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| author |   Nicolas Pitre <npitre@baylibre.com> | 2025-05-07 10:13:17 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-21 13:39:45 +0200 |
| commit | 68e7a421ab4f0ca97dcfff638bc5c784bf28eebd (patch) | |
| tree | 08f05097f9065aa1cc603e0aee59a9f5b29cea36 /drivers/tty/vt | |
| parent | vt: ucs.c: fix misappropriate in_range() usage (diff) | |
| download | wireguard-linux-68e7a421ab4f0ca97dcfff638bc5c784bf28eebd.tar.xz wireguard-linux-68e7a421ab4f0ca97dcfff638bc5c784bf28eebd.zip | |
vt: make sure displayed double-width characters are remembered as such
And to do so we ensure the Unicode screen buffer is initialized when
double-width characters are encountered.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Link: https://lore.kernel.org/r/20250507141535.40655-3-nico@fluxnic.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt')
| -rw-r--r-- | drivers/tty/vt/vt.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 24c6cd2eed78..58fa1b285f22 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2930,8 +2930,15 @@ static int vc_process_ucs(struct vc_data *vc, int *c, int *tc) { u32 prev_c, curr_c = *c; - if (ucs_is_double_width(curr_c)) + if (ucs_is_double_width(curr_c)) { + /* + * The Unicode screen memory is allocated only when + * required. This is one such case as we need to remember + * which displayed characters are double-width. + */ + vc_uniscr_check(vc); return 2; + } if (!ucs_is_zero_width(curr_c)) return 1; |