Image.h

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#ifndef IMAGE_H
#define IMAGE_H IMAGE_H

#include "ColorRGBA.h"
#include <cassert>

class Image
{
    int resX;
    int resY;
    
    ColorRGBA *pixel;
    
public:

    Image(int resX,int resY) : resX(resX),resY(resY)
    {
        assert (resX > 0 && resY > 0);
        pixel = new ColorRGBA[resX*resY];
    }

    Image() : resX(0),resY(0)
    {
        pixel = NULL;
    }

    ~Image()
    { 
        if (pixel) delete[] pixel;
    };
    
    ColorRGBA* operator[](int y)
    { 
        assert(pixel != NULL);
        return pixel + y * resX; 
    };

    int getWidth() const { return resX; }

    int getHeight() const { return resY; }

    ColorRGBA& getPixel (int x, int y)
    { 
        if (x < 0 || y < 0) printf("x=%d, y=%d\n", x, y);
        // just for sure
        assert(pixel != NULL && x >=0 && y >= 0);
        assert(x < resX && y < resY);

        // return pixel
        return pixel[y * resX + x]; 
    };

    void setPixel (const ColorRGBA& p, int x, int y)
    { 
        // just for sure
        assert(pixel != NULL && x >=0 && y >= 0);
        assert(x < resX && y < resY);

        // return pixel
        pixel[y * resX + x] = p; 
    };
    
    bool ReadPNG(const char* fileName);
    
    inline bool LoadImage(const char* fileName) { return ReadPNG(fileName); };

    void WritePNG(const char* fileName);

   };

#endif

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