coreboot-kgpe-d16/payloads
Yu-Ping Wu b086728094 libpayload: cbgfx: Add draw_line()
Add a function draw_line() to draw either a horizontal or vertical line
segment.

Theoretically a horizontal line can also be drawn by calling
draw_rounded_box() with dim_rel.x being the line length and dim_rel.y
being the line width. However, due to the truncation in integer division
when converting relative coordinates to absolute ones, this will
potentially produce inconsistent line widths, depending on the value of
pos_rel.y.

It is guaranteed that draw_line() will produce consistent line widths,
regardless of the position of the line. Also, when the thickness
argument is zero, this function is able to draw a line with 1-pixel
width, which is not achievable by draw_rounded_box().

BRANCH=puff
BUG=b:146399181, b:161424726
TEST=emerge-puff libpayload

Change-Id: I2d50414c4bfed343516197da9bb50791c89ba4c2
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43508
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Joel Kitching <kitching@google.com>
2020-07-23 05:09:31 +00:00
..
coreinfo treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
external payloads/depthcharge: Makefile: resolve fail of concurrent build 2020-07-15 10:33:13 +00:00
libpayload libpayload: cbgfx: Add draw_line() 2020-07-23 05:09:31 +00:00
linuxcheck treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
nvramcui treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
Kconfig
Makefile.inc treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00