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gerrit-public.fairphone.software / platform / external / ImageMagick / c743d57edfa72dae1024835f39ee601d2d4fa385 / . / www / api / wand-view.html
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Cristy594d2772015-11-15 10:47:42 -0500[diff] [blame]60<p class="text-center"><a href="wand-view.html#CloneWandView">CloneWandView</a> &#8226; <a href="wand-view.html#DestroyWandView">DestroyWandView</a> &#8226; <a href="wand-view.html#DuplexTransferWandViewIterator">DuplexTransferWandViewIterator</a> &#8226; <a href="wand-view.html#GetWandViewException">GetWandViewException</a> &#8226; <a href="wand-view.html#GetWandViewExtent">GetWandViewExtent</a> &#8226; <a href="wand-view.html#GetWandViewIterator">GetWandViewIterator</a> &#8226; <a href="wand-view.html#GetWandViewPixels">GetWandViewPixels</a> &#8226; <a href="wand-view.html#GetWandViewWand">GetWandViewWand</a> &#8226; <a href="wand-view.html#IsWandView">IsWandView</a> &#8226; <a href="wand-view.html#NewWandView">NewWandView</a> &#8226; <a href="wand-view.html#NewWandViewExtent">NewWandViewExtent</a> &#8226; <a href="wand-view.html#SetWandViewDescription">SetWandViewDescription</a> &#8226; <a href="wand-view.html#SetWandViewIterator">SetWandViewIterator</a> &#8226; <a href="wand-view.html#TransferWandViewIterator">TransferWandViewIterator</a> &#8226; <a href="wand-view.html#UpdateWandViewIterator">UpdateWandViewIterator</a></p>
cristy06f63f22012-10-31 00:50:07 +0000[diff] [blame]61
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]62<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="CloneWandView">CloneWandView</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]63
64<p>CloneWandView() makes a copy of the specified wand view.</p>
65
66<p>The format of the CloneWandView method is:</p>
67
68<pre class="text">
69WandView *CloneWandView(const WandView *wand_view)
70</pre>
71
72<p>A description of each parameter follows:</p>
73
74<dd>
75</dd>
76
77<dd> </dd>
78<dl class="dl-horizontal">
79<dt>wand_view</dt>
80<dd>the wand view. </dd>
81
82<dd> </dd>
83</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]84<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="DestroyWandView">DestroyWandView</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]85
86<p>DestroyWandView() deallocates memory associated with a wand view.</p>
87
88<p>The format of the DestroyWandView method is:</p>
89
90<pre class="text">
91WandView *DestroyWandView(WandView *wand_view)
92</pre>
93
94<p>A description of each parameter follows:</p>
95
96<dd>
97</dd>
98
99<dd> </dd>
100<dl class="dl-horizontal">
101<dt>wand_view</dt>
102<dd>the wand view. </dd>
103
104<dd> </dd>
105</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]106<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="DuplexTransferWandViewIterator">DuplexTransferWandViewIterator</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]107
108<p>DuplexTransferWandViewIterator() iterates over three wand views in parallel and calls your transfer method for each scanline of the view. The source and duplex pixel extent is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. However, the destination wand view is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted.</p>
109
110<p>The callback signature is:</p>
111
112<pre class="text">
113MagickBooleanType DuplexTransferImageViewMethod(const WandView *source,
114 const WandView *duplex,WandView *destination,const ssize_t y,
115 const int thread_id,void *context)
116</pre>
117
118<p>Use this pragma if the view is not single threaded:</p>
119
120<pre class="text">
121 #pragma omp critical
122</pre>
123
124<p>to define a section of code in your callback transfer method that must be executed by a single thread at a time.</p>
125
126<p>The format of the DuplexTransferWandViewIterator method is:</p>
127
128<pre class="text">
129MagickBooleanType DuplexTransferWandViewIterator(WandView *source,
130 WandView *duplex,WandView *destination,
131 DuplexTransferWandViewMethod transfer,void *context)
132</pre>
133
134<p>A description of each parameter follows:</p>
