图形设备供应商的标识符代码（只读）。
此为用户显卡的 PCI 供应商 ID。该编号用于唯一标识特定的显卡制造商。
该编号在所有操作系统和驱动程序版本中都相同。
注意，当运行 Vulkan 时，仅在 PC (Windows/Mac/Linux) 平台和 Android 上实现了设备 ID；
在其他平台上，如果需要，您将不得不进行基于名称的检测。
有关供应商 ID 的列表，请参阅 pci-ids.ucw.cz。
另请参阅：SystemInfo.graphicsDeviceID、SystemInfo.graphicsDeviceVendor。
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