TrnsChunk (JHOVE External Modules 1.26.1 API)

java.lang.Object
- com.mcgath.jhove.module.png.PNGChunk
- - com.mcgath.jhove.module.png.TrnsChunk

```
public class TrnsChunk
extends PNGChunk
```
The Transparency chunk. The interpretation of the Transparency chunk depends on the color type. For color type 0 (greyscale) there is one two-byte integer, representing the gray sample value. For color type 2 (RGB) there are three two-byte integers, representing the red, blue, and green sample values respectively. For color type 3 (palette), the values are bytes giving the alpha value for the palette index. The number of values may be less than or equal to the length of the palette.

- Field Summary
  - Fields inherited from class com.mcgath.jhove.module.png.PNGChunk
    _dstream, _module, _nisoMetadata, _propList, ancillary, bKGD_HEAD_SIG, cHRM_HEAD_SIG, chunkData, chunkType, crc, duplicateAllowed, gAMA_HEAD_SIG, hIST_HEAD_SIG, iCCP_HEAD_SIG, IDAT_HEAD_SIG, IEND_HEAD_SIG, IHDR_HEAD_SIG, iTXt_HEAD_SIG, length, pHYs_HEAD_SIG, PLTE_HEAD_SIG, sBIT_HEAD_SIG, sPLT_HEAD_SIG, sRGB_HEAD_SIG, tEXt_HEAD_SIG, tIME_HEAD_SIG, tRNS_HEAD_SIG, zTXt_HEAD_SIG
- Constructor Summary
  
  Constructors
  Constructor Description
  
  TrnsChunk(int sig, long leng)
  Constructor
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void processChunk(RepInfo info)
  Process the data in the chunk.
  - Methods inherited from class com.mcgath.jhove.module.png.PNGChunk
    chunkTypeString, getChunkData, getChunkType, getCRC, getLength, makePNGChunk, processChunkCommon, readCRC, readUnsignedByte, readUnsignedInt, readUnsignedShort, setInputStream, setModule, setNisoMetadata, setPropertyList, skipBytes
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TrnsChunk
```
public TrnsChunk(int sig,
                 long leng)
```
    Constructor
- Method Detail
  - processChunk
```
public void processChunk(RepInfo info)
                  throws Exception
```
    Process the data in the chunk.
    
    Overrides:
    
    processChunk in class PNGChunk
    
    Throws:
    
    Exception