Framework for getting device information

[c0d3st0rm]

There are certain extensions like VK_AMD_shader_core_properties which could be useful in a compute scenario, as Vulkan does not (to my knowledge) provide an offical method of getting device information, for example the number of compute units. The information from VK_AMD_shader_core_properties could be exposed via vuh::Device with a function, for example

auto getShaderCorePropertiesAMD()-> vk::PhysicalDeviceShaderCorePropertiesAMD;

However I'm unsure if this is an approach that vuh would benefit from - it is specific to AMD devices and, while you could load it implicitly and then add runtime checks to the getShaderCorePropertiesAMD call (throwing an error if VK_AMD_shader_core_properties was not loaded), it might be better to have a more generic device information function. This could be implemented for AMD GPUs using VK_AMD_shader_core_properties, however that would only be possible if respective/similar extensions for Intel and Nvidia GPUs existed (I have not checked) and shared a "common" way of describing a GPU's internals, or enough information to provide the results in a generic manner - this is available to an extent with OpenCL (for example using CL_DEVICE_MAX_COMPUTE_UNITS), however even that is imperfect - for example, see https://stackoverflow.com/a/9326978.