org.apache.fop.afp.ioca

Class ImageRasterData

java.lang.Object

org.apache.fop.afp.modca.AbstractAFPObject

org.apache.fop.afp.ioca.ImageRasterData

All Implemented Interfaces:

Streamable

public class ImageRasterData
extends AbstractAFPObject

Contains the image points that define the IM image raster pattern. A raster pattern is the array of presentation device pels that forms the image. The image data is uncompressed. Bits are grouped into bytes and are ordered from left to right within each byte. Each bit in the image data represents an image point and is mapped to presentation device pels as specified in the IOC structured field. A bit with value B'1' indicates a significant image point; a bit with value B'0' indicates an insignificant image point. Image points are recorded from left to right in rows that represents scan lines (X direction), and rows representing scan lines are recorded from top to bottom (Y direction). When the image is presented, all image points in a row are presented before any image points in the next sequential row are presented, and all rows have the same number of image points. If the total number of image points is not a multiple of 8, the last byte of the image data is padded to a byte boundary. The padding bits do not represent image points and are ignored by presentation devices.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.fop.afp.modca.AbstractAFPObject

AbstractAFPObject.Category, AbstractAFPObject.Type

Field Summary

Fields inherited from class org.apache.fop.afp.modca.AbstractAFPObject

LOG, SF_CLASS, SF_HEADER_LENGTH

Constructor Summary

Constructors

Constructor and Description
ImageRasterData(byte[] data) Constructor for the image raster data object

Method Summary

Methods

Modifier and Type	Method and Description
void	writeToStream(OutputStream os) DataStream objects must implement the writeToStream() method to write its data to the given OutputStream

Methods inherited from class org.apache.fop.afp.modca.AbstractAFPObject

copySF, copySF, truncate, writeChunksToStream, writeObjects

Methods inherited from class java.lang.Object

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

Constructor Detail

ImageRasterData

public ImageRasterData(byte[] data)

Constructor for the image raster data object

Parameters:

data - The raster image data

Method Detail

writeToStream

public void writeToStream(OutputStream os)
                   throws IOException

DataStream objects must implement the writeToStream() method to write its data to the given OutputStream

Parameters:

os - the outputsteam stream

Throws:

IOException - an I/O exception of some sort has occurred.