Package org.apache.pdfbox.pdmodel.graphics.shading

Class ShadingContext

java.lang.Object

org.apache.pdfbox.pdmodel.graphics.shading.ShadingContext

All Implemented Interfaces:

java.awt.PaintContext

Direct Known Subclasses:

AxialShadingContext, RadialShadingContext, TriangleBasedShadingContext, Type1ShadingContext

public abstract class ShadingContext
extends java.lang.Object
implements java.awt.PaintContext

A base class to handle what is common to all shading types.

Field Summary

Fields

Modifier and Type	Field	Description
private float[]	background
private java.awt.image.ColorModel	outputColorModel
private int	rgbBackground
private PDShading	shading
private PDColorSpace	shadingColorSpace

Constructor Summary

Constructors

Constructor	Description
ShadingContext(PDShading shading, java.awt.image.ColorModel cm, java.awt.geom.AffineTransform xform, Matrix matrix)	Constructor.

Method Summary

Modifier and Type	Method	Description
(package private) int	convertToRGB(float[] values)	Convert color values from shading colorspace to RGB color values encoded into an integer.
void	dispose()
(package private) float[]	getBackground()
java.awt.image.ColorModel	getColorModel()
(package private) int	getRgbBackground()
(package private) PDShading	getShading()
(package private) PDColorSpace	getShadingColorSpace()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.awt.PaintContext

getRaster

Field Detail

background

private float[] background

rgbBackground

private int rgbBackground

shading

private final PDShading shading

outputColorModel

private java.awt.image.ColorModel outputColorModel

shadingColorSpace

private PDColorSpace shadingColorSpace

Constructor Detail

ShadingContext

public ShadingContext(PDShading shading,
                      java.awt.image.ColorModel cm,
                      java.awt.geom.AffineTransform xform,
                      Matrix matrix)
               throws java.io.IOException

Constructor.

Parameters:

shading - the shading type to be used

cm - the color model to be used

xform - transformation for user to device space

matrix - the pattern matrix concatenated with that of the parent content stream

Throws:

java.io.IOException - if there is an error getting the color space or doing background color conversion.

Method Detail

getShadingColorSpace

PDColorSpace getShadingColorSpace()

getShading

PDShading getShading()

getBackground

float[] getBackground()

getRgbBackground

int getRgbBackground()

convertToRGB

final int convertToRGB(float[] values)
                throws java.io.IOException

Convert color values from shading colorspace to RGB color values encoded into an integer.

Parameters:

values - color values in shading colorspace.

Returns:

RGB values encoded in an integer.

Throws:

java.io.IOException - if the color conversion fails.

getColorModel

public java.awt.image.ColorModel getColorModel()

Specified by:

getColorModel in interface java.awt.PaintContext

dispose

public void dispose()

Specified by:

dispose in interface java.awt.PaintContext