// Copyright 2014-2021 The Khronos Group, Inc.
//
// SPDX-License-Identifier: CC-BY-4.0

[[wsi]]
= Window System Integration (WSI)

This chapter discusses the window system integration (WSI) between the
Vulkan API and the various forms of displaying the results of rendering to a
user.
Since the Vulkan API can: be used without displaying results, WSI is
provided through the use of optional Vulkan extensions.
This chapter provides an overview of WSI.
See the appendix for additional details of each WSI extension, including
which extensions must: be enabled in order to use each of the functions
described in this chapter.


== WSI Platform

A platform is an abstraction for a window system, OS, etc.
Some examples include MS Windows, Android, and Wayland.
The Vulkan API may: be integrated in a unique manner for each platform.

The Vulkan API does not define any type of platform object.
Platform-specific WSI extensions are defined, each containing
platform-specific functions for using WSI.
Use of these extensions is guarded by preprocessor symbols as defined in the
<<boilerplate-wsi-header,Window System-Specific Header Control>> appendix.

In order for an application to be compiled to use WSI with a given platform,
it must either:

  * `#define` the appropriate preprocessor symbol prior to including the
    `{full_header}` header file, or
  * include `{core_header}` and any native platform headers, followed by the
    appropriate platform-specific header.

The preprocessor symbols and platform-specific headers are defined in the
<<boilerplate-wsi-header-table, Window System Extensions and Headers>>
table.

Each platform-specific extension is an instance extension.
The application must: enable instance extensions with fname:vkCreateInstance
before using them.


== WSI Surface

[open,refpage='VkSurfaceKHR',desc='Opaque handle to a surface object',type='handles']
--
Native platform surface or window objects are abstracted by surface objects,
which are represented by sname:VkSurfaceKHR handles:

include::{generated}/api/handles/VkSurfaceKHR.txt[]

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

ifdef::implementation-guide[]
[NOTE]
.Note
====
On certain platforms, the Vulkan loader and ICDs may: have conventions that
treat the handle as a pointer to a structure containing the
platform-specific information about the surface.
This will be described in the documentation for the loader-ICD interface,
and in the `vk_icd.h` header file of the LoaderAndTools source-code
repository.
This does not affect the loader-layer interface; layers may: wrap
sname:VkSurfaceKHR objects.
====
endif::implementation-guide[]
--

ifdef::editing-notes[]
[NOTE]
.editing-note
====
TODO: Consider replacing the above note editing note with a pointer to the
loader specification, when it exists.
However, the information is not relevant to users of the API nor does it
affect conformance of a Vulkan implementation.
====
endif::editing-notes[]

ifdef::VK_KHR_android_surface[]
include::{chapters}/VK_KHR_android_surface/platformCreateSurface_android.txt[]
endif::VK_KHR_android_surface[]

ifdef::VK_KHR_wayland_surface[]
include::{chapters}/VK_KHR_wayland_surface/platformCreateSurface_wayland.txt[]
endif::VK_KHR_wayland_surface[]

ifdef::VK_KHR_win32_surface[]
include::{chapters}/VK_KHR_win32_surface/platformCreateSurface_win32.txt[]
endif::VK_KHR_win32_surface[]

ifdef::VK_KHR_xcb_surface[]
include::{chapters}/VK_KHR_xcb_surface/platformCreateSurface_xcb.txt[]
endif::VK_KHR_xcb_surface[]

ifdef::VK_KHR_xlib_surface[]
include::{chapters}/VK_KHR_xlib_surface/platformCreateSurface_xlib.txt[]
endif::VK_KHR_xlib_surface[]

ifdef::VK_EXT_directfb_surface[]
include::{chapters}/VK_EXT_directfb_surface/platformCreateSurface_directfb.txt[]
endif::VK_EXT_directfb_surface[]

ifdef::VK_FUCHSIA_imagepipe_surface[]
include::{chapters}/VK_FUCHSIA_imagepipe_surface/platformCreateSurface_imagepipe.txt[]
endif::VK_FUCHSIA_imagepipe_surface[]

ifdef::VK_GGP_stream_descriptor_surface[]
include::{chapters}/VK_GGP_stream_descriptor_surface/platformCreateSurface_streamdescriptor.txt[]
endif::VK_GGP_stream_descriptor_surface[]

ifdef::VK_MVK_ios_surface[]
include::{chapters}/VK_MVK_ios_surface/platformCreateSurface_ios.txt[]
endif::VK_MVK_ios_surface[]

ifdef::VK_MVK_macos_surface[]
include::{chapters}/VK_MVK_macos_surface/platformCreateSurface_macos.txt[]
endif::VK_MVK_macos_surface[]

ifdef::VK_NN_vi_surface[]
include::{chapters}/VK_NN_vi_surface/platformCreateSurface_vi.txt[]
endif::VK_NN_vi_surface[]

ifdef::VK_EXT_metal_surface[]
include::{chapters}/VK_EXT_metal_surface/platformCreateSurface_metal.txt[]
endif::VK_EXT_metal_surface[]

ifdef::VK_QNX_screen_surface[]
include::{chapters}/VK_QNX_screen_surface/platformCreateSurface_screen.txt[]
endif::VK_QNX_screen_surface[]

=== Platform-Independent Information

Once created, sname:VkSurfaceKHR objects can: be used in this and other
extensions, in particular the `<<VK_KHR_swapchain>>` extension.

Several WSI functions return ename:VK_ERROR_SURFACE_LOST_KHR if the surface
becomes no longer available.
After such an error, the surface (and any child swapchain, if one exists)
should: be destroyed, as there is no way to restore them to a not-lost
state.
Applications may: attempt to create a new sname:VkSurfaceKHR using the same
native platform window object, but whether such re-creation will succeed is
platform-dependent and may: depend on the reason the surface became
unavailable.
A lost surface does not otherwise cause devices to be
<<devsandqueues-lost-device,lost>>.

[open,refpage='vkDestroySurfaceKHR',desc='Destroy a VkSurfaceKHR object',type='protos']
--
To destroy a sname:VkSurfaceKHR object, call:

include::{generated}/api/protos/vkDestroySurfaceKHR.txt[]

  * pname:instance is the instance used to create the surface.
  * pname:surface is the surface to destroy.
  * pname:pAllocator is the allocator used for host memory allocated for the
    surface object when there is no more specific allocator available (see
    <<memory-allocation,Memory Allocation>>).

Destroying a sname:VkSurfaceKHR merely severs the connection between Vulkan
and the native surface, and does not imply destroying the native surface,
closing a window, or similar behavior.

