C Specification

The VkSwapchainTimingPropertiesEXT structure is defined as:

// Provided by VK_EXT_present_timing
typedef struct VkSwapchainTimingPropertiesEXT {
    VkStructureType    sType;
    void*              pNext;
    uint64_t           refreshDuration;
    uint64_t           refreshInterval;
} VkSwapchainTimingPropertiesEXT;

Members

  • sType is a VkStructureType value identifying this structure.

  • pNext is NULL or a pointer to a structure extending this structure.

  • refreshDuration is zero or an indication of the duration of a refresh cycle.

  • refreshInterval is zero or a duration in nanoseconds indicating the interval between refresh cycle durations.

Description

If refreshDuration is zero, the presentation engine is not able to determine the duration of the refresh cycle. Similarly, if refreshInterval is zero, the presentation engine is not able to determine whether it is operating in VRR mode.

Otherwise, if refreshInterval is the same as refreshDuration, the presentation engine is operating in FRR mode. In this case, refreshDuration is the number of nanoseconds from the start of one refresh cycle to the start of the next refresh cycle.

If refreshInterval is UINT64_MAX, the presentation engine is operating in VRR mode, and refreshDuration is the minimum number of nanoseconds from the start of one refresh cycle to the start of the next refresh cycle.

If refreshDuration and refreshInterval are not zero, refreshInterval is a factor of refreshDuration.

Valid Usage (Implicit)

See Also

VK_EXT_present_timing, VkStructureType, vkGetSwapchainTimingPropertiesEXT

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 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0