Package com.inductiveautomation.rm.pdf.reader.fps

Class ShadingPattern

java.lang.Object

com.inductiveautomation.rm.pdf.reader.PDFPattern

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

All Implemented Interfaces:

Paint, PaintContext, Transparency

Direct Known Subclasses:

AxialShading, FunctionShading, RadialShading

public abstract class ShadingPattern
extends PDFPattern
implements PaintContext, Paint

PDFShadingPattern.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ArbitraryColorSpaceShading
static final int	DeviceGrayShading
static final int	DeviceRGBShading

Fields inherited from interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors

Constructor	Description
ShadingPattern(Map patternDict, Map shadingDict, PDFFile srcFile)	Constructor - patternDict may be null if this object was created from the shading operator (sh).

Method Summary

Modifier and Type	Method	Description
PaintContext	createContext(ColorModel cm, Rectangle deviceBounds, Rectangle2D userBounds, AffineTransform xform, RenderingHints hints)	Paint & PaintContext interfaces
void	dispose()
abstract void	doShading(int[] samples, int x, int y, int w, int h)	Subclasses should implement this method to draw the shading.
Rectangle2D	getBounds()
ColorModel	getColorModel()
static ShadingPattern	getInstance(Map dict, PDFFile srcFile)	Create an instance from a shading dictionary or a pattern dictionary.
Paint	getPaint()	Returns the awt Paint object which will render the pattern
Raster	getRaster(int x, int y, int w, int h)
int	getRGBAPixel(float[] sampleValues)	This routine will get called for every pixel in the inner loop of the shading.
AffineTransform	getTransform()	Returns the pattern space transform
int	getTransparency()	Alpha & color definitions
void	initializeShadingParameters(Map shadingDict, PDFFile srcFile)	Read the shading parameters
void	setColorSpace(ColorSpace c)
void	setDeviceTransform(AffineTransform x, Rectangle devRect)	Sets the transform from user space to device space

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

Field Details

DeviceRGBShading

public static final int DeviceRGBShading

See Also:

• Constant Field Values

DeviceGrayShading

public static final int DeviceGrayShading

See Also:

• Constant Field Values

ArbitraryColorSpaceShading

public static final int ArbitraryColorSpaceShading

See Also:

• Constant Field Values

Constructor Details

ShadingPattern

public ShadingPattern(Map patternDict,
 Map shadingDict,
 PDFFile srcFile)

Constructor - patternDict may be null if this object was created from the shading operator (sh).

Method Details

getInstance

public static ShadingPattern getInstance(Map dict,
 PDFFile srcFile)

Create an instance from a shading dictionary or a pattern dictionary.

initializeShadingParameters

public void initializeShadingParameters(Map shadingDict,
 PDFFile srcFile)

Read the shading parameters

setDeviceTransform

public void setDeviceTransform(AffineTransform x,
 Rectangle devRect)

Sets the transform from user space to device space

getTransform

public AffineTransform getTransform()

Returns the pattern space transform

Specified by:

getTransform in class PDFPattern

getBounds

public Rectangle2D getBounds()

setColorSpace

public void setColorSpace(ColorSpace c)

getRGBAPixel

public int getRGBAPixel(float[] sampleValues)

This routine will get called for every pixel in the inner loop of the shading. If that gets too slow, you could always try to inline it. sampleValues are assumed to to have the right number of elements in the right range for the colorspace.

getPaint

public Paint getPaint()

Description copied from class: PDFPattern

Returns the awt Paint object which will render the pattern

Specified by:

getPaint in class PDFPattern

createContext

public PaintContext createContext(ColorModel cm,
 Rectangle deviceBounds,
 Rectangle2D userBounds,
 AffineTransform xform,
 RenderingHints hints)

Paint & PaintContext interfaces

Specified by:

createContext in interface Paint

dispose

public void dispose()

Specified by:

dispose in interface PaintContext

getRaster

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

Specified by:

getRaster in interface PaintContext

getTransparency

public int getTransparency()

Alpha & color definitions

Specified by:

getTransparency in interface Transparency

getColorModel

public ColorModel getColorModel()

Specified by:

getColorModel in interface PaintContext

doShading

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

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.