kms++ is a C++11 library for kernel mode setting.
Also included are some simple utilities for KMS and python bindings for kms++.
- kmstest - set modes and planes and show test pattern on crtcs/planes, and test page flips
- kmsprint - print information about DRM objects
- kmsview - view raw images
- kmscube - rotating 3D cube on crtcs/planes
- kmscapture - show captured frames from a camera on screen
- libdrm
- Python 3.x (for python bindings)
To build the Python bindings you need to set up the git-submodule for pybind11:
git submodule update --init
And to compile:
$ mkdir build
$ cd build
$ cmake ..
$ make -j4
Directions for cross compiling depend on your environment.
These are for mine with buildroot:
$ mkdir build
$ cd build
$ cmake -DCMAKE_TOOLCHAIN_FILE=<buildrootpath>/output/host/usr/share/buildroot/toolchainfile.cmake ..
$ make -j4
Your environment may provide similar toolchainfile. If not, you can create a toolchainfile of your own, something along these lines:
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)
You can use the following cmake flags to control the build. Use -DFLAG=VALUE
to set them.
Option name | Values | Default | Notes |
---|---|---|---|
CMAKE_BUILD_TYPE | Release/Debug | Release | |
BUILD_SHARED_LIBS | ON/OFF | OFF | |
KMSXX_ENABLE_PYTHON | ON/OFF | ON | |
KMSXX_ENABLE_KMSCUBE | ON/OFF | OFF |
You can use the following runtime environmental variables to control the behavior of kms++.
Variable | Description |
---|---|
KMSXX_DISABLE_UNIVERSAL_PLANES | Set to disable the use of universal planes |
KMSXX_DISABLE_ATOMIC | Set to disable the use of atomic modesetting |