Package com.inductiveautomation.rm.pdf.reader

Class PDFImageColorModel

java.lang.Object

java.awt.image.ColorModel

com.inductiveautomation.rm.pdf.reader.PDFImageColorModel

All Implemented Interfaces:

Transparency

public class PDFImageColorModel
extends ColorModel

The PDFImageColorModel is a subclass of PackedColorModel which can be used to display a pdf image. It maintains the image's colorspace, and will do color conversions from the image colorspace to sRGB.

Alpha may be taken from a SoftMask image.

This goes through colorspace conversion for every single pixel, and so is blindingly slow. A subclass which handles images in device colorspaces without conversion would probably be a good idea.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	PDFImageColorModel.SoftMask	A representation of the alpha channel.

Field Summary

Fields inherited from class java.awt.image.ColorModel

pixel_bits, transferType

Fields inherited from interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors

Constructor	Description
PDFImageColorModel(ColorSpace space, int bits, int[] significantBits, boolean hasalpha, int transferType)

Method Summary

Modifier and Type	Method	Description
ColorModel	coerceData(WritableRaster r, boolean premultipliedAlpha)	CoerceData.
static PDFImageColorModel	createPDFModel(ColorSpace space, int bps, float[] decodemins, float[] decodemaxs, boolean hasalpha)
static WritableRaster	createPDFRaster(byte[] packedbytes, PDFImageColorModel.SoftMask mask, ColorSpace space, int bps, int w, int h)
static WritableRaster	createPDFRaster(byte[] packedbytes, ColorSpace space, int bps, int w, int h)
int	getAlpha(int pixel)
int	getBlue(int pixel)
int	getGreen(int pixel)
int	getNumSourceComponents()	Returns the number of color components present in the input pixels
int	getRed(int pixel)
int	getRGB(int pixel)	Implemented under duress.
int	getRGB(Object inData)	Convert an array of elements, whose size is defined by the transfertype, into sRGB+alpha.
void	init(int bps, float[] decodemins, float[] decodemaxs)
boolean	isCompatibleRaster(Raster r)	Not sure.
void	setSoftMask(PDFImageColorModel.SoftMask m)	Specify softmask (alpha) information for this image

Methods inherited from class java.awt.image.ColorModel

createCompatibleSampleModel, createCompatibleWritableRaster, equals, finalize, getAlpha, getAlphaRaster, getBlue, getColorSpace, getComponents, getComponents, getComponentSize, getComponentSize, getDataElement, getDataElement, getDataElements, getDataElements, getDataElements, getGreen, getNormalizedComponents, getNormalizedComponents, getNumColorComponents, getNumComponents, getPixelSize, getRed, getRGBdefault, getTransferType, getTransparency, getUnnormalizedComponents, hasAlpha, hashCode, isAlphaPremultiplied, isCompatibleSampleModel, toString

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

PDFImageColorModel

public PDFImageColorModel(ColorSpace space,
 int bits,
 int[] significantBits,
 boolean hasalpha,
 int transferType)

Method Details

createPDFModel

public static PDFImageColorModel createPDFModel(ColorSpace space,
 int bps,
 float[] decodemins,
 float[] decodemaxs,
 boolean hasalpha)

createPDFRaster

public static WritableRaster createPDFRaster(byte[] packedbytes,
 ColorSpace space,
 int bps,
 int w,
 int h)

createPDFRaster

public static WritableRaster createPDFRaster(byte[] packedbytes,
 PDFImageColorModel.SoftMask mask,
 ColorSpace space,
 int bps,
 int w,
 int h)

init

public void init(int bps,
 float[] decodemins,
 float[] decodemaxs)

setSoftMask

public void setSoftMask(PDFImageColorModel.SoftMask m)

Specify softmask (alpha) information for this image

getNumSourceComponents

public int getNumSourceComponents()

Returns the number of color components present in the input pixels

coerceData

public ColorModel coerceData(WritableRaster r,
 boolean premultipliedAlpha)

CoerceData.

Overrides:

coerceData in class ColorModel

isCompatibleRaster

public boolean isCompatibleRaster(Raster r)

Not sure.

Overrides:

isCompatibleRaster in class ColorModel

getRGB

public int getRGB(int pixel)

Implemented under duress. The class defines these as abstract, so we have to provide implementations of them even though they'll never get called.

Overrides:

getRGB in class ColorModel

getRed

public int getRed(int pixel)

Specified by:

getRed in class ColorModel

getGreen

public int getGreen(int pixel)

Specified by:

getGreen in class ColorModel

getBlue

public int getBlue(int pixel)

Specified by:

getBlue in class ColorModel

getAlpha

public int getAlpha(int pixel)

Specified by:

getAlpha in class ColorModel

getRGB

public int getRGB(Object inData)

Convert an array of elements, whose size is defined by the transfertype, into sRGB+alpha. First we normalize the components and then let the saved pdf colorspace convert into sRGB. We then merge in the alpha to get a pixel.

Overrides:

getRGB in class ColorModel