#ifndef CARD_OS_USER
#define CARD_OS_USER

#include <stdint.h>

typedef enum
{
  OS_CMD_SBRK,
  OS_CMD_DRAW_RECT,
  OS_CMD_GET_BUTTON
} os_command;

typedef struct
{
  os_command command;
  void* data;
} os_message;

typedef void (*os_call_fn)(os_message*);

typedef struct
{
  uint8_t r, g, b;
  uint16_t x, y, w, h;
} card_os_rect;

typedef enum
{
  OS_BUTTON_LEFT,
  OS_BUTTON_MIDDLE,
  OS_BUTTON_RIGHT
} card_os_button;

void card_os_put_rect(card_os_rect rect);
int card_os_get_button(card_os_button button);

#endif // CARD_OS_USER