| /* |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| */ |
| package org.apache.batik.anim.values; |
| |
| import org.apache.batik.dom.anim.AnimationTarget; |
| |
| /** |
| * An SVG color value in the animation system. |
| * |
| * @author <a href="mailto:cam%40mcc%2eid%2eau">Cameron McCormack</a> |
| * @version $Id$ |
| */ |
| public class AnimatableColorValue extends AnimatableValue { |
| |
| /** |
| * The red component. |
| */ |
| protected float red; |
| |
| /** |
| * The green component. |
| */ |
| protected float green; |
| |
| /** |
| * The blue component. |
| */ |
| protected float blue; |
| |
| /** |
| * Creates a new AnimatableColorValue. |
| */ |
| protected AnimatableColorValue(AnimationTarget target) { |
| super(target); |
| } |
| |
| /** |
| * Creates a new AnimatableColorValue. |
| */ |
| public AnimatableColorValue(AnimationTarget target, |
| float r, float g, float b) { |
| super(target); |
| red = r; |
| green = g; |
| blue = b; |
| } |
| |
| /** |
| * Performs interpolation to the given value. |
| */ |
| public AnimatableValue interpolate(AnimatableValue result, |
| AnimatableValue to, |
| float interpolation, |
| AnimatableValue accumulation, |
| int multiplier) { |
| AnimatableColorValue res; |
| if (result == null) { |
| res = new AnimatableColorValue(target); |
| } else { |
| res = (AnimatableColorValue) result; |
| } |
| |
| float oldRed = res.red; |
| float oldGreen = res.green; |
| float oldBlue = res.blue; |
| |
| res.red = red; |
| res.green = green; |
| res.blue = blue; |
| |
| AnimatableColorValue toColor = (AnimatableColorValue) to; |
| AnimatableColorValue accColor = (AnimatableColorValue) accumulation; |
| |
| // XXX Should handle non-sRGB colours and non-sRGB interpolation. |
| |
| if (to != null) { |
| res.red += interpolation * (toColor.red - res.red); |
| res.green += interpolation * (toColor.green - res.green); |
| res.blue += interpolation * (toColor.blue - res.blue); |
| } |
| |
| if (accumulation != null) { |
| res.red += multiplier * accColor.red; |
| res.green += multiplier * accColor.green; |
| res.blue += multiplier * accColor.blue; |
| } |
| |
| if (res.red != oldRed || res.green != oldGreen || res.blue != oldBlue) { |
| res.hasChanged = true; |
| } |
| return res; |
| } |
| |
| /** |
| * Returns whether two values of this type can have their distance |
| * computed, as needed by paced animation. |
| */ |
| public boolean canPace() { |
| return true; |
| } |
| |
| /** |
| * Returns the absolute distance between this value and the specified other |
| * value. |
| */ |
| public float distanceTo(AnimatableValue other) { |
| AnimatableColorValue o = (AnimatableColorValue) other; |
| float dr = red - o.red; |
| float dg = green - o.green; |
| float db = blue - o.blue; |
| return (float) Math.sqrt(dr * dr + dg * dg + db * db); |
| } |
| |
| /** |
| * Returns a zero value of this AnimatableValue's type. |
| */ |
| public AnimatableValue getZeroValue() { |
| return new AnimatableColorValue(target, 0f, 0f, 0f); |
| } |
| |
| /** |
| * Returns the CSS text representation of the value. |
| */ |
| public String getCssText() { |
| return "rgb(" + Math.round(red * 255) + ',' |
| + Math.round(green * 255) + ',' |
| + Math.round(blue * 255) + ')'; |
| } |
| } |