.Valid Usage
****
  * [[VUID-vkDestroySurfaceKHR-surface-01266]]
    All sname:VkSwapchainKHR objects created for pname:surface must: have
    been destroyed prior to destroying pname:surface
  * [[VUID-vkDestroySurfaceKHR-surface-01267]]
    If sname:VkAllocationCallbacks were provided when pname:surface was
    created, a compatible set of callbacks must: be provided here
  * [[VUID-vkDestroySurfaceKHR-surface-01268]]
    If no sname:VkAllocationCallbacks were provided when pname:surface was
    created, pname:pAllocator must: be `NULL`
****

include::{generated}/validity/protos/vkDestroySurfaceKHR.txt[]
--

ifdef::VK_KHR_display[]
include::{chapters}/VK_KHR_display/display.txt[]
endif::VK_KHR_display[]

ifdef::VK_EXT_headless_surface[]
include::{chapters}/VK_EXT_headless_surface/headless.txt[]
endif::VK_EXT_headless_surface[]


== Querying for WSI Support

Not all physical devices will include WSI support.
Within a physical device, not all queue families will support presentation.
WSI support and compatibility can: be determined in a platform-neutral
manner (which determines support for presentation to a particular surface
object) and additionally may: be determined in platform-specific manners
(which determine support for presentation on the specified physical device
but do not guarantee support for presentation to a particular surface
object).

[open,refpage='vkGetPhysicalDeviceSurfaceSupportKHR',desc='Query if presentation is supported',type='protos']
--
To determine whether a queue family of a physical device supports
presentation to a given surface, call:

include::{generated}/api/protos/vkGetPhysicalDeviceSurfaceSupportKHR.txt[]

  * pname:physicalDevice is the physical device.
  * pname:queueFamilyIndex is the queue family.
  * pname:surface is the surface.
  * pname:pSupported is a pointer to a basetype:VkBool32, which is set to
    ename:VK_TRUE to indicate support, and ename:VK_FALSE otherwise.

.Valid Usage
****
  * [[VUID-vkGetPhysicalDeviceSurfaceSupportKHR-queueFamilyIndex-01269]]
    pname:queueFamilyIndex must: be less than
    pname:pQueueFamilyPropertyCount returned by
    fname:vkGetPhysicalDeviceQueueFamilyProperties for the given
    pname:physicalDevice
****

include::{generated}/validity/protos/vkGetPhysicalDeviceSurfaceSupportKHR.txt[]
--

ifdef::VK_KHR_android_surface[]
include::{chapters}/VK_KHR_android_surface/platformQuerySupport_android.txt[]
endif::VK_KHR_android_surface[]

ifdef::VK_KHR_wayland_surface[]
include::{chapters}/VK_KHR_wayland_surface/platformQuerySupport_wayland.txt[]
endif::VK_KHR_wayland_surface[]

ifdef::VK_KHR_win32_surface[]
include::{chapters}/VK_KHR_win32_surface/platformQuerySupport_win32.txt[]
endif::VK_KHR_win32_surface[]

ifdef::VK_KHR_xcb_surface[]
include::{chapters}/VK_KHR_xcb_surface/platformQuerySupport_xcb.txt[]
endif::VK_KHR_xcb_surface[]

ifdef::VK_KHR_xlib_surface[]
include::{chapters}/VK_KHR_xlib_surface/platformQuerySupport_xlib.txt[]
endif::VK_KHR_xlib_surface[]

ifdef::VK_EXT_directfb_surface[]
include::{chapters}/VK_EXT_directfb_surface/platformQuerySupport_directfb.txt[]
endif::VK_EXT_directfb_surface[]

ifdef::VK_FUCHSIA_imagepipe_surface[]
include::{chapters}/VK_FUCHSIA_imagepipe_surface/platformQuerySupport_imagepipe.txt[]
endif::VK_FUCHSIA_imagepipe_surface[]

ifdef::VK_GGP_stream_descriptor_surface[]
include::{chapters}/VK_GGP_stream_descriptor_surface/platformQuerySupport_streamdescriptor.txt[]
endif::VK_GGP_stream_descriptor_surface[]

ifdef::VK_MVK_ios_surface[]
include::{chapters}/VK_MVK_ios_surface/platformQuerySupport_ios.txt[]
endif::VK_MVK_ios_surface[]

ifdef::VK_MVK_macos_surface[]
include::{chapters}/VK_MVK_macos_surface/platformQuerySupport_macos.txt[]
endif::VK_MVK_macos_surface[]

ifdef::VK_NN_vi_surface[]
include::{chapters}/VK_NN_vi_surface/platformQuerySupport_vi.txt[]
endif::VK_NN_vi_surface[]

ifdef::VK_QNX_screen_surface[]
include::{chapters}/VK_QNX_screen_surface/platformQuerySupport_screen.txt[]
endif::VK_QNX_screen_surface[]

== Surface Queries

The capabilities of a swapchain targeting a surface are the intersection of
the capabilities of the WSI platform, the native window or display, and the
physical device.
The resulting capabilities can: be obtained with the queries listed below in
this section.

[NOTE]
.Note
====
In addition to the surface capabilities as obtained by surface queries
below, swapchain images are also subject to ordinary image creation limits
as reported by flink:vkGetPhysicalDeviceImageFormatProperties.
As an application is instructed by the appropriate Valid Usage sections,
both the surface capabilities and the image creation limits have to be
satisfied whenever swapchain images are created.
====


=== Surface Capabilities

[open,refpage='vkGetPhysicalDeviceSurfaceCapabilitiesKHR',desc='Query surface capabilities',type='protos']
--
To query the basic capabilities of a surface, needed in order to create a
swapchain, call:

include::{generated}/api/protos/vkGetPhysicalDeviceSurfaceCapabilitiesKHR.txt[]

  * pname:physicalDevice is the physical device that will be associated with
    the swapchain to be created, as described for
    flink:vkCreateSwapchainKHR.
  * pname:surface is the surface that will be associated with the swapchain.
  * pname:pSurfaceCapabilities is a pointer to a
    slink:VkSurfaceCapabilitiesKHR structure in which the capabilities are
    returned.

.Valid Usage
****
include::{chapters}/commonvalidity/surface_physical_device_common.txt[]
****

include::{generated}/validity/protos/vkGetPhysicalDeviceSurfaceCapabilitiesKHR.txt[]
--

[open,refpage='VkSurfaceCapabilitiesKHR',desc='Structure describing capabilities of a surface',type='structs']
--
The sname:VkSurfaceCapabilitiesKHR structure is defined as:

include::{generated}/api/structs/VkSurfaceCapabilitiesKHR.txt[]

// These members are defined identically in VkSurfaceCapabilities2EXT, an
// extendable structure version of this query, so they are just reused from
// here.

