hackaton2019

//screen.h
#ifndef _SCREEN_H
#define _SCREEN_H

#include <inttypes.h>
#include "window.h"

typedef struct _screen_t screen_t;

typedef void (screen_init_t)(screen_t* screen);
typedef void (screen_done_t)(screen_t* screen);
typedef void (screen_draw_t)(screen_t* screen);
typedef int (screen_event_t)(screen_t* screen, window_t* window, uint8_t event, void* param);


#pragma pack(push)
#pragma pack(1)

typedef struct _screen_t
{
	int16_t id;              // (2 bytes) screen identifier (2bytes)
	uint32_t flg;            // (4 bytes) flags
	screen_init_t* init;     // (4 bytes) init callback
	screen_done_t* done;     // (4 bytes) done callback
	screen_draw_t* draw;     // (4 bytes) draw callback
	screen_event_t* event;   // (4 bytes) event callback
	uint16_t data_size;      // (2 bytes) dynamic data size
	void* pdata;             // (4 bytes) data pointer - automaticaly allocated before init
} screen_t;                  // (28 bytes total)

#pragma pack(pop)



#ifdef __cplusplus
extern "C" {
#endif //__cplusplus


extern int16_t screen_id(void);

extern int16_t screen_register(screen_t* pscreen);

extern screen_t* screen_unregister(int16_t screen_id);

extern void screen_stack_push(int16_t screen_id);

extern int16_t screen_stack_pop(void);

extern void screen_open(int16_t screen_id);

extern void screen_close(void);

extern void screen_draw(void);

extern void screen_dispatch_event(window_t* window, uint8_t event, void* param);

extern screen_t* screen_get_curr(void);

#ifdef __cplusplus
}
#endif //__cplusplus



#endif // _SCREEN_H