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/*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package com.sun.opengl.impl.packrect;
/** Represents a rectangular region on the backing store. The edges of
the rectangle are the infinitely thin region between adjacent
pixels on the screen. The origin of the rectangle is its
upper-left corner. It is inclusive of the pixels on the top and
left edges and exclusive of the pixels on the bottom and right
edges. For example, a rect at position (0, 0) and of size (1, 1)
would include only the pixel at (0, 0). <P>
Negative coordinates and sizes are not supported, since they make
no sense in the context of the packer, which deals only with
positively sized regions. <P>
This class contains a user data field for efficient hookup to
external data structures as well as enough other hooks to
efficiently plug into the rectangle packer. */
public class Rect {
private int x;
private int y;
private int w;
private int h;
// The level we're currently installed in in the parent
// RectanglePacker, or null if not hooked in to the table yet
private Level level;
// The user's object this rectangle represents.
private Object userData;
// Used transiently during re-layout of the backing store (when
// there is no room left due either to fragmentation or just being
// out of space)
private Rect nextLocation;
public Rect() {
this(null);
}
public Rect(Object userData) {
this(0, 0, 0, 0, userData);
}
public Rect(int x, int y, int w, int h, Object userData) {
setPosition(x, y);
setSize(w, h);
setUserData(userData);
}
public int x() { return x; }
public int y() { return y; }
public int w() { return w; }
public int h() { return h; }
public Object getUserData() { return userData; }
public Rect getNextLocation() { return nextLocation; }
public void setPosition(int x, int y) {
if (x < 0)
throw new IllegalArgumentException("Negative x");
if (y < 0)
throw new IllegalArgumentException("Negative y");
this.x = x;
this.y = y;
}
public void setSize(int w, int h) throws IllegalArgumentException {
if (w < 0)
throw new IllegalArgumentException("Negative width");
if (h < 0)
throw new IllegalArgumentException("Negative height");
this.w = w;
this.h = h;
}
public void setUserData(Object obj) { userData = obj; }
public void setNextLocation(Rect nextLocation) { this.nextLocation = nextLocation; }
// Helpers for computations.
/** Returns the maximum x-coordinate contained within this
rectangle. Note that this returns a different result than Java
2D's rectangles; for a rectangle of position (0, 0) and size (1,
1) this will return 0, not 1. Returns -1 if the width of this
rectangle is 0. */
public int maxX() {
if (w() < 1)
return -1;
return x() + w() - 1;
}
/** Returns the maximum y-coordinate contained within this
rectangle. Note that this returns a different result than Java
2D's rectangles; for a rectangle of position (0, 0) and size (1,
1) this will return 0, not 1. Returns -1 if the height of this
rectangle is 0. */
public int maxY() {
if (h() < 1)
return -1;
return y() + h() - 1;
}
public boolean canContain(Rect other) {
return (w() >= other.w() &&
h() >= other.h());
}
public String toString() {
return "[Rect x: " + x() + " y: " + y() + " w: " + w() + " h: " + h() + "]";
}
// Unclear whether it's a good idea to override hashCode and equals
// for these objects
/*
public boolean equals(Object other) {
if (other == null || (!(other instanceof Rect))) {
return false;
}
Rect r = (Rect) other;
return (this.x() == r.x() &&
this.y() == r.y() &&
this.w() == r.w() &&
this.h() == r.h());
}
public int hashCode() {
return (x + y * 13 + w * 17 + h * 23);
}
*/
}
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