[Linux-fbdev-devel] Make "software" cursor xterm-like (REPOST)

[Christian L. <chr...@fr...>]

[REPOST because of missing patches]

I would like to submit the following patches to linux-2.5.7-dj1 so that:

* The "software" cursor (activate using "echo -e '\033[?17c') works like in
   "xterm":
   it merely inverses the current (color) attributes of the current underlying
   character instead of having a fixed color
   This changes affects hardware text mode and graphics framebuffers

* Blank char attributes are set equal to current char attributes
   (so that the new software cursor displays properly)

* Text blinking attribute is disabled while in hardware EGA/VGA color textmode
   so that all 16 background colors are available
   --> echo -e '\033[5m' activates "bright background"

Examples:

$ echo -e '\033[17c'
$ echo -e '\033[32;44;1m'

The text is bright green over blue
The cursor is blue over bright green

$ echo -e '\033[m\033[30;43;5m'

The text is black over yellow
The cursor is yellow over black


I would suggest that similar changes are made for the framebuffer's "hardware"
cursor so that it has "xterm -bc"-like behavior.

--- ../linux-2.5.7-orig/drivers/char/vt.c       Wed Mar 27 18:04:35 2002
+++ drivers/char/vt.c	Wed Mar 27 10:38:40 2002
@@ -199,6 +199,8 @@
  	softcursor_original = i;
          i |= ((type >> 8) & 0xff00 );
          i ^= ((type) & 0xff00 );
+	if (i == softcursor_original)
+		i = (i & 0xffff00ff) | ((i & 0x0f00) << 4) | ((i & 0xf000) >> 4);
          if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 
0x7000)))
  		i ^= 0x7000;
          if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 
0x0700;
@@ -454,7 +456,7 @@
  void update_attr(struct vc_data *vc)
  {
  	attr = build_attr(vc, color, intensity, blink, underline, reverse ^ 
decscnm);
-	video_erase_char = (build_attr(vc, color, intensity, 0, 0, decscnm) << 8) 
| ' ';
+	video_erase_char = (build_attr(vc, color, intensity, blink, 0, decscnm) 
<< 8) | ' ';
  }

  /*
--- ../linux-2.5.7-orig/drivers/video/vgacon.c	Wed Mar 27 18:04:49 2002
+++ drivers/video/vgacon.c	Mon Mar 25 17:45:37 2002
@@ -267,6 +267,11 @@
  					outb_p (default_blu[i], 0x3c9) ;
  				}
  			}
+
+			/* Enable bold background instead of blinking */
+			inb_p (0x3da) ;
+			outb_p (0x30, 0x3c0) ;
+			outb_p (0x30, 0x3c0) ;
  		}
  		else
  		{