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8    <title>ImageMagick: MagickWand, C API for ImageMagick: Pixel Iterator Methods</title>
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59<p class="text-center"><a href="pixel-iterator.html#ClearPixelIterator">ClearPixelIterator</a> &#8226; <a href="pixel-iterator.html#ClonePixelIterator">ClonePixelIterator</a> &#8226; <a href="pixel-iterator.html#DestroyPixelIterator">DestroyPixelIterator</a> &#8226; <a href="pixel-iterator.html#IsPixelIterator">IsPixelIterator</a> &#8226; <a href="pixel-iterator.html#NewPixelIterator">NewPixelIterator</a> &#8226; <a href="pixel-iterator.html#PixelClearIteratorException">PixelClearIteratorException</a> &#8226; <a href="pixel-iterator.html#NewPixelRegionIterator">NewPixelRegionIterator</a> &#8226; <a href="pixel-iterator.html#PixelGetCurrentIteratorRow">PixelGetCurrentIteratorRow</a> &#8226; <a href="pixel-iterator.html#PixelGetIteratorException">PixelGetIteratorException</a> &#8226; <a href="pixel-iterator.html#PixelGetIteratorExceptionType">PixelGetIteratorExceptionType</a> &#8226; <a href="pixel-iterator.html#PixelGetIteratorRow">PixelGetIteratorRow</a> &#8226; <a href="pixel-iterator.html#PixelGetNextIteratorRow">PixelGetNextIteratorRow</a> &#8226; <a href="pixel-iterator.html#PixelGetPreviousIteratorRow">PixelGetPreviousIteratorRow</a> &#8226; <a href="pixel-iterator.html#PixelResetIterator">PixelResetIterator</a> &#8226; <a href="pixel-iterator.html#PixelSetFirstIteratorRow">PixelSetFirstIteratorRow</a> &#8226; <a href="pixel-iterator.html#PixelSetIteratorRow">PixelSetIteratorRow</a> &#8226; <a href="pixel-iterator.html#PixelSetLastIteratorRow">PixelSetLastIteratorRow</a> &#8226; <a href="pixel-iterator.html#PixelSyncIterator">PixelSyncIterator</a></p>
60
61<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="ClearPixelIterator">ClearPixelIterator</a></h2>
62
63<p>ClearPixelIterator() clear resources associated with a PixelIterator.</p>
64
65<p>The format of the ClearPixelIterator method is:</p>
66
67<pre class="text">
68void ClearPixelIterator(PixelIterator *iterator)
69</pre>
70
71<p>A description of each parameter follows:</p>
72
73<dd>
74</dd>
75
76<dd> </dd>
77<dl class="dl-horizontal">
78<dt>iterator</dt>
79<dd>the pixel iterator. </dd>
80
81<dd>  </dd>
82</dl>
83<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="ClonePixelIterator">ClonePixelIterator</a></h2>
84
85<p>ClonePixelIterator() makes an exact copy of the specified iterator.</p>
86
87<p>The format of the ClonePixelIterator method is:</p>
88
89<pre class="text">
90PixelIterator *ClonePixelIterator(const PixelIterator *iterator)
91</pre>
92
93<p>A description of each parameter follows:</p>
94
95<dd>
96</dd>
97
98<dd> </dd>
99<dl class="dl-horizontal">
100<dt>iterator</dt>
101<dd>the magick iterator. </dd>
102
103<dd>  </dd>
104</dl>
105<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="DestroyPixelIterator">DestroyPixelIterator</a></h2>
106
107<p>DestroyPixelIterator() deallocates resources associated with a PixelIterator.</p>
108
109<p>The format of the DestroyPixelIterator method is:</p>
110
111<pre class="text">
112PixelIterator *DestroyPixelIterator(PixelIterator *iterator)
113</pre>
114
115<p>A description of each parameter follows:</p>
116
117<dd>
118</dd>
119
120<dd> </dd>
121<dl class="dl-horizontal">
122<dt>iterator</dt>
123<dd>the pixel iterator. </dd>
124
125<dd>  </dd>
126</dl>
127<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="IsPixelIterator">IsPixelIterator</a></h2>
128
129<p>IsPixelIterator() returns MagickTrue if the iterator is verified as a pixel iterator.</p>
130
131<p>The format of the IsPixelIterator method is:</p>
132
133<pre class="text">
134MagickBooleanType IsPixelIterator(const PixelIterator *iterator)
135</pre>
136
137<p>A description of each parameter follows:</p>
138
139<dd>
140</dd>
141
142<dd> </dd>
143<dl class="dl-horizontal">
144<dt>iterator</dt>
145<dd>the magick iterator. </dd>
146
147<dd>  </dd>
148</dl>
149<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="NewPixelIterator">NewPixelIterator</a></h2>
150
151<p>NewPixelIterator() returns a new pixel iterator.</p>
152
153<p>The format of the NewPixelIterator method is:</p>
154
155<pre class="text">
156PixelIterator *NewPixelIterator(MagickWand *wand)
157</pre>
158
