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11 <title>ImageMagick: MagickCore, C API for ImageMagick: Composite an Image</title>
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cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]151<p class="navigation-index">[<a href="#CompositeImageChannel">CompositeImageChannel</a>]</p>
152
153<h2><a href="http://www.imagemagick.org/api/MagickCore/composite
154_8c.html" target="source" name="CompositeImageChannel">CompositeImageChannel</a></h2>
155<div class="doc-section">
156
157<p>CompositeImageChannel() returns the second image composited onto the first at the specified offset, using the specified composite method.</p></ol>
158
159<p>The format of the CompositeImageChannel method is:</p>
160
161<pre class="code">
162 MagickBooleanType CompositeImage(Image *image,
163 const CompositeOperator compose,Image *composite_image,
164 const long x_offset,const long y_offset)
165 MagickBooleanType CompositeImageChannel(Image *image,
166 const ChannelType channel,const CompositeOperator compose,
167 Image *composite_image,const long x_offset,const long y_offset)
168</pre>
169
170<p>A description of each parameter follows:</p></ol>
171
172<h5>image</h5>
173<ol><p>the destination image, modified by he composition</p></ol>
174
175<h5>channel</h5>
176<ol><p>the channel.</p></ol>
177
178<h5>compose</h5>
179<ol><p>This operator affects how the composite is applied to the image. The operators and how they are utilized are listed here http://www.w3.org/TR/SVG12/#compositing.</p></ol>
180
181<h5>composite_image</h5>
182<ol><p>the composite (source) image.</p></ol>
183
184<h5>x_offset</h5>
185<ol><p>the column offset of the composited image.</p></ol>
186
187<h5>y_offset</h5>
188<ol><p>the row offset of the composited image.</p></ol>
189
190<p>Extra Controls from Image meta-data in 'composite_image' (artifacts)</p></ol>
191
192<p>o "compose:args" A string containing extra numerical arguments for specific compose methods, generally expressed as a 'geometry' or a comma separated list of numbers.</p></ol>
193
194<p>Compose methods needing such arguments include "BlendCompositeOp" and "DisplaceCompositeOp".</p></ol>
195
196<p>o "compose:outside-overlay" Modify how the composition is to effect areas not directly covered by the 'composite_image' at the offset given. Normally this is dependant on the 'compose' method, especially Duff-Porter methods.</p></ol>
197
198<p>If set to "false" then disable all normal handling of pixels not covered by the composite_image. Typically used for repeated tiling of the composite_image by the calling API.</p></ol>
199
200<p>Previous to IM v6.5.3-3 this was called "modify-outside-overlay"</p></ol>
201
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