com.inductiveautomation.rm.pdf.reader.fps

Class RadialShading

java.lang.Object

com.inductiveautomation.rm.pdf.reader.PDFPattern

com.inductiveautomation.rm.pdf.reader.fps.ShadingPattern

com.inductiveautomation.rm.pdf.reader.fps.RadialShading

All Implemented Interfaces:

java.awt.Paint, java.awt.PaintContext, java.awt.Transparency

public class RadialShading
extends ShadingPattern

A concrete subclass of PDFShadingPattern which implements pdf radial (type 3) shadings.

PDF radial shadings are defined by two circles and a function. The circles need not be centered at the same location. The shading works by interpolating the centers and radii of the two circles. The distance along the line defined by the two centers or radii is then mapped into the domain of the function, which returns the final color values. TODO: currently ignores transform and background color

Field Summary

Fields inherited from class com.inductiveautomation.rm.pdf.reader.fps.ShadingPattern

ArbitraryColorSpaceShading, DeviceGrayShading, DeviceRGBShading

Fields inherited from interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors

Constructor and Description
RadialShading(java.util.Map patternDict, java.util.Map shadingDict, PDFFile srcFile)

Method Summary

Modifier and Type	Method and Description
void	doShading(int[] samples, int x, int y, int w, int h) Subclasses should implement this method to draw the shading.
void	doShadingWithTransform(int[] samples, int x, int y, int w, int h)
void	initializeShadingParameters(java.util.Map shadingDict, PDFFile srcFile) Read the shading parameters
void	setDeviceTransform(java.awt.geom.AffineTransform x, java.awt.Rectangle devRect) Sets the transform from user space to device space

Methods inherited from class com.inductiveautomation.rm.pdf.reader.fps.ShadingPattern

createContext, dispose, getBounds, getColorModel, getInstance, getPaint, getRaster, getRGBAPixel, getTransform, getTransparency, setColorSpace

Methods inherited from class com.inductiveautomation.rm.pdf.reader.PDFPattern

getGState, getInstance

Methods inherited from class java.lang.Object

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

Constructor Detail

RadialShading

public RadialShading(java.util.Map patternDict,
                     java.util.Map shadingDict,
                     PDFFile srcFile)

Method Detail

initializeShadingParameters

public void initializeShadingParameters(java.util.Map shadingDict,
                                        PDFFile srcFile)

Read the shading parameters

Overrides:

initializeShadingParameters in class ShadingPattern

setDeviceTransform

public void setDeviceTransform(java.awt.geom.AffineTransform x,
                               java.awt.Rectangle devRect)

Sets the transform from user space to device space

Overrides:

setDeviceTransform in class ShadingPattern

doShading

public void doShading(int[] samples,
                      int x,
                      int y,
                      int w,
                      int h)

Description copied from class: ShadingPattern

Subclasses should implement this method to draw the shading. Samples is defined to be an array of 8 bit persample/4 samples per pixel ARGB pixels. There is no padding, so all scanlines are w integers wide.

Specified by:

doShading in class ShadingPattern

doShadingWithTransform

public void doShadingWithTransform(int[] samples,
                                   int x,
                                   int y,
                                   int w,
                                   int h)