diff options
| author | Simon Glass | 2016-01-14 18:10:41 -0700 |
|---|---|---|
| committer | Anatolij Gustschin | 2016-01-30 10:55:37 +0100 |
| commit | 7b9f7e445e13de4f3169d9e5ba5e3b28c4d79ce4 (patch) | |
| tree | b79a245825071d87f981fcb9e749848c3c9585cf /include/video_console.h | |
| parent | 58c733a70ff1967490af1fd69aab2ba7bb86eb2c (diff) | |
video: Provide a backspace method
With proportional fonts the vidconsole uclass cannot itself erase the
previous character. Provide an optional method so that the driver can
handle this operation.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/video_console.h')
| -rw-r--r-- | include/video_console.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/video_console.h b/include/video_console.h index 36c4e138122..26047934da8 100644 --- a/include/video_console.h +++ b/include/video_console.h @@ -101,6 +101,20 @@ struct vidconsole_ops { * positions. */ int (*entry_start)(struct udevice *dev); + + /** + * backspace() - Handle erasing the last character + * + * With proportional fonts the vidconsole uclass cannot itself erase + * the previous character. This optional method will be called when + * a backspace is needed. The driver should erase the previous + * character and update the cursor position (xcur_frac, ycur) to the + * start of the previous character. + * + * If not implement, default behaviour will work for fixed-width + * characters. + */ + int (*backspace)(struct udevice *dev); }; /* Get a pointer to the driver operations for a video console device */ |