ofxRPI4WindowHDR

DESCRIPTION:

This is an openFrameworks addon for the Raspberry Pi to allow rendering without X

HDR support added to take advantage of DRM linux kernel driver HDR metadata additions

Uses dual planes to allow on the fly switching between SDR overlay plane and HDR primary plane

Exposes HDR metadata and AVI infoframe structures to facilitate UI changes

Extensive logging for debugging

REQUIREMENTS:

• openFrameworks 11, with patches to use float images and allow compiling on Biasilinux armv7l --> (ofx.patch)
• raspberry Pi linux 5.10, with patches to vc4, v3d, drm drivers --> (drm_vc4.patch)
• KMS Driver enabled, thru config.txt(see config.txt)
• Newest Mesa libraries, with patches that add HDR colorspace attributes --> (mesa_hdr.patch)
• Mesa build command line:

CFLAGS="-mcpu=cortex-a72 -mfpu=neon-fp-armv8" CXXFLAGS="-mcpu=cortex-a72 -mfpu=neon-fp-armv8" meson --prefix /usr --libdir lib -D platforms=x11,wayland -D egl-native-platform=drm -D vulkan-drivers=broadcom,swrast -D dri-drivers=i915 -D gallium-drivers=kmsro,v3d,vc4,swrast -D buildtype=debug -D gles1=enabled -D gles2=enabled -D shared-glapi=enabled -D gbm=enabled -D gbm-backends-path=/usr/lib -Dcpp_args="-fPIC" -Dc_args='-fPIC -O2' build

DEPENDENCIES

liburiparser.so.1.0.24

libxshmfence.so.1.0.0

libtinfo.so.6.2.0

libxcb-dri3.so.0.1.0

libxcb-present.so.0.0.0

libxcb-sync.so.1.0.0

libzstd.so.1.5.0

libdrm.so.2.4.0

libLLVM-9.so

mesa libraries as above

Manual Option

Change openFrameworks/libs/openFrameworksCompiled/project/linuxarmv7l/config.linuxarmv7l.default.mk

    ifeq ($(USE_PI_LEGACY), 1)
    	PLATFORM_DEFINES += TARGET_RASPBERRY_PI_LEGACY
        $(info using legacy build)
    else
    	# comment this for older EGL windowing. Has no effect if USE_PI_LEGACY is enabled
    	# GLFW seems to provide a more robust window on newer Raspbian releases
USE_GLFW_WINDOW = 1
    endif

Comment out ofSetupOpenGL in https://github.com/openframeworks/openFrameworks/blob/master/libs/openFrameworks/app/ofAppRunner.cpp#L31

of patch with ofx.patch

PERMISSIONS

User pgenerator needs to be added to video group to allow permission to /dev/dri/card0, /dev/dri/card1, /dev/dri/render128

usermod -a video pgenerator

CREDITS:

derived from https://github.com/matusnovak/rpi-opengl-without-x

https://gitlab.freedesktop.org/mesa/kmscube/tree/master

https://github.com/jvcleave/ofxRPI4Window

https://github.com/popcornmix/xbmc/tree/gbm_matrix