-/*
+/*
* crt.c:
*
* Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
*
*/
-static char rcsid[] = "$Id$";
+static char rcsid[] = "$Id: crt.c,v 1.18 2008/03/07 12:37:04 james Exp $";
-/*
- * $Log$
+/*
+ * $Log: crt.c,v $
+ * Revision 1.18 2008/03/07 12:37:04 james
+ * *** empty log message ***
+ *
+ * Revision 1.17 2008/03/03 06:04:42 james
+ * *** empty log message ***
+ *
+ * Revision 1.16 2008/03/02 10:37:56 james
+ * *** empty log message ***
+ *
+ * Revision 1.15 2008/02/27 09:42:21 james
+ * *** empty log message ***
+ *
+ * Revision 1.14 2008/02/27 00:27:21 james
+ * *** empty log message ***
+ *
+ * Revision 1.13 2008/02/26 23:56:12 james
+ * *** empty log message ***
+ *
+ * Revision 1.12 2008/02/26 23:23:17 james
+ * *** empty log message ***
+ *
+ * Revision 1.11 2008/02/23 11:48:37 james
+ * *** empty log message ***
+ *
+ * Revision 1.10 2008/02/22 17:07:00 james
+ * *** empty log message ***
+ *
+ * Revision 1.9 2008/02/07 13:22:51 james
+ * *** empty log message ***
+ *
+ * Revision 1.8 2008/02/07 13:19:48 james
+ * *** empty log message ***
+ *
+ * Revision 1.7 2008/02/07 12:41:06 james
+ * *** empty log message ***
+ *
+ * Revision 1.6 2008/02/07 12:16:04 james
+ * *** empty log message ***
+ *
+ * Revision 1.5 2008/02/06 11:30:37 james
+ * *** empty log message ***
+ *
+ * Revision 1.4 2008/02/05 01:11:46 james
+ * *** empty log message ***
+ *
+ * Revision 1.3 2008/02/04 20:23:55 james
+ * *** empty log message ***
+ *
* Revision 1.2 2008/02/04 02:05:06 james
* *** empty log message ***
*
#include "project.h"
+void
+crt_erase (CRT * c, CRT_Pos s, CRT_Pos e, int ea, int color)
+{
+ CRT_CA *ps = &c->screen[CRT_ADDR_POS (&s)];
+ CRT_CA *pe = &c->screen[CRT_ADDR_POS (&e)];
+
+ while (ps <= pe) {
+ ps->chr = ' ';
+ if (ea) {
+ ps->attr = CRT_ATTR_NORMAL;
+ ps->color = color;
+ }
+ ps++;
+ }
+
+}
+
void
crt_cls (CRT * c)
{
+ CRT_Pos s = { 0, 0 };
+ CRT_Pos e = { CRT_COLS - 1, CRT_ROWS - 1 };
int i;
- for (i = 0; i < CRT_CELS; ++i)
- {
- c->screen[i].chr = ' ';
- c->screen[i].chr = CRT_ATTR_NORMAL;
- }
+ crt_erase (c, s, e, 1, CRT_COLOR_NORMAL);
+#if 0
+ c->sh.dir = 0;
+#endif
+}
+
+void
+crt_scroll_up (CRT * c, CRT_Pos s, CRT_Pos e, int ea, int color)
+{
+ int l, n;
+ int p;
+
+
+ s.x = 0;
+ e.x = CRT_COLS - 1;
+
+#if 0
+ c->sh.s = s;
+ c->sh.e = e;
+ c->sh.dir = -1;
+#endif
+
+ l = e.x - s.x;
+ l++;
+ l *= sizeof (CRT_CA);
+
+ n = e.y - s.y;
+
+
+ p = CRT_ADDR_POS (&s);
+
+ while (n--) {
+ memcpy (&c->screen[p], &c->screen[p + CRT_COLS], l);
+ p += CRT_COLS;
+ }
+
+ s.y = e.y;
+ crt_erase (c, s, e, ea, color);
+
+}
+
+void
+crt_scroll_down (CRT * c, CRT_Pos s, CRT_Pos e, int ea, int color)
+{
+ int l, n;
+ int p;
+
+ s.x = 0;
+ e.x = CRT_COLS - 1;
+
+#if 0
+ c->sh.s = s;
+ c->sh.e = e;
+ c->sh.dir = 1;
+#endif
+
+ l = e.x - s.x;
+ l++;
+ l *= sizeof (CRT_CA);
+
+ n = e.y - s.y;
+ // n++;
+
+ p = CRT_ADDR_POS (&e);
+
+ while (n--) {
+ p -= CRT_COLS;
+ memcpy (&c->screen[p], &c->screen[p - CRT_COLS], l);
+ }
+
+ e.y = s.y;
+ crt_erase (c, s, e, ea, color);
+
}
void
c->pos.x = 0;
c->pos.y = 0;
c->hide_cursor = 1;
+ c->size.x = CRT_COLS;
+ c->size.y = CRT_ROWS;
+#if 0
+ c->sh.dir = 0;
+#endif
}
void
c->screen[CRT_ADDR (c->pos.y, c->pos.x)] = ca;
-
-
+#if 0
+ c->sh.dir = 0;
+#endif
}