From c9e587abfdec2c2aaa55fab83bcb4972e2f84f9b Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Tue, 29 Apr 2008 00:59:46 -0700 Subject: 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 Cc: "Antonino A. Daplas" Cc: "H. Peter Anvin" Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/console/vgacon.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/video/console/vgacon.c') diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 6df29a6..bd1f57b 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -1350,7 +1350,7 @@ static int vgacon_scroll(struct vc_data *c, int t, int b, int dir, } else c->vc_origin += delta; scr_memsetw((u16 *) (c->vc_origin + c->vc_screenbuf_size - - delta), c->vc_video_erase_char, + delta), c->vc_scrl_erase_char, delta); } else { if (oldo - delta < vga_vram_base) { @@ -1363,7 +1363,7 @@ static int vgacon_scroll(struct vc_data *c, int t, int b, int dir, } else c->vc_origin -= delta; c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; - scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char, + scr_memsetw((u16 *) (c->vc_origin), c->vc_scrl_erase_char, delta); } c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; -- cgit v1.1