// tag::surface_capabilities_members[]
  * pname:minImageCount is the minimum number of images the specified device
    supports for a swapchain created for the surface, and will be at least
    one.
  * pname:maxImageCount is the maximum number of images the specified device
    supports for a swapchain created for the surface, and will be either 0,
    or greater than or equal to pname:minImageCount.
    A value of 0 means that there is no limit on the number of images,
    though there may: be limits related to the total amount of memory used
    by presentable images.
  * pname:currentExtent is the current width and height of the surface, or
    the special value [eq]#(0xFFFFFFFF, 0xFFFFFFFF)# indicating that the
    surface size will be determined by the extent of a swapchain targeting
    the surface.
  * pname:minImageExtent contains the smallest valid swapchain extent for
    the surface on the specified device.
    The pname:width and pname:height of the extent will each be less than or
    equal to the corresponding pname:width and pname:height of
    pname:currentExtent, unless pname:currentExtent has the special value
    described above.
  * pname:maxImageExtent contains the largest valid swapchain extent for the
    surface on the specified device.
    The pname:width and pname:height of the extent will each be greater than
    or equal to the corresponding pname:width and pname:height of
    pname:minImageExtent.
    The pname:width and pname:height of the extent will each be greater than
    or equal to the corresponding pname:width and pname:height of
    pname:currentExtent, unless pname:currentExtent has the special value
    described above.
  * pname:maxImageArrayLayers is the maximum number of layers presentable
    images can: have for a swapchain created for this device and surface,
    and will be at least one.
  * pname:supportedTransforms is a bitmask of
    elink:VkSurfaceTransformFlagBitsKHR indicating the presentation
    transforms supported for the surface on the specified device.
    At least one bit will be set.
  * pname:currentTransform is elink:VkSurfaceTransformFlagBitsKHR value
    indicating the surface's current transform relative to the presentation
    engine's natural orientation.
  * pname:supportedCompositeAlpha is a bitmask of
    elink:VkCompositeAlphaFlagBitsKHR, representing the alpha compositing
    modes supported by the presentation engine for the surface on the
    specified device, and at least one bit will be set.
    Opaque composition can: be achieved in any alpha compositing mode by
    either using an image format that has no alpha component, or by ensuring
    that all pixels in the presentable images have an alpha value of 1.0.
  * pname:supportedUsageFlags is a bitmask of elink:VkImageUsageFlagBits
    representing the ways the application can: use the presentable images of
    a swapchain created
ifdef::VK_KHR_shared_presentable_image[]
    with elink:VkPresentModeKHR set to ename:VK_PRESENT_MODE_IMMEDIATE_KHR,
    ename:VK_PRESENT_MODE_MAILBOX_KHR, ename:VK_PRESENT_MODE_FIFO_KHR or
    ename:VK_PRESENT_MODE_FIFO_RELAXED_KHR
endif::VK_KHR_shared_presentable_image[]
    for the surface on the specified device.
    ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT must: be included in the set.
    Implementations may: support additional usages.
// end::surface_capabilities_members[]

ifdef::VK_KHR_shared_presentable_image[]
[NOTE]
.Note
====
Supported usage flags of a presentable image when using
ename:VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR or
ename:VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR presentation mode are
provided by
slink:VkSharedPresentSurfaceCapabilitiesKHR::pname:sharedPresentSupportedUsageFlags.
====
endif::VK_KHR_shared_presentable_image[]

[NOTE]
.Note
====
Formulas such as [eq]#min(N, pname:maxImageCount)# are not correct, since
pname:maxImageCount may: be zero.
====

include::{generated}/validity/structs/VkSurfaceCapabilitiesKHR.txt[]
--

ifdef::VK_KHR_get_surface_capabilities2[]
[open,refpage='vkGetPhysicalDeviceSurfaceCapabilities2KHR',desc='Reports capabilities of a surface on a physical device',type='protos']
--
To query the basic capabilities of a surface defined by the core or
extensions, call:

include::{generated}/api/protos/vkGetPhysicalDeviceSurfaceCapabilities2KHR.txt[]

  * pname:physicalDevice is the physical device that will be associated with
    the swapchain to be created, as described for
    flink:vkCreateSwapchainKHR.
  * pname:pSurfaceInfo is a pointer to a
    slink:VkPhysicalDeviceSurfaceInfo2KHR structure describing the surface
    and other fixed parameters that would be consumed by
    flink:vkCreateSwapchainKHR.
  * pname:pSurfaceCapabilities is a pointer to a
    slink:VkSurfaceCapabilities2KHR structure in which the capabilities are
    returned.

fname:vkGetPhysicalDeviceSurfaceCapabilities2KHR behaves similarly to
flink:vkGetPhysicalDeviceSurfaceCapabilitiesKHR, with the ability to specify
extended inputs via chained input structures, and to return extended
information via chained output structures.

ifdef::VK_EXT_full_screen_exclusive+VK_KHR_win32_surface[]
.Valid Usage
****
include::{chapters}/commonvalidity/surface_info_physical_device_common.txt[]
  * [[VUID-vkGetPhysicalDeviceSurfaceCapabilities2KHR-pNext-02671]]
    If a slink:VkSurfaceCapabilitiesFullScreenExclusiveEXT structure is
    included in the pname:pNext chain of pname:pSurfaceCapabilities, a
    slink:VkSurfaceFullScreenExclusiveWin32InfoEXT structure must: be
    included in the pname:pNext chain of pname:pSurfaceInfo
****
endif::VK_EXT_full_screen_exclusive+VK_KHR_win32_surface[]

include::{generated}/validity/protos/vkGetPhysicalDeviceSurfaceCapabilities2KHR.txt[]
--

[open,refpage='VkPhysicalDeviceSurfaceInfo2KHR',desc='Structure specifying a surface and related swapchain creation parameters',type='structs']
--
The sname:VkPhysicalDeviceSurfaceInfo2KHR structure is defined as:

include::{generated}/api/structs/VkPhysicalDeviceSurfaceInfo2KHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:surface is the surface that will be associated with the swapchain.