159<p>A description of each parameter follows:</p>
160
161<dd>
162</dd>
163
164<dd> </dd>
165<dl class="dl-horizontal">
166<dt>wand</dt>
167<dd>the magick wand. </dd>
168
169<dd>  </dd>
170</dl>
171<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelClearIteratorException">PixelClearIteratorException</a></h2>
172
173<p>PixelClearIteratorException() clear any exceptions associated with the iterator.</p>
174
175<p>The format of the PixelClearIteratorException method is:</p>
176
177<pre class="text">
178MagickBooleanType PixelClearIteratorException(PixelIterator *iterator)
179</pre>
180
181<p>A description of each parameter follows:</p>
182
183<dd>
184</dd>
185
186<dd> </dd>
187<dl class="dl-horizontal">
188<dt>iterator</dt>
189<dd>the pixel iterator. </dd>
190
191<dd>  </dd>
192</dl>
193<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="NewPixelRegionIterator">NewPixelRegionIterator</a></h2>
194
195<p>NewPixelRegionIterator() returns a new pixel iterator.</p>
196
197<p>The format of the NewPixelRegionIterator method is:</p>
198
199<pre class="text">
200PixelIterator *NewPixelRegionIterator(MagickWand *wand,const ssize_t x,
201  const ssize_t y,const size_t width,const size_t height)
202</pre>
203
204<p>A description of each parameter follows:</p>
205
206<dd>
207</dd>
208
209<dd> </dd>
210<dl class="dl-horizontal">
211<dt>wand</dt>
212<dd>the magick wand. </dd>
213
214<dd> </dd>
215<dt>x,y,columns,rows</dt>
216<dd> These values define the perimeter of a region of pixels. </dd>
217
218<dd>  </dd>
219</dl>
220<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelGetCurrentIteratorRow">PixelGetCurrentIteratorRow</a></h2>
221
222<p>PixelGetCurrentIteratorRow() returns the current row as an array of pixel wands from the pixel iterator.</p>
223
224<p>The format of the PixelGetCurrentIteratorRow method is:</p>
225
226<pre class="text">
227PixelWand **PixelGetCurrentIteratorRow(PixelIterator *iterator,
228  size_t *number_wands)
229</pre>
230
231<p>A description of each parameter follows:</p>
232
233<dd>
234</dd>
235
236<dd> </dd>
237<dl class="dl-horizontal">
238<dt>iterator</dt>
239<dd>the pixel iterator. </dd>
240
241<dd> </dd>
242<dt>number_wands</dt>
243<dd>the number of pixel wands. </dd>
244
245<dd>  </dd>
246</dl>
247<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelGetIteratorException">PixelGetIteratorException</a></h2>
248
249<p>PixelGetIteratorException() returns the severity, reason, and description of any error that occurs when using other methods in this API.</p>
250
251<p>The format of the PixelGetIteratorException method is:</p>
252
253<pre class="text">
254char *PixelGetIteratorException(const PixelIterator *iterator,
255  ExceptionType *severity)
256</pre>
257
258<p>A description of each parameter follows:</p>
259
260<dd>
261</dd>
262
263<dd> </dd>
264<dl class="dl-horizontal">
265<dt>iterator</dt>
266<dd>the pixel iterator. </dd>
267
268<dd> </dd>
269<dt>severity</dt>
270<dd>the severity of the error is returned here. </dd>
271
272<dd>  </dd>
273</dl>
274<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelGetIteratorExceptionType">PixelGetIteratorExceptionType</a></h2>
275
276<p>PixelGetIteratorExceptionType() the exception type associated with the iterator.  If no exception has occurred, UndefinedExceptionType is returned.</p>
277
278<p>The format of the PixelGetIteratorExceptionType method is:</p>
279
280<pre class="text">
281ExceptionType PixelGetIteratorExceptionType(
282  const PixelIterator *iterator)
283</pre>
284
285<p>A description of each parameter follows:</p>
286
287<dd>
288</dd>
289
290<dd> </dd>
291<dl class="dl-horizontal">
292<dt>iterator</dt>
293<dd>the pixel iterator. </dd>
294
295<dd>  </dd>
296</dl>
297<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelGetIteratorRow">PixelGetIteratorRow</a></h2>
298
299<p>PixelGetIteratorRow() returns the current pixel iterator row.</p>
300
301<p>The format of the PixelGetIteratorRow method is:</p>
302
303<pre class="text">
304MagickBooleanType PixelGetIteratorRow(PixelIterator *iterator)
305</pre>
306
307<p>A description of each parameter follows:</p>
308
309<dd>
310</dd>
311
312<dd> </dd>
313<dl class="dl-horizontal">
314<dt>iterator</dt>
315<dd>the pixel iterator. </dd>
316
317<dd>  </dd>
318</dl>
319<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelGetNextIteratorRow">PixelGetNextIteratorRow</a></h2>
