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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 1997-2015 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
*
* ---------------
* PDFtoImageConvertorFX.java
* ---------------
*/
package org.jpedal.parser.fx;
import java.awt.image.BufferedImage;
import java.util.concurrent.CountDownLatch;
import javafx.application.Platform;
import javafx.beans.property.SimpleObjectProperty;
import javafx.embed.swing.SwingFXUtils;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.SnapshotResult;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.transform.Transform;
import javafx.util.Callback;
import org.jpedal.exception.PdfException;
import org.jpedal.render.*;
import org.jpedal.io.ObjectStore;
import org.jpedal.objects.acroforms.AcroRenderer;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.parser.*;
public class PDFtoImageConvertorFX extends PDFtoImageConvertor{
int pageIndex;
public PDFtoImageConvertorFX(final float multiplyer, final DecoderOptions options) {
super(multiplyer, options);
isFX = true;
}
@Override
public DynamicVectorRenderer getDisplay(final int pageIndex, final ObjectStore localStore, boolean isTransparent) {
this.pageIndex=pageIndex;
return imageDisplay = new FXDisplayForRasterizing(pageIndex,!isTransparent, 5000, localStore); //note !isTransparent as actually addBackground
}
@Override
public BufferedImage pageToImage(final boolean imageIsTransparent, final PdfStreamDecoder currentImageDecoder,
final float scaling, final PdfObject pdfObject,final AcroRenderer formRenderer) throws PdfException {
/**
BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
Graphics graphics = image.getGraphics();
Graphics2D g2 = (Graphics2D) graphics;
if (!imageIsTransparent) {
g2.setColor(Color.white);
g2.fillRect(0, 0, w, h);
}
// adjustment for upside down images
if(rotation==180){
g2.translate(crx*2*multiplyer, -(cry*2*multiplyer));
}
// pass in values as needed for patterns
imageDisplay.setScalingValues(crx*multiplyer, (crh*multiplyer) + cry, multiplyer*scaling);
g2.setRenderingHints(ColorSpaces.hints);
g2.transform(imageScaling);
if (rotated){
if(rotation==90){//90
if(multiplyer<1){
cry = (int)(imageScaling.getTranslateX() + cry);
crx = (int)(imageScaling.getTranslateY() + crx);
}else{
cry = (int)((imageScaling.getTranslateX()/multiplyer) + cry);
crx = (int)((imageScaling.getTranslateY()/multiplyer) + crx);
}
g2.translate(-crx, -cry);
}else{ //270
if(cry<0)
g2.translate(-crx, mediaH-crh+cry);
else
g2.translate(-crx,mediaH-crh-cry);
}
}/**/
final SimpleObjectProperty imageProperty = new SimpleObjectProperty();
// Locks the Thread until the image is generated
final CountDownLatch latch = new CountDownLatch(1);
if(Platform.isFxApplicationThread()){
snapshot(currentImageDecoder, scaling, pdfObject, null, imageProperty,formRenderer);
}else{
Platform.runLater(new Runnable() {
@Override public void run() {
snapshot(currentImageDecoder, scaling, pdfObject, latch, imageProperty,formRenderer);
}
});
}
try {
// This will hang if we're on the FX Thread
if(!Platform.isFxApplicationThread()) {
latch.await();
}
} catch (final InterruptedException ex) {
ex.printStackTrace();
}
return imageProperty.get();
}
private void snapshot(final PdfStreamDecoder currentImageDecoder, final float scaling, final PdfObject pdfObject,
final CountDownLatch latch, final SimpleObjectProperty imageProperty,final AcroRenderer formRenderer){
Pane g=new Pane();
try {
formRenderer.getCompData().setRootDisplayComponent(g);
// currentImageDecoder.setObjectValue(ValueTypes.DirectRendering, null);//(Graphics2D) graphics);
currentImageDecoder.decodePageContent(pdfObject);
formRenderer.createDisplayComponentsForPage(pageIndex, currentImageDecoder);
formRenderer.displayComponentsOnscreen(pageIndex, pageIndex);
formRenderer.getCompData().resetScaledLocation(scaling, 0, 0);
} catch (final Exception ex) {
ex.printStackTrace();
}
Group group;
group=((FXDisplay)imageDisplay).getFXPane();
group.getChildren().addAll(g.getChildren());
// Transform from PDF coordinates and apply scaling
group.getTransforms().add(Transform.affine(1 * scaling,0,0,-1 * scaling,crx,h+cry));
final Scene scene=new Scene(group,w,h);
// Fixes blending
scene.setFill(Color.rgb(255, 255, 255, 1.0));
if(latch != null){
// Async call to snapshot
scene.snapshot(new Callback() {
@Override public Void call(final SnapshotResult p) {
imageProperty.set(SwingFXUtils.fromFXImage(p.getImage(), null));
latch.countDown();
return null;
}
},null);
}else{ // If we're on the FX Thread, get the snapshot straight away.
imageProperty.set(SwingFXUtils.fromFXImage(scene.snapshot(null),null));
}
}
}