--- /dev/null
+/*******************************************************************************
+ * 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.
+ * <p>
+ * 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.
+ * </p>
+ * <p>
+ * Application code does <em>not</em> need to explicitly release the
+ * resources managed by each instance when those instances are no longer
+ * required, and thus no <code>dispose()</code> method is provided.
+ * </p>
+ *
+ * @see Color
+ * @see <a href="http://www.eclipse.org/swt/snippets/#color">Color and RGB snippets</a>
+ * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
+ * @since 3.104
+ */
+public final class RGBA implements Serializable {
+ /**
+ * the RGB component of the RGBA
+ */
+ public final RGB rgb;
+
+ /**
+ * the alpha component of the RGBA
+ */
+ public int alpha;
+
+ static final long serialVersionUID = 1049467103126495855L;
+
+/**
+ * Constructs an instance of this class with the given
+ * red, green, blue and alpha values.
+ *
+ * @param red the red component of the new instance
+ * @param green the green component of the new instance
+ * @param blue the blue component of the new instance
+ * @param alpha the alpha component of the new instance
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the red, green, blue or alpha argument is not between 0 and 255</li>
+ * </ul>
+ */
+public RGBA(int red, int green, int blue, int alpha) {
+ if ((alpha > 255) || (alpha < 0)) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ this.rgb = new RGB (red, green, blue);
+ this.alpha = alpha;
+}
+
+/**
+* Constructs an instance of this class with the given
+* hue, saturation, and brightness.
+*
+* @param hue the hue value for the HSBA color (from 0 to 360)
+* @param saturation the saturation value for the HSBA color (from 0 to 1)
+* @param brightness the brightness value for the HSBA color (from 0 to 1)
+* @param alpha the alpha value for the HSBA color (from 0 to 255)
+*
+* @exception IllegalArgumentException <ul>
+* <li>ERROR_INVALID_ARGUMENT - if the hue is not between 0 and 360 or
+* the saturation or brightness is not between 0 and 1 or if the alpha
+* is not between 0 and 255</li>
+* </ul>
+*
+*/
+public RGBA(float hue, float saturation, float brightness, float alpha) {
+ if ((alpha > 255) || (alpha < 0)) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ rgb = new RGB(hue, saturation, brightness);
+ this.alpha = (int)(alpha + 0.5);
+}
+
+/**
+ * Returns the hue, saturation, and brightness of the color.
+ *
+ * @return color space values in float format:<ul>
+ * <li>hue (from 0 to 360)</li>
+ * <li>saturation (from 0 to 1)</li>
+ * <li>brightness (from 0 to 1)</li>
+ * <li>alpha (from 0 to 255)</li>
+ * </ul>
+ * @see #RGBA(float, float, float, float)
+ */
+public float[] getHSBA() {
+ float[] hsb = rgb.getHSB();
+ return new float[] {hsb[0], hsb[1], hsb[2], alpha};
+}
+
+/**
+ * Compares the argument to the receiver, and returns true
+ * if they represent the <em>same</em> object using a class
+ * specific comparison.
+ *
+ * @param object the object to compare with this object
+ * @return <code>true</code> if the object is the same as this object and <code>false</code> 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 <code>true</code> when passed to
+ * <code>equals</code> 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 <code>RGBA</code>
+ */
+@Override
+public String toString() {
+ return "RGBA {" + rgb.red + ", " + rgb.green + ", " + rgb.blue + ", " + alpha + "}"; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
+}
+
+}
Code Review / simantics / platform.git / blobdiff