Android Open Source - FPlayAndroid Color Utils






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The source code is released under:

Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the followin...

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Java Source Code

//
// FPlayAndroid is distributed under the FreeBSD License
///* www. java  2s .  c  om*/
// Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.
//
// https://github.com/carlosrafaelgn/FPlayAndroid
//
package br.com.carlosrafaelgn.fplay.util;

public final class ColorUtils {
  public static final class HSV {
    public double h, s, v;
    
    public HSV() {
    }
    
    public HSV(double h, double s, double v) {
      this.h = h;
      this.s = s;
      this.v = v;
    }
    
    public void fromRGB(int rgb) {
      final double r = (double)((rgb >>> 16) & 0xff) / 255.0,
      g = (double)((rgb >>> 8) & 0xff) / 255.0,
      b = (double)(rgb & 0xff) / 255.0,
      max = Math.max(Math.max(r, g), b),
      min = Math.min(Math.min(r, g), b);
      h = 0;
      s = ((max == 0) ? 0 : ((max - min) / max));
      v = max;
      if (max != min) {
        if (max == r) {
          if (g >= b)
            h = (60.0 * ((g - b) / (max - min))) / 360.0;
          else
            h = ((60.0 * ((g - b) / (max - min))) + 360.0) / 360.0;
        } else if (max == g) {
          h = ((60.0 * ((b - r) / (max - min))) + 120.0) / 360.0;
        } else {
          h = ((60.0 * ((r - g) / (max - min))) + 240.0) / 360.0;
        }
      }
    }
    
    public int toRGB(boolean invert) {
      double h = 6.0 * this.h;
      final double v = this.v * 255.0;
      int hi, r, g, b, vi;
      if (h > 5.99) h = 0;
      hi = (int)h % 6;
      h -= (double)hi;
      r = (int)(v * (1.0 - s));
      g = (int)(v * (1.0 - (h * s)));
      b = (int)(v * (1.0 - ((1.0 - h) * s)));
      vi = (int)v;
      switch (hi) {
        case 1:
          b = r;
          r = g;
          g = vi;
          break;
        case 2:
          g = vi;
          break;
        case 3:
          b = vi;
          break;
        case 4:
          g = r;
          r = b;
          b = vi;
          break;
        case 5:
          b = g;
          g = r;
          r = vi;
          break;
        default:
          g = b;
          b = r;
          r = vi;
          break;
      }
      return 0xff000000 | (invert ? (((b >= 255) ? 255 : b) << 16) | (((g >= 255) ? 255 : g) << 8) | ((r >= 255) ? 255 : r) :
          (((r >= 255) ? 255 : r) << 16) | (((g >= 255) ? 255 : g) << 8) | ((b >= 255) ? 255 : b));
    }
  }
  
  public static int blend(int rgb1, int rgb2, float perc1) {
    int r1 = (rgb1 >>> 16) & 0xff;
    final int r2 = (rgb2 >>> 16) & 0xff;
    int g1 = (rgb1 >>> 8) & 0xff;
    final int g2 = (rgb2 >>> 8) & 0xff;
    int b1 = rgb1 & 0xff;
    final int b2 = rgb2 & 0xff;
    final float perc2 = 1.0f - perc1;
    r1 = (int)(((float)r1 * perc1) + ((float)r2 * perc2));
    g1 = (int)(((float)g1 * perc1) + ((float)g2 * perc2));
    b1 = (int)(((float)b1 * perc1) + ((float)b2 * perc2));
    if (r1 > 255)
      r1 = 255;
    else if (r1 < 0)
      r1 = 0;
    if (g1 > 255)
      g1 = 255;
    else if (g1 < 0)
      g1 = 0;
    if (b1 > 255)
      b1 = 255;
    else if (b1 < 0)
      b1 = 0;
    return 0xff000000 | (r1 << 16) | (g1 << 8) | b1;
  }
  
  public static double relativeLuminance(int rgb) {
    //http://www.w3.org/TR/2007/WD-WCAG20-TECHS-20070517/Overview.html#G18
    double RsRGB = (double)((rgb >>> 16) & 0xff) / 255.0,
    GsRGB = (double)((rgb >>> 8) & 0xff) / 255.0,
    BsRGB = (double)(rgb & 0xff) / 255.0,
    R, G, B;
    if (RsRGB <= 0.03928) R = RsRGB / 12.92; else R = Math.pow((RsRGB + 0.055) / 1.055, 2.4);
    if (GsRGB <= 0.03928) G = GsRGB / 12.92; else G = Math.pow((GsRGB + 0.055) / 1.055, 2.4);
    if (BsRGB <= 0.03928) B = BsRGB / 12.92; else B = Math.pow((BsRGB + 0.055) / 1.055, 2.4);
    return (0.2126 * R) + (0.7152 * G) + (0.0722 * B);
  }
  
  public static double contrastRatioL(double luminance1, double luminance2) {
    //http://www.w3.org/TR/2007/WD-WCAG20-TECHS-20070517/Overview.html#G18
    return (luminance1 >= luminance2) ? ((luminance1 + 0.05) / (luminance2 + 0.05)) : ((luminance2 + 0.05) / (luminance1 + 0.05));
  }
  
  public static double contrastRatio(int rgb1, int rgb2) {
    //http://www.w3.org/TR/2007/WD-WCAG20-TECHS-20070517/Overview.html#G18
    return ColorUtils.contrastRatioL(ColorUtils.relativeLuminance(rgb1), ColorUtils.relativeLuminance(rgb2));
  }
  
  public static int parseHexColor(String color) {
    try {
      if (color.charAt(0) == '#')
        color = color.substring(1);
      return 0xff000000 | (0x00ffffff & Integer.parseInt(color, 16));
    } catch (Throwable ex) {
      return 0;
    }
  }
  
  public static String toHexColor(int rgb) {
    final String s = "00000" + Integer.toHexString(rgb);
    return "#" + s.substring(s.length() - 6);
  }
}




