org.libjpegturbo.turbojpeg
Interface TJCustomFilter
- public interface TJCustomFilter 
Custom filter callback interface
| Method Summary | 
|  void | customFilter(java.nio.ShortBuffer coeffBuffer,
             java.awt.Rectangle bufferRegion,
             java.awt.Rectangle planeRegion,
             int componentID,
             int transformID,
             TJTransform transform)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 file.
 | 
 
customFilter
void customFilter(java.nio.ShortBuffer coeffBuffer,
                  java.awt.Rectangle bufferRegion,
                  java.awt.Rectangle planeRegion,
                  int componentID,
                  int transformID,
                  TJTransform transform)
                  throws java.lang.Exception
- 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 file.  This allows for custom filters or other transformations to be
 applied in the frequency domain.
 
- 
- Parameters:
- coeffBuffer- 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.)
- bufferRegion- rectangle containing the width and height of- coeffBufferas 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.
- planeRegion- rectangle containing the width and height of the
 component plane to which- coeffBufferbelongs
- componentID- ID number of the component plane to which- coeffBufferbelongs (Y, U, and V have, respectively, ID's of
 0, 1, and 2 in typical JPEG images.)
- transformID- ID number of the transformed image to which- coeffBufferbelongs.  This is the same as the index of the
 transform in the- transformsarray that was passed to- TJTransformer.transform().
- transform- a- TJTransforminstance that specifies the
 parameters and/or cropping region for this transform
- Throws:
- java.lang.Exception