The members of sname:VkPhysicalDeviceSurfaceInfo2KHR correspond to the
arguments to flink:vkGetPhysicalDeviceSurfaceCapabilitiesKHR, with
pname:sType and pname:pNext added for extensibility.

ifdef::VK_EXT_full_screen_exclusive[]
Additional capabilities of a surface may: be available to swapchains created
with different full-screen exclusive settings - particularly if exclusive
full-screen access is application controlled.
These additional capabilities can: be queried by adding a
slink:VkSurfaceFullScreenExclusiveInfoEXT structure to the pname:pNext chain
of this structure when used to query surface properties.
ifdef::VK_KHR_win32_surface[]
Additionally, for Win32 surfaces with application controlled exclusive
full-screen access, chaining a
slink:VkSurfaceFullScreenExclusiveWin32InfoEXT structure may: also report
additional surface capabilities.
endif::VK_KHR_win32_surface[]
These additional capabilities only apply to swapchains created with the same
parameters included in the pname:pNext chain of
slink:VkSwapchainCreateInfoKHR.
endif::VK_EXT_full_screen_exclusive[]

ifdef::VK_KHR_win32_surface+VK_EXT_full_screen_exclusive[]
.Valid Usage
****
  * [[VUID-VkPhysicalDeviceSurfaceInfo2KHR-pNext-02672]]
    If the pname:pNext chain includes a
    slink:VkSurfaceFullScreenExclusiveInfoEXT structure with its
    pname:fullScreenExclusive member set to
    ename:VK_FULL_SCREEN_EXCLUSIVE_APPLICATION_CONTROLLED_EXT, and
    pname:surface was created using flink:vkCreateWin32SurfaceKHR, a
    slink:VkSurfaceFullScreenExclusiveWin32InfoEXT structure must: be
    included in the pname:pNext chain
****
endif::VK_KHR_win32_surface+VK_EXT_full_screen_exclusive[]

include::{generated}/validity/structs/VkPhysicalDeviceSurfaceInfo2KHR.txt[]
--

ifdef::VK_EXT_full_screen_exclusive[]
[open,refpage='VkSurfaceFullScreenExclusiveInfoEXT',desc='Structure specifying the preferred full-screen transition behavior',type='structs']
--
If the pname:pNext chain of slink:VkSwapchainCreateInfoKHR includes a
sname:VkSurfaceFullScreenExclusiveInfoEXT structure, then that structure
specifies the application's preferred full-screen transition behavior.

The sname:VkSurfaceFullScreenExclusiveInfoEXT structure is defined as:

include::{generated}/api/structs/VkSurfaceFullScreenExclusiveInfoEXT.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:fullScreenExclusive is a elink:VkFullScreenExclusiveEXT value
    specifying the preferred full-screen transition behavior.

If this structure is not present, pname:fullScreenExclusive is considered to
be ename:VK_FULL_SCREEN_EXCLUSIVE_DEFAULT_EXT.

include::{generated}/validity/structs/VkSurfaceFullScreenExclusiveInfoEXT.txt[]
--

[open,refpage='VkFullScreenExclusiveEXT',desc='Hint values an application can specify affecting full-screen transition behavior',type='enums']
--
Possible values of
sname:VkSurfaceFullScreenExclusiveInfoEXT::pname:fullScreenExclusive are:

include::{generated}/api/enums/VkFullScreenExclusiveEXT.txt[]

  * ename:VK_FULL_SCREEN_EXCLUSIVE_DEFAULT_EXT indicates the implementation
    should: determine the appropriate full-screen method by whatever means
    it deems appropriate.
  * ename:VK_FULL_SCREEN_EXCLUSIVE_ALLOWED_EXT indicates the implementation
    may: use full-screen exclusive mechanisms when available.
    Such mechanisms may: result in better performance and/or the
    availability of different presentation capabilities, but may: require a
    more disruptive transition during swapchain initialization, first
    presentation and/or destruction.
  * ename:VK_FULL_SCREEN_EXCLUSIVE_DISALLOWED_EXT indicates the
    implementation should: avoid using full-screen mechanisms which rely on
    disruptive transitions.
  * ename:VK_FULL_SCREEN_EXCLUSIVE_APPLICATION_CONTROLLED_EXT indicates the
    application will manage full-screen exclusive mode by using the
    flink:vkAcquireFullScreenExclusiveModeEXT and
    flink:vkReleaseFullScreenExclusiveModeEXT commands.
--

ifdef::VK_KHR_win32_surface[]
[open,refpage='VkSurfaceFullScreenExclusiveWin32InfoEXT',desc='Structure specifying additional creation parameters specific to Win32 fullscreen exclusive mode',type='structs']
--
The sname:VkSurfaceFullScreenExclusiveWin32InfoEXT structure is defined as:

include::{generated}/api/structs/VkSurfaceFullScreenExclusiveWin32InfoEXT.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:hmonitor is the Win32 code:HMONITOR handle identifying the display
    to create the surface with.

[NOTE]
.Note
====
If pname:hmonitor is invalidated (e.g. the monitor is unplugged) during the
lifetime of a swapchain created with this structure, operations on that
swapchain will return ename:VK_ERROR_OUT_OF_DATE_KHR.
====

[NOTE]
.Note
====
It is the responsibility of the application to change the display settings
of the targeted Win32 display using the appropriate platform APIs.
Such changes may: alter the surface capabilities reported for the created
surface.
====

.Valid Usage
****
  * [[VUID-VkSurfaceFullScreenExclusiveWin32InfoEXT-hmonitor-02673]]
    pname:hmonitor must: be a valid code:HMONITOR
****

include::{generated}/validity/structs/VkSurfaceFullScreenExclusiveWin32InfoEXT.txt[]
--
endif::VK_KHR_win32_surface[]
endif::VK_EXT_full_screen_exclusive[]

[open,refpage='VkSurfaceCapabilities2KHR',desc='Structure describing capabilities of a surface',type='structs']
--
The sname:VkSurfaceCapabilities2KHR structure is defined as:

include::{generated}/api/structs/VkSurfaceCapabilities2KHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:surfaceCapabilities is a slink:VkSurfaceCapabilitiesKHR structure
    describing the capabilities of the specified surface.

include::{generated}/validity/structs/VkSurfaceCapabilities2KHR.txt[]
--

ifdef::VK_KHR_surface_protected_capabilities[]
[open,refpage='VkSurfaceProtectedCapabilitiesKHR',desc='Structure describing capability of a surface to be protected',type='structs']
--
An application queries if a protected slink:VkSurfaceKHR is displayable on a
specific windowing system using sname:VkSurfaceProtectedCapabilitiesKHR,
which can: be passed in pname:pNext parameter of
sname:VkSurfaceCapabilities2KHR.

