diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/VGA-softcursor.txt |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'Documentation/VGA-softcursor.txt')
-rw-r--r-- | Documentation/VGA-softcursor.txt | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/Documentation/VGA-softcursor.txt b/Documentation/VGA-softcursor.txt new file mode 100644 index 000000000000..70acfbf399eb --- /dev/null +++ b/Documentation/VGA-softcursor.txt | |||
@@ -0,0 +1,39 @@ | |||
1 | Software cursor for VGA by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz> | ||
2 | ======================= and Martin Mares <mj@atrey.karlin.mff.cuni.cz> | ||
3 | |||
4 | Linux now has some ability to manipulate cursor appearance. Normally, you | ||
5 | can set the size of hardware cursor (and also work around some ugly bugs in | ||
6 | those miserable Trident cards--see #define TRIDENT_GLITCH in drivers/video/ | ||
7 | vgacon.c). You can now play a few new tricks: you can make your cursor look | ||
8 | like a non-blinking red block, make it inverse background of the character it's | ||
9 | over or to highlight that character and still choose whether the original | ||
10 | hardware cursor should remain visible or not. There may be other things I have | ||
11 | never thought of. | ||
12 | |||
13 | The cursor appearance is controlled by a "<ESC>[?1;2;3c" escape sequence | ||
14 | where 1, 2 and 3 are parameters described below. If you omit any of them, | ||
15 | they will default to zeroes. | ||
16 | |||
17 | Parameter 1 specifies cursor size (0=default, 1=invisible, 2=underline, ..., | ||
18 | 8=full block) + 16 if you want the software cursor to be applied + 32 if you | ||
19 | want to always change the background color + 64 if you dislike having the | ||
20 | background the same as the foreground. Highlights are ignored for the last two | ||
21 | flags. | ||
22 | |||
23 | The second parameter selects character attribute bits you want to change | ||
24 | (by simply XORing them with the value of this parameter). On standard VGA, | ||
25 | the high four bits specify background and the low four the foreground. In both | ||
26 | groups, low three bits set color (as in normal color codes used by the console) | ||
27 | and the most significant one turns on highlight (or sometimes blinking--it | ||
28 | depends on the configuration of your VGA). | ||
29 | |||
30 | The third parameter consists of character attribute bits you want to set. | ||
31 | Bit setting takes place before bit toggling, so you can simply clear a bit by | ||
32 | including it in both the set mask and the toggle mask. | ||
33 | |||
34 | Examples: | ||
35 | ========= | ||
36 | |||
37 | To get normal blinking underline, use: echo -e '\033[?2c' | ||
38 | To get blinking block, use: echo -e '\033[?6c' | ||
39 | To get red non-blinking block, use: echo -e '\033[?17;0;64c' | ||