Vulkan.Extensions.VK_KHR_device_group

VkSurfaceKHR - Opaque handle to a surface object

Description

The VK_KHR_surface extension declares the SurfaceKHR object, and provides a function for destroying SurfaceKHR objects. Separate platform-specific extensions each provide a function for creating a SurfaceKHR object for the respective platform. From the application’s perspective this is an opaque handle, just like the handles of other Vulkan objects.

See Also

VK_DEFINE_NON_DISPATCHABLE_HANDLE, VK_KHR_surface, PhysicalDeviceSurfaceInfo2KHR, SwapchainCreateInfoKHR, createAndroidSurfaceKHR, createDirectFBSurfaceEXT, createDisplayPlaneSurfaceKHR, createHeadlessSurfaceEXT, createIOSSurfaceMVK, createImagePipeSurfaceFUCHSIA, createMacOSSurfaceMVK, createMetalSurfaceEXT, createScreenSurfaceQNX, createStreamDescriptorSurfaceGGP, vkCreateSurfaceOHOS, vkCreateUbmSurfaceSEC, createViSurfaceNN, createWaylandSurfaceKHR, createWin32SurfaceKHR, createXcbSurfaceKHR, createXlibSurfaceKHR, destroySurfaceKHR, getDeviceGroupSurfacePresentModesKHR, getPhysicalDevicePresentRectanglesKHR, getPhysicalDeviceSurfaceCapabilities2EXT, getPhysicalDeviceSurfaceCapabilitiesKHR, getPhysicalDeviceSurfaceFormatsKHR, getPhysicalDeviceSurfacePresentModesKHR, getPhysicalDeviceSurfaceSupportKHR

VkSwapchainKHR - Opaque handle to a swapchain object

Description

A swapchain is an abstraction for an array of presentable images that are associated with a surface. The presentable images are represented by Image objects created by the platform. One image (which can be an array image for multiview/stereoscopic-3D surfaces) is displayed at a time, but multiple images can be queued for presentation. An application renders to the image, and then queues the image for presentation to the surface.

A native window cannot be associated with more than one non-retired swapchain at a time. Further, swapchains cannot be created for native windows that have a non-Vulkan graphics API surface associated with them.

The presentation engine is an abstraction for the platform’s compositor or display engine.

The presentation engine may be synchronous or asynchronous with respect to the application and/or logical device.

Some implementations may use the device’s graphics queue or dedicated presentation hardware to perform presentation.

The presentable images of a swapchain are owned by the presentation engine. An application can acquire use of a presentable image from the presentation engine. Use of a presentable image must occur only after the image is returned by acquireNextImageKHR, and before it is released by queuePresentKHR. This includes transitioning the image layout and rendering commands.

An application can acquire use of a presentable image with acquireNextImageKHR. After acquiring a presentable image and before modifying it, the application must use a synchronization primitive to ensure that the presentation engine has finished reading from the image. The application can then transition the image’s layout, queue rendering commands to it, etc. Finally, the application presents the image with queuePresentKHR, which releases the acquisition of the image. The application can also release the acquisition of the image through releaseSwapchainImagesKHR, if the image is not in use by the device, and skip the present operation.

The presentation engine controls the order in which presentable images are acquired for use by the application.

This allows the platform to handle situations which require out-of-order return of images after presentation. At the same time, it allows the application to generate command buffers referencing all of the images in the swapchain at initialization time, rather than in its main loop.

See Also

VK_DEFINE_NON_DISPATCHABLE_HANDLE, VK_KHR_swapchain, AcquireNextImageInfoKHR, BindImageMemorySwapchainInfoKHR, ImageSwapchainCreateInfoKHR, PastPresentationTimingInfoEXT, PresentInfoKHR, ReleaseSwapchainImagesInfoKHR, SwapchainCalibratedTimestampInfoEXT, SwapchainCreateInfoKHR, acquireFullScreenExclusiveModeEXT, acquireNextImageKHR, createSharedSwapchainsKHR, createSwapchainKHR, destroySwapchainKHR, getLatencyTimingsNV, getPastPresentationTimingGOOGLE, getRefreshCycleDurationGOOGLE, getSwapchainCounterEXT, getSwapchainImagesKHR, getSwapchainStatusKHR, getSwapchainTimeDomainPropertiesEXT, getSwapchainTimingPropertiesEXT, latencySleepNV, queuePresentKHR, releaseFullScreenExclusiveModeEXT, setHdrMetadataEXT, setLatencyMarkerNV, setLatencySleepModeNV, setLocalDimmingAMD, setSwapchainPresentTimingQueueSizeEXT, waitForPresent2KHR, waitForPresentKHR

VkDeviceGroupPresentCapabilitiesKHR - Present capabilities from other physical devices

Description

modes always has DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR set.