320
321<p>PixelGetNextIteratorRow() returns the next row as an array of pixel wands from the pixel iterator.</p>
322
323<p>The format of the PixelGetNextIteratorRow method is:</p>
324
325<pre class="text">
326PixelWand **PixelGetNextIteratorRow(PixelIterator *iterator,
327  size_t *number_wands)
328</pre>
329
330<p>A description of each parameter follows:</p>
331
332<dd>
333</dd>
334
335<dd> </dd>
336<dl class="dl-horizontal">
337<dt>iterator</dt>
338<dd>the pixel iterator. </dd>
339
340<dd> </dd>
341<dt>number_wands</dt>
342<dd>the number of pixel wands. </dd>
343
344<dd>  </dd>
345</dl>
346<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelGetPreviousIteratorRow">PixelGetPreviousIteratorRow</a></h2>
347
348<p>PixelGetPreviousIteratorRow() returns the previous row as an array of pixel wands from the pixel iterator.</p>
349
350<p>The format of the PixelGetPreviousIteratorRow method is:</p>
351
352<pre class="text">
353PixelWand **PixelGetPreviousIteratorRow(PixelIterator *iterator,
354  size_t *number_wands)
355</pre>
356
357<p>A description of each parameter follows:</p>
358
359<dd>
360</dd>
361
362<dd> </dd>
363<dl class="dl-horizontal">
364<dt>iterator</dt>
365<dd>the pixel iterator. </dd>
366
367<dd> </dd>
368<dt>number_wands</dt>
369<dd>the number of pixel wands. </dd>
370
371<dd>  </dd>
372</dl>
373<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelResetIterator">PixelResetIterator</a></h2>
374
375<p>PixelResetIterator() resets the pixel iterator.  Use it in conjunction with PixelGetNextIteratorRow() to iterate over all the pixels in a pixel container.</p>
376
377<p>The format of the PixelResetIterator method is:</p>
378
379<pre class="text">
380void PixelResetIterator(PixelIterator *iterator)
381</pre>
382
383<p>A description of each parameter follows:</p>
384
385<dd>
386</dd>
387
388<dd> </dd>
389<dl class="dl-horizontal">
390<dt>iterator</dt>
391<dd>the pixel iterator. </dd>
392
393<dd>  </dd>
394</dl>
395<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelSetFirstIteratorRow">PixelSetFirstIteratorRow</a></h2>
396
397<p>PixelSetFirstIteratorRow() sets the pixel iterator to the first pixel row.</p>
398
399<p>The format of the PixelSetFirstIteratorRow method is:</p>
400
401<pre class="text">
402void PixelSetFirstIteratorRow(PixelIterator *iterator)
403</pre>
404
405<p>A description of each parameter follows:</p>
406
407<dd>
408</dd>
409
410<dd> </dd>
411<dl class="dl-horizontal">
412<dt>iterator</dt>
413<dd>the magick iterator. </dd>
414
415<dd>  </dd>
416</dl>
417<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelSetIteratorRow">PixelSetIteratorRow</a></h2>
418
419<p>PixelSetIteratorRow() set the pixel iterator row.</p>
420
421<p>The format of the PixelSetIteratorRow method is:</p>
422
423<pre class="text">
424MagickBooleanType PixelSetIteratorRow(PixelIterator *iterator,
425  const ssize_t row)
426</pre>
427
428<p>A description of each parameter follows:</p>
429
430<dd>
431</dd>
432
433<dd> </dd>
434<dl class="dl-horizontal">
435<dt>iterator</dt>
436<dd>the pixel iterator. </dd>
437
438<dd>  </dd>
439</dl>
440<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelSetLastIteratorRow">PixelSetLastIteratorRow</a></h2>
441
442<p>PixelSetLastIteratorRow() sets the pixel iterator to the last pixel row.</p>
443
444<p>The format of the PixelSetLastIteratorRow method is:</p>
445
446<pre class="text">
447void PixelSetLastIteratorRow(PixelIterator *iterator)
448</pre>
449
450<p>A description of each parameter follows:</p>
451
452<dd>
453</dd>
454
455<dd> </dd>
456<dl class="dl-horizontal">
457<dt>iterator</dt>
458<dd>the magick iterator. </dd>
459
460<dd>  </dd>
461</dl>
462<h2><a href="http://www.imagemagick.org/api/MagickWand/pixel-iterator_8c.html" id="PixelSyncIterator">PixelSyncIterator</a></h2>
463
464<p>PixelSyncIterator() syncs the pixel iterator.</p>
465
466<p>The format of the PixelSyncIterator method is:</p>
467
468<pre class="text">
469MagickBooleanType PixelSyncIterator(PixelIterator *iterator)
470</pre>
471
472<p>A description of each parameter follows:</p>
473
474<dd>
475</dd>
476
477<dd> </dd>
478<dl class="dl-horizontal">
479<dt>iterator</dt>
480<dd>the pixel iterator. </dd>
481
482<dd>  </dd>
483</dl>
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