Registered Extension Number

60

Revision

2

Extension and Version Dependencies

  • Requires Vulkan 1.0

Deprecation state

Other Extension Metadata

Last Modified Date

2017-09-05

IP Status

No known IP claims.

Interactions and External Dependencies
  • Promoted to Vulkan 1.1 Core

Contributors
  • Jeff Bolz, NVIDIA

  • Ian Elliott, Google

Description

This extension provides new entry points to query device features, device properties, and format properties in a way that can be easily extended by other extensions, without introducing any further entry points. The Vulkan 1.0 feature/limit/formatproperty structures do not include sType/pNext members. This extension wraps them in new structures with sType/pNext members, so an application can query a chain of feature/limit/formatproperty structures by constructing the chain and letting the implementation fill them in. A new command is added for each vkGetPhysicalDevice* command in core Vulkan 1.0. The new feature structure (and a pNext chain of extending structures) can also be passed in to device creation to enable features.

This extension also allows applications to use the physical-device components of device extensions before vkCreateDevice is called.

Promotion to Vulkan 1.1

All functionality in this extension is included in core Vulkan 1.1, with the KHR suffix omitted. The original type, enum and command names are still available as aliases of the core functionality.

New Enum Constants

  • VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME

  • VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_SPEC_VERSION

  • Extending VkStructureType:

    • VK_STRUCTURE_TYPE_FORMAT_PROPERTIES_2_KHR

    • VK_STRUCTURE_TYPE_IMAGE_FORMAT_PROPERTIES_2_KHR

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2_KHR

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_FORMAT_INFO_2_KHR

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MEMORY_PROPERTIES_2_KHR

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2_KHR

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SPARSE_IMAGE_FORMAT_INFO_2_KHR

    • VK_STRUCTURE_TYPE_QUEUE_FAMILY_PROPERTIES_2_KHR

    • VK_STRUCTURE_TYPE_SPARSE_IMAGE_FORMAT_PROPERTIES_2_KHR

Examples

    // Get features with a hypothetical future extension.
    VkHypotheticalExtensionFeaturesKHR hypotheticalFeatures =
    {
        VK_STRUCTURE_TYPE_HYPOTHETICAL_FEATURES_KHR,                            // sType
        NULL,                                                                   // pNext
    };

    VkPhysicalDeviceFeatures2KHR features =
    {
        VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2_KHR,                       // sType
        &hypotheticalFeatures,                                                  // pNext
    };

    // After this call, features and hypotheticalFeatures have been filled out.
    vkGetPhysicalDeviceFeatures2KHR(physicalDevice, &features);

    // Properties/limits can be chained and queried similarly.

    // Enable some features:
    VkHypotheticalExtensionFeaturesKHR enabledHypotheticalFeatures =
    {
        VK_STRUCTURE_TYPE_HYPOTHETICAL_FEATURES_KHR,                            // sType
        NULL,                                                                   // pNext
    };

    VkPhysicalDeviceFeatures2KHR enabledFeatures =
    {
        VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2_KHR,                       // sType
        &enabledHypotheticalFeatures,                                           // pNext
    };

    enabledFeatures.features.xyz = VK_TRUE;
    enabledHypotheticalFeatures.abc = VK_TRUE;

    VkDeviceCreateInfo deviceCreateInfo =
    {
        VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,                                   // sType
        &enabledFeatures,                                                       // pNext
        ...
        NULL,                                                                   // pEnabledFeatures
    }

    VkDevice device;
    vkCreateDevice(physicalDevice, &deviceCreateInfo, NULL, &device);

Version History

  • Revision 1, 2016-09-12 (Jeff Bolz)

    • Internal revisions

  • Revision 2, 2016-11-02 (Ian Elliott)

    • Added ability for applications to use the physical-device components of device extensions before vkCreateDevice is called.

See Also

Document Notes

For more information, see the Vulkan Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

Copyright (c) 2014-2020 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0