Support for device groups

src/Vulkan/libVulkan.cpp

@@ -288,6 +288,17 @@ VKAPI_ATTR VkResult VKAPI_CALL vkCreateDevice(VkPhysicalDevice physicalDevice, c
 				}
 			}
 			break;
+		case VK_STRUCTURE_TYPE_DEVICE_GROUP_DEVICE_CREATE_INFO:
+			{
+				const VkDeviceGroupDeviceCreateInfo* groupDeviceCreateInfo = reinterpret_cast<const VkDeviceGroupDeviceCreateInfo*>(extensionCreateInfo);
+
+				if((groupDeviceCreateInfo->physicalDeviceCount != 1) ||
+				   (groupDeviceCreateInfo->pPhysicalDevices[0] != physicalDevice))
+				{
+					return VK_ERROR_FEATURE_NOT_PRESENT;
+				}
+			}
+			break;
 		default:
 			// "the [driver] must skip over, without processing (other than reading the sType and pNext members) any structures in the chain with sType values not defined by [supported extenions]"
 			UNIMPLEMENTED();   // TODO(b/119321052): UNIMPLEMENTED() should be used only for features that must still be implemented. Use a more informational macro here.