/******************************************************************************* * Copyright (c) 2015, 2016 IBM Corporation and others. * * This program and the accompanying materials * are made available under the terms of the Eclipse Public License 2.0 * which accompanies this distribution, and is available at * https://www.eclipse.org/legal/epl-2.0/ * * SPDX-License-Identifier: EPL-2.0 * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.swt.graphics; import java.io.*; import org.eclipse.swt.*; /** * Instances of this class are descriptions of colors in * terms of the primary additive color model (red, green, blue * and alpha). A color may be described in terms of the relative * intensities of these three primary colors. The brightness * of each color is specified by a value in the range 0 to 255, * where 0 indicates no color (blackness) and 255 indicates * maximum intensity and for alpha 0 indicates transparent and * 255 indicates opaque. *
* The hashCode() method in this class uses the values of the public * fields to compute the hash value. When storing instances of the * class in hashed collections, do not modify these fields after the * object has been inserted. *
*
* Application code does not need to explicitly release the
* resources managed by each instance when those instances are no longer
* required, and thus no dispose()
method is provided.
*
true
if the object is the same as this object and false
otherwise
*
* @see #hashCode()
*/
@Override
public boolean equals(Object object) {
if (object == this) return true;
if (!(object instanceof RGBA)) return false;
RGBA rgba = (RGBA)object;
return (rgba.rgb.red == this.rgb.red) && (rgba.rgb.green == this.rgb.green) && (rgba.rgb.blue == this.rgb.blue)
&& (rgba.alpha == this.alpha);
}
/**
* Returns an integer hash code for the receiver. Any two
* objects that return true
when passed to
* equals
must return the same value for this
* method.
*
* @return the receiver's hash
*
* @see #equals(Object)
*/
@Override
public int hashCode() {
return (alpha << 24) | (rgb.blue << 16) | (rgb.green << 8) | rgb.red;
}
/**
* Returns a string containing a concise, human-readable
* description of the receiver.
*
* @return a string representation of the RGBA
*/
@Override
public String toString() {
return "RGBA {" + rgb.red + ", " + rgb.green + ", " + rgb.blue + ", " + alpha + "}"; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
}
}