diff options
| author | Hsuan Ting Chen <roccochen@chromium.org> | 2023-02-20 11:49:35 +0800 |
|---|---|---|
| committer | Jakub Czapiga <jacz@semihalf.com> | 2023-04-28 09:39:06 +0000 |
| commit | 26a955507379f6933e4287fbbbae7b618657cf48 (patch) | |
| tree | c3ffaab396978c9022cf37ff5c3498d65f71915b /src/include | |
| parent | 533f1e78d6658f1a21ccdc33f64fe38fd068ee2b (diff) | |
vga: Change the arguments of vga_write_text to support extended ASCII
VGA defined the extended ASCII set based on CP437, but the function
vga_write_text() accepts a signed char array.
This will cause unnecessary confusion that if we want to print u with
umlaut (code=129 in CP437), we need to explicitly cast it to -127 in
signed char.
Since we still want to leverage the built-in string utilities
which only accepts const char*, we still need to cast it to signed char
while processing, and cast it back to unsigned once we write into the
frame buffer.
BRANCH=brya
BUG=b:264666392
TEST=emerge-brya coreboot chromeos-bootimage
Signed-off-by: Hsuan Ting Chen <roccochen@chromium.org>
Change-Id: If555bbc05f40ce3f02339c0468afff6dda8b7ded
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73099
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/pc80/vga.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/include/pc80/vga.h b/src/include/pc80/vga.h index ec012f5bdf..7a97afe5e5 100644 --- a/src/include/pc80/vga.h +++ b/src/include/pc80/vga.h @@ -33,6 +33,7 @@ void vga_line_write(unsigned int line, const char *string); * vga_write_text() writes a line of text aligned left/center/right * horizontally on the screen (i.e. enum VGA_TEXT_ALIGNMENT) */ -void vga_write_text(enum VGA_TEXT_ALIGNMENT alignment, unsigned int line, const char *string); +void vga_write_text(enum VGA_TEXT_ALIGNMENT alignment, unsigned int line, + const unsigned char *ustring); #endif /* VGA_H */ |