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cristyffb69ed2010-12-25 00:06:48 +0000[diff] [blame]11 <title>ImageMagick: MagickCore, C API for ImageMagick: Paint on an Image</title>
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33 @import url("../../www/magick.css");
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199
200<div class="main">
201
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]202<h1>Module paint Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]203<p class="navigation-index">[<a href="#FloodfillPaintImage">FloodfillPaintImage</a> &bull; <a href="#OilPaintImage">OilPaintImage</a> &bull; <a href="#OpaquePaintImage">OpaquePaintImage</a> &bull; <a href="#TransparentPaintImage">TransparentPaintImage</a> &bull; <a href="#TransparentPaintImageChroma">TransparentPaintImageChroma</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]204
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]205<h2><a href="http://www.imagemagick.org/api/MagickCore/paint_8c.html" id="FloodfillPaintImage">FloodfillPaintImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]206<div class="doc-section">
207
208<p>FloodfillPaintImage() changes the color value of any pixel that matches target and is an immediate neighbor. If the method FillToBorderMethod is specified, the color value is changed for any neighbor pixel that does not match the bordercolor member of image.</p>
209
210<p>By default target must match a particular pixel color exactly. However, in many cases two colors may differ by a small amount. The fuzz member of image defines how much tolerance is acceptable to consider two colors as the same. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color for the purposes of the floodfill.</p>
211
212<p>The format of the FloodfillPaintImage method is:</p>
213
214<pre class="code">
215 MagickBooleanType FloodfillPaintImage(Image *image,
216 const ChannelType channel,const DrawInfo *draw_info,
217 const MagickPixelPacket target,const ssize_t x_offset,
218 const ssize_t y_offset,const MagickBooleanType invert)
219</pre>
220
221<p>A description of each parameter follows:</p>
222
223<h5>image</h5>
224<p>the image.</p>
225
226<h5>channel</h5>
227<p>the channel(s).</p>
228
229<h5>draw_info</h5>
230<p>the draw info.</p>
231
232<h5>target</h5>
233<p>the RGB value of the target color.</p>
234
235<h5>x_offset,y_offset</h5>
236<p>the starting location of the operation.</p>
237
238<h5>invert</h5>
239<p>paint any pixel that does not match the target color.</p>
240
241 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]242<h2><a href="http://www.imagemagick.org/api/MagickCore/paint_8c.html" id="OilPaintImage">OilPaintImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]243<div class="doc-section">
244
245<p>OilPaintImage() applies a special effect filter that simulates an oil painting. Each pixel is replaced by the most frequent color occurring in a circular region defined by radius.</p>
246
247<p>The format of the OilPaintImage method is:</p>
248
249<pre class="code">
250 Image *OilPaintImage(const Image *image,const double radius,
251 ExceptionInfo *exception)
252</pre>
253
254<p>A description of each parameter follows:</p>
255
256<h5>image</h5>
257<p>the image.</p>
258
259<h5>radius</h5>
260<p>the radius of the circular neighborhood.</p>
261
262<h5>exception</h5>
263<p>return any errors or warnings in this structure.</p>
264
265 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]266<h2><a href="http://www.imagemagick.org/api/MagickCore/paint_8c.html" id="OpaquePaintImage">OpaquePaintImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]267<div class="doc-section">
268
269<p>OpaquePaintImage() changes any pixel that matches color with the color defined by fill.</p>
270
271<p>By default color must match a particular pixel color exactly. However, in many cases two colors may differ by a small amount. Fuzz defines how much tolerance is acceptable to consider two colors as the same. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color.</p>
272
273<p>The format of the OpaquePaintImage method is:</p>
274
275<pre class="code">
276 MagickBooleanType OpaquePaintImage(Image *image,
277 const PixelPacket *target,const PixelPacket *fill,
278 const MagickBooleanType invert)
279 MagickBooleanType OpaquePaintImageChannel(Image *image,
280 const ChannelType channel,const PixelPacket *target,
281 const PixelPacket *fill,const MagickBooleanType invert)
282</pre>
283
284<p>A description of each parameter follows:</p>
285
286<h5>image</h5>
287<p>the image.</p>
288
289<h5>channel</h5>
290<p>the channel(s).</p>
291
292<h5>target</h5>
293<p>the RGB value of the target color.</p>
294
295<h5>fill</h5>
296<p>the replacement color.</p>
297
298<h5>invert</h5>
299<p>paint any pixel that does not match the target color.</p>
300
301 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]302<h2><a href="http://www.imagemagick.org/api/MagickCore/paint_8c.html" id="TransparentPaintImage">TransparentPaintImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]303<div class="doc-section">
304
305<p>TransparentPaintImage() changes the opacity value associated with any pixel that matches color to the value defined by opacity.</p>
306
307<p>By default color must match a particular pixel color exactly. However, in many cases two colors may differ by a small amount. Fuzz defines how much tolerance is acceptable to consider two colors as the same. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color.</p>
308
309<p>The format of the TransparentPaintImage method is:</p>
310
311<pre class="code">
312 MagickBooleanType TransparentPaintImage(Image *image,
313 const MagickPixelPacket *target,const Quantum opacity,
314 const MagickBooleanType invert)
315</pre>
316
317<p>A description of each parameter follows:</p>
318
319<h5>image</h5>
320<p>the image.</p>
321
322<h5>target</h5>
323<p>the target color.</p>
324
325<h5>opacity</h5>
326<p>the replacement opacity value.</p>
327
328<h5>invert</h5>
329<p>paint any pixel that does not match the target color.</p>
330
331 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]332<h2><a href="http://www.imagemagick.org/api/MagickCore/paint_8c.html" id="TransparentPaintImageChroma">TransparentPaintImageChroma</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]333<div class="doc-section">
334
335<p>TransparentPaintImageChroma() changes the opacity value associated with any pixel that matches color to the value defined by opacity.</p>
336
337<p>As there is one fuzz value for the all the channels, the TransparentPaintImage() API is not suitable for the operations like chroma, where the tolerance for similarity of two color component (RGB) can be different, Thus we define this method take two target pixels (one low and one hight) and all the pixels of an image which are lying between these two pixels are made transparent.</p>
338
339<p>The format of the TransparentPaintImage method is:</p>
340
341<pre class="code">
342 MagickBooleanType TransparentPaintImage(Image *image,
343 const MagickPixelPacket *low,const MagickPixelPacket *hight,
344 const Quantum opacity,const MagickBooleanType invert)
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>low</h5>
353<p>the low target color.</p>
354
355<h5>high</h5>
356<p>the high target color.</p>
357
358<h5>opacity</h5>
359<p>the replacement opacity value.</p>
360
361<h5>invert</h5>
362<p>paint any pixel that does not match the target color.</p>
363
364 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]365
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