The present mode flags are also used when presenting an image, in DeviceGroupPresentInfoKHR::mode.

If a device group only includes a single physical device, then modes must equal DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR.

Valid Usage (Implicit)

See Also

VK_KHR_device_group, VK_KHR_surface, VK_KHR_swapchain, VK_VERSION_1_1, DeviceGroupPresentModeFlagsKHR, StructureType, getDeviceGroupPresentCapabilitiesKHR

VkImageSwapchainCreateInfoKHR - Specify that an image will be bound to swapchain memory

Valid Usage

• If swapchain is not NULL_HANDLE, the fields of ImageCreateInfo must match the implied image creation parameters of the swapchain

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_IMAGE_SWAPCHAIN_CREATE_INFO_KHR

• If swapchain is not NULL_HANDLE, swapchain must be a valid SwapchainKHR handle

Structure Chaining

Extends the structure

• ImageCreateInfo

See Also

VK_KHR_device_group, VK_KHR_swapchain, VK_VERSION_1_1, StructureType, SwapchainKHR

VkBindImageMemorySwapchainInfoKHR - Structure specifying swapchain image memory to bind to

Description

If swapchain is not NULL, the swapchain and imageIndex are used to determine the memory that the image is bound to, instead of memory and memoryOffset.

Memory can be bound to a swapchain and use the pDeviceIndices or pSplitInstanceBindRegions members of BindImageMemoryDeviceGroupInfo.

Valid Usage

• imageIndex must be less than the number of images in swapchain

• If the swapchain has been created with SWAPCHAIN_CREATE_DEFERRED_MEMORY_ALLOCATION_BIT_KHR, imageIndex must be one that has previously been returned by acquireNextImageKHR or acquireNextImage2KHR

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_BIND_IMAGE_MEMORY_SWAPCHAIN_INFO_KHR

• swapchain must be a valid SwapchainKHR handle

Host Synchronization

• Host access to swapchain must be externally synchronized

Structure Chaining

Extends the structure

• BindImageMemoryInfo

See Also

VK_KHR_device_group, VK_KHR_swapchain, VK_VERSION_1_1, StructureType, SwapchainKHR

VkAcquireNextImageInfoKHR - Structure specifying parameters of the acquire

Description

If acquireNextImageKHR is used, the device mask is considered to include all physical devices in the logical device.

acquireNextImage2KHR signals at most one semaphore, even if the application requests waiting for multiple physical devices to be ready via the deviceMask. However, only a single physical device can wait on that semaphore, since the semaphore becomes unsignaled when the wait succeeds. For other physical devices to wait for the image to be ready, it is necessary for the application to submit semaphore signal operation(s) to that first physical device to signal additional semaphore(s) after the wait succeeds, which the other physical device(s) can wait upon.

Valid Usage

• swapchain must not be in the retired state

• If semaphore is not NULL_HANDLE, it must be unsignaled

• If semaphore is not NULL_HANDLE, it must not have any uncompleted signal or wait operations pending

• If fence is not NULL_HANDLE, fence must be unsignaled

• If fence is not NULL_HANDLE, fence must not be associated with any other queue command that has not yet completed execution on that queue

• semaphore and fence must not both be equal to NULL_HANDLE

• deviceMask must be a valid device mask

• deviceMask must not be zero

• semaphore must have a SemaphoreType of SEMAPHORE_TYPE_BINARY

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_ACQUIRE_NEXT_IMAGE_INFO_KHR

