Package com.sun.pdfview.pattern

Class ShaderType2.Type2PaintContext

java.lang.Object

com.sun.pdfview.pattern.ShaderType2.Type2PaintContext

All Implemented Interfaces:

PaintContext

Enclosing class:

ShaderType2

class ShaderType2.Type2PaintContext
extends Object
implements PaintContext

A simple paint context that uses an existing raster in device space to generate pixels

Field Summary

Fields

Modifier and Type	Field	Description
private ColorModel	colorModel	the color model
private Point2D	end	the end of the axis
private Point2D	start	the start of the axis

Constructor Summary

Constructors

Constructor	Description
Type2PaintContext(ColorModel colorModel, Point2D start, Point2D end)	Create a paint context

Method Summary

Modifier and Type	Method	Description
void	dispose()
ColorModel	getColorModel()
Raster	getRaster(int x, int y, int w, int h)
private float	getT(float xp)	t = t0 + (t1 - t0) x x'
private float	getXPrime(float x, float y, float x0, float y0, float x1, float y1)	x' = (x1 - x0) * (x - x0) + (y1 - y0) * (y - y0) ------------------------------------------- (x1 - x0)^2 + (y1 - y0)^2

Methods inherited from class java.lang.Object

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

Field Details

colorModel

private ColorModel colorModel

the color model

start

private Point2D start

the start of the axis

end

private Point2D end

the end of the axis

Constructor Details

Type2PaintContext

Type2PaintContext(ColorModel colorModel,
 Point2D start,
 Point2D end)

Create a paint context

Method Details

dispose

public void dispose()

Specified by:

dispose in interface PaintContext

getColorModel

public ColorModel getColorModel()

Specified by:

getColorModel in interface PaintContext

getRaster

public Raster getRaster(int x,
 int y,
 int w,
 int h)

Specified by:

getRaster in interface PaintContext

getXPrime

private float getXPrime(float x,
 float y,
 float x0,
 float y0,
 float x1,
 float y1)

x' = (x1 - x0) * (x - x0) + (y1 - y0) * (y - y0) ------------------------------------------- (x1 - x0)^2 + (y1 - y0)^2

getT

private float getT(float xp)

t = t0 + (t1 - t0) x x'