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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)
This commit is contained in:
Daisuke Nojiri 2015-08-12 18:49:50 -07:00 committed by Patrick Georgi
parent abe03d25e2
commit ccda446e52
2 changed files with 33 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
payloads/libpayload/drivers/video/video.c
View File

@ -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;

9
payloads/libpayload/include/libpayload.h
View File

@ -210,7 +210,14 @@ void video_console_set_cursor(unsigned int cursorx, unsigned int cursory);
* print characters on video console with colors. note that there is a size
* restriction for the internal buffer. so, output string can be truncated.
*/
void video_printf(int foreground, int background, const char *fmt, ...);
enum video_printf_align {
VIDEO_PRINTF_ALIGN_KEEP = 0,
VIDEO_PRINTF_ALIGN_LEFT,
VIDEO_PRINTF_ALIGN_CENTER,
VIDEO_PRINTF_ALIGN_RIGHT,
};
void video_printf(int foreground, int background, enum video_printf_align align,
const char *fmt, ...);
/** @} */
/**