diff options
| author | Daisuke Nojiri <dnojiri@chromium.org> | 2015-08-12 18:49:50 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-09-08 11:51:55 +0000 |
| commit | ccda446e5204c99a98867f93113eea2a71b1c4c4 (patch) | |
| tree | 69972ac95527a2057f98b5f4a893d38bf3492b24 /payloads/libpayload/drivers/video/video.c | |
| parent | abe03d25e2890eec96df5b8e8372a9b5a1ffd1d0 (diff) | |
video_printf: align text
This change allows video_printf to left/center/right-align text depending on
the enum value provided by the caller. This is useful especially because usually
the length of formatted string is unknown before calling video_printf.
BUG=none
BRANCH=smaug
TEST=drew fastboot screens on Smaug
CQ-DEPEND=CL:296460
Reviewed-on: https://chromium-review.googlesource.com/292929
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit 436f05f60c1b88626740a35913e3ad37b5c777a3)
Change-Id: If1d50b7d8ddaa86eddc1618946756184cb87bfe1
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/295413
Reviewed-on: http://review.coreboot.org/11583
Tested-by: build bot (Jenkins)
Diffstat (limited to 'payloads/libpayload/drivers/video/video.c')
| -rw-r--r-- | payloads/libpayload/drivers/video/video.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/video/video.c b/payloads/libpayload/drivers/video/video.c index f183517881..71140f06ba 100644 --- a/payloads/libpayload/drivers/video/video.c +++ b/payloads/libpayload/drivers/video/video.c @@ -162,7 +162,8 @@ void video_console_putchar(unsigned int ch) video_console_fixup_cursor(); } -void video_printf(int foreground, int background, const char *fmt, ...) +void video_printf(int foreground, int background, enum video_printf_align align, + const char *fmt, ...) { int i = 0, len; char str[200]; @@ -174,6 +175,29 @@ void video_printf(int foreground, int background, const char *fmt, ...) if (len <= 0) return; + /* vsnprintf can return len larger than size. when it happens, + * only size-1 characters have been actually written. */ + if (len >= ARRAY_SIZE(str)) + len = ARRAY_SIZE(str) - 1; + + if (len > console->columns) { + cursorx = 0; + } else { + switch (align) { + case VIDEO_PRINTF_ALIGN_LEFT: + cursorx = 0; + break; + case VIDEO_PRINTF_ALIGN_CENTER: + cursorx = (console->columns - len) / 2; + break; + case VIDEO_PRINTF_ALIGN_RIGHT: + cursorx = console->columns - len; + break; + default: + break; + } + } + foreground &= 0xf; foreground <<= 8; background &= 0xf; |