include/touch/touch.h

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#ifndef TOUCH_TOUCH_H
#define TOUCH_TOUCH_H

#include <stdint.h>



struct touch_point {
        int16_t panel_x; 
        int16_t panel_y; 
        uint16_t raw_x;  
        uint16_t raw_y;  
};

#define TOUCH_NR_CALIBRATION_POINTS  3

typedef struct touch_point
                touch_calibration_points_t[TOUCH_NR_CALIBRATION_POINTS];

struct touch_calibration_matrix {
        int32_t a;    
        int32_t b;    
        int32_t c;    
        int32_t d;    
        int32_t e;    
        int32_t f;    
        int32_t k;    
};


enum touch_event_types {
        TOUCH_NO_EVENT,
        TOUCH_PRESS,
        TOUCH_MOVE,
        TOUCH_RELEASE,
};


struct touch_event {
        enum touch_event_types type;    
        struct touch_point point;       
};


typedef void (* touch_event_handler_t)(const struct touch_event *event);


void touch_init(void);
void touch_enable(void);
void touch_disable(void);
void touch_get_event(struct touch_event *buffer);
bool touch_is_touched(void);
void touch_set_calibration_matrix(
                const struct touch_calibration_matrix *matrix);
void touch_get_calibration_matrix(struct touch_calibration_matrix *buffer);
void touch_compute_calibration_matrix(
                const touch_calibration_points_t points,
                struct touch_calibration_matrix *matrix);
void touch_set_event_handler(touch_event_handler_t handler);
touch_event_handler_t touch_get_event_handler(void);


#endif /* TOUCH_TOUCH_H */

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