CODEWITHSUNDEEP
c++vulkan
Omar Martinez
Omar Martinez

Reputation: 708

Can a physical device have zero instance layers?

I have a valid Physical Device: m_physicalDevice[0].

I am trying to check the supported layers by my physical device:

    uint32_t physicalLayerCount;
    std::vector<VkLayerProperties> vkDeviceLP;
    result = vkEnumerateDeviceLayerProperties(m_physicalDevice[0], &physicalLayerCount, nullptr);
    if (physicalLayerCount > 0)
    {
        vkDeviceLP.resize(physicalLayerCount);
        vkEnumerateDeviceLayerProperties(m_physicalDevice[0], &physicalLayerCount, vkDeviceLP.data());
    }

I've verified that:

•The physical device is valid

•result is equal to VK_SUCCESS

The problem here is that physicalLayerCount is = 0, so the code doesn't run the physicalLayerCount > 0 loop. Is it a hardware problem or is something wrong with my code?

(r9 270X is my GPU)

Upvotes: 1

Views: 81

Answers (1)

Jesse Hall
Jesse Hall

Reputation: 6797

Device layers are deprecated, you shouldn't normally need to query them. For compatibility reasons, it's best to provide the same list of layers when you create a device that you did when creating the instance.

Apart from that, though, it's normal for there to be no layers of any kind: that's the common case on computers that don't have the Vulkan SDK or something like RenderDoc installed; normally only developers have those.

Upvotes: 1

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