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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.libjpegturbo.turbojpeg</a></div> |
| <h2 title="Interface TJCustomFilter" class="title">Interface TJCustomFilter</h2> |
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| <pre>public interface <span class="typeNameLabel">TJCustomFilter</span></pre> |
| <div class="block">Custom filter callback interface</div> |
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| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#customFilter(java.nio.ShortBuffer,java.awt.Rectangle,java.awt.Rectangle,int,int,org.libjpegturbo.turbojpeg.TJTransform)">customFilter</a></span>​(java.nio.ShortBuffer coeffBuffer, |
| java.awt.Rectangle bufferRegion, |
| java.awt.Rectangle planeRegion, |
| int componentID, |
| int transformID, |
| <a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a> transform)</code></th> |
| <td class="colLast"> |
| <div class="block">A callback method that can be used to modify the DCT coefficients after |
| they are losslessly transformed but before they are transcoded to a new |
| JPEG image.</div> |
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| <a id="customFilter(java.nio.ShortBuffer,java.awt.Rectangle,java.awt.Rectangle,int,int,org.libjpegturbo.turbojpeg.TJTransform)"> |
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| <h4>customFilter</h4> |
| <pre class="methodSignature">void customFilter​(java.nio.ShortBuffer coeffBuffer, |
| java.awt.Rectangle bufferRegion, |
| java.awt.Rectangle planeRegion, |
| int componentID, |
| int transformID, |
| <a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a> transform) |
| throws <a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre> |
| <div class="block">A callback method that can be used to modify the DCT coefficients after |
| they are losslessly transformed but before they are transcoded to a new |
| JPEG image. This allows for custom filters or other transformations to be |
| applied in the frequency domain.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>coeffBuffer</code> - a buffer containing transformed DCT coefficients. |
| (NOTE: this buffer is not guaranteed to be valid once the callback |
| returns, so applications wishing to hand off the DCT coefficients to |
| another method should make a copy of them within the body of the |
| callback.)</dd> |
| <dd><code>bufferRegion</code> - rectangle containing the width and height of |
| <code>coeffBuffer</code> as well as its offset relative to the component |
| plane. TurboJPEG implementations may choose to split each component plane |
| into multiple DCT coefficient buffers and call the callback method once |
| for each buffer.</dd> |
| <dd><code>planeRegion</code> - rectangle containing the width and height of the |
| component plane to which <code>coeffBuffer</code> belongs</dd> |
| <dd><code>componentID</code> - ID number of the component plane to which |
| <code>coeffBuffer</code> belongs. (Y, Cb, and Cr have, respectively, ID's |
| of 0, 1, and 2 in typical JPEG images.)</dd> |
| <dd><code>transformID</code> - ID number of the transformed image to which |
| <code>coeffBuffer</code> belongs. This is the same as the index of the |
| transform in the <code>transforms</code> array that was passed to |
| <a href="TJTransformer.html#transform(byte%5B%5D%5B%5D,org.libjpegturbo.turbojpeg.TJTransform%5B%5D)"><code>TJTransformer.transform()</code></a>.</dd> |
| <dd><code>transform</code> - a <a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg"><code>TJTransform</code></a> instance that specifies the |
| parameters and/or cropping region for this transform</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd> |
| </dl> |
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