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/*
* Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.prism.paint;
import com.sun.prism.paint.Paint.Type;
import java.nio.ByteBuffer;
/**
* An immutable color, represented by four floating point values.
* The color components should be provided in non-premultiplied format.
*/
public final class Color extends Paint {
public static final Color WHITE = new Color(1f, 1f, 1f, 1f);
public static final Color BLACK = new Color(0f, 0f, 0f, 1f);
public static final Color RED = new Color(1f, 0f, 0f, 1f);
public static final Color GREEN = new Color(0f, 1f, 0f, 1f);
public static final Color BLUE = new Color(0f, 0f, 1f, 1f);
public static final Color TRANSPARENT = new Color(0f, 0f, 0f, 0f);
private final int argb;
private final float r;
private final float g;
private final float b;
private final float a;
/**
* Constructs a new {@code Color} instance.
* The color components should be provided in non-premultiplied format.
*/
public Color(float r, float g, float b, float a) {
super(Type.COLOR, false, false);
int ia = (int)(255.0 * a);
int ir = (int)(255.0 * r * a);
int ig = (int)(255.0 * g * a);
int ib = (int)(255.0 * b * a);
this.argb = (ia << 24) |(ir << 16) | (ig << 8) | (ib << 0);
this.r = r;
this.g = g;
this.b = b;
this.a = a;
}
/**
* Returns this color value (in premultiplied form) packed into an integer
* in ARGB order.
*/
public int getIntArgbPre() {
return argb;
}
/**
* Stores the color components (in premultiplied form) of this
* {@code Color} object into a byte array in RGBA order.
*/
public void putRgbaPreBytes(byte[] arr, int offset) {
arr[offset+0] = (byte)((argb >> 16) & 0xff);
arr[offset+1] = (byte)((argb >> 8) & 0xff);
arr[offset+2] = (byte)((argb ) & 0xff);
arr[offset+3] = (byte)((argb >> 24) & 0xff);
}
/**
* Stores the color components (in premultiplied form) of this
* {@code Color} object into the given ByteBuffer in BGRA order.
*/
public void putBgraPreBytes(ByteBuffer buf) {
buf.put((byte)((argb ) & 0xff));
buf.put((byte)((argb >> 8) & 0xff));
buf.put((byte)((argb >> 16) & 0xff));
buf.put((byte)((argb >> 24) & 0xff));
}
/**
* Returns the red component of this {@code Color} in
* non-premultiplied form.
*/
public float getRed() {
return r;
}
/**
* Returns the red component of this {@code Color} in
* premultiplied form.
*/
public float getRedPremult() {
return r*a;
}
/**
* Returns the green component of this {@code Color} in
* non-premultiplied form.
*/
public float getGreen() {
return g;
}
/**
* Returns the green component of this {@code Color} in
* premultiplied form.
*/
public float getGreenPremult() {
return g*a;
}
/**
* Returns the blue component of this {@code Color} in
* non-premultiplied form.
*/
public float getBlue() {
return b;
}
/**
* Returns the blue component of this {@code Color} in
* premultiplied form.
*/
public float getBluePremult() {
return b*a;
}
/**
* Returns the alpha component of this {@code Color}.
*/
public float getAlpha() {
return a;
}
@Override
public boolean isOpaque() {
return a >= 1f;
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof Color)) {
return false;
}
final Color other = (Color) obj;
return
this.r == other.r &&
this.g == other.g &&
this.b == other.b &&
this.a == other.a;
}
@Override
public int hashCode() {
int hash = 3;
hash = 53 * hash + Float.floatToIntBits(this.r);
hash = 53 * hash + Float.floatToIntBits(this.g);
hash = 53 * hash + Float.floatToIntBits(this.b);
hash = 53 * hash + Float.floatToIntBits(this.a);
return hash;
}
@Override
public String toString() {
return "Color[" +
"r=" + r +
", g=" + g +
", b=" + b +
", a=" + a +
"]";
}
}
