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An Open Source JavaFX PDF Viewer
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/*
 * ===========================================
 * 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


 *
 * ---------------
 * BDC.java
 * ---------------
 */
package org.jpedal.parser.text;

import java.awt.geom.Area;
import java.awt.geom.Rectangle2D;
import org.jpedal.io.ObjectDecoder;
import org.jpedal.io.PdfObjectReader;
import org.jpedal.objects.GraphicsState;
import org.jpedal.objects.raw.MCObject;
import org.jpedal.objects.raw.PdfDictionary;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.parser.ParserOptions;
import org.jpedal.render.DynamicVectorRenderer;

public class BDC {

    public static PdfObject execute(int startCommand, final int dataPointer, final byte[] raw, final String op,
                                final GraphicsState gs, final PdfObjectReader currentPdfFile, final DynamicVectorRenderer current, final ParserOptions parserOptions) {

        final PdfObject BDCobj=new MCObject(op);
        BDCobj.setID(PdfDictionary.BDC); //use an existing feature to add unknown tags

        final int rawStart=startCommand;

        if(startCommand<1) {
            startCommand = 1;
        }

        boolean hasDictionary=true;
        while(startCommand0 && clip.getBounds().getHeight()>0){
                        gs.setClippingShape(clip);

                        current.drawClip(gs,clip,true);
                        
                        BDCobj.setClip(clip);
                    }

                }
            }else{ //direct just /OC and /MCxx

                //find /OC
                name = readOPName(dataPointer, raw, rawStart, name);
            }

            if(name!=null && !name.isEmpty()) //name referring to Layer or Title
            {
                parserOptions.setIsLayerVisible(parserOptions.layers.decodeLayer(name, true));
            }

            //flag so we can next values
            if(parserOptions.isLayerVisible()) {
                parserOptions.getLayerVisibility().add(parserOptions.getLayerLevel());           
            }

        }
    }

    private static String readOPName(final int dataPointer, final byte[] raw, final int rawStart, String name) {
        for(int ii=rawStart;ii