4 * Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
9 static char rcsid[] = "$Id$";
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51 crt_erase (CRT * c, CRT_Pos s, CRT_Pos e, int ea, int color)
53 CRT_CA *ps = &c->screen[CRT_ADDR_POS (&s)];
54 CRT_CA *pe = &c->screen[CRT_ADDR_POS (&e)];
61 ps->attr = CRT_ATTR_NORMAL;
73 CRT_Pos e = { CRT_COLS - 1, CRT_ROWS - 1 };
76 crt_erase (c, s, e, 1, CRT_COLOR_NORMAL);
81 crt_scroll_up (CRT * c, CRT_Pos s, CRT_Pos e, int ea, int color)
101 p = CRT_ADDR_POS (&s);
105 memcpy (&c->screen[p], &c->screen[p + CRT_COLS], l);
110 crt_erase (c, s, e, ea, color);
115 crt_scroll_down (CRT * c, CRT_Pos s, CRT_Pos e, int ea, int color)
129 l *= sizeof (CRT_CA);
134 p = CRT_ADDR_POS (&e);
138 memcpy (&c->screen[p], &c->screen[p - CRT_COLS], l);
143 crt_erase (c, s, e, ea, color);
159 crt_insert (CRT * c, CRT_CA ca)
163 if (c->pos.x >= CRT_COLS)
164 c->pos.x = CRT_COLS - 1;
167 if (c->pos.y >= CRT_ROWS)
168 c->pos.y = CRT_ROWS - 1;
170 c->screen[CRT_ADDR (c->pos.y, c->pos.x)] = ca;