Java Source Code List

br.com.carlosrafaelgn.fplay.ActivityAbout.java
br.com.carlosrafaelgn.fplay.ActivityBrowser2.java
br.com.carlosrafaelgn.fplay.ActivityBrowserRadio.java
br.com.carlosrafaelgn.fplay.ActivityBrowserView.java
br.com.carlosrafaelgn.fplay.ActivityEffects.java
br.com.carlosrafaelgn.fplay.ActivityFileSelection.java
br.com.carlosrafaelgn.fplay.ActivityItemView.java
br.com.carlosrafaelgn.fplay.ActivityMain.java
br.com.carlosrafaelgn.fplay.ActivitySettings.java
br.com.carlosrafaelgn.fplay.ExternalReceiver.java
br.com.carlosrafaelgn.fplay.WidgetMain.java
br.com.carlosrafaelgn.fplay.activity.ActivityHost.java
br.com.carlosrafaelgn.fplay.activity.ActivityVisualizer.java
br.com.carlosrafaelgn.fplay.activity.ClientActivity.java
br.com.carlosrafaelgn.fplay.activity.MainHandler.java
br.com.carlosrafaelgn.fplay.list.AlbumArtFetcher.java
br.com.carlosrafaelgn.fplay.list.BaseItem.java
br.com.carlosrafaelgn.fplay.list.BaseList.java
br.com.carlosrafaelgn.fplay.list.FileFetcher.java
br.com.carlosrafaelgn.fplay.list.FileList.java
br.com.carlosrafaelgn.fplay.list.FileSt.java
br.com.carlosrafaelgn.fplay.list.RadioStationList.java
br.com.carlosrafaelgn.fplay.list.RadioStation.java
br.com.carlosrafaelgn.fplay.list.SongList.java
br.com.carlosrafaelgn.fplay.list.Song.java
br.com.carlosrafaelgn.fplay.playback.BassBoost.java
br.com.carlosrafaelgn.fplay.playback.Equalizer.java
br.com.carlosrafaelgn.fplay.playback.MetadataExtractor.java
br.com.carlosrafaelgn.fplay.playback.Player.java
br.com.carlosrafaelgn.fplay.playback.PresetReverb.java
br.com.carlosrafaelgn.fplay.playback.Virtualizer.java
br.com.carlosrafaelgn.fplay.ui.BgButton.java
br.com.carlosrafaelgn.fplay.ui.BgColorStateList.java
br.com.carlosrafaelgn.fplay.ui.BgListView.java
br.com.carlosrafaelgn.fplay.ui.BgSeekBar.java
br.com.carlosrafaelgn.fplay.ui.BgTextView.java
br.com.carlosrafaelgn.fplay.ui.ColorPickerView.java
br.com.carlosrafaelgn.fplay.ui.CustomContextMenu.java
br.com.carlosrafaelgn.fplay.ui.FileView.java
br.com.carlosrafaelgn.fplay.ui.InterceptableLayout.java
br.com.carlosrafaelgn.fplay.ui.ObservableScrollView.java
br.com.carlosrafaelgn.fplay.ui.RadioStationView.java
br.com.carlosrafaelgn.fplay.ui.SettingView.java
br.com.carlosrafaelgn.fplay.ui.SongAddingMonitor.java
br.com.carlosrafaelgn.fplay.ui.SongView.java
br.com.carlosrafaelgn.fplay.ui.UI.java
br.com.carlosrafaelgn.fplay.ui.drawable.BorderDrawable.java
br.com.carlosrafaelgn.fplay.ui.drawable.ColorDrawable.java
br.com.carlosrafaelgn.fplay.ui.drawable.NullDrawable.java
br.com.carlosrafaelgn.fplay.ui.drawable.StateDrawable.java
br.com.carlosrafaelgn.fplay.ui.drawable.TextIconDrawable.java
br.com.carlosrafaelgn.fplay.util.ArraySorter.java
br.com.carlosrafaelgn.fplay.util.BitmapLruCache.java
br.com.carlosrafaelgn.fplay.util.BluetoothConnectionManager.java
br.com.carlosrafaelgn.fplay.util.ColorUtils.java
br.com.carlosrafaelgn.fplay.util.ReleasableBitmapWrapper.java
br.com.carlosrafaelgn.fplay.util.SafeURLSpan.java
br.com.carlosrafaelgn.fplay.util.SerializableMap.java
br.com.carlosrafaelgn.fplay.util.Serializer.java
br.com.carlosrafaelgn.fplay.util.SlimLock.java
br.com.carlosrafaelgn.fplay.util.Timer.java
br.com.carlosrafaelgn.fplay.visualizer.BluetoothVisualizerJni.java
br.com.carlosrafaelgn.fplay.visualizer.OpenGLVisualizerJni.java
br.com.carlosrafaelgn.fplay.visualizer.SimpleVisualizerJni.java
br.com.carlosrafaelgn.fplay.visualizer.VisualizerView.java
br.com.carlosrafaelgn.fplay.visualizer.Visualizer.java