Android Bitmap Blur blur(int[] in, int[] out, int width, int height, float radius)

Description

blur

Declaration

public static void blur(int[] in, int[] out, int width, int height,
            float radius) 

Method Source Code

//package com.java2s;

public class Main {
    public static void blur(int[] in, int[] out, int width, int height,
            float radius) {
        int widthMinus1 = width - 1;
        int r = (int) radius;
        int tableSize = 2 * r + 1;
        int divide[] = new int[256 * tableSize];

        for (int i = 0; i < 256 * tableSize; i++)
            divide[i] = i / tableSize;/*from   www. j av  a2s . co  m*/

        int inIndex = 0;

        for (int y = 0; y < height; y++) {
            int outIndex = y;
            int ta = 0, tr = 0, tg = 0, tb = 0;

            for (int i = -r; i <= r; i++) {
                int rgb = in[inIndex + clamp(i, 0, width - 1)];
                ta += (rgb >> 24) & 0xff;
                tr += (rgb >> 16) & 0xff;
                tg += (rgb >> 8) & 0xff;
                tb += rgb & 0xff;
            }

            for (int x = 0; x < width; x++) {
                out[outIndex] = (divide[ta] << 24) | (divide[tr] << 16)
                        | (divide[tg] << 8) | divide[tb];

                int i1 = x + r + 1;
                if (i1 > widthMinus1)
                    i1 = widthMinus1;
                int i2 = x - r;
                if (i2 < 0)
                    i2 = 0;
                int rgb1 = in[inIndex + i1];
                int rgb2 = in[inIndex + i2];

                ta += ((rgb1 >> 24) & 0xff) - ((rgb2 >> 24) & 0xff);
                tr += ((rgb1 & 0xff0000) - (rgb2 & 0xff0000)) >> 16;
                tg += ((rgb1 & 0xff00) - (rgb2 & 0xff00)) >> 8;
                tb += (rgb1 & 0xff) - (rgb2 & 0xff);
                outIndex += height;
            }
            inIndex += width;
        }
    }

    public static int clamp(int x, int a, int b) {
        return (x < a) ? a : (x > b) ? b : x;
    }
}

Related

1. blurFilter(Bitmap bmp)
2. blur(int[] in, int[] out, int width, int height, float radius)
3. blurred(Bitmap source)
4. fastblur(Context context, Bitmap sentBitmap, int radius)
5. BoxBlurFilter(Bitmap bmp)
6. blurFractional(int[] in, int[] out, int width, int height, float radius)