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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 1997-2017 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
*
* ---------------
* XForm.java
* ---------------
*/
package org.jpedal.parser.image;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.geom.Area;
import java.awt.geom.GeneralPath;
import org.jpedal.io.PdfObjectReader;
import org.jpedal.objects.GraphicsState;
import org.jpedal.objects.raw.PdfDictionary;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.render.DynamicVectorRenderer;
import org.jpedal.utils.Matrix;
/**
*
*/
public class XForm {
private static boolean hasEmptySMask(final GraphicsState gs){
return gs.SMask!=null && gs.SMask.getGeneralType(PdfDictionary.SMask)==PdfDictionary.None;
}
public static PdfObject getSMask(final float[] BBox, final GraphicsState gs, final PdfObjectReader currentPdfFile) {
PdfObject newSMask=null;
//ignore if none
if(hasEmptySMask(gs)){
return null;
}
if(gs.SMask!=null && BBox!=null){ //see if SMask to cache to image & stop negative cases such as Milkshake StckBook Activity disX.pdf
//if(gs.SMask.getParameterConstant(PdfDictionary.Type)!=PdfDictionary.Mask || gs.SMask.getFloatArray(PdfDictionary.BC)!=null){ //fix for waves file
newSMask= gs.SMask.getDictionary(PdfDictionary.G);
currentPdfFile.checkResolved(newSMask);
// }
}
return newSMask;
}
private static final float[] matches={1f,0f,0f,1f,0f,0f};
public static boolean isIdentity(final float[] matrix) {
boolean isIdentity=true;// assume right and try to disprove
if(matrix!=null){
//see if it matches if not set flag and exit
for(int ii=0;ii<6;ii++){
if(matrix[ii]!=matches[ii]){
isIdentity=false;
break;
}
}
}
return isIdentity;
}
public static Area setClip(final Shape defaultClip, final float[] BBox, final GraphicsState gs, final DynamicVectorRenderer current) {
final Rectangle rect = new Rectangle();
rect.setFrameFromDiagonal(BBox[0],BBox[1],BBox[2],BBox[3]);
final float minX = (float)rect.getMinX();
final float minY = (float)rect.getMinY();
final float maxX = (float)rect.getMaxX();
final float maxY = (float)rect.getMaxY();
final float[] p1 = Matrix.transformPoint(gs.CTM, minX, minY);
final float[] p2 = Matrix.transformPoint(gs.CTM, maxX, minY);
final float[] p3 = Matrix.transformPoint(gs.CTM, maxX, maxY);
final float[] p4 = Matrix.transformPoint(gs.CTM, minX, maxY);
final GeneralPath gp = new GeneralPath();
gp.moveTo(p1[0], p1[1]);
gp.lineTo(p2[0], p2[1]);
gp.lineTo(p3[0], p3[1]);
gp.lineTo(p4[0], p4[1]);
gp.closePath();
final Area clip;
if(gs.getClippingShape()==null) {
clip=null;
}
else {
clip= (Area) gs.getClippingShape().clone();
}
gs.updateClip(new Area(gp));
current.drawClip(gs, defaultClip,false) ;
return clip;
}
}