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cristyffb69ed2010-12-25 00:06:48 +0000[diff] [blame]11 <title>ImageMagick: MagickCore, C API for ImageMagick: Draw on an Image</title>
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212<div class="main">
213
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]214<h1>Module draw Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]215<p class="navigation-index">[<a href="#AcquireDrawInfo">AcquireDrawInfo</a> &bull; <a href="#CloneDrawInfo">CloneDrawInfo</a> &bull; <a href="#DestroyDrawInfo">DestroyDrawInfo</a> &bull; <a href="#DrawAffineImage">DrawAffineImage</a> &bull; <a href="#DrawClipPath">DrawClipPath</a> &bull; <a href="#DrawImage">DrawImage</a> &bull; <a href="#DrawGradientImage">DrawGradientImage</a> &bull; <a href="#DrawPatternPath">DrawPatternPath</a> &bull; <a href="#DrawPrimitive">DrawPrimitive</a> &bull; <a href="#GetAffineMatrix">GetAffineMatrix</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]216
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]217<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="AcquireDrawInfo">AcquireDrawInfo</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]218<div class="doc-section">
219
220<p>AcquireDrawInfo() returns a DrawInfo structure properly initialized.</p>
221
222<p>The format of the AcquireDrawInfo method is:</p>
223
224<pre class="code">
225 DrawInfo *AcquireDrawInfo(void)
226</pre>
227
228 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]229<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="CloneDrawInfo">CloneDrawInfo</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]230<div class="doc-section">
231
232<p>CloneDrawInfo() makes a copy of the given draw info structure. If NULL is specified, a new image info structure is created initialized to default values.</p>
233
234<p>The format of the CloneDrawInfo method is:</p>
235
236<pre class="code">
237 DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
238 const DrawInfo *draw_info)
239</pre>
240
241<p>A description of each parameter follows:</p>
242
243<h5>image_info</h5>
244<p>the image info.</p>
245
246<h5>draw_info</h5>
247<p>the draw info.</p>
248
249 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]250<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="DestroyDrawInfo">DestroyDrawInfo</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]251<div class="doc-section">
252
253<p>DestroyDrawInfo() deallocates memory associated with an DrawInfo structure.</p>
254
255<p>The format of the DestroyDrawInfo method is:</p>
256
257<pre class="code">
258 DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
259</pre>
260
261<p>A description of each parameter follows:</p>
262
263<h5>draw_info</h5>
264<p>the draw info.</p>
265
266 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]267<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="DrawAffineImage">DrawAffineImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]268<div class="doc-section">
269
270<p>DrawAffineImage() composites the source over the destination image as dictated by the affine transform.</p>
271
272<p>The format of the DrawAffineImage method is:</p>
273
274<pre class="code">
275 MagickBooleanType DrawAffineImage(Image *image,const Image *source,
276 const AffineMatrix *affine)
277</pre>
278
279<p>A description of each parameter follows:</p>
280
281<h5>image</h5>
282<p>the image.</p>
283
284<h5>source</h5>
285<p>the source image.</p>
286
287<h5>affine</h5>
288<p>the affine transform.</p>
289
290 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]291<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="DrawClipPath">DrawClipPath</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]292<div class="doc-section">
293
294<p>DrawClipPath() draws the clip path on the image mask.</p>
295
296<p>The format of the DrawClipPath method is:</p>
297
298<pre class="code">
299 MagickBooleanType DrawClipPath(Image *image,const DrawInfo *draw_info,
300 const char *name)
301</pre>
302
303<p>A description of each parameter follows:</p>
304
305<h5>image</h5>
306<p>the image.</p>
307
308<h5>draw_info</h5>
309<p>the draw info.</p>
310
311<h5>name</h5>
312<p>the name of the clip path.</p>
313
314 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]315<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="DrawImage">DrawImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]316<div class="doc-section">
317
318<p>DrawImage() draws a graphic primitive on your image. The primitive may be represented as a string or filename. Precede the filename with an "at" sign (@) and the contents of the file are drawn on the image. You can affect how text is drawn by setting one or more members of the draw info structure.</p>
319
320<p>The format of the DrawImage method is:</p>
321
322<pre class="code">
323 MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
324</pre>
325
326<p>A description of each parameter follows:</p>
327
328<h5>image</h5>
329<p>the image.</p>
330
331<h5>draw_info</h5>
332<p>the draw info.</p>
333
334 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]335<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="DrawGradientImage">DrawGradientImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]336<div class="doc-section">
337
338<p>DrawGradientImage() draws a linear gradient on the image.</p>
339
340<p>The format of the DrawGradientImage method is:</p>
341
342<pre class="code">
343 MagickBooleanType DrawGradientImage(Image *image,
344 const DrawInfo *draw_info)
345</pre>
346
347<p>A description of each parameter follows:</p>
348
349<h5>image</h5>
350<p>the image.</p>
351
352<h5>_info</h5>
353<p>the draw info.</p>
354
355 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]356<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="DrawPatternPath">DrawPatternPath</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]357<div class="doc-section">
358
359<p>DrawPatternPath() draws a pattern.</p>
360
361<p>The format of the DrawPatternPath method is:</p>
362
363<pre class="code">
364 MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info,
365 const char *name,Image **pattern)
366</pre>
367
368<p>A description of each parameter follows:</p>
369
370<h5>image</h5>
371<p>the image.</p>
372
373<h5>draw_info</h5>
374<p>the draw info.</p>
375
376<h5>name</h5>
377<p>the pattern name.</p>
378
379<h5>image</h5>
380<p>the image.</p>
381
382 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]383<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="DrawPrimitive">DrawPrimitive</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]384<div class="doc-section">
385
386<p>DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.</p>
387
388<p>The format of the DrawPrimitive method is:</p>
389
390<pre class="code">
391 MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info,
392 PrimitiveInfo *primitive_info)
393</pre>
394
395<p>A description of each parameter follows:</p>
396
397<h5>image</h5>
398<p>the image.</p>
399
400<h5>draw_info</h5>
401<p>the draw info.</p>
402
403<h5>primitive_info</h5>
404<p>Specifies a pointer to a PrimitiveInfo structure.</p>
405
406 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]407<h2><a href="http://www.imagemagick.org/api/MagickCore/draw_8c.html" id="GetAffineMatrix">GetAffineMatrix</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]408<div class="doc-section">
409
410<p>GetAffineMatrix() returns an AffineMatrix initialized to the identity matrix.</p>
411
412<p>The format of the GetAffineMatrix method is:</p>
413
414<pre class="code">
415 void GetAffineMatrix(AffineMatrix *affine_matrix)
416</pre>
417
418<p>A description of each parameter follows:</p>
419
420<h5>affine_matrix</h5>
421<p>the affine matrix.</p>
422
423 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]424
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