The sname:VkSurfaceProtectedCapabilitiesKHR structure is defined as:

include::{generated}/api/structs/VkSurfaceProtectedCapabilitiesKHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:supportsProtected specifies whether a protected swapchain created
    from slink:VkPhysicalDeviceSurfaceInfo2KHR::pname:surface for a
    particular windowing system can: be displayed on screen or not.
    If pname:supportsProtected is ename:VK_TRUE, then creation of swapchains
    with the ename:VK_SWAPCHAIN_CREATE_PROTECTED_BIT_KHR flag set must: be
    supported for pname:surface.


include::{generated}/validity/structs/VkSurfaceProtectedCapabilitiesKHR.txt[]
--
endif::VK_KHR_surface_protected_capabilities[]

ifdef::VK_KHR_shared_presentable_image[]
[open,refpage='VkSharedPresentSurfaceCapabilitiesKHR',desc='structure describing capabilities of a surface for shared presentation',type='structs']
--
The sname:VkSharedPresentSurfaceCapabilitiesKHR structure is defined as:

include::{generated}/api/structs/VkSharedPresentSurfaceCapabilitiesKHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:sharedPresentSupportedUsageFlags is a bitmask of
    elink:VkImageUsageFlagBits representing the ways the application can:
    use the shared presentable image from a swapchain created with
    elink:VkPresentModeKHR set to
    ename:VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR or
    ename:VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR for the surface on
    the specified device.
    ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT must: be included in the set
    but implementations may: support additional usages.

include::{generated}/validity/structs/VkSharedPresentSurfaceCapabilitiesKHR.txt[]
--
endif::VK_KHR_shared_presentable_image[]

ifdef::VK_AMD_display_native_hdr[]
[open,refpage='VkDisplayNativeHdrSurfaceCapabilitiesAMD',desc='Structure describing display native HDR specific capabilities of a surface',type='structs']
--
The sname:VkDisplayNativeHdrSurfaceCapabilitiesAMD structure is defined as:

include::{generated}/api/structs/VkDisplayNativeHdrSurfaceCapabilitiesAMD.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:localDimmingSupport specifies whether the surface supports local
    dimming.
    If this is ename:VK_TRUE, slink:VkSwapchainDisplayNativeHdrCreateInfoAMD
    can: be used to explicitly enable or disable local dimming for the
    surface.
    Local dimming may also be overriden by flink:vkSetLocalDimmingAMD during
    the lifetime of the swapchain.

include::{generated}/validity/structs/VkDisplayNativeHdrSurfaceCapabilitiesAMD.txt[]
--
endif::VK_AMD_display_native_hdr[]

ifdef::VK_EXT_full_screen_exclusive[]
[open,refpage='VkSurfaceCapabilitiesFullScreenExclusiveEXT',desc='Structure describing full screen exclusive capabilities of a surface',type='structs']
--
The sname:VkSurfaceCapabilitiesFullScreenExclusiveEXT structure is defined
as:

include::{generated}/api/structs/VkSurfaceCapabilitiesFullScreenExclusiveEXT.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:fullScreenExclusiveControlSupported is a boolean describing
    whether the surface is able to make use of exclusive full-screen access.

This structure can: be included in the pname:pNext chain of
slink:VkSurfaceCapabilities2KHR to determine support for exclusive
full-screen access.
If pname:fullScreenExclusiveSupported is ename:VK_FALSE, it indicates that
exclusive full-screen access is not obtainable for this surface.

Applications must: not attempt to create swapchains with
ename:VK_FULL_SCREEN_EXCLUSIVE_APPLICATION_CONTROLLED_EXT set if
pname:fullScreenExclusiveSupported is ename:VK_FALSE.

include::{generated}/validity/structs/VkSurfaceCapabilitiesFullScreenExclusiveEXT.txt[]
--
endif::VK_EXT_full_screen_exclusive[]
endif::VK_KHR_get_surface_capabilities2[]

ifdef::VK_EXT_display_surface_counter[]
include::{chapters}/VK_EXT_display_surface_counter/surface_capabilities.txt[]
endif::VK_EXT_display_surface_counter[]

[open,refpage='VkSurfaceTransformFlagBitsKHR',desc='presentation transforms supported on a device',type='enums']
--
Bits which may: be set in
slink:VkSurfaceCapabilitiesKHR::pname:supportedTransforms indicating the
presentation transforms supported for the surface on the specified device,
and possible values of
slink:VkSurfaceCapabilitiesKHR::pname:currentTransform indicating the
surface's current transform relative to the presentation engine's natural
orientation, are:

include::{generated}/api/enums/VkSurfaceTransformFlagBitsKHR.txt[]

  * ename:VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR specifies that image content
    is presented without being transformed.
  * ename:VK_SURFACE_TRANSFORM_ROTATE_90_BIT_KHR specifies that image
    content is rotated 90 degrees clockwise.
  * ename:VK_SURFACE_TRANSFORM_ROTATE_180_BIT_KHR specifies that image
    content is rotated 180 degrees clockwise.
  * ename:VK_SURFACE_TRANSFORM_ROTATE_270_BIT_KHR specifies that image
    content is rotated 270 degrees clockwise.
  * ename:VK_SURFACE_TRANSFORM_HORIZONTAL_MIRROR_BIT_KHR specifies that
    image content is mirrored horizontally.
  * ename:VK_SURFACE_TRANSFORM_HORIZONTAL_MIRROR_ROTATE_90_BIT_KHR specifies
    that image content is mirrored horizontally, then rotated 90 degrees
    clockwise.
  * ename:VK_SURFACE_TRANSFORM_HORIZONTAL_MIRROR_ROTATE_180_BIT_KHR
    specifies that image content is mirrored horizontally, then rotated 180
    degrees clockwise.
  * ename:VK_SURFACE_TRANSFORM_HORIZONTAL_MIRROR_ROTATE_270_BIT_KHR
    specifies that image content is mirrored horizontally, then rotated 270
    degrees clockwise.
  * ename:VK_SURFACE_TRANSFORM_INHERIT_BIT_KHR specifies that the
    presentation transform is not specified, and is instead determined by
    platform-specific considerations and mechanisms outside Vulkan.
--

[open,refpage='VkSurfaceTransformFlagsKHR',desc='Bitmask of VkSurfaceTransformFlagBitsKHR',type='flags']
--
include::{generated}/api/flags/VkSurfaceTransformFlagsKHR.txt[]

tname:VkSurfaceTransformFlagsKHR is a bitmask type for setting a mask of
zero or more elink:VkSurfaceTransformFlagBitsKHR.
--

[open,refpage='VkCompositeAlphaFlagBitsKHR',desc='alpha compositing modes supported on a device',type='enums']
--
The pname:supportedCompositeAlpha member is of type
elink:VkCompositeAlphaFlagBitsKHR, which contains the following values:

include::{generated}/api/enums/VkCompositeAlphaFlagBitsKHR.txt[]

