Vulkan in Qt on macOS?

jdavis

I'm trying to work my way through the standard Vulkan-in-Qt examples in Qt Creator's Welcome mode: Hello Vulkan Window, Hello Vulkan Triangle, etc. They fail to build, giving the same error messages as in the unanswered thread linked above: "unknown class name QVulkanWindowRenderer", etc. Any advice?

Searching the Web yields answers about editing .pro files (these examples have none), about Qt 5 (which might be out of date), etc.

Sorry if this is a newbie question. I am new to Qt. (I'm trying to evaluate it for a new project I'm starting.) I've been programming Vulkan for a year using non-Qt APIs. I can build various non-Vulkan Qt examples.

macOS Monterey 12.6.3
Qt 6, Qt Creator 9.0.1
LunarG Vulkan SDK, Vulkan 1.3.204.1, moltenVK

jsulm

@jdavis What exact Qt version do you use?

jdavis

Sorry about that. It's Qt 6.4.1.

(The Qt MaintenanceTool says that I have Qt 1.0.17 and I should update to Qt 1.0.18 released 2023-01-11. That must be something else.)

SimonSchroeder

macOS does not support Vulkan (out of the box). As you know you need MoltenVK for that. I expect that the pre-compiled Qt libraries are not compiled with Vulkan support (because MoltenVK is not available by default). In this case you'd need to compile Qt yourself together with Vulkan support enabled.

jdavis

Thank you. I will look into that next.