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| author | Ingo Brueckl <ib@wupperonline.de> | 2008-12-10 23:35:00 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-12-18 09:13:38 -0800 |
| commit | 41085614ef74686f194520c76b5941b6941c882f (patch) | |
| tree | 16996f25c1193a0f1669577b0fb0db332927c514 /drivers | |
| parent | e0489938ae272d46a27dfa3ce235a169f2d1a524 (diff) | |
| download | linux-stable-41085614ef74686f194520c76b5941b6941c882f.tar.gz linux-stable-41085614ef74686f194520c76b5941b6941c882f.tar.bz2 linux-stable-41085614ef74686f194520c76b5941b6941c882f.zip | |
console ASCII glyph 1:1 mapping
commit 1c55f18717304100a5f624c923f7cb6511b4116d upstream.
For the console, there is a 1:1 mapping of glyphs which cannot be found
in the current font. This seems to be meant as a kind of 'emergency
fallback' for fonts without unicode mapping which otherwise would
display nothing readable on the screen.
At the moment it affects all chars for which no substitution character
is defined. In particular this means that for all chars (>= 128) where
there is no iso88591-1/unicode character (e.g. control character area)
you'll get the very strange 1:1 mapping of the (cp437) graphics card
glyphs.
I'm pretty sure that the 1:1 mapping should only affect strict ASCII
code characters, i.e. chars < 128.
The patch limits the mapping as it probably was meant anyway.
Signed-off-by: Ingo Brueckl <ib@wupperonline.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Egmont Koblinger <egmont@uhulinux.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/vt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c index 60359c360912..d429499ac1bf 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -2287,7 +2287,7 @@ rescan_last_byte: continue; /* nothing to display */ } /* Glyph not found */ - if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { + if ((!(vc->vc_utf && !vc->vc_disp_ctrl) && c < 128) && !(c & ~charmask)) { /* In legacy mode use the glyph we get by a 1:1 mapping. This would make absolutely no sense with Unicode in mind, but do this for ASCII characters since a font may lack |