These values are described as follows:

  * ename:VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR: The alpha channel, if it
    exists, of the images is ignored in the compositing process.
    Instead, the image is treated as if it has a constant alpha of 1.0.
  * ename:VK_COMPOSITE_ALPHA_PRE_MULTIPLIED_BIT_KHR: The alpha channel, if
    it exists, of the images is respected in the compositing process.
    The non-alpha channels of the image are expected to already be
    multiplied by the alpha channel by the application.
  * ename:VK_COMPOSITE_ALPHA_POST_MULTIPLIED_BIT_KHR: The alpha channel, if
    it exists, of the images is respected in the compositing process.
    The non-alpha channels of the image are not expected to already be
    multiplied by the alpha channel by the application; instead, the
    compositor will multiply the non-alpha channels of the image by the
    alpha channel during compositing.
  * ename:VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR: The way in which the
    presentation engine treats the alpha channel in the images is unknown to
    the Vulkan API.
    Instead, the application is responsible for setting the composite alpha
    blending mode using native window system commands.
    If the application does not set the blending mode using native window
    system commands, then a platform-specific default will be used.
--

[open,refpage='VkCompositeAlphaFlagsKHR',desc='Bitmask of VkCompositeAlphaFlagBitsKHR',type='flags']
--
include::{generated}/api/flags/VkCompositeAlphaFlagsKHR.txt[]

tname:VkCompositeAlphaFlagsKHR is a bitmask type for setting a mask of zero
or more elink:VkCompositeAlphaFlagBitsKHR.
--


=== Surface Format Support

[open,refpage='vkGetPhysicalDeviceSurfaceFormatsKHR',desc='Query color formats supported by surface',type='protos']
--
To query the supported swapchain format-color space pairs for a surface,
call:

include::{generated}/api/protos/vkGetPhysicalDeviceSurfaceFormatsKHR.txt[]

  * pname:physicalDevice is the physical device that will be associated with
    the swapchain to be created, as described for
    flink:vkCreateSwapchainKHR.
  * pname:surface is the surface that will be associated with the swapchain.
  * pname:pSurfaceFormatCount is a pointer to an integer related to the
    number of format pairs available or queried, as described below.
  * pname:pSurfaceFormats is either `NULL` or a pointer to an array of
    sname:VkSurfaceFormatKHR structures.

If pname:pSurfaceFormats is `NULL`, then the number of format pairs
supported for the given pname:surface is returned in
pname:pSurfaceFormatCount.
Otherwise, pname:pSurfaceFormatCount must: point to a variable set by the
user to the number of elements in the pname:pSurfaceFormats array, and on
return the variable is overwritten with the number of structures actually
written to pname:pSurfaceFormats.
If the value of pname:pSurfaceFormatCount is less than the number of format
pairs supported, at most pname:pSurfaceFormatCount structures will be
written, and ename:VK_INCOMPLETE will be returned instead of
ename:VK_SUCCESS, to indicate that not all the available format pairs were
returned.

The number of format pairs supported must: be greater than or equal to 1.
pname:pSurfaceFormats must: not contain an entry whose value for
pname:format is ename:VK_FORMAT_UNDEFINED.

If pname:pSurfaceFormats includes an entry whose value for pname:colorSpace
is ename:VK_COLOR_SPACE_SRGB_NONLINEAR_KHR and whose value for pname:format
is a UNORM (or SRGB) format and the corresponding SRGB (or UNORM) format is
a color renderable format for ename:VK_IMAGE_TILING_OPTIMAL, then
pname:pSurfaceFormats must: also contain an entry with the same value for
pname:colorSpace and pname:format equal to the corresponding SRGB (or UNORM)
format.

.Valid Usage
****
include::{chapters}/commonvalidity/surface_physical_device_common.txt[]
****

include::{generated}/validity/protos/vkGetPhysicalDeviceSurfaceFormatsKHR.txt[]
--

[open,refpage='VkSurfaceFormatKHR',desc='Structure describing a supported swapchain format-color space pair',type='structs']
--
The sname:VkSurfaceFormatKHR structure is defined as:

include::{generated}/api/structs/VkSurfaceFormatKHR.txt[]

  * pname:format is a elink:VkFormat that is compatible with the specified
    surface.
  * pname:colorSpace is a presentation elink:VkColorSpaceKHR that is
    compatible with the surface.

include::{generated}/validity/structs/VkSurfaceFormatKHR.txt[]
--

ifdef::VK_KHR_get_surface_capabilities2[]
[open,refpage='vkGetPhysicalDeviceSurfaceFormats2KHR',desc='Query color formats supported by surface',type='protos']
--
To query the supported swapchain format tuples for a surface, call:

include::{generated}/api/protos/vkGetPhysicalDeviceSurfaceFormats2KHR.txt[]

  * pname:physicalDevice is the physical device that will be associated with
    the swapchain to be created, as described for
    flink:vkCreateSwapchainKHR.
  * pname:pSurfaceInfo is a pointer to a
    slink:VkPhysicalDeviceSurfaceInfo2KHR structure describing the surface
    and other fixed parameters that would be consumed by
    flink:vkCreateSwapchainKHR.
  * pname:pSurfaceFormatCount is a pointer to an integer related to the
    number of format tuples available or queried, as described below.
  * pname:pSurfaceFormats is either `NULL` or a pointer to an array of
    slink:VkSurfaceFormat2KHR structures.

flink:vkGetPhysicalDeviceSurfaceFormats2KHR behaves similarly to
flink:vkGetPhysicalDeviceSurfaceFormatsKHR, with the ability to be extended
via pname:pNext chains.

If pname:pSurfaceFormats is `NULL`, then the number of format tuples
supported for the given pname:surface is returned in
pname:pSurfaceFormatCount.
Otherwise, pname:pSurfaceFormatCount must: point to a variable set by the
user to the number of elements in the pname:pSurfaceFormats array, and on
return the variable is overwritten with the number of structures actually
written to pname:pSurfaceFormats.
If the value of pname:pSurfaceFormatCount is less than the number of format
tuples supported, at most pname:pSurfaceFormatCount structures will be
written, and ename:VK_INCOMPLETE will be returned instead of
ename:VK_SUCCESS, to indicate that not all the available values were
returned.

