Apply sunshine style to Bitmap - Android Graphics

Android examples for Graphics:Bitmap Effect

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Description

Apply sunshine style to Bitmap

Demo Code

/**/*  ww w.  j av a2s .co  m*/
 * Copyright 2014 Zhenguo Jin
 *
 * 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.java2s;

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;

import android.graphics.Color;

public class Main {

    public static Bitmap sunshine(Bitmap bitmap, int centerX, int centerY) {
        final int width = bitmap.getWidth();
        final int height = bitmap.getHeight();
        Bitmap newBitmap = Bitmap.createBitmap(width, height,
                Config.RGB_565);

        int pixR = 0;
        int pixG = 0;
        int pixB = 0;

        int pixColor = 0;

        int newR = 0;
        int newG = 0;
        int newB = 0;
        int radius = Math.min(centerX, centerY);

        final float strength = 150F; //  100~150
        int[] pixels = new int[width * height];
        bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
        int pos = 0;
        for (int i = 1, length = height - 1; i < length; i++) {
            for (int k = 1, len = width - 1; k < len; k++) {
                pos = i * width + k;
                pixColor = pixels[pos];

                pixR = Color.red(pixColor);
                pixG = Color.green(pixColor);
                pixB = Color.blue(pixColor);

                newR = pixR;
                newG = pixG;
                newB = pixB;

                // 
                int distance = (int) (Math.pow((centerY - i), 2) + Math
                        .pow(centerX - k, 2));
                if (distance < radius * radius) {
                    // 
                    int result = (int) (strength * (1.0 - Math
                            .sqrt(distance) / radius));
                    newR = pixR + result;
                    newG = pixG + result;
                    newB = pixB + result;
                }

                newR = Math.min(255, Math.max(0, newR));
                newG = Math.min(255, Math.max(0, newG));
                newB = Math.min(255, Math.max(0, newB));

                pixels[pos] = Color.argb(255, newR, newG, newB);
            }
        }

        newBitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return newBitmap;
    }
}

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