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Open Source (LGPL) JavaFX PDF Viewer for NetBeans plugin

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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
 *
 @LICENSE@
 *
 * ---------------
 * ConvertMaskToShape.java
 * ---------------
 */
package org.jpedal.parser.image.utils;

import java.awt.geom.GeneralPath;

import org.jpedal.objects.GraphicsState;
import org.jpedal.objects.SwingShape;
import org.jpedal.parser.Cmd;
import org.jpedal.parser.ParserOptions;
import org.jpedal.render.DynamicVectorRenderer;

public class ConvertMaskToShape {

    public static void convert(final GraphicsState gs, final DynamicVectorRenderer current, final ParserOptions parserOptions) {

        float ix = gs.CTM[2][0];
        float iy = gs.CTM[2][1];

        float ih = gs.CTM[1][1];
        if (ih == 0) {
            ih = gs.CTM[1][0];
        }
        if (ih < 0) {
            iy += ih;
            ih = -ih;
        }

        float iw = gs.CTM[0][0];
        if (iw == 0) {
            iw = gs.CTM[0][1];
        }
        if (iw < 0) {
            ix += iw;
            iw = -iw;
        }

        //factor in GS rotation and swap w and h
        if (gs.CTM[0][0] == 0 && gs.CTM[0][1] > 0 && gs.CTM[1][0] != 0 && gs.CTM[1][1] == 0) {
            final float tmp = ih;
            ih = iw;
            iw = tmp;
        }

        //allow for odd values less than 1 and ensure minimum width
        if (iw < 1) {
            iw = 1;
        }
        if (ih < 1) {
            ih = 1;
        }

        int lwidth = -1;

        //for thin lines, use line width to ensure appears
        if (ih < 3) {

            lwidth = (int) ih;
            ih = 1;
        } else if (iw < 3) {
            lwidth = (int) iw;
            iw = 1;
        }

        final GeneralPath currentShape = new GeneralPath(GeneralPath.WIND_NON_ZERO);

        currentShape.moveTo(ix, iy);
        currentShape.lineTo(ix, iy + ih);
        currentShape.lineTo(ix + iw, iy + ih);
        currentShape.lineTo(ix + iw, iy);
        currentShape.closePath();

        //save for later
        if (parserOptions.isRenderPage() && currentShape != null) {

            final float lastLineWidth = gs.getLineWidth();

            if (lwidth > 0) {
                gs.setLineWidth(lwidth);
            }

            gs.setNonstrokeColor(gs.nonstrokeColorSpace.getColor());
            gs.setFillType(GraphicsState.FILL);

            current.drawShape(new SwingShape(currentShape), gs, Cmd.F);

            //restore after draw
            if (lwidth > 0) {
                gs.setLineWidth(lastLineWidth);
            }

        }
    }


}