screen.h

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//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