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91 lines
3.3 KiB
Java
91 lines
3.3 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Android code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Wes Johnston <wjohnston@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package org.mozilla.gecko.gfx;
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import android.graphics.Color;
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import android.graphics.Bitmap;
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import java.lang.Math;
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import android.util.Log;
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public final class BitmapUtils {
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public static int getDominantColor(Bitmap source) {
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int[] colors = new int[37];
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int[] sat = new int[11];
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int[] val = new int[11];
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int maxH = 0;
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int maxS = 0;
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int maxV = 0;
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if (source == null)
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return Color.argb(255,255,255,255);
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for (int row = 0; row < source.getHeight(); row++) {
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for (int col = 0; col < source.getWidth(); col++) {
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int c = source.getPixel(col, row);
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if (Color.alpha(c) < 128)
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continue;
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float[] hsv = new float[3];
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Color.colorToHSV(c, hsv);
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// arbitrarily chosen values for "white" and "black"
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if (hsv[1] > 0.35f && hsv[2] > 0.35f) {
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int h = Math.round(hsv[0] / 10.0f);
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int s = Math.round(hsv[1] * 10.0f);
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int v = Math.round(hsv[2] * 10.0f);
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colors[h]++;
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sat[s]++;
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val[v]++;
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// we only care about the most unique non white or black hue, but also
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// store its saturation and value params to match the color better
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if (colors[h] > colors[maxH]) {
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maxH = h;
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maxS = s;
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maxV = v;
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}
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}
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}
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}
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float[] hsv = new float[3];
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hsv[0] = maxH*10.0f;
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hsv[1] = (float)maxS/10.0f;
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hsv[2] = (float)maxV/10.0f;
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return Color.HSVToColor(hsv);
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}
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}
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