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#ifndef __SCREENBUFFER_H__
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#ifndef __SCREENBUFFER_H__
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#define __SCREENBUFFER_H__
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#define __SCREENBUFFER_H__
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#include <stdint.h>
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#include <stdint.h>
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#include <sys/types.h>
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#define DEFAULT_FOREGROUND 0x0  /**< default console foreground color */
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#define DEFAULT_FOREGROUND 0x0  /**< default console foreground color */
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#define DEFAULT_BACKGROUND 0xf0f0f0 /**< default console background color */
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#define DEFAULT_BACKGROUND 0xf0f0f0 /**< default console background color */
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typedef struct {
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typedef struct {
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    } a;
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    } a;
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} attrs_t;
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} attrs_t;
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/** One field on screen. It contain one character and its attributes. */
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/** One field on screen. It contain one character and its attributes. */
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typedef struct {
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typedef struct {
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    char character;         /**< Character itself */
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    wchar_t character;      /**< Character itself */
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    attrs_t attrs;          /**< Character`s attributes */
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    attrs_t attrs;          /**< Character`s attributes */
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} keyfield_t;
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} keyfield_t;
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/** Structure for buffering state of one virtual console.
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/** Structure for buffering state of one virtual console.
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 */
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 */
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 * @param scr   screenbuffer
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 * @param scr   screenbuffer
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 * @param x position on screen
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 * @param x position on screen
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 * @param y position on screen
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 * @param y position on screen
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 * @return  keyfield structure with character and its attributes on x,y
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 * @return  keyfield structure with character and its attributes on x,y
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 */
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 */
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static inline keyfield_t *get_field_at(screenbuffer_t *scr, unsigned int x, unsigned int y)
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static inline keyfield_t *get_field_at(screenbuffer_t *scr, unsigned int x, unsigned int y)
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{
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{
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    return scr->buffer + x + ((y + scr->top_line) % scr->size_y) * scr->size_x;
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    return scr->buffer + x + ((y + scr->top_line) % scr->size_y) * scr->size_x;
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}
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}
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/** Compares two sets of attributes.
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/** Compares two sets of attributes.
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        a1.a.r.bg_color == a2.a.r.bg_color;
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        a1.a.r.bg_color == a2.a.r.bg_color;
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    }
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    }
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}
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}
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void screenbuffer_putchar(screenbuffer_t *scr, char c);
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void screenbuffer_putchar(screenbuffer_t *scr, wchar_t c);
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screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y);
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screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y);
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void screenbuffer_clear(screenbuffer_t *scr);
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void screenbuffer_clear(screenbuffer_t *scr);
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void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line);
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void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line);
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void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest);
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void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest);