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217
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]218<h1>Module constitute Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]219<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]220
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]221<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]222<div class="doc-section">
223
224<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>
225
226<pre class="text">
227 image = ConstituteImage(640,480,"RGB",CharPixel,pixels,&exception);
228</pre>
229
230<p>The format of the ConstituteImage method is:</p>
231
232<pre class="code">
233 Image *ConstituteImage(const size_t columns,const size_t rows,
234 const char *map,const StorageType storage,const void *pixels,
235 ExceptionInfo *exception)
236</pre>
237
238<p>A description of each parameter follows:</p>
239
240<h5>columns</h5>
241<p>width in pixels of the image.</p>
242
243<h5>rows</h5>
244<p>height in pixels of the image.</p>
245
246<h5>map</h5>
247<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>
248
249<h5>storage</h5>
250<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>
251
252<h5>pixels</h5>
253<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>
254
255<h5>exception</h5>
256<p>return any errors or warnings in this structure.</p>
257
258 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]259<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]260<div class="doc-section">
261
262<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>
263
264<p>The format of the PingImage method is:</p>
265
266<pre class="code">
267 Image *PingImage(const ImageInfo *image_info,ExceptionInfo *exception)
268</pre>
269
270<p>A description of each parameter follows:</p>
271
272<h5>image_info</h5>
273<p>Ping the image defined by the file or filename members of this structure.</p>
274
275<h5>exception</h5>
276<p>return any errors or warnings in this structure.</p>
277
278 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]279<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]280<div class="doc-section">
281
282<p>PingImages() pings one or more images and returns them as an image list.</p>
283
284<p>The format of the PingImage method is:</p>
285
286<pre class="code">
287 Image *PingImages(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>the image info.</p>
294
295<h5>exception</h5>
296<p>return any errors or warnings in this structure.</p>
297
298 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]299<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]300<div class="doc-section">
301
302<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>
303
304<p>The format of the ReadImage method is:</p>
305
306<pre class="code">
307 Image *ReadImage(const ImageInfo *image_info,ExceptionInfo *exception)
308</pre>
309
310<p>A description of each parameter follows:</p>
311
312<h5>image_info</h5>
313<p>Read the image defined by the file or filename members of this structure.</p>
314
315<h5>exception</h5>
316<p>return any errors or warnings in this structure.</p>
317
318 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]319<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]320<div class="doc-section">
321
322<p>ReadImages() reads one or more images and returns them as an image list.</p>
323
324<p>The format of the ReadImage method is:</p>
325
326<pre class="code">
327 Image *ReadImages(const ImageInfo *image_info,ExceptionInfo *exception)
328</pre>
329
330<p>A description of each parameter follows:</p>
331
332<h5>image_info</h5>
333<p>the image info.</p>
334
335<h5>exception</h5>
336<p>return any errors or warnings in this structure.</p>
337
338 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]339<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]340<div class="doc-section">
341
342<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>
343
344<p>The format of the WriteImage method is:</p>
345
346<pre class="code">
347 MagickBooleanType WriteImage(const ImageInfo *image_info,Image *image)
348</pre>
349
350<p>A description of each parameter follows:</p>
351
352<h5>image_info</h5>
353<p>the image info.</p>
354
355<h5>image</h5>
356<p>the image.</p>
357
358 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]359<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]360<div class="doc-section">
361
362<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>
363
364<p>The format of the WriteImages method is:</p>
365
366<pre class="code">
367 MagickBooleanType WriteImages(const ImageInfo *image_info,Image *images,
368 const char *filename,ExceptionInfo *exception)
369</pre>
370
371<p>A description of each parameter follows:</p>
372
373<h5>image_info</h5>
374<p>the image info.</p>
375
376<h5>images</h5>
377<p>the image list.</p>
378
379<h5>filename</h5>
380<p>the image filename.</p>
381
382<h5>exception</h5>
383<p>return any errors or warnings in this structure.</p>
384
385 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]386
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