.Valid Usage
****
include::{chapters}/commonvalidity/surface_info_physical_device_common.txt[]
****

include::{generated}/validity/protos/vkGetPhysicalDeviceSurfaceFormats2KHR.txt[]
--

[open,refpage='VkSurfaceFormat2KHR',desc='Structure describing a supported swapchain format tuple',type='structs']
--
The sname:VkSurfaceFormat2KHR structure is defined as:

include::{generated}/api/structs/VkSurfaceFormat2KHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:surfaceFormat is a slink:VkSurfaceFormatKHR structure describing a
    format-color space pair that is compatible with the specified surface.

include::{generated}/validity/structs/VkSurfaceFormat2KHR.txt[]
--
endif::VK_KHR_get_surface_capabilities2[]

While the pname:format of a presentable image refers to the encoding of each
pixel, the pname:colorSpace determines how the presentation engine
interprets the pixel values.
A color space in this document refers to a specific color space (defined by
the chromaticities of its primaries and a white point in CIE Lab), and a
transfer function that is applied before storing or transmitting color data
in the given color space.

[open,refpage='VkColorSpaceKHR',desc='supported color space of the presentation engine',type='enums']
--
Possible values of slink:VkSurfaceFormatKHR::pname:colorSpace, specifying
supported color spaces of a presentation engine, are:

include::{generated}/api/enums/VkColorSpaceKHR.txt[]

  * ename:VK_COLOR_SPACE_SRGB_NONLINEAR_KHR specifies support for the sRGB
    color space.
ifdef::VK_EXT_swapchain_colorspace[]
  * ename:VK_COLOR_SPACE_DISPLAY_P3_NONLINEAR_EXT specifies support for the
    Display-P3 color space to be displayed using an sRGB-like EOTF (defined
    below).
  * ename:VK_COLOR_SPACE_EXTENDED_SRGB_LINEAR_EXT specifies support for the
    extended sRGB color space to be displayed using a linear EOTF.
  * ename:VK_COLOR_SPACE_EXTENDED_SRGB_NONLINEAR_EXT specifies support for
    the extended sRGB color space to be displayed using an sRGB EOTF.
  * ename:VK_COLOR_SPACE_DISPLAY_P3_LINEAR_EXT specifies support for the
    Display-P3 color space to be displayed using a linear EOTF.
  * ename:VK_COLOR_SPACE_DCI_P3_NONLINEAR_EXT specifies support for the
    DCI-P3 color space to be displayed using the DCI-P3 EOTF.
    Note that values in such an image are interpreted as XYZ encoded color
    data by the presentation engine.
  * ename:VK_COLOR_SPACE_BT709_LINEAR_EXT specifies support for the BT709
    color space to be displayed using a linear EOTF.
  * ename:VK_COLOR_SPACE_BT709_NONLINEAR_EXT specifies support for the BT709
    color space to be displayed using the SMPTE 170M EOTF.
  * ename:VK_COLOR_SPACE_BT2020_LINEAR_EXT specifies support for the BT2020
    color space to be displayed using a linear EOTF.
  * ename:VK_COLOR_SPACE_HDR10_ST2084_EXT specifies support for the HDR10
    (BT2020 color) space to be displayed using the SMPTE ST2084 Perceptual
    Quantizer (PQ) EOTF.
  * ename:VK_COLOR_SPACE_DOLBYVISION_EXT specifies support for the Dolby
    Vision (BT2020 color space), proprietary encoding, to be displayed using
    the SMPTE ST2084 EOTF.
  * ename:VK_COLOR_SPACE_HDR10_HLG_EXT specifies support for the HDR10
    (BT2020 color space) to be displayed using the Hybrid Log Gamma (HLG)
    EOTF.
  * ename:VK_COLOR_SPACE_ADOBERGB_LINEAR_EXT specifies support for the
    AdobeRGB color space to be displayed using a linear EOTF.
  * ename:VK_COLOR_SPACE_ADOBERGB_NONLINEAR_EXT specifies support for the
    AdobeRGB color space to be displayed using the Gamma 2.2 EOTF.
  * ename:VK_COLOR_SPACE_PASS_THROUGH_EXT specifies that color components
    are used "`as is`".
    This is intended to allow applications to supply data for color spaces
    not described here.
ifdef::VK_AMD_display_native_hdr[]
  * ename:VK_COLOR_SPACE_DISPLAY_NATIVE_AMD specifies support for the
    display's native color space.
    This matches the color space expectations of AMD's FreeSync2 standard,
    for displays supporting it.
endif::VK_AMD_display_native_hdr[]

[NOTE]
.Note
====
In the initial release of the `VK_KHR_surface` and `<<VK_KHR_swapchain>>`
extensions, the token ename: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,
ename:VK_COLOR_SPACE_SRGB_NONLINEAR_KHR is used instead for consistency with
Vulkan naming rules.
The older enum is still available for backwards compatibility.
====

[NOTE]
.Note
====
In older versions of this extension
ename:VK_COLOR_SPACE_DISPLAY_P3_LINEAR_EXT was misnamed
ename:VK_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 elink:VkColorSpaceKHR that correspond to
the following color spaces:

[[VK_EXT_swapchain_colorspace-table]]
.Color Spaces and Attributes
[options="header"]
|====
| Name           | Red Primary  | Green Primary | Blue Primary | White-point          | Transfer function
| DCI-P3         | 1.000, 0.000 | 0.000, 1.000  | 0.000, 0.000 | 0.3333, 0.3333       | DCI P3
| Display-P3     | 0.680, 0.320 | 0.265, 0.690  | 0.150, 0.060 | 0.3127, 0.3290 (D65) | Display-P3
| BT709          | 0.640, 0.330 | 0.300, 0.600  | 0.150, 0.060 | 0.3127, 0.3290 (D65) | ITU (SMPTE 170M)
| sRGB           | 0.640, 0.330 | 0.300, 0.600  | 0.150, 0.060 | 0.3127, 0.3290 (D65) | sRGB
| extended sRGB  | 0.640, 0.330 | 0.300, 0.600  | 0.150, 0.060 | 0.3127, 0.3290 (D65) | extended sRGB
| HDR10_ST2084   | 0.708, 0.292 | 0.170, 0.797  | 0.131, 0.046 | 0.3127, 0.3290 (D65) | ST2084 PQ
| DOLBYVISION    | 0.708, 0.292 | 0.170, 0.797  | 0.131, 0.046 | 0.3127, 0.3290 (D65) | ST2084 PQ
| HDR10_HLG      | 0.708, 0.292 | 0.170, 0.797  | 0.131, 0.046 | 0.3127, 0.3290 (D65) | HLG
| AdobeRGB       | 0.640, 0.330 | 0.210, 0.710  | 0.150, 0.060 | 0.3127, 0.3290 (D65) | AdobeRGB
|====

The transfer functions are described in the "`Transfer Functions`" chapter
of the <<data-format,Khronos Data Format Specification>>.