• pNext must be NULL

• swapchain must be a valid SwapchainKHR handle

• If semaphore is not NULL_HANDLE, semaphore must be a valid Semaphore handle

• If fence is not NULL_HANDLE, fence must be a valid Fence handle

• Each of fence, semaphore, and swapchain that are valid handles of non-ignored parameters must have been created, allocated, or retrieved from the same Device

Host Synchronization

• Host access to swapchain must be externally synchronized

• Host access to semaphore must be externally synchronized

• Host access to fence must be externally synchronized

See Also

VK_KHR_device_group, VK_KHR_swapchain, VK_VERSION_1_1, Fence, Semaphore, StructureType, SwapchainKHR, acquireNextImage2KHR

VkDeviceGroupPresentInfoKHR - Mode and mask controlling which physical devices' images are presented

Description

If mode is DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR, then each element of pDeviceMasks selects which instance of the swapchain image is presented. Each element of pDeviceMasks must have exactly one bit set, and the corresponding physical device must have a presentation engine as reported by DeviceGroupPresentCapabilitiesKHR.

If mode is DEVICE_GROUP_PRESENT_MODE_REMOTE_BIT_KHR, then each element of pDeviceMasks selects which instance of the swapchain image is presented. Each element of pDeviceMasks must have exactly one bit set, and some physical device in the logical device must include that bit in its DeviceGroupPresentCapabilitiesKHR::presentMask.

If mode is DEVICE_GROUP_PRESENT_MODE_SUM_BIT_KHR, then each element of pDeviceMasks selects which instances of the swapchain image are component-wise summed and the sum of those images is presented. If the sum in any component is outside the representable range, the value of that component is undefined. Each element of pDeviceMasks must have a value for which all set bits are set in one of the elements of DeviceGroupPresentCapabilitiesKHR::presentMask.

If mode is DEVICE_GROUP_PRESENT_MODE_LOCAL_MULTI_DEVICE_BIT_KHR, then each element of pDeviceMasks selects which instance(s) of the swapchain images are presented. For each bit set in each element of pDeviceMasks, the corresponding physical device must have a presentation engine as reported by DeviceGroupPresentCapabilitiesKHR.

If DeviceGroupPresentInfoKHR is not provided or swapchainCount is zero then the masks are considered to be 1. If DeviceGroupPresentInfoKHR is not provided, mode is considered to be DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR.

Valid Usage

• swapchainCount must equal 0 or PresentInfoKHR::swapchainCount

• If mode is DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR, then each element of pDeviceMasks must have exactly one bit set, and the corresponding element of DeviceGroupPresentCapabilitiesKHR::presentMask must be non-zero

• If mode is DEVICE_GROUP_PRESENT_MODE_REMOTE_BIT_KHR, then each element of pDeviceMasks must have exactly one bit set, and some physical device in the logical device must include that bit in its DeviceGroupPresentCapabilitiesKHR::presentMask

• If mode is DEVICE_GROUP_PRESENT_MODE_SUM_BIT_KHR, then each element of pDeviceMasks must have a value for which all set bits are set in one of the elements of DeviceGroupPresentCapabilitiesKHR::presentMask

• If mode is DEVICE_GROUP_PRESENT_MODE_LOCAL_MULTI_DEVICE_BIT_KHR, then for each bit set in each element of pDeviceMasks, the corresponding element of DeviceGroupPresentCapabilitiesKHR::presentMask must be non-zero

• The value of each element of pDeviceMasks must be equal to the device mask passed in AcquireNextImageInfoKHR::deviceMask when the image index was last acquired

• mode must have exactly one bit set, and that bit must have been included in DeviceGroupSwapchainCreateInfoKHR::modes

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_DEVICE_GROUP_PRESENT_INFO_KHR

• If swapchainCount is not 0, pDeviceMasks must be a valid pointer to an array of swapchainCount uint32_t values

• mode must be a valid DeviceGroupPresentModeFlagBitsKHR value

Structure Chaining

Extends the structure

• PresentInfoKHR

See Also

VK_KHR_device_group, VK_KHR_swapchain, VK_VERSION_1_1, DeviceGroupPresentModeFlagBitsKHR, StructureType

VkDeviceGroupSwapchainCreateInfoKHR - Structure specifying parameters of a newly created swapchain object

Description

If this structure is not present, modes is considered to be DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR.

