4 * Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
9 static char rcsid[] = "$Id$";
13 * Revision 1.7 2008/02/07 12:41:06 james
14 * *** empty log message ***
16 * Revision 1.6 2008/02/07 12:16:04 james
17 * *** empty log message ***
19 * Revision 1.5 2008/02/06 11:30:37 james
20 * *** empty log message ***
22 * Revision 1.4 2008/02/05 01:11:46 james
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25 * Revision 1.3 2008/02/04 20:23:55 james
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28 * Revision 1.2 2008/02/04 02:05:06 james
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31 * Revision 1.1 2008/02/03 23:31:25 james
32 * *** empty log message ***
39 crt_erase (CRT * c, CRT_Pos s, CRT_Pos e, int ea)
41 CRT_CA *ps = &c->screen[CRT_ADDR_POS (&s)];
42 CRT_CA *pe = &c->screen[CRT_ADDR_POS (&e)];
48 ps->attr = CRT_ATTR_NORMAL;
49 ps->color = CRT_COLOR_NORMAL;
60 CRT_Pos e = { CRT_COLS - 1, CRT_ROWS - 1 };
63 crt_erase (c, s, e, 1);
68 crt_scroll_up (CRT * c, CRT_Pos s, CRT_Pos e, int ea)
87 p = CRT_ADDR_POS (&s);
91 memcpy (&c->screen[p], &c->screen[p + CRT_COLS], l);
96 crt_erase (c, s, e, ea);
101 crt_scroll_down (CRT * c, CRT_Pos s, CRT_Pos e, int ea)
116 l *= sizeof (CRT_CA);
121 p = CRT_ADDR_POS (&e);
125 memcpy (&c->screen[p], &c->screen[p - CRT_COLS], l);
130 crt_erase (c, s, e, ea);
146 crt_insert (CRT * c, CRT_CA ca)
150 if (c->pos.x >= CRT_COLS)
151 c->pos.x = CRT_COLS - 1;
154 if (c->pos.y >= CRT_ROWS)
155 c->pos.y = CRT_ROWS - 1;
157 c->screen[CRT_ADDR (c->pos.y, c->pos.x)] = ca;