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

Class AxialShadingContext

java.lang.Object

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

org.apache.pdfbox.pdmodel.graphics.shading.AxialShadingContext

All Implemented Interfaces:

java.awt.PaintContext

public class AxialShadingContext
extends ShadingContext

AWT PaintContext for axial shading. Performance improvement done as part of GSoC2014, Tilman Hausherr is the mentor.

Field Summary

Fields

Modifier and Type	Field	Description
private PDShadingType2	axialShadingType
private int[]	colorTable
private float[]	coords
private float	d1d0
private double	denom
private float[]	domain
private boolean[]	extend
private int	factor
private static org.apache.commons.logging.Log	LOG
private java.awt.geom.AffineTransform	rat
private double	x1x0
private double	y1y0

Constructor Summary

Constructors

Constructor	Description
AxialShadingContext(PDShadingType2 shading, java.awt.image.ColorModel colorModel, java.awt.geom.AffineTransform xform, Matrix matrix, java.awt.Rectangle deviceBounds)	Constructor creates an instance to be used for fill operations.

Method Summary

Modifier and Type	Method	Description
private int[]	calcColorTable()	Calculate the color on the axial line and store them in an array.
void	dispose()
float[]	getCoords()	Returns the coords values.
float[]	getDomain()	Returns the domain values.
boolean[]	getExtend()	Returns the extend values.
PDFunction	getFunction()	Returns the function.
java.awt.image.Raster	getRaster(int x, int y, int w, int h)

Methods inherited from class org.apache.pdfbox.pdmodel.graphics.shading.ShadingContext

convertToRGB, getBackground, getColorModel, getRgbBackground, getShading, getShadingColorSpace

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.apache.commons.logging.Log LOG

axialShadingType

private PDShadingType2 axialShadingType

coords

private final float[] coords

domain

private final float[] domain

extend

private final boolean[] extend

x1x0

private final double x1x0

y1y0

private final double y1y0

d1d0

private final float d1d0

denom

private final double denom

factor

private final int factor

colorTable

private final int[] colorTable

rat

private java.awt.geom.AffineTransform rat

Constructor Detail

AxialShadingContext

public AxialShadingContext(PDShadingType2 shading,
                           java.awt.image.ColorModel colorModel,
                           java.awt.geom.AffineTransform xform,
                           Matrix matrix,
                           java.awt.Rectangle deviceBounds)
                    throws java.io.IOException

Constructor creates an instance to be used for fill operations.

Parameters:

shading - the shading type to be used

colorModel - 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

deviceBounds - the bounds of the area to paint, in device units

Throws:

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

Method Detail

calcColorTable

private int[] calcColorTable()
                      throws java.io.IOException

Calculate the color on the axial line and store them in an array.

Returns:

an array, index denotes the relative position, the corresponding value is the color on the axial line

Throws:

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

dispose

public void dispose()

Specified by:

dispose in interface java.awt.PaintContext

Overrides:

dispose in class ShadingContext

getRaster

public java.awt.image.Raster getRaster(int x,
                                       int y,
                                       int w,
                                       int h)

getCoords

public float[] getCoords()

Returns the coords values.

Returns:

the coords values

getDomain

public float[] getDomain()

Returns the domain values.

Returns:

the domain values

getExtend

public boolean[] getExtend()

Returns the extend values.

Returns:

the extend values

getFunction

public PDFunction getFunction()
                       throws java.io.IOException

Returns the function.

Returns:

the function

Throws:

java.io.IOException - if we were not able to create the function.