PaintBorderFilter.java

/* 
 * HaoRan ImageFilter Classes v0.2
 * Copyright (C) 2012 Zhenjun Dai
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation.
 */

package com.marshalchen.common.uimodule.ImageFilter;

import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.text.SimpleDateFormat;
import java.util.Date;

import com.marshalchen.common.uimodule.ImageFilter.ImageBlender.BlendMode;
import android.util.Log;

/**
 * lomo��
 * @author daizhj
 *
 */

public class PaintBorderFilter implements IImageFilter{
	   /// <summary>
    /// Should be in the range [0, 10].
    /// </summary>
    public float Size = 1f;
    public int R, G, B;
    public PaintBorderFilter(int color) /*color reference http://www.wescn.com/tool/color_3.html*/
    {
        R = (color & 0x00FF0000) >> 16;
        G = (color & 0x0000FF00) >> 8;
        B = (color & 0x000000FF);
    }

    public PaintBorderFilter(int color, float size)
    {
    	this(color);
        Size = size;
    }

    //@Override
    public Image process(Image imageIn)
    {
        int r, g, b;
        int width = imageIn.getWidth();
        int height = imageIn.getHeight();
        int ratio = width > height ? height * 32768 / width : width * 32768 / height;

        // Calculate center, min and max
        int cx = width >> 1;
        int cy = height >> 1;
        int max = cx * cx + cy * cy;
        int min = (int)(max * (1 - Size));
        int diff = max - min;
        Image clone = imageIn.clone();
        for (int x = 0; x < width; x++)
        {
            for (int y = 0; y < height; y++)
            {
                // Calculate distance to center and adapt aspect ratio
                int dx = cx - x;
                int dy = cy - y;
                if (width > height)
                    dx = (dx * ratio) >> 15;
                else
                    dy = (dy * ratio) >> 15;
                int distSq = dx * dx + dy * dy;

                r = (int)((((float)distSq / diff) * R));
                g = (int)((((float)distSq / diff) * G));
                b = (int)((((float)distSq / diff) * B));
                r = (r > R ? R : (r < 0 ? 0 : r));
                g = (g > G ? G : (g < 0 ? 0 : g));
                b = (b > B ? B : (b < 0 ? 0 : b));
                imageIn.setPixelColor(x, y, r, g, b);
            }
        }
        ImageBlender blender = new ImageBlender();
        blender.Mode = BlendMode.Additive;
        return blender.Blend(clone, imageIn);
    }
}