org.jpedal.render.ClipUtils Maven / Gradle / Ivy
/*
* ===========================================
* 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
*
* ---------------
* ClipUtils.java
* ---------------
*/
package org.jpedal.render;
import java.awt.geom.AffineTransform;
import java.awt.geom.Area;
/**
* static helper methods for Clip code
*/
public class ClipUtils {
/**
* Increases clip size without altering input area
* @param clip The clipping areas that needs increasing
* @return Area for the modified clip size
*/
public static Area convertPDFClipToJavaClip(final Area clip){
if (clip != null) {
//Increase clips size by 1 pixel in all direction as pdf clip includes bounds,
//java only handles inside of bounds
double sx = (clip.getBounds2D().getWidth() + 2) / clip.getBounds2D().getWidth();
double sy = (clip.getBounds2D().getHeight() + 2) / clip.getBounds2D().getHeight();
double posX = clip.getBounds2D().getX();
double posY = clip.getBounds2D().getY();
Area a = (Area) clip.clone();
a.transform(AffineTransform.getTranslateInstance(-posX, -posY));
a.transform(AffineTransform.getScaleInstance(sx, sy));
a.transform(AffineTransform.getTranslateInstance(posX - 1, posY - 1));
return a;
}
return clip;
}
}