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 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
@LICENSE@
*
* ---------------
* 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
final double sx = (clip.getBounds2D().getWidth() + 2) / clip.getBounds2D().getWidth();
final double sy = (clip.getBounds2D().getHeight() + 2) / clip.getBounds2D().getHeight();
final double posX = clip.getBounds2D().getX();
final double posY = clip.getBounds2D().getY();
final 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;
}
}