Rewrite video emulation. Features:

- slightly more accurate VGA hardware emulation;
- more int 10 functions, especially wrt to palette handling;
- first shot at graphics support;
- mode switching.

Bugs:

- graphics too slow;
- only 16 color modes work for now;
- works only under X, and only with 16 bit TrueColor visuals;
- far from being genuinely useful (I can play an old EGA game now, though
  (mahjongg.exe)).

Also, the code has been cleaned up a bit (more to come in a separate commit).

1 files changed, 68 insertions, 0 deletions

diff --git a/usr.bin/doscmd/tty.h b/usr.bin/doscmd/tty.h
new file mode 100644
index 0000000..2c4b4c1
--- /dev/null
+++ b/usr.bin/doscmd/tty.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2001 The FreeBSD Project, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY The FreeBSD Project, Inc. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL The FreeBSD Project, Inc. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/* TTY subsystem   XXX rewrite! */
+int redirect0;
+int redirect1; 
+int redirect2;
+extern int kbd_fd;
+extern char *xfont;
+
+u_short	KbdRead(void);
+u_short	KbdPeek(void);
+void	KbdWrite(u_short);
+
+void	Failure();
+void	get_lines(void);
+void	get_ximage(void);
+void	init_window(void);
+void	init_ximage(int, int);
+void	load_font(void);
+void	resize_window(void);
+int	tty_eread(REGISTERS, int, int);
+int	tty_estate(void);
+void	tty_write(int, int);
+void	tty_rwrite(int, int, int);
+void	tty_move(int, int);
+int	tty_read(regcontext_t *, int);
+void	tty_report(int *, int *);
+void	tty_flush();
+void	tty_index();
+void	tty_pause();
+int	tty_peek(REGISTERS, int);
+int	tty_state();
+void	tty_scroll(int, int, int, int, int, int);
+void	tty_rscroll(int, int, int, int, int, int);
+int	tty_char(int, int);
+void	video_blink(int);
+void	video_setborder(int);
+void	video_update(regcontext_t *);
+void	console_init(void);
+void	kbd_init(void);
+void	kbd_bios_init(void);
+void	update_pixels(void);