# VkDeviceCreateInfo(3) Manual Page

## Name

VkDeviceCreateInfo - Structure specifying parameters of a newly created device

## C Specification

The `VkDeviceCreateInfo` structure is defined as:

    typedef struct VkDeviceCreateInfo {
        VkStructureType                    sType;
        const void*                        pNext;
        VkDeviceCreateFlags                flags;
        uint32_t                           queueCreateInfoCount;
        const VkDeviceQueueCreateInfo*     pQueueCreateInfos;
        uint32_t                           enabledLayerCount;
        const char* const*                 ppEnabledLayerNames;
        uint32_t                           enabledExtensionCount;
        const char* const*                 ppEnabledExtensionNames;
        const VkPhysicalDeviceFeatures*    pEnabledFeatures;
    } VkDeviceCreateInfo;

## Members

- `sType` is the type of this structure.

- `pNext` is `NULL` or a pointer to an extension-specific structure.

- `flags` is reserved for future use.

- `queueCreateInfoCount` is the unsigned integer size of the `pQueueCreateInfos` array. Refer to the Queue Creation section below for further details.

- `pQueueCreateInfos` is a pointer to an array of VkDeviceQueueCreateInfo structures describing the queues that are requested to be created along with the logical device. Refer to the Queue Creation section below for further details.

- `enabledLayerCount` is deprecated and ignored.

- `ppEnabledLayerNames` is deprecated and ignored. See https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#extendingvulkan-layers-devicelayerdeprecation.

- `enabledExtensionCount` is the number of device extensions to enable.

- `ppEnabledExtensionNames` is a pointer to an array of `enabledExtensionCount` null-terminated UTF-8 strings containing the names of extensions to enable for the created device. See the https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#extendingvulkan-extensions section for further details.

- `pEnabledFeatures` is `NULL` or a pointer to a VkPhysicalDeviceFeatures structure containing boolean indicators of all the features to be enabled. Refer to the Features section for further details.

## Description

Valid Usage

- The `queueFamilyIndex` member of each element of `pQueueCreateInfos` must be unique within `pQueueCreateInfos`, except that two members can share the same `queueFamilyIndex` if one is a protected-capable queue and one is not a protected-capable queue

- If the `pNext` chain includes a VkPhysicalDeviceFeatures2 structure, then `pEnabledFeatures` must be `NULL`

- `ppEnabledExtensionNames` must not contain `https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_AMD_negative_viewport_height`

- `ppEnabledExtensionNames` must not contain both `https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_KHR_buffer_device_address` and `https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_EXT_buffer_device_address`

- If the `pNext` chain includes a VkPhysicalDeviceVulkan11Features structure, then it must not include a VkPhysicalDevice16BitStorageFeatures, VkPhysicalDeviceMultiviewFeatures, VkPhysicalDeviceVariablePointersFeatures, VkPhysicalDeviceProtectedMemoryFeatures, VkPhysicalDeviceSamplerYcbcrConversionFeatures, or VkPhysicalDeviceShaderDrawParametersFeatures structure

- If the `pNext` chain includes a VkPhysicalDeviceVulkan12Features structure, then it must not include a VkPhysicalDevice8BitStorageFeatures, VkPhysicalDeviceShaderAtomicInt64Features, VkPhysicalDeviceShaderFloat16Int8Features, VkPhysicalDeviceDescriptorIndexingFeatures, VkPhysicalDeviceScalarBlockLayoutFeatures, VkPhysicalDeviceImagelessFramebufferFeatures, VkPhysicalDeviceUniformBufferStandardLayoutFeatures, VkPhysicalDeviceShaderSubgroupExtendedTypesFeatures, VkPhysicalDeviceSeparateDepthStencilLayoutsFeatures, VkPhysicalDeviceHostQueryResetFeatures, VkPhysicalDeviceTimelineSemaphoreFeatures, VkPhysicalDeviceBufferDeviceAddressFeatures, or VkPhysicalDeviceVulkanMemoryModelFeatures structure

- If `ppEnabledExtensions` contains `"VK_KHR_draw_indirect_count"` and the `pNext` chain includes a VkPhysicalDeviceVulkan12Features structure, then `VkPhysicalDeviceVulkan12Features`::`drawIndirectCount` must be `VK_TRUE`

- If `ppEnabledExtensions` contains `"VK_KHR_sampler_mirror_clamp_to_edge"` and the `pNext` chain includes a VkPhysicalDeviceVulkan12Features structure, then `VkPhysicalDeviceVulkan12Features`::`samplerMirrorClampToEdge` must be `VK_TRUE`

- If `ppEnabledExtensions` contains `"VK_EXT_descriptor_indexing"` and the `pNext` chain includes a VkPhysicalDeviceVulkan12Features structure, then `VkPhysicalDeviceVulkan12Features`::`descriptorIndexing` must be `VK_TRUE`

- If `ppEnabledExtensions` contains `"VK_EXT_sampler_filter_minmax"` and the `pNext` chain includes a VkPhysicalDeviceVulkan12Features structure, then `VkPhysicalDeviceVulkan12Features`::`samplerFilterMinmax` must be `VK_TRUE`

- If `ppEnabledExtensions` contains `"VK_EXT_shader_viewport_index_layer"` and the `pNext` chain includes a VkPhysicalDeviceVulkan12Features structure, then `VkPhysicalDeviceVulkan12Features`::`shaderOutputViewportIndex` and `VkPhysicalDeviceVulkan12Features`::`shaderOutputLayer` must both be `VK_TRUE`

