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| author |   Nicolas Pitre <nicolas.pitre@linaro.org> | 2018-06-26 23:56:41 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-28 21:38:12 +0900 |
| commit | d21b0be246bf3bbf569e6e239f56abb529c7154e (patch) | |
| tree | d3d40eba5bb90d02875e55f49e624e9d3b7a82f9 /include/linux/selection.h | |
| parent | vt: preserve unicode values corresponding to screen characters (diff) | |
| download | wireguard-linux-d21b0be246bf3bbf569e6e239f56abb529c7154e.tar.xz wireguard-linux-d21b0be246bf3bbf569e6e239f56abb529c7154e.zip | |
vt: introduce unicode mode for /dev/vcs
Now that the core vt code knows how to preserve unicode values for each
displayed character, it is then possible to let user space access it via
/dev/vcs*.
Unicode characters are presented as 32 bit values in native endianity
via the /dev/vcsu* devices, mimicking the simple /dev/vcs* devices.
Unicode with attributes (similarly to /dev/vcsa*) is not supported at
the moment.
Data is available only as long as the console is in UTF-8 mode. ENODATA
is returned otherwise.
This was tested with the latest development version (to become
version 5.7) of BRLTTY. Amongst other things, this allows ⠋⠕⠗ ⠞⠓⠊⠎
⠃⠗⠁⠊⠇⠇⠑⠀⠞⠑⠭⠞⠀to appear directly on braille displays regardless of the
console font being used.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Dave Mielke <Dave@mielke.cc>
Acked-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/selection.h')
| -rw-r--r-- | include/linux/selection.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/selection.h b/include/linux/selection.h index 5b278ce99d8d..2b34df9f1e26 100644 --- a/include/linux/selection.h +++ b/include/linux/selection.h @@ -42,4 +42,9 @@ extern u16 vcs_scr_readw(struct vc_data *vc, const u16 *org); extern void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org); extern void vcs_scr_updated(struct vc_data *vc); +extern int vc_uniscr_check(struct vc_data *vc); +extern void vc_uniscr_copy_line(struct vc_data *vc, void *dest, + unsigned int row, unsigned int col, + unsigned int nr); + #endif |