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| author | Jan Engelhardt <jengelh@computergmbh.de> | 2008-04-29 09:59:46 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 17:06:06 +0200 |
| commit | c9e587abfdec2c2aaa55fab83bcb4972e2f84f9b (patch) | |
| tree | 86ab335b702608c90e9ce3dd759c1c96247a60d5 /drivers/char/vt.c | |
| parent | directly use kmalloc() and kfree() in init/initramfs.c (diff) | |
| download | linux-c9e587abfdec2c2aaa55fab83bcb4972e2f84f9b.tar.xz linux-c9e587abfdec2c2aaa55fab83bcb4972e2f84f9b.zip | |
vt: fix background color on line feed
A command that causes a line feed while a background color is active,
such as
perl -e 'print "x" x 60, "\e[44m", "x" x 40, "\e[0m\n"'
and
perl -e 'print "x" x 40, "\e[44m\n", "x" x 40, "\e[0m\n"'
causes the line that was started as a result of the line feed to be completely
filled with the currently active background color instead of the default
color.
When scrolling, part of the current screen is memcpy'd/memmove'd to the new
region, and the new line(s) that will appear as a result are cleared using
memset. However, the lines are cleared with vc->vc_video_erase_char, causing
them to be colored with the currently active background color. This is
different from X11 terminal emulators which always paint the new lines with
the default background color (e.g. `xterm -bg black`).
The clear operation (\e[1J and \e[2J) also use vc_video_erase_char, so a new
vc->vc_scrl_erase_char is introduced with contains the erase character used
for scrolling, which is built from vc->vc_def_color instead of vc->vc_color.
Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/vt.c')
| -rw-r--r-- | drivers/char/vt.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c index df4c3ead9e2b..1c2660477135 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -301,7 +301,7 @@ static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); - scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, + scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_scrl_erase_char, vc->vc_size_row * nr); } @@ -319,7 +319,7 @@ static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); step = vc->vc_cols * nr; scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); - scr_memsetw(s, vc->vc_video_erase_char, 2 * step); + scr_memsetw(s, vc->vc_scrl_erase_char, 2 * step); } static void do_update_region(struct vc_data *vc, unsigned long start, int count) @@ -400,7 +400,7 @@ static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, * Bit 7 : blink */ { - u8 a = vc->vc_color; + u8 a = _color; if (!vc->vc_can_do_color) return _intensity | (_italic ? 2 : 0) | @@ -434,6 +434,7 @@ static void update_attr(struct vc_data *vc) vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; + vc->vc_scrl_erase_char = (build_attr(vc, vc->vc_def_color, 1, false, false, false, false) << 8) | ' '; } /* Note: inverting the screen twice should revert to the original state */ |