Valid Usage (Implicit)

- `sType` must be `VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO`

- Each `pNext` member of any structure (including this one) in the `pNext` chain must be either `NULL` or a pointer to a valid instance of VkDeviceDiagnosticsConfigCreateInfoNV, VkDeviceGroupDeviceCreateInfo, VkDeviceMemoryOverallocationCreateInfoAMD, VkPhysicalDevice16BitStorageFeatures, VkPhysicalDevice8BitStorageFeatures, VkPhysicalDeviceASTCDecodeFeaturesEXT, VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT, VkPhysicalDeviceBufferDeviceAddressFeatures, VkPhysicalDeviceBufferDeviceAddressFeaturesEXT, VkPhysicalDeviceCoherentMemoryFeaturesAMD, VkPhysicalDeviceComputeShaderDerivativesFeaturesNV, VkPhysicalDeviceConditionalRenderingFeaturesEXT, VkPhysicalDeviceCooperativeMatrixFeaturesNV, VkPhysicalDeviceCornerSampledImageFeaturesNV, VkPhysicalDeviceCoverageReductionModeFeaturesNV, VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV, VkPhysicalDeviceDepthClipEnableFeaturesEXT, VkPhysicalDeviceDescriptorIndexingFeatures, VkPhysicalDeviceDeviceGeneratedCommandsFeaturesNV, VkPhysicalDeviceDiagnosticsConfigFeaturesNV, VkPhysicalDeviceExclusiveScissorFeaturesNV, VkPhysicalDeviceFeatures2, VkPhysicalDeviceFragmentDensityMapFeaturesEXT, VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV, VkPhysicalDeviceFragmentShaderInterlockFeaturesEXT, VkPhysicalDeviceHostQueryResetFeatures, VkPhysicalDeviceImagelessFramebufferFeatures, VkPhysicalDeviceIndexTypeUint8FeaturesEXT, VkPhysicalDeviceInlineUniformBlockFeaturesEXT, VkPhysicalDeviceLineRasterizationFeaturesEXT, VkPhysicalDeviceMemoryPriorityFeaturesEXT, VkPhysicalDeviceMeshShaderFeaturesNV, VkPhysicalDeviceMultiviewFeatures, VkPhysicalDevicePerformanceQueryFeaturesKHR, VkPhysicalDevicePipelineCreationCacheControlFeaturesEXT, VkPhysicalDevicePipelineExecutablePropertiesFeaturesKHR, VkPhysicalDeviceProtectedMemoryFeatures, VkPhysicalDeviceRayTracingFeaturesKHR, VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV, VkPhysicalDeviceSamplerYcbcrConversionFeatures, VkPhysicalDeviceScalarBlockLayoutFeatures, VkPhysicalDeviceSeparateDepthStencilLayoutsFeatures, VkPhysicalDeviceShaderAtomicInt64Features, VkPhysicalDeviceShaderClockFeaturesKHR, VkPhysicalDeviceShaderDemoteToHelperInvocationFeaturesEXT, VkPhysicalDeviceShaderDrawParametersFeatures, VkPhysicalDeviceShaderFloat16Int8Features, VkPhysicalDeviceShaderImageFootprintFeaturesNV, VkPhysicalDeviceShaderIntegerFunctions2FeaturesINTEL, VkPhysicalDeviceShaderSMBuiltinsFeaturesNV, VkPhysicalDeviceShaderSubgroupExtendedTypesFeatures, VkPhysicalDeviceShadingRateImageFeaturesNV, VkPhysicalDeviceSubgroupSizeControlFeaturesEXT, VkPhysicalDeviceTexelBufferAlignmentFeaturesEXT, VkPhysicalDeviceTextureCompressionASTCHDRFeaturesEXT, VkPhysicalDeviceTimelineSemaphoreFeatures, VkPhysicalDeviceTransformFeedbackFeaturesEXT, VkPhysicalDeviceUniformBufferStandardLayoutFeatures, VkPhysicalDeviceVariablePointersFeatures, VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT, VkPhysicalDeviceVulkan11Features, VkPhysicalDeviceVulkan12Features, VkPhysicalDeviceVulkanMemoryModelFeatures, or VkPhysicalDeviceYcbcrImageArraysFeaturesEXT

- The `sType` value of each struct in the `pNext` chain must be unique

- `flags` must be `0`

- `pQueueCreateInfos` must be a valid pointer to an array of `queueCreateInfoCount` valid VkDeviceQueueCreateInfo structures

- If `enabledLayerCount` is not `0`, `ppEnabledLayerNames` must be a valid pointer to an array of `enabledLayerCount` null-terminated UTF-8 strings

- If `enabledExtensionCount` is not `0`, `ppEnabledExtensionNames` must be a valid pointer to an array of `enabledExtensionCount` null-terminated UTF-8 strings

- If `pEnabledFeatures` is not `NULL`, `pEnabledFeatures` must be a valid pointer to a valid VkPhysicalDeviceFeatures structure

- `queueCreateInfoCount` must be greater than `0`

## See Also

VkDeviceCreateFlags, VkDeviceQueueCreateInfo, VkPhysicalDeviceFeatures, VkStructureType, vkCreateDevice

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.