coreboot-kgpe-d16/payloads/libpayload
Yu-Ping Wu a26986e1a7 libpayload: cbgfx: Support drawing a box with rounded corners
A function draw_rounded_box() is added to draw a box with rounded
corners. In addition, this function is different from draw_box() in 2
ways:
- The position and size arguments are relative to the canvas.
- This function supports drawing only the border of a box (linear time
  complexity when the thickness is fixed).

BRANCH=none
BUG=b:146105976
TEST=emerge-nami libpayload

Change-Id: Ie480410d2fd8316462d5ff874999ae2317de04f9
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37757
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
2020-01-14 18:25:36 +00:00
..
arch printf: Automatically prefix %p with 0x 2019-12-11 11:38:59 +00:00
bin Remove MIPS architecture 2019-11-20 10:10:48 +00:00
configs trogdor: libpayload USB support 2019-12-05 17:57:31 +00:00
crypto
curses libpayload: Enable -Wimplicit-fallthrough 2019-07-21 17:17:42 +00:00
drivers libpayload: cbgfx: Support drawing a box with rounded corners 2020-01-14 18:25:36 +00:00
gdb
include libpayload: cbgfx: Support drawing a box with rounded corners 2020-01-14 18:25:36 +00:00
libc lib/coreboot_table: Add CBMEM_ID_VBOOT_WORKBUF pointer to coreboot table 2019-12-02 13:00:45 +00:00
libcbfs printf: Automatically prefix %p with 0x 2019-12-11 11:38:59 +00:00
liblz4
liblzma
libpci
sample Remove MIPS architecture 2019-11-20 10:10:48 +00:00
tests
Doxyfile
Kconfig libpayload/drivers/i8042: Remove obsolete flag 2019-12-12 22:03:31 +00:00
LICENSES
LICENSE_GPL
Makefile Makefile: Remove romcc 2019-12-27 08:59:59 +00:00
Makefile.inc Remove MIPS architecture 2019-11-20 10:10:48 +00:00
README payloads/libpayload: Update a Makefile for sample libpayload 2019-06-21 09:16:36 +00:00

README

-------------------------------------------------------------------------------
libpayload README
-------------------------------------------------------------------------------

libpayload is a minimal library to support standalone payloads
that can be booted with firmware like coreboot. It handles the setup
code, and provides common C library symbols such as malloc() and printf().

Note: This is _not_ a standard library for use with an operating system,
rather it's only useful for coreboot payload development!
See https://www.coreboot.org for details on coreboot.


Installation
------------

 $ git clone https://review.coreboot.org/coreboot.git

 $ cd coreboot/payloads/libpayload

 $ make menuconfig

 $ make

 $ make install (optional, will install into ./install per default)

On x86 systems, libpayload will always be 32-bit even if your host OS runs
in 64-bit, so you might have to install the 32-bit libgcc version.
On Debian systems you'd do 'apt-get install gcc-multilib' for example.

Run 'make distclean' before switching boards. This command will remove
your current .config file, so you need 'make menuconfig' again or
'make defconfig' in order to set up configuration. Default configuration
is based on 'configs/defconfig'. See the configs/ directory for examples
of configuration.


Usage
-----

Here's an example of a very simple payload (hello.c) and how to build it:

 #include <libpayload.h>

 int main(void)
 {
     printf("Hello, world!\n");
     return 0;
 }

Building the payload using the 'lpgcc' compiler wrapper:

 $ lpgcc -o hello.elf hello.c

Please see the sample/ directory for details.


Website and Mailing List
------------------------

The main website is https://www.coreboot.org/Libpayload.

For additional information, patches, and discussions, please join the
coreboot mailing list at https://www.coreboot.org/Mailinglist, where most
libpayload developers are subscribed.


Copyright and License
---------------------

See LICENSES.