libkms++ - C++ library for kernel mode setting

libkms++ is a C++11 library for kernel mode setting.

Also included are simple test tools for KMS and python wrapper for libkms++.

Test tools

• kmsprint - print information about DRM objects
• testpat - set modes and show test pattern on crtcs/planes
• kmsview - view raw images
• db - simple double-buffering test
• kmscube - rotating 3D cube on crtcs/planes

Dependencies:

• libdrm
• SWIG 3.x (for python bindings)
• Python 3.x (for python bindings)

Build instructions:

$ mkdir build
$ cd build
$ cmake ..
$ make -j4

Cross compiling instructions:

Directions for cross compiling depend on your environment. These are for mine (buildroot):

As above, but specify -DCMAKE_TOOLCHAIN_FILE=<path>/your-toolchain.cmake for cmake, where your-toolchain.cmake is something similar to:

SET(CMAKE_SYSTEM_NAME Linux)

SET(BROOT "<buildroot>/output/")

# specify the cross compiler
SET(CMAKE_C_COMPILER   ${BROOT}/host/usr/bin/arm-buildroot-linux-gnueabihf-gcc)
SET(CMAKE_CXX_COMPILER ${BROOT}/host/usr/bin/arm-buildroot-linux-gnueabihf-g++)

# where is the target environment
SET(CMAKE_FIND_ROOT_PATH ${BROOT}/target ${BROOT}/host)

SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

Build options

You can use the following cmake flags to control the build. Use -DFLAG=VALUE to set them.

Option name	Values	Default
CMAKE_BUILD_TYPE	Release/Debug	Release
LIBKMS_ENABLE_PYTHON	ON/OFF	ON
LIBKMS_ENABLE_KMSCUBE	ON/OFF	OFF

Env variables

You can use the following environmental variables to control the behavior of libkms.

Variable	Description
LIBKMSXX_DISABLE_UNIVERSAL_PLANES	Set to disable the use of universal planes
LIBKMSXX_DISABLE_ATOMIC	Set to disable the use of atomic modesetting