Hi Andre,
On Sun, 9 Jan 2022 at 17:57, Andre Przywara andre.przywara@arm.com wrote:
The bitmap fonts (VGA 8x16 and friends) we import from Linux use the 437 code page to map their glyphs. For U-Boot's own purposes this is probably fine, but UEFI applications output Unicode, which only matches in the very basic first 127 characters.
Add a function that converts UTF-8 character sequences into the respective CP437 code point, as far as the characters defined in there allow this. This includes quite some international and box drawing characters, which are used by UEFI applications.
Signed-off-by: Andre Przywara andre.przywara@arm.com
drivers/video/Makefile | 1 + drivers/video/utf8_cp437.c | 169 ++++++++++++++++++++++++++++++ drivers/video/vidconsole-uclass.c | 6 +- include/video_console.h | 9 ++ 4 files changed, 184 insertions(+), 1 deletion(-) create mode 100644 drivers/video/utf8_cp437.c
[..]
This code should only be enabled if UEFI is being used, to reduce code size.
diff --git a/include/video_console.h b/include/video_console.h index a908f1412e8..f2d05e7f4e7 100644 --- a/include/video_console.h +++ b/include/video_console.h @@ -83,6 +83,7 @@ struct vidconsole_priv { int escape_len; int row_saved; int col_saved;
u32 ucs; bool cursor_visible; char escape_buf[32];}; @@ -304,6 +305,14 @@ static inline int vidconsole_memmove(struct udevice *dev, void *dst, return 0; }
+/*
- Convert an UTF-8 byte into the corresponding character in the CP437
- code page. Returns 0 if that character is part of a multi-byte sequence.
- for which *esc holds the state of. Repeatedly feed in more bytes until
- the return value returns a non-0 character.
- */
+uint8_t convert_utf8_to_cp437(uint8_t c, uint32_t *esc);
Just a note that this should be below the next #endif :
#endif
<here>
#endif
2.17.6
Regards, Simon