135
136<dd>
137</dd>
138
139<dd> </dd>
140<dl class="dl-horizontal">
141<dt>source</dt>
142<dd>the source wand view. </dd>
143
144<dd> </dd>
145<dt>duplex</dt>
146<dd>the duplex wand view. </dd>
147
148<dd> </dd>
149<dt>destination</dt>
150<dd>the destination wand view. </dd>
151
152<dd> </dd>
153<dt>transfer</dt>
154<dd>the transfer callback method. </dd>
155
156<dd> </dd>
157<dt>context</dt>
158<dd>the user defined context. </dd>
159
160<dd> </dd>
161</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]162<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewException">GetWandViewException</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]163
164<p>GetWandViewException() returns the severity, reason, and description of any error that occurs when utilizing a wand view.</p>
165
166<p>The format of the GetWandViewException method is:</p>
167
168<pre class="text">
169char *GetWandViewException(const WandView *wand_view,
170 ExceptionType *severity)
171</pre>
172
173<p>A description of each parameter follows:</p>
174
175<dd>
176</dd>
177
178<dd> </dd>
179<dl class="dl-horizontal">
180<dt>wand_view</dt>
181<dd>the pixel wand_view. </dd>
182
183<dd> </dd>
184<dt>severity</dt>
185<dd>the severity of the error is returned here. </dd>
186
187<dd> </dd>
188</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]189<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewExtent">GetWandViewExtent</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]190
191<p>GetWandViewExtent() returns the wand view extent.</p>
192
193<p>The format of the GetWandViewExtent method is:</p>
194
195<pre class="text">
196RectangleInfo GetWandViewExtent(const WandView *wand_view)
197</pre>
198
199<p>A description of each parameter follows:</p>
200
201<dd>
202</dd>
203
204<dd> </dd>
205<dl class="dl-horizontal">
206<dt>wand_view</dt>
207<dd>the wand view. </dd>
208
209<dd> </dd>
210</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]211<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewIterator">GetWandViewIterator</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]212
213<p>GetWandViewIterator() iterates over the wand view in parallel and calls your get method for each scanline of the view. The pixel extent is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. Any updates to the pixels in your callback are ignored.</p>
214
215<p>The callback signature is:</p>
216
217<pre class="text">
218MagickBooleanType GetImageViewMethod(const WandView *source,
219 const ssize_t y,const int thread_id,void *context)
220</pre>
221
222<p>Use this pragma if the view is not single threaded:</p>
223
224<pre class="text">
225 #pragma omp critical
226</pre>
227
228<p>to define a section of code in your callback get method that must be executed by a single thread at a time.</p>
229
230<p>The format of the GetWandViewIterator method is:</p>
231
232<pre class="text">
233MagickBooleanType GetWandViewIterator(WandView *source,
234 GetWandViewMethod get,void *context)
235</pre>
236
237<p>A description of each parameter follows:</p>
238
239<dd>
240</dd>
241
242<dd> </dd>
243<dl class="dl-horizontal">
244<dt>source</dt>
245<dd>the source wand view. </dd>
246
247<dd> </dd>
248<dt>get</dt>
249<dd>the get callback method. </dd>
250
251<dd> </dd>
252<dt>context</dt>
253<dd>the user defined context. </dd>
254
255<dd> </dd>
256</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]257<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewPixels">GetWandViewPixels</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]258
259<p>GetWandViewPixels() returns the wand view pixel_wands.</p>
260
261<p>The format of the GetWandViewPixels method is:</p>
262
263<pre class="text">
264PixelWand *GetWandViewPixels(const WandView *wand_view)
265</pre>
266
267<p>A description of each parameter follows:</p>
268
269<dd>
270</dd>
271
272<dd> </dd>
273<dl class="dl-horizontal">
274<dt>wand_view</dt>
275<dd>the wand view. </dd>
276
277<dd> </dd>
278</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]279<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="GetWandViewWand">GetWandViewWand</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]280
