <p>An image geometry string. This geometry defines the final size of the image.</p>
461 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="to_CropImageToTiles">to CropImageToTiles</a></h2>
462 <div class="doc-section">
464 <p>to CropImageToTiles() or ResizeImage(), as appropriate.</p>
467 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransformImages">TransformImages</a></h2>
468 <div class="doc-section">
470 <p>TransformImages() calls TransformImage() on each image of a sequence.</p>
472 <p>The format of the TransformImage method is:</p>
475 MagickBooleanType TransformImages(Image **image,
476 const char *crop_geometry,const char *image_geometry)
479 <p>A description of each parameter follows:</p>
482 <p>the image The transformed image is returned as this parameter.</p>
484 <h5>crop_geometry</h5>
485 <p>A crop geometry string. This geometry defines a subregion of the image to crop.</p>
487 <h5>image_geometry</h5>
488 <p>An image geometry string. This geometry defines the final size of the image.</p>
491 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransposeImage">TransposeImage</a></h2>
492 <div class="doc-section">
494 <p>TransposeImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis while rotating them by 90 degrees.</p>
496 <p>The format of the TransposeImage method is:</p>
499 Image *TransposeImage(const Image *image,ExceptionInfo *exception)
502 <p>A description of each parameter follows:</p>
508 <p>return any errors or warnings in this structure.</p>
511 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TransverseImage">TransverseImage</a></h2>
512 <div class="doc-section">
514 <p>TransverseImage() creates a vertical mirror image by reflecting the pixels around the central x-axis while rotating them by 270 degrees.</p>
516 <p>The format of the TransverseImage method is:</p>
519 Image *TransverseImage(const Image *image,ExceptionInfo *exception)
522 <p>A description of each parameter follows:</p>
528 <p>return any errors or warnings in this structure.</p>
531 <h2><a href="http://www.imagemagick.org/api/MagickCore/transform_8c.html" id="TrimImage">TrimImage</a></h2>
532 <div class="doc-section">
534 <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>
536 <p>The format of the TrimImage method is:</p>
539 Image *TrimImage(const Image *image,ExceptionInfo *exception)
542 <p>A description of each parameter follows:</p>
548 <p>return any errors or warnings in this structure.</p>
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