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192
cristy6f77f692011-02-15 15:31:39 +0000193<h1>Module constitute
194 Methods</h1>
195<p class="navigation-index">[<a href="#ConstituteImage">ConstituteImage</a> &bull; <a href="#PingImage">PingImage</a> &bull; <a href="#PingImages">PingImages</a> &bull; <a href="#ReadImage">ReadImage</a> &bull; <a href="#ReadImages">ReadImages</a> &bull; <a href="#WriteImage">WriteImage</a> &bull; <a href="#WriteImages">WriteImages</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000196
cristy6f77f692011-02-15 15:31:39 +0000197<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute
198_8c.html" id="ConstituteImage">ConstituteImage</a></h2>
199<div class="doc-section">
200
201<p>ConstituteImage() returns an image from the pixel data you supply. The pixel data must be in scanline order top-to-bottom. The data can be char, short int, int, float, or double. Float and double require the pixels to be normalized [0..1], otherwise [0..QuantumRange]. For example, to create a 640x480 image from unsigned red-green-blue character data, use:</p>
202
203<pre class="text">
204 image = ConstituteImage(640,480,"RGB",CharPixel,pixels,&exception);
205</pre>
206
207<p>The format of the ConstituteImage method is:</p>
208
209<pre class="code">
210 Image *ConstituteImage(const size_t columns,const size_t rows,
211 const char *map,const StorageType storage,const void *pixels,
212 ExceptionInfo *exception)
213</pre>
214
215<p>A description of each parameter follows:</p>
216
217<h5>columns</h5>
218<p>width in pixels of the image.</p>
219
220<h5>rows</h5>
221<p>height in pixels of the image.</p>
222
223<h5>map</h5>
224<p>This string reflects the expected ordering of the pixel array. It can be any combination or order of R = red, G = green, B = blue, A = alpha (0 is transparent), O = opacity (0 is opaque), C = cyan, Y = yellow, M = magenta, K = black, I = intensity (for grayscale), P = pad.</p>
225
226<h5>storage</h5>
227<p>Define the data type of the pixels. Float and double types are expected to be normalized [0..1] otherwise [0..QuantumRange]. Choose from these types: CharPixel, DoublePixel, FloatPixel, IntegerPixel, LongPixel, QuantumPixel, or ShortPixel.</p>
228
229<h5>pixels</h5>
230<p>This array of values contain the pixel components as defined by map and type. You must preallocate this array where the expected length varies depending on the values of width, height, map, and type.</p>
231
232<h5>exception</h5>
233<p>return any errors or warnings in this structure.</p>
234
235 </div>
236<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute
237_8c.html" id="PingImage">PingImage</a></h2>
238<div class="doc-section">
239
240<p>PingImage() returns all the properties of an image or image sequence except for the pixels. It is much faster and consumes far less memory than ReadImage(). On failure, a NULL image is returned and exception describes the reason for the failure.</p>
241
242<p>The format of the PingImage method is:</p>
243
244<pre class="code">
245 Image *PingImage(const ImageInfo *image_info,ExceptionInfo *exception)
246</pre>
247
248<p>A description of each parameter follows:</p>
249
250<h5>image_info</h5>
251<p>Ping the image defined by the file or filename members of this structure.</p>
252
253<h5>exception</h5>
254<p>return any errors or warnings in this structure.</p>
255
256 </div>
257<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute
258_8c.html" id="PingImages">PingImages</a></h2>
259<div class="doc-section">
260
261<p>PingImages() pings one or more images and returns them as an image list.</p>
262
263<p>The format of the PingImage method is:</p>
264
265<pre class="code">
266 Image *PingImages(const ImageInfo *image_info,ExceptionInfo *exception)
267</pre>
268
269<p>A description of each parameter follows:</p>
270
271<h5>image_info</h5>
272<p>the image info.</p>
273
274<h5>exception</h5>
275<p>return any errors or warnings in this structure.</p>
276
277 </div>
278<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute
279_8c.html" id="ReadImage">ReadImage</a></h2>
280<div class="doc-section">
281
282<p>ReadImage() reads an image or image sequence from a file or file handle. The method returns a NULL if there is a memory shortage or if the image cannot be read. On failure, a NULL image is returned and exception describes the reason for the failure.</p>
283
284<p>The format of the ReadImage method is:</p>
285
286<pre class="code">
287 Image *ReadImage(const ImageInfo *image_info,ExceptionInfo *exception)
288</pre>
289
290<p>A description of each parameter follows:</p>
291
292<h5>image_info</h5>
293<p>Read the image defined by the file or filename members of this structure.</p>
294
295<h5>exception</h5>
296<p>return any errors or warnings in this structure.</p>
297
298 </div>
299<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute
300_8c.html" id="ReadImages">ReadImages</a></h2>
301<div class="doc-section">
302
303<p>ReadImages() reads one or more images and returns them as an image list.</p>
304
305<p>The format of the ReadImage method is:</p>
306
307<pre class="code">
308 Image *ReadImages(const ImageInfo *image_info,ExceptionInfo *exception)
309</pre>
310
311<p>A description of each parameter follows:</p>
312
313<h5>image_info</h5>
314<p>the image info.</p>
315
316<h5>exception</h5>
317<p>return any errors or warnings in this structure.</p>
318
319 </div>
320<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute
321_8c.html" id="WriteImage">WriteImage</a></h2>
322<div class="doc-section">
323
324<p>WriteImage() writes an image or an image sequence to a file or file handle. If writing to a file is on disk, the name is defined by the filename member of the image structure. WriteImage() returns MagickFalse is there is a memory shortage or if the image cannot be written. Check the exception member of image to determine the cause for any failure.</p>
325
326<p>The format of the WriteImage method is:</p>
327
328<pre class="code">
329 MagickBooleanType WriteImage(const ImageInfo *image_info,Image *image)
330</pre>
331
332<p>A description of each parameter follows:</p>
333
334<h5>image_info</h5>
335<p>the image info.</p>
336
337<h5>image</h5>
338<p>the image.</p>
339
340 </div>
341<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute
342_8c.html" id="WriteImages">WriteImages</a></h2>
343<div class="doc-section">
344
345<p>WriteImages() writes an image sequence into one or more files. While WriteImage() can write an image sequence, it is limited to writing the sequence into a single file using a format which supports multiple frames. WriteImages(), however, does not have this limitation, instead it generates multiple output files if necessary (or when requested). When ImageInfo's adjoin flag is set to MagickFalse, the file name is expected to include a printf-style formatting string for the frame number (e.g. "image02d.png").</p>
346
347<p>The format of the WriteImages method is:</p>
348
349<pre class="code">
350 MagickBooleanType WriteImages(const ImageInfo *image_info,Image *images,
351 const char *filename,ExceptionInfo *exception)
352</pre>
353
354<p>A description of each parameter follows:</p>
355
356<h5>image_info</h5>
357<p>the image info.</p>
358
359<h5>images</h5>
360<p>the image list.</p>
361
362<h5>filename</h5>
363<p>the image filename.</p>
364
365<h5>exception</h5>
366<p>return any errors or warnings in this structure.</p>
367
368 </div>
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