LuminanceSource();
virtual ~LuminanceSource();
- virtual int getWidth() = 0;
- virtual int getHeight() = 0;
+ virtual int getWidth() const = 0;
+ virtual int getHeight() const = 0;
- virtual unsigned char getPixel(int x, int y) = 0;
+ virtual unsigned char getPixel(int x, int y) const = 0;
virtual unsigned char* copyMatrix();
};