Structure Chaining

Extends the structure

• SwapchainCreateInfoKHR

See Also

VK_KHR_device_group, VK_KHR_swapchain, VK_VERSION_1_1, DeviceGroupPresentModeFlagsKHR, StructureType

vkGetDeviceGroupPresentCapabilitiesKHR - Query present capabilities from other physical devices

Return Codes

Success

• SUCCESS

Failure

• ERROR_OUT_OF_DEVICE_MEMORY

• ERROR_OUT_OF_HOST_MEMORY

• ERROR_UNKNOWN

• ERROR_VALIDATION_FAILED

See Also

VK_KHR_device_group, VK_KHR_surface, VK_KHR_swapchain, VK_VERSION_1_1, Device, DeviceGroupPresentCapabilitiesKHR

vkGetDeviceGroupSurfacePresentModesKHR - Query present capabilities for a surface

Description

The modes returned by this command are not invariant, and may change in response to the surface being moved, resized, or occluded. These modes must be a subset of the modes returned by getDeviceGroupPresentCapabilitiesKHR.

Valid Usage

• surface must be supported by all physical devices associated with device, as reported by getPhysicalDeviceSurfaceSupportKHR or an equivalent platform-specific mechanism

Valid Usage (Implicit)

• device must be a valid Device handle

• surface must be a valid SurfaceKHR handle

• pModes must be a valid pointer to a DeviceGroupPresentModeFlagsKHR value

• Both of device, and surface must have been created, allocated, or retrieved from the same Instance

Host Synchronization

• Host access to surface must be externally synchronized

Return Codes

Success

• SUCCESS

Failure

• ERROR_OUT_OF_DEVICE_MEMORY

• ERROR_OUT_OF_HOST_MEMORY

• ERROR_SURFACE_LOST_KHR

• ERROR_UNKNOWN

• ERROR_VALIDATION_FAILED

See Also

VK_KHR_device_group, VK_KHR_surface, VK_KHR_swapchain, VK_VERSION_1_1, Device, DeviceGroupPresentModeFlagsKHR, SurfaceKHR

vkAcquireNextImage2KHR - Retrieve the index of the next available presentable image

Description

If the swapchain has been created with the SWAPCHAIN_CREATE_DEFERRED_MEMORY_ALLOCATION_BIT_KHR flag, the image whose index is returned in pImageIndex will be fully backed by memory before this call returns to the application.

Valid Usage

• If forward progress cannot be guaranteed for the surface used to create swapchain, the timeout member of pAcquireInfo must not be UINT64_MAX

Valid Usage (Implicit)

• device must be a valid Device handle

• pAcquireInfo must be a valid pointer to a valid AcquireNextImageInfoKHR structure

• pImageIndex must be a valid pointer to a uint32_t value

Return Codes

Success

• NOT_READY

• SUBOPTIMAL_KHR

• SUCCESS

• TIMEOUT

Failure

• ERROR_DEVICE_LOST

• ERROR_FULL_SCREEN_EXCLUSIVE_MODE_LOST_EXT

• ERROR_OUT_OF_DATE_KHR

• ERROR_OUT_OF_DEVICE_MEMORY

• ERROR_OUT_OF_HOST_MEMORY

• ERROR_SURFACE_LOST_KHR

• ERROR_UNKNOWN

• ERROR_VALIDATION_FAILED

See Also

VK_KHR_device_group, VK_KHR_swapchain, VK_VERSION_1_1, AcquireNextImageInfoKHR, Device

A variant of acquireNextImage2KHR which makes a *safe* FFI call

vkGetPhysicalDevicePresentRectanglesKHR - Query present rectangles for a surface on a physical device

Description

If pRects is NULL, then the number of rectangles used when presenting the given surface is returned in pRectCount. Otherwise, pRectCount must point to a variable set by the application to the number of elements in the pRects array, and on return the variable is overwritten with the number of structures actually written to pRects. If the value of pRectCount is less than the number of rectangles, at most pRectCount structures will be written, and INCOMPLETE will be returned instead of SUCCESS, to indicate that not all the available rectangles were returned.

The values returned by this command are not invariant, and may change in response to the surface being moved, resized, or occluded.

The rectangles returned by this command must not overlap.

