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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2016 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* ExampleImageDrawOnScreenHandler.java
* ---------------
*/
package org.jpedal.examples.handlers;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import org.jpedal.color.ColorSpaces;
import org.jpedal.io.ObjectStore;
import org.jpedal.objects.GraphicsState;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.utils.LogWriter;
/**
* example code to plugin external image handler. Code to enable commented out in Viewer
*/
public class ExampleImageDrawOnScreenHandler implements org.jpedal.external.ImageHandler {
//tell JPedal if it ignores its own Image code or not
@Override
public boolean alwaysIgnoreGenericHandler() {
return false;
}//pass in raw data for image handling - if valid image returned it will be used.
//if alwaysIgnoreGenericHandler() is true JPedal code always ignored. If false, JPedal code used if null
@Override
public BufferedImage processImageData(final GraphicsState gs, final PdfObject XObject) {
return null;
}
@Override
public boolean imageHasBeenScaled() {
return false;
}
@Override
public boolean drawImageOnscreen(BufferedImage image, final int optionsApplied, AffineTransform upside_down,
final String currentImageFile, final Graphics2D g2, final boolean renderDirect,
final ObjectStore objectStoreRef, final boolean isPrinting) {
//this is the draw code from DynamicVectorRenderer as at 11th June 2007
final double[] values=new double[6];
upside_down.getMatrix(values);
final boolean isSlightlyRotated=(values[0]*values[1]!=0)||(values[2]*values[3]!=0);
//accelerate large bw images non-rotated
//accelerate large bw images non-rotated (use for all images for moment)
if(isSlightlyRotated || image.getWidth()<800 || renderDirect){ //image.getType()!=12 || CTM[0][0]<0 || CTM[1][1]<0 || CTM[1][0]<0 || CTM[0][1]<0)
g2.drawImage(image,upside_down,null);
}else{ //speedup large straightforward images
double dy=0,dx=0;
//if already turned, tweak transform
//int count=values.length;
//for(int jj=0;jj© 2015 - 2024 Weber Informatics LLC | Privacy Policy