Package com.inductiveautomation.rm.pdf.reader

Class PDFImageColorModel.SoftMask

java.lang.Object

com.inductiveautomation.rm.pdf.reader.PDFImageColorModel.SoftMask

Enclosing class:

PDFImageColorModel

protected static class PDFImageColorModel.SoftMask
extends Object

A representation of the alpha channel. The SoftMask maintains a width, height, & bitspersample, since they do not necessarily have to be the same as the source image's. Can also contain a Matte array, which controls premultiplication of source color samples.

Field Summary

Fields

Modifier and Type	Field	Description
byte[]	alphabits
int	bitspersample
int	height
float[]	matte
int	width

Constructor Summary

Constructors

Constructor	Description
SoftMask(byte[] alpha, int w, int h, int bps, float[] marray)	Create SoftMask.

Method Summary

Modifier and Type	Method	Description
float	getAlpha(int x, int y)	returns the alpha value that would be mapped to the point in the source image.
int	getUnnormalizedAlpha(int x, int y)
void	setSourceImageSize(int sw, int sh)

Methods inherited from class java.lang.Object

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

Field Details

width

public int width

height

public int height

bitspersample

public int bitspersample

alphabits

public byte[] alphabits

matte

public float[] matte

Constructor Details

SoftMask

public SoftMask(byte[] alpha,
 int w,
 int h,
 int bps,
 float[] marray)

Create SoftMask.

Method Details

setSourceImageSize

public void setSourceImageSize(int sw,
 int sh)

getAlpha

public float getAlpha(int x,
 int y)

returns the alpha value that would be mapped to the point in the source image. Since the image dimensions may not match the mask dimensions, these routines find the alpha value based on the sizes of the source and destination.

getUnnormalizedAlpha

public int getUnnormalizedAlpha(int x,
 int y)