VkSwapchainTimingPropertiesEXT

The VkSwapchainTimingPropertiesEXT structure is defined as:

typedef struct VkSwapchainTimingPropertiesEXT {
    VkStructureType sType;
    void* pNext;
    uint64_t refreshDuration;
    uint64_t refreshInterval;
} VkSwapchainTimingPropertiesEXT;

pub struct SwapchainTimingPropertiesEXT {
    s_type: vk::StructureType,
    p_next: *mut c_void,
    refresh_duration: u64, // Number of nanoseconds from the start of one refresh cycle to the next
    refresh_interval: u64, // Interval in nanoseconds between refresh cycles durations
}

• 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.

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.