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216
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]217<h1>Module constitute Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]218<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 +0000[diff] [blame]219
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]220<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="ConstituteImage">ConstituteImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]221<div class="doc-section">
222
223<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>
224
225<pre class="text">
226 image = ConstituteImage(640,480,"RGB",CharPixel,pixels,&exception);
227</pre>
228
229<p>The format of the ConstituteImage method is:</p>
230
231<pre class="code">
232 Image *ConstituteImage(const size_t columns,const size_t rows,
233 const char *map,const StorageType storage,const void *pixels,
234 ExceptionInfo *exception)
235</pre>
236
237<p>A description of each parameter follows:</p>
238
239<h5>columns</h5>
240<p>width in pixels of the image.</p>
241
242<h5>rows</h5>
243<p>height in pixels of the image.</p>
244
245<h5>map</h5>
246<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>
247
248<h5>storage</h5>
249<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>
250
251<h5>pixels</h5>
252<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>
253
254<h5>exception</h5>
255<p>return any errors or warnings in this structure.</p>
256
257 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]258<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="PingImage">PingImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]259<div class="doc-section">
260
261<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>
262
263<p>The format of the PingImage method is:</p>
264
265<pre class="code">
266 Image *PingImage(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>Ping the image defined by the file or filename members of this structure.</p>
273
274<h5>exception</h5>
275<p>return any errors or warnings in this structure.</p>
276
277 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]278<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="PingImages">PingImages</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]279<div class="doc-section">
280
281<p>PingImages() pings one or more images and returns them as an image list.</p>
282
283<p>The format of the PingImage method is:</p>
284
285<pre class="code">
286 Image *PingImages(const ImageInfo *image_info,ExceptionInfo *exception)
287</pre>
288
289<p>A description of each parameter follows:</p>
290
291<h5>image_info</h5>
292<p>the image info.</p>
293
294<h5>exception</h5>
295<p>return any errors or warnings in this structure.</p>
296
297 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]298<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="ReadImage">ReadImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]299<div class="doc-section">
300
301<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>
302
303<p>The format of the ReadImage method is:</p>
304
305<pre class="code">
306 Image *ReadImage(const ImageInfo *image_info,ExceptionInfo *exception)
307</pre>
308
309<p>A description of each parameter follows:</p>
310
311<h5>image_info</h5>
312<p>Read the image defined by the file or filename members of this structure.</p>
313
314<h5>exception</h5>
315<p>return any errors or warnings in this structure.</p>
316
317 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]318<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="ReadImages">ReadImages</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]319<div class="doc-section">
320
321<p>ReadImages() reads one or more images and returns them as an image list.</p>
322
323<p>The format of the ReadImage method is:</p>
324
325<pre class="code">
326 Image *ReadImages(const ImageInfo *image_info,ExceptionInfo *exception)
327</pre>
328
329<p>A description of each parameter follows:</p>
330
331<h5>image_info</h5>
332<p>the image info.</p>
333
334<h5>exception</h5>
335<p>return any errors or warnings in this structure.</p>
336
337 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]338<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="WriteImage">WriteImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]339<div class="doc-section">
340
341<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>
342
343<p>The format of the WriteImage method is:</p>
344
345<pre class="code">
346 MagickBooleanType WriteImage(const ImageInfo *image_info,Image *image)
347</pre>
348
349<p>A description of each parameter follows:</p>
350
351<h5>image_info</h5>
352<p>the image info.</p>
353
354<h5>image</h5>
355<p>the image.</p>
356
357 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]358<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="WriteImages">WriteImages</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]359<div class="doc-section">
360
361<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>
362
363<p>The format of the WriteImages method is:</p>
364
365<pre class="code">
366 MagickBooleanType WriteImages(const ImageInfo *image_info,Image *images,
367 const char *filename,ExceptionInfo *exception)
368</pre>
369
370<p>A description of each parameter follows:</p>
371
372<h5>image_info</h5>
373<p>the image info.</p>
374
375<h5>images</h5>
376<p>the image list.</p>
377
378<h5>filename</h5>
379<p>the image filename.</p>
380
381<h5>exception</h5>
382<p>return any errors or warnings in this structure.</p>
383
384 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]385
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