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Since GBM is busted upstream, we can't use this for Wayland or Xorg.
I'm not sure what we are meant to be using it for, but we don't need
it available everywhere in this case.
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See upstream: https://gitlab.freedesktop.org/mesa/mesa/-/issues/12219
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Users can override this by running 'apk add !mesa-amber', but this way
we always install drivers for the older machines when installing Mesa
drivers at all. This way, we don't need to change Horizon etc to
support the older hardware drivers, and users can still remove it if
they know they won't ever need it.
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* Additionally, use GLVND for OpenGL headers.
* Also, use RelWithDebInfo instead of RelWithDebugInfo. This matters
because the target CMake files installed require the build type to
match one of the ones they define, and they define that one.
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* Mesa used for the DRM backend; GLVND for EGL.
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* Mesa still needed for GBM, DRM, KMS.
* Wayland enabled for both EGL and libva.
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These automatically add themselves when the winsys itself is present
(libx11 or wayland), so there should be no functional change for users.
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Mesa is still needed for GBM, but GLVND is needed for EGL.
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* We now have Vulkan support, so add that.
* Use GLVND for GL headers. Mesa remains for DRM.
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* Mesa is used internally for GBM.
* libglvnd-dev is needed for OpenGL headers.
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Includes a patch to the CMake to use libOpenGL and libGLX instead of
the legacy libGL. We also explicitly set GLVND instead of LEGACY for
the FindOpenGL module.
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* Mesa is still used for GBM and KMS.
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* Only OpenGL headers are used, so replace mesa with libglvnd.
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* mesa-dev is still needed for the KMS backend.
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Otherwise, some xf86-video-* fail to build with missing <pciaccess.h>.
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Also, declare ICU dependency explicitly so it isn't missed again.
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We can enable Wayland now. Use libglvnd for EGL and Mesa for GBM.
Ensure wraps are disabled, so it doesn't download its own gl-headers.
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OpenTTD needs grfcodec to have PNG support or it will not build.
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This allows us to put 'firefox-esr' back in the Standard case of Horizon,
because on PPC where firefox-esr isn't available APK will fall back to
Arctic Fox. But on platforms where the real Firefox is available, it will
install that.
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There is no reason to split EGL since all DRI drivers need the EGL
runtime now due to how glvnd works. Similar for GL-API.
Confirmed working well on:
* Intel HD Graphics 3000/4000 (Sandy Bridge, Ivy Bridge)
* NVIDIA Fermi (GeForce GT 520, Quadro 1000M)
* AMD Radeon (r600 on ppc64, with usual known brokenness)
* LLVMpipe on Intel Iris (Raptor Lake)
in both X11 and Wayland environments.
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Does not work on big endian, despite faring slightly better with my patch.
Does not seem to work on 32-bit architectures; not investigated.
See-also: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/issues/2397
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Reported upstream at https://github.com/KhronosGroup/glslang/issues/3799;
I'm not happy with the patch, and I feel like it can be better, but it
works and it unblocks Vulkan for beta6.
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This integrates a patch that is currently sitting upstream in review.
Adding this patch corrects the tools to work on cross-endian binaries,
i.e. a big-endian system can handle little-endian shaders, and vis versa.
See-also: https://github.com/KhronosGroup/SPIRV-Tools/issues/5595
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user/mesa is the latest (24.2.7), and should install everywhere.
user/mesa-be includes 24.1.7 which is needed for proper operation on
big endian platforms, hence it is only enabled for ppc/ppc64.
* Unfortunately, Intel Iris is not portable due to OpenCL issues and
cannot be included with beta6.
* The glvnd JSON file needs to be kept with the driver.
* We can't split GL any more, so don't bother.
* The DRI driver depends on the GLX stub, which is part of mesa, so
declare that dep explicitly. (weak linked, so abuild can't see it)
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