android 图片LOMO成效

import android.graphics.Bitmap;import android.graphics.Color;public class LomoFilter {	public static Bitmap filter(Bitmap bitmap){		int width = bitmap.getWidth();    	int height = bitmap.getHeight();    	int dst[] = new int[width*height];    	bitmap.getPixels(dst, 0, width, 0, 0, width, height);    	    	int ratio = width > height ? height*32768/width : width*32768/height;    	int cx = width >> 1;		int cy = height >> 1;		int max = cx * cx + cy * cy;		int min = (int) (max * (1 - 0.8f));		int diff = max - min;				int ri, gi, bi;    	int dx, dy, distSq, v;    	    	int R, G, B;    	    	int value;    	int pos, pixColor;    	int newR, newG, newB;    	for(int y=0; y<height; y++){    		for(int x=0; x<width; x++){    			pos = y*width + x;    			pixColor = dst[pos];    			R = Color.red(pixColor);		    			G = Color.green(pixColor);		    			B = Color.blue(pixColor);    			    			value = R<128 ? R : 256-R;    			newR = (value*value*value)/64/256;    			newR = (R<128 ? newR : 255-newR);    			    			value = G<128 ? G : 256-G;    			newG = (value*value)/128;    			newG = (G<128 ? newG : 255-newG);    			    			newB = B/2 + 0x25;	    			    			//==========边缘黑暗==============//    			dx = cx - x;				dy = cy - y;				if (width > height) 					dx = (dx * ratio) >> 15;				else 					dy = (dy * ratio) >> 15;    			    			distSq = dx * dx + dy * dy;    			if (distSq > min){                    v = ((max - distSq) << 8) / diff;                    v *= v;                    ri = (int)(newR * v) >> 16;                    gi = (int)(newG * v) >> 16;                    bi = (int)(newB * v) >> 16;                    newR = ri > 255 ? 255 : (ri < 0 ? 0 : ri);                    newG = gi > 255 ? 255 : (gi < 0 ? 0 : gi);                    newB = bi > 255 ? 255 : (bi < 0 ? 0 : bi);	            }    			//==========边缘黑暗end==============//    			    			dst[pos] = Color.rgb(newR, newG, newB);    		}    	}    	Bitmap acrossFlushBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);    	acrossFlushBitmap.setPixels(dst, 0, width, 0, 0, width, height);    	return acrossFlushBitmap;	}}