org.apache.fop.render.afp.modca
Class ImageRasterData
java.lang.Object
org.apache.fop.render.afp.modca.AbstractAFPObject
org.apache.fop.render.afp.modca.ImageRasterData
- 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.
Constructor Summary |
ImageRasterData(byte[] rasterdata)
Constructor for the image raster data object |
Method Summary |
void |
writeDataStream(java.io.OutputStream os)
Accessor method to write the AFP datastream for the Image Raster Data |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ImageRasterData
public ImageRasterData(byte[] rasterdata)
- Constructor for the image raster data object
- Parameters:
rasterdata
- The raster image data
writeDataStream
public void writeDataStream(java.io.OutputStream os)
throws java.io.IOException
- Accessor method to write the AFP datastream for the Image Raster Data
- Specified by:
writeDataStream
in class AbstractAFPObject
- Parameters:
os
- The stream to write to
- Throws:
java.io.IOException
Copyright 1999-2006 The Apache Software Foundation. All Rights Reserved.