/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* *
* AndroidWorld Library, Copyright 2011 Bryan Chadwick *
* *
* FILE: ./android/image/Overlay.java *
* *
* This file is part of AndroidWorld. *
* *
* AndroidWorld is free software: you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation, either version *
* 3 of the License, or (at your option) any later version. *
* *
* AndroidWorld 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with AndroidWorld. If not, see . *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
package android.image;
import android.graphics.Canvas;
/**
*
*
* Represents the Overlaying of two or more images.
*
*
* new Overlay(new Rectangle(30, 60, "solid", "orange"),
* new Ellipse(60, 30, "solid", "purple"))
* 
*
*
*
*
* new Overlay(new Ellipse(10, 10, "solid", "red"),
* new Ellipse(20, 20, "solid", "black"),
* new Ellipse(30, 30, "solid", "red"),
* new Ellipse(40, 40, "solid", "black"),
* new Ellipse(50, 50, "solid", "red"),
* new Ellipse(60, 60, "solid", "black"))
* 
*
*
*
*
* new Overlay(new RegularPolygon(20, 5, "solid", "#3232FF"),
* new RegularPolygon(26, 5, "solid", "#6464FF"),
* new RegularPolygon(32, 5, "solid", "#9696FF"),
* new RegularPolygon(38, 5, "solid", "#C8C8FF"),
* new RegularPolygon(44, 5, "solid", "#FAFAFF"))
* 
*
*
*
* Image overlays are also available as a method on Images.
*
*
* new Ellipse(60, 30, "solid", "purple")
* .overlay(new Rectangle(30, 60, "solid", "orange"))
* 
*
*
*
*
* new Ellipse(60, 60, "solid", "black")
* .overlay(new Ellipse(10, 10, "solid", "red"),
* new Ellipse(20, 20, "solid", "black"),
* new Ellipse(30, 30, "solid", "red"),
* new Ellipse(40, 40, "solid", "black"),
* new Ellipse(50, 50, "solid", "red"))
* 
*
*
*
*
* new RegularPolygon(44, 5, "solid", "#FAFAFF")
* .overlay(new RegularPolygon(20, 5, "solid", "#3232FF"),
* new RegularPolygon(26, 5, "solid", "#6464FF"),
* new RegularPolygon(32, 5, "solid", "#9696FF"),
* new RegularPolygon(38, 5, "solid", "#C8C8FF"))
* 
*
*
*/
public class Overlay extends Image{
protected Image top;
protected Image bot;
protected double width;
protected double height;
/** Construct an Overlay from the two or more Images */
public Overlay(Image top, Image next, Image ... imgs){
this(top, imgs.length==0?next:make(next, imgs, 0));
}
/** Construct an Overlay from the two Images */
protected Overlay(Image top, Image bot){
this(top, bot,
(Math.max(top.leftOfPin(),bot.leftOfPin())+
Math.max(top.rightOfPin(),bot.rightOfPin())),
(Math.max(top.upOfPin(),bot.upOfPin())+
Math.max(top.downOfPin(),bot.downOfPin())));
}
/** Construct an Overlay from the two Images with the given width and height */
protected Overlay(Image top, Image bot, double width, double height){
super(width/2, height/2);
this.top = top;
this.bot = bot;
this.width = width;
this.height = height;
}
/** Make a layered Image with top t and bottoms of imgs[i..] */
private static Image make(Image t, Image[] imgs, int i){
if(i == imgs.length)
return t;
return new Overlay(t, make(imgs[i], imgs, i+1));
}
/** Draw this Overlay image into a Graphics */
public void paint(Canvas c, int xx, int yy){
bot.paint(c, xx, yy);
top.paint(c, xx, yy);
}
/** Return the width of this Image */
public int width(){ return ceil(width); }
/** Return the height of this Image */
public int height(){ return ceil(height); }
}