org.jpedal.examples.handlers
Class ExampleImageDrawOnScreenHandler

java.lang.Object
  org.jpedal.examples.handlers.ExampleImageDrawOnScreenHandler

All Implemented Interfaces:

ImageHandler

public class ExampleImageDrawOnScreenHandler
extends java.lang.Object
implements ImageHandler

example code to plugin external image handler. Code to enable commented out in SimpleViewer

Constructor Summary

ExampleImageDrawOnScreenHandler()

Method Summary

boolean	alwaysIgnoreGenericHandler()
static javax.media.jai.KernelJAI	createBlurKernel(float scaleX, float scaleY, float quality)
boolean	drawImageOnscreen(java.awt.image.BufferedImage image, int optionsApplied, java.awt.geom.AffineTransform upside_down, java.lang.String currentImageFile, java.awt.Graphics2D g2, boolean renderDirect, ObjectStore objectStoreRef, boolean isPrinting) Allow user to paint directly onto g2 for screen display
static java.awt.image.BufferedImage	getAffineTransform(java.awt.image.RenderedImage ri, java.awt.geom.AffineTransform src2me, java.awt.RenderingHints hints, float quality)
boolean	imageHasBeenScaled() Indicate that image already scaled so should not be scaled/clipped by JPedal
java.awt.image.BufferedImage	processImageData(org.jpedal.objects.GraphicsState gs, org.jpedal.objects.raw.PdfObject XObject, org.jpedal.objects.raw.PdfObject ColorSpace)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExampleImageDrawOnScreenHandler

public ExampleImageDrawOnScreenHandler()

Method Detail

alwaysIgnoreGenericHandler

public boolean alwaysIgnoreGenericHandler()

Specified by:

alwaysIgnoreGenericHandler in interface ImageHandler

processImageData

public java.awt.image.BufferedImage processImageData(org.jpedal.objects.GraphicsState gs,
                                                     org.jpedal.objects.raw.PdfObject XObject,
                                                     org.jpedal.objects.raw.PdfObject ColorSpace)

Specified by:

processImageData in interface ImageHandler

imageHasBeenScaled

public boolean imageHasBeenScaled()

Description copied from interface: ImageHandler

Indicate that image already scaled so should not be scaled/clipped by JPedal

Specified by:

imageHasBeenScaled in interface ImageHandler

drawImageOnscreen

public boolean drawImageOnscreen(java.awt.image.BufferedImage image,
                                 int optionsApplied,
                                 java.awt.geom.AffineTransform upside_down,
                                 java.lang.String currentImageFile,
                                 java.awt.Graphics2D g2,
                                 boolean renderDirect,
                                 ObjectStore objectStoreRef,
                                 boolean isPrinting)

Description copied from interface: ImageHandler

Allow user to paint directly onto g2 for screen display

Specified by:

drawImageOnscreen in interface ImageHandler

Parameters:

image - - actual BufferedImage

optionsApplied - - any options already done (ie 90 rotate) - values from org.jpedal.constants.PDFImageProcessing

upside_down - - AffineTransform applied to page

currentImageFile - - name of file stored on disk

g2 - - Graphics2D render object

renderDirect - -if being rendered straight to g2 (ie bufferedImage)

objectStoreRef - - JPedals class to access cached images

Returns:

true to ignore standard JPedal routines and false to use.

getAffineTransform

public static java.awt.image.BufferedImage getAffineTransform(java.awt.image.RenderedImage ri,
                                                              java.awt.geom.AffineTransform src2me,
                                                              java.awt.RenderingHints hints,
                                                              float quality)

createBlurKernel

public static javax.media.jai.KernelJAI createBlurKernel(float scaleX,
                                                         float scaleY,
                                                         float quality)