2b451c81a3
Requesting a given "adapter" (or whatever the native equivalent of that is, e.g. a VkPhysicalDevice with Vulkan) has already been possible either via the index-based environment-variables (QT_D3D_ADAPTER_INDEX and QT_VK_PHYSICAL_DEVICE_INDEX), or by passing in a VkPhysicalDevice in QRhiVulkanNativeHandles or an adapter LUID in QD3D1xNativeHandles to create(). (the latter is what QQuickGraphicsDevice's fromAdapter() or fromPhysicalDevice() builds on, and is one of the enablers for the OpenXR integration in Qt Quick 3D for instance) There was however no way to enumerate the adapters via QRhi APIs, in order to implement something such as "iterate through the available adapters and choose one from the list", without resorting directly to DXGI or Vulkan. This is what enumerateAdapters() enables now. Implemented for D3D11, D3D12, and Vulkan. There are no plans to implement it for others for now. (meaning the resulting list is always empty then) For symmetry, it is also possible to get a single QRhiAdapter based on a provided native adapter identity (i.e, LUID or VkPhysicalDevice), although in practice that is just a heavier way to achieve the same that was already possible by passing those native handles directly to create() instead of going through a QRhiAdapter. [ChangeLog][RHI] Introduced enumerateAdapters() in QRhi to provide a an abstraction for enumerating adapters (physical devices) with Direct 3D and Vulkan. Fixes: QTBUG-129932 Change-Id: I072553afe594cbad6ebfa1ffe849a782c4c181db Reviewed-by: Andy Nichols <andy.nichols@qt.io> Reviewed-by: Kristoffer Skau <kristoffer.skau@qt.io>