vkSetLocalDimmingAMD - Set Local Dimming

Parameters

• device is the device associated with swapChain.

• swapChain handle to enable local dimming.
• localDimmingEnable specifies whether local dimming is enabled for the swapchain.

Valid Usage (Implicit)

• device must be a valid Device handle

• swapChain must be a valid SwapchainKHR handle
• Both of device, and swapChain must have been created, allocated, or retrieved from the same Instance

Valid Usage

• It is only valid to call setLocalDimmingAMD if DisplayNativeHdrSurfaceCapabilitiesAMD::localDimmingSupport is supported.

See Also

Bool32, Device, SwapchainKHR

VkDisplayNativeHdrSurfaceCapabilitiesAMD - Structure describing display native HDR specific capabilities of a surface

Valid Usage (Implicit)

See Also

Bool32, StructureType

VkSwapchainDisplayNativeHdrCreateInfoAMD - Structure specifying display native HDR parameters of a newly created swapchain object

Description

If the pNext chain of SwapchainCreateInfoKHR does not include this structure, the default value for localDimmingEnable is TRUE, meaning local dimming is initially enabled for the swapchain.

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_SWAPCHAIN_DISPLAY_NATIVE_HDR_CREATE_INFO_AMD

Valid Usage

• It is only valid to set localDimmingEnable to TRUE if DisplayNativeHdrSurfaceCapabilitiesAMD::localDimmingSupport is supported.

See Also

Bool32, StructureType

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.

Note

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

Note

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

AcquireNextImageInfoKHR, BindImageMemorySwapchainInfoKHR, ImageSwapchainCreateInfoKHR, PresentInfoKHR, SwapchainCreateInfoKHR, acquireFullScreenExclusiveModeEXT, acquireNextImageKHR, createSharedSwapchainsKHR, createSwapchainKHR, destroySwapchainKHR, getPastPresentationTimingGOOGLE, getRefreshCycleDurationGOOGLE, getSwapchainCounterEXT, getSwapchainImagesKHR, getSwapchainStatusKHR, releaseFullScreenExclusiveModeEXT, setHdrMetadataEXT, setLocalDimmingAMD

VkColorSpaceKHR - supported color space of the presentation engine

Description

Note

In the initial release of the VK_KHR_surface and https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_KHR_swapchain extensions, the token VK_COLORSPACE_SRGB_NONLINEAR_KHR was used. Starting in the 2016-05-13 updates to the extension branches, matching release 1.0.13 of the core API specification, COLOR_SPACE_SRGB_NONLINEAR_KHR is used instead for consistency with Vulkan naming rules. The older enum is still available for backwards compatibility.

Note

In older versions of this extension COLOR_SPACE_DISPLAY_P3_LINEAR_EXT was misnamed COLOR_SPACE_DCI_P3_LINEAR_EXT. This has been updated to indicate that it uses RGB color encoding, not XYZ. The old name is deprecated but is maintained for backwards compatibility.

The color components of non-linear color space swap chain images must have had the appropriate transfer function applied. The color space selected for the swap chain image will not affect the processing of data written into the image by the implementation. Vulkan requires that all implementations support the sRGB transfer function by use of an SRGB pixel format. Other transfer functions, such as SMPTE 170M or SMPTE2084, can be performed by the application shader. This extension defines enums for ColorSpaceKHR that correspond to the following color spaces:

Color Spaces and Attributes

The transfer functions are described in the “Transfer Functions” chapter of the Khronos Data Format Specification.

Except Display-P3 OETF, which is:

[begin{aligned} E & = begin{cases} 1.055 times L^{1 over 2.4} - 0.055 & text{for} 0.0030186 leq L leq 1 -- 12.92 times L & text{for} 0 leq L < 0.0030186