| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed 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 com.android.cts.systemui; |
| |
| /** |
| * Copies of non-public {@link android.graphics.Color} APIs |
| */ |
| public class ColorUtils { |
| |
| public static float brightness(int argb) { |
| int r = (argb >> 16) & 0xFF; |
| int g = (argb >> 8) & 0xFF; |
| int b = argb & 0xFF; |
| |
| int V = Math.max(b, Math.max(r, g)); |
| |
| return (V / 255.f); |
| } |
| |
| public static float hue(int argb) { |
| int r = (argb >> 16) & 0xFF; |
| int g = (argb >> 8) & 0xFF; |
| int b = argb & 0xFF; |
| |
| int V = Math.max(b, Math.max(r, g)); |
| int temp = Math.min(b, Math.min(r, g)); |
| |
| float H; |
| |
| if (V == temp) { |
| H = 0; |
| } else { |
| final float vtemp = (float) (V - temp); |
| final float cr = (V - r) / vtemp; |
| final float cg = (V - g) / vtemp; |
| final float cb = (V - b) / vtemp; |
| |
| if (r == V) { |
| H = cb - cg; |
| } else if (g == V) { |
| H = 2 + cr - cb; |
| } else { |
| H = 4 + cg - cr; |
| } |
| |
| H /= 6.f; |
| if (H < 0) { |
| H++; |
| } |
| } |
| |
| return H; |
| } |
| } |