struct display_glyph_area* src);
int redisplay_normalize_glyph_area (struct display_box* dest,
struct display_glyph_area* glyphsrc);
void redisplay_clear_to_window_end (struct window *w, int ypos1, int ypos2);
void redisplay_clear_region (Lisp_Object window, face_index findex, int x,
int y, int width, int height);
struct display_glyph_area* src);
int redisplay_normalize_glyph_area (struct display_box* dest,
struct display_glyph_area* glyphsrc);
void redisplay_clear_to_window_end (struct window *w, int ypos1, int ypos2);
void redisplay_clear_region (Lisp_Object window, face_index findex, int x,
int y, int width, int height);