#!/bin/bash
#
# makes the cursor a lefty one
# works on Debian etch with xorg
# needs: pcf2bdf, xfonts-utils and gzip
# execute as root
#
# by markus schnalke -- http://marmaro.de
#

cd /usr/share/fonts/X11/misc

# create backup
cp cursor.pcf.gz cursor.pcf.gz__`date +%F_%H-%M-%S`

# copy to /tmp
cp cursor.pcf.gz /tmp
cd /tmp

# extract cursor
gunzip --stdout cursor.pcf.gz > cursor.pcf
pcf2bdf cursor.pcf > cursor.bdf

# patch
# exchanges the code of left_ptr and right_ptr and their masks
# the size in line 3 had to be positive, so I adjusted
echo "--- cursor.bdf	2007-10-07 00:22:44.000000000 +0200
+++ cursor_lefty.bdf	2007-10-07 00:19:05.000000000 +0200
@@ -1,6 +1,6 @@
 STARTFONT 2.1
 FONT cursor
-SIZE -1 78 78
+SIZE 1 78 78
 FONTBOUNDINGBOX 31 31 -15 -16
 
 STARTPROPERTIES 10
@@ -1548,46 +1548,46 @@
 ENCODING 68
 SWIDTH 548 0
 DWIDTH 17 0
-BBX 8 14 0 -14
+BBX 8 14 -7 -14
 BITMAP
-80
-C0
-E0
-F0
-F8
-FC
-FE
+01
+03
+07
+0F
+1F
+3F
+7F
 FF
-F8
-D8
-8C
-0C
-06
-06
+1F
+1B
+31
+30
+60
+60
 ENDCHAR
 
 STARTCHAR left_ptr_mask
 ENCODING 69
 SWIDTH 548 0
 DWIDTH 17 0
-BBX 10 16 -1 -15
+BBX 10 16 -8 -15
 BITMAP
-C000
-E000
-F000
-F800
-FC00
-FE00
-FF00
-FF80
+00C0
+01C0
+03C0
+07C0
+0FC0
+1FC0
+3FC0
+7FC0
 FFC0
 FFC0
-FE00
-EF00
-CF00
-0780
-0780
-0300
+1FC0
+3DC0
+3CC0
+7800
+7800
+3000
 ENDCHAR
 
 STARTCHAR left_side
@@ -2131,46 +2131,46 @@
 ENCODING 94
 SWIDTH 548 0
 DWIDTH 17 0
-BBX 8 14 -7 -14
+BBX 8 14 0 -14
 BITMAP
-01
-03
-07
-0F
-1F
-3F
-7F
+80
+C0
+E0
+F0
+F8
+FC
+FE
 FF
-1F
-1B
-31
-30
-60
-60
+F8
+D8
+8C
+0C
+06
+06
 ENDCHAR
 
 STARTCHAR right_ptr_mask
 ENCODING 95
 SWIDTH 548 0
 DWIDTH 17 0
-BBX 10 16 -8 -15
+BBX 10 16 -1 -15
 BITMAP
-00C0
-01C0
-03C0
-07C0
-0FC0
-1FC0
-3FC0
-7FC0
+C000
+E000
+F000
+F800
+FC00
+FE00
+FF00
+FF80
 FFC0
 FFC0
-1FC0
-3DC0
-3CC0
-7800
-7800
-3000
+FE00
+EF00
+CF00
+0780
+0780
+0300
 ENDCHAR
 
 STARTCHAR right_side
" | patch -N

# pack
bdftopcf cursor.bdf > cursor_lefty.pcf
gzip --stdout cursor_lefty.pcf > cursor_lefty.pcf.gz

# install
cd -
cp /tmp/cursor_lefty.pcf.gz cursor.pcf.gz