DevicePreference

enum class MayaFlux::Core::GraphicsBackendInfo::DevicePreference : uint8_t

strong

Preferred physical device class when no explicit selector matches.

AUTO scores discrete above integrated above virtual above everything else. The other values pin the class; if no device of that class survives the presentation and extension filters, selection falls back to AUTO ordering unless strict_device_selection is set.

EXTERNAL is a heuristic, not a device type. Vulkan reports an external GPU as DISCRETE GPU, indistinguishable from a built-in one. EXTERNAL therefore means DISCRETE plus a preference for the highest PCI bus number, since a Thunderbolt-attached device sits behind a PCIe switch well above the root complex. It requires VK_EXT_pci_bus_info; without that extension EXTERNAL behaves as DISCRETE and says so in the log.

Enumerator
AUTO
DISCRETE
INTEGRATED
VIRTUAL
EXTERNAL

Definition at line 50 of file GlobalGraphicsInfo.hpp.

                                : uint8_t {
        AUTO,
        DISCRETE,
        INTEGRATED,
        VIRTUAL,
        EXTERNAL
    } device_preference = DevicePreference::AUTO;