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56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
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#ifndef EL__TERMINAL_SCREEN_H
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#define EL__TERMINAL_SCREEN_H
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struct screen_char;
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struct terminal;
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/* The terminal's screen manages */
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struct terminal_screen {
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/* This is the screen's image, character by character. */
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struct screen_char *image;
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/* The previous screen's image, used for optimizing actual drawing. */
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struct screen_char *last_image;
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/* The current and the previous cursor positions. */
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int cx, cy;
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int lcx, lcy;
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/* The range of line numbers that are out of sync with the physical
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* screen. @dirty_from > @dirty_to means not dirty. */
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int dirty_from, dirty_to;
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};
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/* Mark the screen ready for redrawing. */
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static inline void
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set_screen_dirty(struct terminal_screen *screen, int from, int to)
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{
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int_upper_bound(&screen->dirty_from, from);
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int_lower_bound(&screen->dirty_to, to);
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}
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/* Initializes a screen. Returns NULL upon allocation failure. */
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struct terminal_screen *init_screen(void);
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/* Cleans up after the screen. */
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void done_screen(struct terminal_screen *screen);
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/* Update the size of the previous and the current screen image to hold @x time
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* @y chars. */
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void resize_screen(struct terminal *term, int x, int y);
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/* Updates the terminal screen. */
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void redraw_screen(struct terminal *term);
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/* Erases the entire screen and moves the cursor to the upper left corner. */
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void erase_screen(struct terminal *term);
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/* Meeep! */
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void beep_terminal(struct terminal *term);
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/* Release private screen drawing utilities. */
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void done_screen_drivers(void);
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#endif
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