281<p>GetWandViewWand() returns the magick wand associated with the wand view.</p>
282
283<p>The format of the GetWandViewWand method is:</p>
284
285<pre class="text">
286MagickWand *GetWandViewWand(const WandView *wand_view)
287</pre>
288
289<p>A description of each parameter follows:</p>
290
291<dd>
292</dd>
293
294<dd> </dd>
295<dl class="dl-horizontal">
296<dt>wand_view</dt>
297<dd>the wand view. </dd>
298
299<dd> </dd>
300</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]301<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="IsWandView">IsWandView</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]302
303<p>IsWandView() returns MagickTrue if the the parameter is verified as a wand view object.</p>
304
305<p>The format of the IsWandView method is:</p>
306
307<pre class="text">
308MagickBooleanType IsWandView(const WandView *wand_view)
309</pre>
310
311<p>A description of each parameter follows:</p>
312
313<dd>
314</dd>
315
316<dd> </dd>
317<dl class="dl-horizontal">
318<dt>wand_view</dt>
319<dd>the wand view. </dd>
320
321<dd> </dd>
322</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]323<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="NewWandView">NewWandView</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]324
325<p>NewWandView() returns a wand view required for all other methods in the Wand View API.</p>
326
327<p>The format of the NewWandView method is:</p>
328
329<pre class="text">
330WandView *NewWandView(MagickWand *wand)
331</pre>
332
333<p>A description of each parameter follows:</p>
334
335<dd>
336</dd>
337
338<dd> </dd>
339<dl class="dl-horizontal">
340<dt>wand</dt>
341<dd>the wand. </dd>
342
343<dd> </dd>
344</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]345<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="NewWandViewExtent">NewWandViewExtent</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]346
347<p>NewWandViewExtent() returns a wand view required for all other methods in the Wand View API.</p>
348
349<p>The format of the NewWandViewExtent method is:</p>
350
351<pre class="text">
352WandView *NewWandViewExtent(MagickWand *wand,const ssize_t x,
353 const ssize_t y,const size_t width,const size_t height)
354</pre>
355
356<p>A description of each parameter follows:</p>
357
358<dd>
359</dd>
360
361<dd> </dd>
362<dl class="dl-horizontal">
363<dt>wand</dt>
364<dd>the magick wand. </dd>
365
366<dd> </dd>
367<dt>x,y,columns,rows</dt>
368<dd> These values define the perimeter of a extent of pixel_wands view. </dd>
369
370<dd> </dd>
371</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]372<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="SetWandViewDescription">SetWandViewDescription</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]373
374<p>SetWandViewDescription() associates a description with an image view.</p>
375
376<p>The format of the SetWandViewDescription method is:</p>
377
378<pre class="text">
379void SetWandViewDescription(WandView *image_view,const char *description)
380</pre>
381
382<p>A description of each parameter follows:</p>
383
384<dd>
385</dd>
386
387<dd> </dd>
388<dl class="dl-horizontal">
389<dt>wand_view</dt>
390<dd>the wand view. </dd>
391
392<dd> </dd>
393<dt>description</dt>
394<dd>the wand view description. </dd>
395
396<dd> </dd>
397</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]398<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="SetWandViewIterator">SetWandViewIterator</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]399
400<p>SetWandViewIterator() iterates over the wand view in parallel and calls your set method for each scanline of the view. The pixel extent is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension. The pixels are initiallly undefined and any settings you make in the callback method are automagically synced back to your image.</p>
401
402<p>The callback signature is:</p>
403
404<pre class="text">
405MagickBooleanType SetImageViewMethod(ImageView *destination,
406 const ssize_t y,const int thread_id,void *context)
407</pre>
