// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
#ifndef RPI_CANVAS_H
#define RPI_CANVAS_H
#include <stdint.h>

namespace rgb_matrix {
// An interface for things a Canvas can do. The RGBMatrix implements this
// interface, so you can use it directly wherever a canvas is needed.
// However, this abstraction allows you to e.g. create delegating
// implementations that do a particular transformation, e.g. compose images,
// scale, rotate, anti-alias or translate coordinates in a funky way.
// So it might be a good idea to have your demos write to a Canvas instead.
class Canvas {
public:
  virtual ~Canvas() {}
  virtual int width() const = 0;
  virtual int height() const = 0;
  virtual void SetPixel(int x, int y,
                        uint8_t red, uint8_t green, uint8_t blue) = 0;
  virtual void Clear() = 0;
  virtual void Fill(uint8_t red, uint8_t green, uint8_t blue) = 0;
};

}  // namespace rgb_matrix
#endif  // RPI_CANVAS_H