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According to CMake's find_package(OpenGL), setting this should allow for
a vendor neutral distribution of Wayland and EGL:
set(OpenGL_GL_PREFERENCE GLVND)
find_package(OpenGL REQUIRED)
...etc...
list(APPEND LIBRARIES OpenGL::OpenGL OpenGL::EGL)
target_link_libraries(mrv2 PUBLIC ${LIBRARIES} )
But it does not seem to work for me. My application with FLTK and GLFW
both latest (compiled on Rocky Linux 8.9 and running on Ubuntu 22.04.4
LTS) starts fine but always loads Mesa's libEGL.
Google's Gemini told me about these variables:
The system searches for directories or files specified by environment
variables:
__EGL_VENDOR_LIBRARY_FILENAMES: This variable takes a colon-separated
list of JSON files describing available ICDs.
__EGL_VENDOR_LIBRARY_DIRS: This variable takes a colon-separated list of
directories containing JSON files for ICDs.
I set them to:
> echo $__EGL_VENDOR_LIBRARY_DIRS
/usr/share/glvnd/
> echo $__EGL_VENDOR_LIBRARY_FILENAMES
10_nvidia.json:50_mesa.json
And then my application does not start and gives me the weird error:
GLFW ERROR: EGL: Failed to get EGL display: Success
ERROR: Cannot create window
The reason I want load NVidia's EGL instead of Mesa's EGL is one of
performance. Mesa's EGL plays 4K movies at 16 FPS while NVidia's EGL
plays them at a perfect 60 FPS.
Manolo and Albrecht, can you help?
--
Gonzalo Garramuño
ggarra13@gmail.com
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