VK_QUEUE_GRAPHICS_BIT is an enumerant, not a queue family index. So that code is fundamentally incorrect.
The graphicsQueue() method of QVulkanWindow returns a VkQueue you can use.
I am using the QVulkanWindow example, trying to load an image and display it in the Qt window.
This sets up the Vulkan instance:
if (!inst.create())
qFatal("Failed to create Vulkan instance: %d", inst.errorCode());
VulkanWindow w;
w.setVulkanInstance(&inst);
Now in initResources() of the VulkanRenderer class I want to get the GraphicsQueue from the device:
m_devFuncs->vkGetDeviceQueue(device, VK_QUEUE_GRAPHICS_BIT, 0, &graphicsQueue);
The error I get is:
vkDebug: Validation: 0: [ VUID-vkGetDeviceQueue-queueFamilyIndex-00384 ] Object: 0x564e779a5f90 (Type = 3) |
vkGetDeviceQueue: queueFamilyIndex (= 1) is not one of the queue families given via VkDeviceQueueCreateInfo structures when the device was created.
The Vulkan spec states: queueFamilyIndex must be one of the queue family indices specified when device was created, via the VkDeviceQueueCreateInfo structure
Did Qt not set up the Graphics Queue? Or am I doing it wrong? Or should I create my own VkInstance and pass it to Qt?
VK_QUEUE_GRAPHICS_BIT is an enumerant, not a queue family index. So that code is fundamentally incorrect.
The graphicsQueue() method of QVulkanWindow returns a VkQueue you can use.
It is a type error, practically. Shame that compiler does not stop this, as historically enumerant is implicitly converted to int.