/*
 * HighlightFilter.h 
 * Copyright (c) 2011 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. 
 */


// SOL++2000
#pragma once

// 2000.07.07
#include <sol\ImageFilter.h>

namespace SOL {

#define Max(a,b)    (((a) > (b)) ? (a) : (b))
#define Min(a,b)    (((a) < (b)) ? (a) : (b))

class HighlightFilter :public ImageFilter {

private:
    int    percent;

private:
    void    brighten(int& r, int& g, int& b) 
    {
        r = r + (percent * r) / 100;
        g = g + (percent * g) / 100;
        b = b + (percent * b) / 100;

        r = Min(Max(0, r), 255);
        g = Min(Max(0, g), 255);
        b = Min(Max(0, b), 255);
    }
public:
    HighlightFilter(int p) 
    {
        if (p < 0 ) 
            p = 0;
        if (p > 100) 
            p = 100;

        percent = p;
    }

public:
    DIBSection* HighlightFilter::filterRGB(DC& dc, DIBSection& image) 
    {

        int w = image.getWidth();
        int h = image.getHeight();

        DIBSection* newImage = new DIBSection(dc, w, h);

        for (int y = 0; y<h; y++) {
            for (int x = 0; x<w; x++) {
                int r = 0;
                int g = 0;
                int b = 0;
                COLORREF c = image.getPixel(x, y, r, g, b);
                brighten(r, g, b);
                newImage->setPixel(x, y, RGB(r, g, b));
            }
        }
        return newImage;
    }

};

}