vt: add tiny hooks for colour support

diff --git a/Kernel/include/vt.h b/Kernel/include/vt.h
index 9509a73..5295874 100644 (file)
--- a/Kernel/include/vt.h
+++ b/Kernel/include/vt.h
@@ -51,5 +51,7 @@ void do_beep(void);
 int vt_ioctl(uint8_t minor, uarg_t op, char *ptr);
 int vt_inproc(uint8_t minor, unsigned char c);
 extern uint8_t vtattr_cap;
+extern uint8_t vtink;
+extern uint8_t vtpaper;
 
 #endif

diff --git a/Kernel/vt.c b/Kernel/vt.c
index 041793d..93375f6 100644 (file)
--- a/Kernel/vt.c
+++ b/Kernel/vt.c
@@ -40,23 +40,43 @@
  *     very sure you inspect the asm output for calls to compiler helpers
  *     and don't add any.
  *
+ *     Extensions in use
+ *     - Esc a c       Set vtattr bits (inverse, etc)
+ *
+ *     - Esc b c       Set ink colour
+ *     - Esc c c       Set paper colour
+ *     Where c uses the low 4bits to provide IBRG colours
+ *             0 black
+ *             1 blue
+ *             2 red
+ *             3 magenta or similar
+ *             4 green
+ *             5 cyan
+ *             6 yellow
+ *             7 white
+ *             8-15 brighter versions - if available
+ *     Bit 4 is reserved (must be 0 if bit 5 is 0)
+ *     Bit 5 indicates bit 4-0 are platform specific colour
+ *     Bit 6 should be set to keep it in the ascii range
+ *     Bit 7 should be clear
+ *
  *     Possible VT extensions to look at
  *     - Esc-L         Insert blank line, move lines below down
  *     - ESC-M         Delete cursor line, move up blank bottom
- *     -               Colour setting (Atari ST uses esc b/c) but we need
- *                     more flexibility and border
  *     - ESC-d         erase start to cursor inclusive
  *     - ESC-j         save cursor y/x
  *     - ESC-k         restore cursor
  *     - ESC-l         erase line, cursor to left
  *     - ESC-o         erase from start of line to cursor (inclusive)
  *
- *     Would tty be a better graphics interface than direct ? Probably not ?
+ *     - Some way to set border colour on consoles.
  */
 
 
 static uint8_t vtmode;
 uint8_t vtattr;
+uint8_t vtink;
+uint8_t vtpaper;
 static signed char cursorx;
 static signed char cursory = VT_INITIAL_LINE;
 static signed char ncursory;
@@ -170,6 +190,10 @@ static int escout(unsigned char c)
                return 2;
        if (c == 'a')
                return 4;
+       if (c == 'b')
+               return 5;
+       if (c == 'c')
+               return 6;
        return 0;
 }
 
@@ -219,10 +243,18 @@ void vtoutput(unsigned char *p, unsigned int len)
                                if (ncursorx >= 0 && ncursorx <= VT_RIGHT)
                                        cursorx = ncursorx;
                                        vtmode = 0;
-                       } else {
+                       } else if (vtmode == 4 {
                                vtattr = c;
                                vtmode = 0;
                                continue;
+                       } else if (vtmode == 5) {
+                               vtink = c;
+                               vtmode = 0;
+                               continue;
+                       } else if (vtmode == 6) {
+                               vtpaper = c;
+                               vtmode = 0;
+                               continue;
                        }
                }
                /* Copy the pending symbol and clear the buffer */