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| org.libjpegturbo.turbojpeg</FONT> |
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| Interface TJCustomFilter</H2> |
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| <DT><PRE>public interface <B>TJCustomFilter</B></DL> |
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| |
| <P> |
| Custom filter callback interface |
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| <CODE> void</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../org/libjpegturbo/turbojpeg/TJCustomFilter.html#customFilter(java.nio.ShortBuffer, java.awt.Rectangle, java.awt.Rectangle, int, int, org.libjpegturbo.turbojpeg.TJTransform)">customFilter</A></B>(java.nio.ShortBuffer coeffBuffer, |
| java.awt.Rectangle bufferRegion, |
| java.awt.Rectangle planeRegion, |
| int componentID, |
| int transformID, |
| <A HREF="../../../org/libjpegturbo/turbojpeg/TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</A> transform)</CODE> |
| |
| <BR> |
| A callback function that can be used to modify the DCT coefficients after |
| they are losslessly transformed but before they are transcoded to a new |
| JPEG image.</TD> |
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| customFilter</H3> |
| <PRE> |
| void <B>customFilter</B>(java.nio.ShortBuffer coeffBuffer, |
| java.awt.Rectangle bufferRegion, |
| java.awt.Rectangle planeRegion, |
| int componentID, |
| int transformID, |
| <A HREF="../../../org/libjpegturbo/turbojpeg/TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</A> transform) |
| throws java.lang.Exception</PRE> |
| <DL> |
| <DD>A callback function 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. |
| <P> |
| <DD><DL> |
| <DT><B>Parameters:</B><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 function or library should make a copy of them within the body of |
| the callback.)<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 function once |
| for each buffer.<DD><CODE>planeRegion</CODE> - rectangle containing the width and height of the |
| component plane to which <code>coeffBuffer</code> belongs<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><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="../../../org/libjpegturbo/turbojpeg/TJTransformer.html#transform(byte[][], org.libjpegturbo.turbojpeg.TJTransform[], int)"><CODE>TJTransformer.transform()</CODE></A>.<DD><CODE>transform</CODE> - a <A HREF="../../../org/libjpegturbo/turbojpeg/TJTransform.html" title="class in org.libjpegturbo.turbojpeg"><CODE>TJTransform</CODE></A> instance that specifies the |
| parameters and/or cropping region for this transform |
| <DT><B>Throws:</B> |
| <DD><CODE>java.lang.Exception</CODE></DL> |
| </DD> |
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