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+/* mftalk.h -- METAFONT server/client protocol (not as complex as
+ it sounds).
+
+ Copyright (C) 1994 Ralph Schleicher */
+
+/* This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this library; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef MFTALK_H
+#define MFTALK_H
+
+/* This is the server to client protocol:
+
+ 'r' [0|1] <left> <bottom> <right> <top> Fill rectangle.
+ 'l' [0|1] <col> <row> <num> <col> ... Draw a line.
+ 'f' Update screen.
+ ^D End of transmission.
+
+ And there is one client to server command:
+
+ ^F Acknowledgment. */
+
+#define MF_RECT ((int) 'r')
+#define MF_LINE ((int) 'l')
+#define MF_FLUSH ((int) 'f')
+#define MF_EXIT ((int) ('D' - 64))
+#define MF_ACK ((int) ('F' - 64))
+
+#define MF_WHITE 0
+#define MF_BLACK 1
+
+#endif /* !MFTALK_H */