find_queue_families()

QueueFamilyIndices MayaFlux::Core::VKDevice::find_queue_families ( vk::PhysicalDevice  device, vk::SurfaceKHR  surface = nullptr  )

private

Find queue families on the given physical device.

Parameters

device	Physical device to query
surface	Optional surface to check for presentation support

Returns

QueueFamilyIndices with found queue family indices

Definition at line 103 of file VKDevice.cpp.

{
    QueueFamilyIndices indices;
    auto queue_families = device.getQueueFamilyProperties();
 
    int i = 0;
    for (const auto& queue_family : queue_families) {
        if (queue_family.queueCount > 0 && queue_family.queueFlags & vk::QueueFlagBits::eGraphics) {
            indices.graphics_family = i;
        }
 
        if (queue_family.queueCount > 0 && queue_family.queueFlags & vk::QueueFlagBits::eCompute && !(queue_family.queueFlags & vk::QueueFlagBits::eGraphics)) {
            indices.compute_family = i;
        }
 
        if (queue_family.queueCount > 0 && queue_family.queueFlags & vk::QueueFlagBits::eTransfer && !(queue_family.queueFlags & vk::QueueFlagBits::eGraphics) && !(queue_family.queueFlags & vk::QueueFlagBits::eCompute)) {
            indices.transfer_family = i;
        }
 
        if (surface && queue_family.queueCount > 0) {
            vk::Bool32 presentSupport = device.getSurfaceSupportKHR(i, surface);
            if (presentSupport) {
                indices.present_family = i;
                MF_INFO(Journal::Component::Core, Journal::Context::GraphicsBackend,
                    "Found presentation support in queue family {}", i);
            }
        }
 
        i++;
    }
 
    if (indices.graphics_family.has_value()) {
        if (!indices.compute_family.has_value()) {
            indices.compute_family = indices.graphics_family;
        }
        if (!indices.transfer_family.has_value()) {
            indices.transfer_family = indices.graphics_family;
        }
    }
 
    return indices;
}

References MayaFlux::Core::QueueFamilyIndices::compute_family, MayaFlux::Journal::Core, MayaFlux::Core::QueueFamilyIndices::graphics_family, MayaFlux::Journal::GraphicsBackend, MF_INFO, MayaFlux::Core::QueueFamilyIndices::present_family, and MayaFlux::Core::QueueFamilyIndices::transfer_family.

Referenced by pick_physical_device().

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