Package com.inductiveautomation.rm.pdf.reader

Class PDFTiledImage

java.lang.Object

com.inductiveautomation.rm.pdf.reader.PDFTiledImage

All Implemented Interfaces:

ImageConsumer

public class PDFTiledImage
extends Object
implements ImageConsumer

This class handles drawing images as tiles, for when allocating a BufferedImage for the entire pdf image would be too expensive. It implements ImageConsumer, and assumes that it will be passes an ImageProducer that knows how to generate itself top-down/left-right.

It keeps a BufferedImage only as large as a single tile. When drawImage() is called, the imageProducer is told to generate the image data. As soon as a single tile is filled, it is drawn and the Buffer is reused for the next tile. We could cut out the imageProducer middle-man and just go directly from the codec...

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PDFTiledImage.TiledImageProxy

Field Summary

Fields inherited from interface java.awt.image.ImageConsumer

COMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT

Constructor Summary

Constructors

Constructor	Description
PDFTiledImage()

Method Summary

Modifier and Type	Method	Description
void	drawImage(ImageProducer ip, Graphics2D destination)	The main entry point.
static void	drawTiledImage(ImageProducer ip, Graphics2D destination)
int	getHeight()	Returns the height of the entire image.
WritableRaster	getTileBuffer()
int	getTileHeight()	Returns the height of the tile (it's a strip)
int	getWidth()	Returns the width of the entire image.
void	imageComplete(int status)	ImageConsumer method.
void	setColorModel(ColorModel model)
void	setDimensions(int width, int height)	ImageConsumer method.
void	setHints(int hintflags)
void	setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int off, int scansize)
void	setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int off, int scansize)
void	setProperties(Hashtable props)

Methods inherited from class java.lang.Object

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

Constructor Details

PDFTiledImage

public PDFTiledImage()

Method Details

getTileHeight

public int getTileHeight()

Returns the height of the tile (it's a strip)

getWidth

public int getWidth()

Returns the width of the entire image.

getHeight

public int getHeight()

Returns the height of the entire image.

imageComplete

public void imageComplete(int status)

ImageConsumer method. Releases the tile.

Specified by:

imageComplete in interface ImageConsumer

setHints

public void setHints(int hintflags)

Specified by:

setHints in interface ImageConsumer

setColorModel

public void setColorModel(ColorModel model)

Specified by:

setColorModel in interface ImageConsumer

setDimensions

public void setDimensions(int width,
 int height)

ImageConsumer method. Assumption is that this will be called before any calls to setPixels()

Specified by:

setDimensions in interface ImageConsumer

getTileBuffer

public WritableRaster getTileBuffer()

setPixels

public void setPixels(int x,
 int y,
 int w,
 int h,
 ColorModel model,
 byte[] pixels,
 int off,
 int scansize)

Specified by:

setPixels in interface ImageConsumer

setPixels

public void setPixels(int x,
 int y,
 int w,
 int h,
 ColorModel model,
 int[] pixels,
 int off,
 int scansize)

Specified by:

setPixels in interface ImageConsumer

setProperties

public void setProperties(Hashtable props)

Specified by:

setProperties in interface ImageConsumer

drawImage

public void drawImage(ImageProducer ip,
 Graphics2D destination)

The main entry point. Images are drawn at 0,0 so destination should have the image transform applied to it.

drawTiledImage

public static void drawTiledImage(ImageProducer ip,
 Graphics2D destination)