408
409<p>Use this pragma if the view is not single threaded:</p>
410
411<pre class="text">
412 #pragma omp critical
413</pre>
414
415<p>to define a section of code in your callback set method that must be executed by a single thread at a time.</p>
416
417<p>The format of the SetWandViewIterator method is:</p>
418
419<pre class="text">
420MagickBooleanType SetWandViewIterator(WandView *destination,
421 SetWandViewMethod set,void *context)
422</pre>
423
424<p>A description of each parameter follows:</p>
425
426<dd>
427</dd>
428
429<dd> </dd>
430<dl class="dl-horizontal">
431<dt>destination</dt>
432<dd>the wand view. </dd>
433
434<dd> </dd>
435<dt>set</dt>
436<dd>the set callback method. </dd>
437
438<dd> </dd>
439<dt>context</dt>
440<dd>the user defined context. </dd>
441
442<dd> </dd>
443</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]444<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="TransferWandViewIterator">TransferWandViewIterator</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]445
446<p>TransferWandViewIterator() iterates over two wand views in parallel and calls your transfer method for each scanline of the view. The source pixel extent is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. However, the destination wand view is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted.</p>
447
448<p>The callback signature is:</p>
449
450<pre class="text">
451MagickBooleanType TransferImageViewMethod(const WandView *source,
452 WandView *destination,const ssize_t y,const int thread_id,
453 void *context)
454</pre>
455
456<p>Use this pragma if the view is not single threaded:</p>
457
458<pre class="text">
459 #pragma omp critical
460</pre>
461
462<p>to define a section of code in your callback transfer method that must be executed by a single thread at a time.</p>
463
464<p>The format of the TransferWandViewIterator method is:</p>
465
466<pre class="text">
467MagickBooleanType TransferWandViewIterator(WandView *source,
468 WandView *destination,TransferWandViewMethod transfer,void *context)
469</pre>
470
471<p>A description of each parameter follows:</p>
472
473<dd>
474</dd>
475
476<dd> </dd>
477<dl class="dl-horizontal">
478<dt>source</dt>
479<dd>the source wand view. </dd>
480
481<dd> </dd>
482<dt>destination</dt>
483<dd>the destination wand view. </dd>
484
485<dd> </dd>
486<dt>transfer</dt>
487<dd>the transfer callback method. </dd>
488
489<dd> </dd>
490<dt>context</dt>
491<dd>the user defined context. </dd>
492
493<dd> </dd>
494</dl>
Cristye93be682015-11-26 09:07:51 -0500[diff] [blame]495<h2><a href="http://www.imagemagick.org/api/MagickWand/wand-view_8c.html" id="UpdateWandViewIterator">UpdateWandViewIterator</a></h2>
cristy99513ee2015-06-21 00:00:03 +0000[diff] [blame]496
497<p>UpdateWandViewIterator() iterates over the wand view in parallel and calls your update method for each scanline of the view. The pixel extent is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted. Updates to pixels in your callback are automagically synced back to the image.</p>
498
499<p>The callback signature is:</p>
500
501<pre class="text">
502MagickBooleanType UpdateImageViewMethod(WandView *source,const ssize_t y,
503 const int thread_id,void *context)
504</pre>
505
506<p>Use this pragma if the view is not single threaded:</p>
507
508<pre class="text">
509 #pragma omp critical
510</pre>
511
512<p>to define a section of code in your callback update method that must be executed by a single thread at a time.</p>
513
514<p>The format of the UpdateWandViewIterator method is:</p>
515
516<pre class="text">
517MagickBooleanType UpdateWandViewIterator(WandView *source,
518 UpdateWandViewMethod update,void *context)
519</pre>
520
521<p>A description of each parameter follows:</p>
522
523<dd>
524</dd>
525
526<dd> </dd>
527<dl class="dl-horizontal">
528<dt>source</dt>
529<dd>the source wand view. </dd>
530
531<dd> </dd>
532<dt>update</dt>
533<dd>the update callback method. </dd>
534
535<dd> </dd>
536<dt>context</dt>
537<dd>the user defined context. </dd>
538
539<dd> </dd>
540</dl>
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