--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/graphics/RGB.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,226 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+module dwt.graphics.RGB;
+
+import dwt.dwthelper.utils;
+
+import dwt.DWT;
+import dwt.internal.SerializableCompatibility;
+
+/**
+ * Instances of this class are descriptions of colors in
+ * terms of the primary additive color model (red, green and
+ * blue). 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.
+ * <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
+ */
+
+public final class RGB implements SerializableCompatibility {
+    
+    /**
+     * the red component of the RGB
+     */
+    public int red;
+    
+    /**
+     * the green component of the RGB
+     */
+    public int green;
+    
+    /**
+     * the blue component of the RGB
+     */
+    public int blue;
+    
+    static final long serialVersionUID = 3258415023461249074L;
+    
+/**
+ * Constructs an instance of this class with the given
+ * red, green and blue 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
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the red, green or blue argument is not between 0 and 255</li>
+ * </ul>
+ */
+public RGB(int red, int green, int blue) {
+    if ((red > 255) || (red < 0) ||
+        (green > 255) || (green < 0) ||
+        (blue > 255) || (blue < 0))
+            DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    this.red = red;
+    this.green = green;
+    this.blue = blue;
+}
+
+/**
+* Constructs an instance of this class with the given
+* hue, saturation, and brightness.
+*
+* @param hue the hue value for the HSB color (from 0 to 360)
+* @param saturation the saturation value for the HSB color (from 0 to 1)
+* @param brightness the brightness value for the HSB color (from 0 to 1)
+*
+* @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</li>
+* </ul>
+* 
+* @since 3.2
+*/
+public RGB(float hue, float saturation, float brightness) {
+    if (hue < 0 || hue > 360 || saturation < 0 || saturation > 1 || 
+        brightness < 0 || brightness > 1) {
+        DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    }
+    float r, g, b;
+    if (saturation is 0) {
+        r = g = b = brightness; 
+    } else {
+        if (hue is 360) hue = 0;
+        hue /= 60;  
+        int i = (int)hue;
+        float f = hue - i;
+        float p = brightness * (1 - saturation);
+        float q = brightness * (1 - saturation * f);
+        float t = brightness * (1 - saturation * (1 - f));
+        switch(i) {
+            case 0:
+                r = brightness;
+                g = t;
+                b = p;
+                break;
+            case 1:
+                r = q;
+                g = brightness;
+                b = p;
+                break;
+            case 2:
+                r = p;
+                g = brightness;
+                b = t;
+                break;
+            case 3:
+                r = p;
+                g = q;
+                b = brightness;
+                break;
+            case 4:
+                r = t;
+                g = p;
+                b = brightness;
+                break;
+            case 5:
+            default:
+                r = brightness;
+                g = p;
+                b = q;
+                break;
+        }
+    }
+    red = (int)(r * 255 + 0.5);
+    green = (int)(g * 255 + 0.5);
+    blue = (int)(b * 255 + 0.5);    
+}
+
+/**
+ * Returns the hue, saturation, and brightness of the color.
+ * 
+ * @return color space values in float format (hue, saturation, brightness)
+ *
+ * @since 3.2
+ */
+public float[] getHSB() {   
+    float r = red / 255f;
+    float g = green / 255f;
+    float b = blue / 255f;
+    float max = Math.max(Math.max(r, g), b);
+    float min = Math.min(Math.min(r, g), b);
+    float delta = max - min;
+    float hue = 0;
+    float brightness = max;
+    float saturation = max is 0 ? 0 : (max - min) / max;
+    if (delta !is 0) {
+        if (r is max) {
+            hue = (g  - b) / delta;
+        } else {
+            if (g is max) {
+                hue = 2 + (b - r) / delta;  
+            } else {
+                hue = 4 + (r - g) / delta;
+            }
+        }
+        hue *= 60;
+        if (hue < 0) hue += 360;
+    }
+    return new float[] {hue, saturation, brightness};
+}   
+
+/**
+ * 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()
+ */
+public bool equals(Object object) {
+    if (object is this) return true;
+    if (!(object instanceof RGB)) return false;
+    RGB rgb = (RGB)object;
+    return (rgb.red is this.red) && (rgb.green is this.green) && (rgb.blue is this.blue);
+}
+
+/**
+ * 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)
+ */
+public int hashCode() {
+    return (blue << 16) | (green << 8) | red;
+}
+
+/**
+ * Returns a string containing a concise, human-readable
+ * description of the receiver.
+ *
+ * @return a string representation of the <code>RGB</code>
+ */
+public String toString() {
+    return "RGB {" + red + ", " + green + ", " + blue + "}"; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
+}
+
+}