com.luciad.format.raster

LuciadLightspeedClass TLcdPNMImageDecoder

java.lang.Object

com.luciad.format.raster.ALcdTileDecoder

com.luciad.format.raster.TLcdPNMImageDecoder

All Implemented Interfaces:

ILcdTileDecoder, ILcdInputStreamFactoryCapable

public class TLcdPNMImageDecoder
extends ALcdTileDecoder
implements ILcdTileDecoder

This class is an ILcdTileDecoder for PNM (Portable aNyMap) images, being PBM (Portable BitMap), PGM (Portable GrayMap), and PPM (Portable PixMap).

This class is thread-safe.

Note: the current implementation doesn't support PBM yet, nor the plain ASCII formats of PGM and PPM.

Constructor Summary

Constructors

Constructor and Description
TLcdPNMImageDecoder()

Method Summary

Modifier and Type	Method and Description
protected ILcdTileInfo	readTileFromStream(InputStream aInputStream, int aImageIndex, int aSubTileWidth, int aSubTileHeight, int aRowIndex, int aColumnIndex, ILcdBuffer aBuffer) Reads a sub-tile from an input stream.

Methods inherited from class com.luciad.format.raster.ALcdTileDecoder

getInputStreamFactory, isTraceOn, readTile, readTile, setClassTraceOn, setInputStreamFactory, setTraceOn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.luciad.format.raster.ILcdTileDecoder

readTile, readTile

Constructor Detail

TLcdPNMImageDecoder

public TLcdPNMImageDecoder()

Method Detail

readTileFromStream

protected ILcdTileInfo readTileFromStream(InputStream aInputStream,
                                          int aImageIndex,
                                          int aSubTileWidth,
                                          int aSubTileHeight,
                                          int aRowIndex,
                                          int aColumnIndex,
                                          ILcdBuffer aBuffer)
                                   throws TLcdCodecException

Description copied from class: ALcdTileDecoder

Reads a sub-tile from an input stream.

Specified by:

readTileFromStream in class ALcdTileDecoder

Parameters:

aInputStream - the input stream from which the tile data can be read.

aImageIndex - the index of the tile in the given input stream (if applicable).

aSubTileWidth - the width of the sub-tiles, expressed in pixels.

aSubTileHeight - the height of the sub-tiles, expressed in pixels.

aRowIndex - the row number of the sub-tile to be decoded.

aColumnIndex - the column number of the sub-tile to be decoded.

aBuffer - the buffer in which the decoded bytes will be stored.

Returns:

ILcdTileInfo information about the decoded tile.

Throws:

TLcdCodecException - in case of decoding problems.