Valid Usage

• surface must be supported by physicalDevice, as reported by getPhysicalDeviceSurfaceSupportKHR or an equivalent platform-specific mechanism

Valid Usage (Implicit)

• physicalDevice must be a valid PhysicalDevice handle

• surface must be a valid SurfaceKHR handle

• pRectCount must be a valid pointer to a uint32_t value

• If the value referenced by pRectCount is not 0, and pRects is not NULL, pRects must be a valid pointer to an array of pRectCount Rect2D structures

• Both of physicalDevice, and surface must have been created, allocated, or retrieved from the same Instance

Host Synchronization

• Host access to surface must be externally synchronized

Return Codes

Success

• INCOMPLETE

• SUCCESS

Failure

• ERROR_OUT_OF_DEVICE_MEMORY

• ERROR_OUT_OF_HOST_MEMORY

• ERROR_UNKNOWN

• ERROR_VALIDATION_FAILED

See Also

VK_KHR_device_group, VK_KHR_surface, VK_KHR_swapchain, VK_VERSION_1_1, PhysicalDevice, Rect2D, SurfaceKHR

VkDeviceGroupPresentModeFlagBitsKHR - Bitmask specifying supported device group present modes

Description

• DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR specifies that any physical device with a presentation engine can present its own swapchain images.

• DEVICE_GROUP_PRESENT_MODE_REMOTE_BIT_KHR specifies that any physical device with a presentation engine can present swapchain images from any physical device in its presentMask.

• DEVICE_GROUP_PRESENT_MODE_SUM_BIT_KHR specifies that any physical device with a presentation engine can present the sum of swapchain images from any physical devices in its presentMask.

• DEVICE_GROUP_PRESENT_MODE_LOCAL_MULTI_DEVICE_BIT_KHR specifies that multiple physical devices with a presentation engine can each present their own swapchain images.

See Also

VK_KHR_device_group, VK_KHR_surface, VK_KHR_swapchain, VK_VERSION_1_1, DeviceGroupPresentInfoKHR, DeviceGroupPresentModeFlagsKHR

VkSwapchainCreateFlagBitsKHR - Bitmask controlling swapchain creation

Description

• SWAPCHAIN_CREATE_SPLIT_INSTANCE_BIND_REGIONS_BIT_KHR specifies that images created from the swapchain (i.e. with the swapchain member of ImageSwapchainCreateInfoKHR set to this swapchain’s handle) must use IMAGE_CREATE_SPLIT_INSTANCE_BIND_REGIONS_BIT.

• SWAPCHAIN_CREATE_PROTECTED_BIT_KHR specifies that images created from the swapchain are protected images.

• SWAPCHAIN_CREATE_MUTABLE_FORMAT_BIT_KHR specifies that the images of the swapchain can be used to create a ImageView with a different format than what the swapchain was created with. The list of allowed image view formats is specified by adding a ImageFormatListCreateInfo structure to the pNext chain of SwapchainCreateInfoKHR. In addition, this flag also specifies that the swapchain can be created with usage flags that are not supported for the format the swapchain is created with but are supported for at least one of the allowed image view formats.

• SWAPCHAIN_CREATE_DEFERRED_MEMORY_ALLOCATION_BIT_KHR specifies that the implementation may defer allocation of memory associated with each swapchain image until its index is to be returned from acquireNextImageKHR or acquireNextImage2KHR for the first time.

• SWAPCHAIN_CREATE_PRESENT_ID_2_BIT_KHR specifies that applications can include the PresentId2KHR structure in the pNext chain of the PresentInfoKHR structure to associate an identifier with each presentation request.

• SWAPCHAIN_CREATE_PRESENT_WAIT_2_BIT_KHR specifies that applications can use waitForPresent2KHR to wait for the presentation engine to have begun presentation of the presentation request associated with PresentWait2InfoKHR::presentId on swapchain.

• SWAPCHAIN_CREATE_PRESENT_TIMING_BIT_EXT specifies that features supported by the swapchain device in PhysicalDevicePresentTimingFeaturesEXT can be used to collect timing information or schedule presentation requests at specific times.

See Also

VK_KHR_swapchain, SwapchainCreateFlagsKHR