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214
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]215<h1>Module constitute Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]216<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]217
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]218<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]219<div class="doc-section">
220
221<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>
222
223<pre class="text">
224 image = ConstituteImage(640,480,"RGB",CharPixel,pixels,&exception);
225</pre>
226
227<p>The format of the ConstituteImage method is:</p>
228
229<pre class="code">
230 Image *ConstituteImage(const size_t columns,const size_t rows,
231 const char *map,const StorageType storage,const void *pixels,
232 ExceptionInfo *exception)
233</pre>
234
235<p>A description of each parameter follows:</p>
236
237<h5>columns</h5>
238<p>width in pixels of the image.</p>
239
240<h5>rows</h5>
241<p>height in pixels of the image.</p>
242
243<h5>map</h5>
244<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>
245
246<h5>storage</h5>
247<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>
248
249<h5>pixels</h5>
250<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>
251
252<h5>exception</h5>
253<p>return any errors or warnings in this structure.</p>
254
255 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]256<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]257<div class="doc-section">
258
259<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>
260
261<p>The format of the PingImage method is:</p>
262
263<pre class="code">
264 Image *PingImage(const ImageInfo *image_info,ExceptionInfo *exception)
265</pre>
266
267<p>A description of each parameter follows:</p>
268
269<h5>image_info</h5>
270<p>Ping the image defined by the file or filename members of this structure.</p>
271
272<h5>exception</h5>
273<p>return any errors or warnings in this structure.</p>
274
275 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]276<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]277<div class="doc-section">
278
279<p>PingImages() pings one or more images and returns them as an image list.</p>
280
281<p>The format of the PingImage method is:</p>
282
283<pre class="code">
284 Image *PingImages(const ImageInfo *image_info,ExceptionInfo *exception)
285</pre>
286
287<p>A description of each parameter follows:</p>
288
289<h5>image_info</h5>
290<p>the image info.</p>
291
292<h5>exception</h5>
293<p>return any errors or warnings in this structure.</p>
294
295 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]296<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]297<div class="doc-section">
298
299<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>
300
301<p>The format of the ReadImage method is:</p>
302
303<pre class="code">
304 Image *ReadImage(const ImageInfo *image_info,ExceptionInfo *exception)
305</pre>
306
307<p>A description of each parameter follows:</p>
308
309<h5>image_info</h5>
310<p>Read the image defined by the file or filename members of this structure.</p>
311
312<h5>exception</h5>
313<p>return any errors or warnings in this structure.</p>
314
315 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]316<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]317<div class="doc-section">
318
319<p>ReadImages() reads one or more images and returns them as an image list.</p>
320
321<p>The format of the ReadImage method is:</p>
322
323<pre class="code">
324 Image *ReadImages(const ImageInfo *image_info,ExceptionInfo *exception)
325</pre>
326
327<p>A description of each parameter follows:</p>
328
329<h5>image_info</h5>
330<p>the image info.</p>
331
332<h5>exception</h5>
333<p>return any errors or warnings in this structure.</p>
334
335 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]336<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]337<div class="doc-section">
338
339<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>
340
341<p>The format of the WriteImage method is:</p>
342
343<pre class="code">
344 MagickBooleanType WriteImage(const ImageInfo *image_info,Image *image)
345</pre>
346
347<p>A description of each parameter follows:</p>
348
349<h5>image_info</h5>
350<p>the image info.</p>
351
352<h5>image</h5>
353<p>the image.</p>
354
355 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]356<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]357<div class="doc-section">
358
359<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>
360
361<p>The format of the WriteImages method is:</p>
362
363<pre class="code">
364 MagickBooleanType WriteImages(const ImageInfo *image_info,Image *images,
365 const char *filename,ExceptionInfo *exception)
366</pre>
367
368<p>A description of each parameter follows:</p>
369
370<h5>image_info</h5>
371<p>the image info.</p>
372
373<h5>images</h5>
374<p>the image list.</p>
375
376<h5>filename</h5>
377<p>the image filename.</p>
378
379<h5>exception</h5>
380<p>return any errors or warnings in this structure.</p>
381
382 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]383
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