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97 lines
2.7 KiB
97 lines
2.7 KiB
4 months ago
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[](https://travis-ci.org/tomba/kmsxx)
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# kms++ - C++ library for kernel mode setting
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kms++ is a C++17 library for kernel mode setting.
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Also included are some simple utilities for KMS and python bindings for kms++.
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## Utilities
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- kmstest - set modes and planes and show test pattern on crtcs/planes, and test page flips
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- kmsprint - print information about DRM objects
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- kmsview - view raw images
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- kmscube - rotating 3D cube on crtcs/planes
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- kmscapture - show captured frames from a camera on screen
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## Dependencies:
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- libdrm
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- Python 3.x (for python bindings)
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## Build instructions:
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To build the Python bindings you need to set up the git-submodule for pybind11:
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```
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git submodule update --init
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```
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And to compile:
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```
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meson build
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ninja -C build
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```
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## Cross compiling instructions:
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```
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meson build --cross-file=<path-to-meson-cross-file>
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ninja -C build
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```
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Here is my cross file for arm32 (where ${BROOT} is path to my buildroot output dir):
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```
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[binaries]
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c = ['ccache', '${BROOT}/host/bin/arm-buildroot-linux-gnueabihf-gcc']
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cpp = ['ccache', '${BROOT}/host/bin/arm-buildroot-linux-gnueabihf-g++']
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ar = '${BROOT}/host/bin/arm-buildroot-linux-gnueabihf-ar'
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strip = '${BROOT}/host/bin/arm-buildroot-linux-gnueabihf-strip'
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pkgconfig = '${BROOT}/host/bin/pkg-config'
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[host_machine]
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system = 'linux'
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cpu_family = 'arm'
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cpu = 'arm'
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endian = 'little'
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```
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## Build options
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You can use meson options to configure the build. E.g.
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```
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meson build -Dbuildtype=debug -Dkmscube=true
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```
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Use `meson configure build` to see all the configuration options and their current values.
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kms++ specific build options are:
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Option name | Values | Default | Notes
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---------------- | ------------- | --------------- | --------
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pykms | true, false | true | Python bindings
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kmscube | true, false | false | GLES kmscube
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omap | enabled, disabled, auto | auto | libdrm-omap support
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## Env variables
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You can use the following runtime environmental variables to control the behavior of kms++.
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Variable | Description
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--------------------------------- | -------------
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KMSXX_DISABLE_UNIVERSAL_PLANES | Set to disable the use of universal planes
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KMSXX_DISABLE_ATOMIC | Set to disable the use of atomic modesetting
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KMSXX_DEVICE | Path to the card device node to use
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KMSXX_DRIVER | Name of the driver to use. The format is either "drvname" or "drvname:idx"
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## Python notes
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You can run the python code directly from the build dir by defining PYTHONPATH env variable. For example:
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```
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PYTHONPATH=build/py py/tests/hpd.py
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```
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