VK_INDEX_TYPE_UINT8_EXT not found when built on Debian 10

[blackball]

Describe the bug VulkanSceneGraph/include/vsg/vk/BindIndexBuffer.h:30:30: error: ‘VK_INDEX_TYPE_UINT8_EXT’ was not declared in this scope case (1): return VK_INDEX_TYPE_UINT8_EXT;

To Reproduce I am using the mesa-vulkan-drivers on Debian 10

sudo apt-get install mesa-vulkan-drivers 

Then just cmake and make.

Expected behavior Since mesa-vulkan-driver is depending on libvulkan1, on Debian10, it's version 1.1+, so I guess it should be supported ?

https://packages.debian.org/buster/mesa-vulkan-drivers https://packages.debian.org/buster/libvulkan1

Desktop (please complete the following information):

• OS: Debian 10

[vsg-dev]

Thanks for the note, I was concerned about the use of extensions in the header but the only way to find out if it's users are building against older headers is to put it out there. Potentially we could add some extra header definitions in to handle this particular case, though I'd rather keep the code as clean for as long as possible.

If you comment this entry out how far does the build get?

[vsg-dev]

Could you check the value of VK_HEADER_VERSION found in your vulkan_core.h?

I've just had a look through the VULKAN_SDK from LunaG I've successively downloaded and the time VK_INDEX_TYPE_UINT8_EXT appears from VK_HEADER_VERSION 121 onwards.

As a workaround for the missing enum I've just checked in the follow commit to master.

https://github.com/vsg-dev/VulkanSceneGraph/commit/c3525a3b8e7e54fddd400e1cebda9bbaba4aa5e4

[blackball]

Comment that line out, the compilation will be succeed.

// Version of this file
#define VK_HEADER_VERSION 97

[vsg-dev]

Do you see any errors with use of enums likes VK_RAY_TRACING_SHADER_GROUP_TYPE_MAX_ENUM_NV?

These are now used without any fallback in the RTX raytracing code.

[blackball]

With the latest version of vsg. The compilation are fine for both vsg and vsgExamples. But when I ran the examples, it will crash. For instance:

./vsgraytracing

Error: vsg::Device::create(...) failed to create logical device.
Error: vsg::Window::create(...) failed to create Window, unable to create Vulkan logical Device.
Could not create windows.

ldd vsgraytracing

    linux-vdso.so.1 (0x00007ffe3edd7000)
    libvulkan.so.1 => /lib/x86_64-linux-gnu/libvulkan.so.1 (0x00007fdeab9b9000)
    libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fdeab998000)
    libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007fdeab96e000)
    libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fdeab7ea000)
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fdeab667000)
    libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fdeab64d000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fdeab48a000)
    libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fdeab485000)
    /lib64/ld-linux-x86-64.so.2 (0x00007fdeabb52000)
    libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007fdeab281000)
    libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007fdeab07b000)
    libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007fdeab061000)
    librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fdeab055000)

[vsg-dev]

Did vsgraytracing crash or just exit after reporting it couldn't create the required window.

If your driver/hardware don't support RTX ray tracing then the VSG won't be able to create a device/window to do it so that part of the behavior is normal. My guess is that mesa doesn't yet support the extension. The RTX ray tracing is an NVidia extensions. Just yesterday Khronos announced provision ray tracing API based on the RTX work from NVidia, so I'll move the code across to this once I have the opportunity.

[blackball]

Sorry for the late reply.

I checked the mesa version I installed, you are right, it doesn't support that extension. Also I was running the examples on a machine with just an Intel i7.

Thanks for your great work.