Except Display-P3 OETF, which is:

[latexmath]
+++++++++++++++++++
\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
  \end{cases}
\end{aligned}
+++++++++++++++++++

where [eq]#L# is the linear value of a color channel and [eq]#E# is the
encoded value (as stored in the image in memory).

[NOTE]
.Note
====
For most uses, the sRGB OETF is equivalent.
====
endif::VK_EXT_swapchain_colorspace[]
--


=== Surface Presentation Mode Support

[open,refpage='vkGetPhysicalDeviceSurfacePresentModesKHR',desc='Query supported presentation modes',type='protos']
--
To query the supported presentation modes for a surface, call:

include::{generated}/api/protos/vkGetPhysicalDeviceSurfacePresentModesKHR.txt[]

  * pname:physicalDevice is the physical device that will be associated with
    the swapchain to be created, as described for
    flink:vkCreateSwapchainKHR.
  * pname:surface is the surface that will be associated with the swapchain.
  * pname:pPresentModeCount is a pointer to an integer related to the number
    of presentation modes available or queried, as described below.
  * pname:pPresentModes is either `NULL` or a pointer to an array of
    elink:VkPresentModeKHR values, indicating the supported presentation
    modes.

If pname:pPresentModes is `NULL`, then the number of presentation modes
supported for the given pname:surface is returned in
pname:pPresentModeCount.
Otherwise, pname:pPresentModeCount must: point to a variable set by the user
to the number of elements in the pname:pPresentModes array, and on return
the variable is overwritten with the number of values actually written to
pname:pPresentModes.
If the value of pname:pPresentModeCount is less than the number of
presentation modes supported, at most pname:pPresentModeCount values will be
written, and ename:VK_INCOMPLETE will be returned instead of
ename:VK_SUCCESS, to indicate that not all the available modes were
returned.

.Valid Usage
****
include::{chapters}/commonvalidity/surface_physical_device_common.txt[]
****

include::{generated}/validity/protos/vkGetPhysicalDeviceSurfacePresentModesKHR.txt[]
--

ifdef::VK_EXT_full_screen_exclusive[]
[open,refpage='vkGetPhysicalDeviceSurfacePresentModes2EXT',desc='Query supported presentation modes',type='protos']
--
Alternatively, to query the supported presentation modes for a surface
combined with select other fixed swapchain creation parameters, call:

include::{generated}/api/protos/vkGetPhysicalDeviceSurfacePresentModes2EXT.txt[]

  * pname:physicalDevice is the physical device that will be associated with
    the swapchain to be created, as described for
    flink:vkCreateSwapchainKHR.
  * pname:pSurfaceInfo is a pointer to a
    slink:VkPhysicalDeviceSurfaceInfo2KHR structure describing the surface
    and other fixed parameters that would be consumed by
    flink:vkCreateSwapchainKHR.
  * pname:pPresentModeCount is a pointer to an integer related to the number
    of presentation modes available or queried, as described below.
  * pname:pPresentModes is either `NULL` or a pointer to an array of
    elink:VkPresentModeKHR values, indicating the supported presentation
    modes.

fname:vkGetPhysicalDeviceSurfacePresentModes2EXT behaves similarly to
flink:vkGetPhysicalDeviceSurfacePresentModesKHR, with the ability to specify
extended inputs via chained input structures.

.Valid Usage
****
include::{chapters}/commonvalidity/surface_info_physical_device_common.txt[]
****

include::{generated}/validity/protos/vkGetPhysicalDeviceSurfacePresentModes2EXT.txt[]
--
endif::VK_EXT_full_screen_exclusive[]

[open,refpage='VkPresentModeKHR',desc='presentation mode supported for a surface',type='enums']
--
Possible values of elements of the
flink:vkGetPhysicalDeviceSurfacePresentModesKHR::pname:pPresentModes array,
indicating the supported presentation modes for a surface, are:

include::{generated}/api/enums/VkPresentModeKHR.txt[]

  * ename:VK_PRESENT_MODE_IMMEDIATE_KHR specifies that the presentation
    engine does not wait for a vertical blanking period to update the
    current image, meaning this mode may: result in visible tearing.
    No internal queuing of presentation requests is needed, as the requests
    are applied immediately.
  * ename:VK_PRESENT_MODE_MAILBOX_KHR specifies that the presentation engine
    waits for the next vertical blanking period to update the current image.
    Tearing cannot: be observed.
    An internal single-entry queue is used to hold pending presentation
    requests.
    If the queue is full when a new presentation request is received, the
    new request replaces the existing entry, and any images associated with
    the prior entry become available for re-use by the application.
    One request is removed from the queue and processed during each vertical
    blanking period in which the queue is non-empty.
  * ename:VK_PRESENT_MODE_FIFO_KHR specifies that the presentation engine
    waits for the next vertical blanking period to update the current image.
    Tearing cannot: be observed.
    An internal queue is used to hold pending presentation requests.
    New requests are appended to the end of the queue, and one request is
    removed from the beginning of the queue and processed during each
    vertical blanking period in which the queue is non-empty.
    This is the only value of pname:presentMode that is required: to be
    supported.
  * ename:VK_PRESENT_MODE_FIFO_RELAXED_KHR specifies that the presentation
    engine generally waits for the next vertical blanking period to update
    the current image.
    If a vertical blanking period has already passed since the last update
    of the current image then the presentation engine does not wait for
    another vertical blanking period for the update, meaning this mode may:
    result in visible tearing in this case.
    This mode is useful for reducing visual stutter with an application that
    will mostly present a new image before the next vertical blanking
    period, but may occasionally be late, and present a new image just after
    the next vertical blanking period.
    An internal queue is used to hold pending presentation requests.
    New requests are appended to the end of the queue, and one request is
    removed from the beginning of the queue and processed during or after
    each vertical blanking period in which the queue is non-empty.
ifdef::VK_KHR_shared_presentable_image[]
  * ename:VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR specifies that the
    presentation engine and application have concurrent access to a single
    image, which is referred to as a _shared presentable image_.
    The presentation engine is only required to update the current image
    after a new presentation request is received.
    Therefore the application must: make a presentation request whenever an
    update is required.
    However, the presentation engine may: update the current image at any
    point, meaning this mode may: result in visible tearing.
  * ename:VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR specifies that the
    presentation engine and application have concurrent access to a single
    image, which is referred to as a _shared presentable image_.
    The presentation engine periodically updates the current image on its
    regular refresh cycle.
    The application is only required to make one initial presentation
    request, after which the presentation engine must: update the current
    image without any need for further presentation requests.
    The application can: indicate the image contents have been updated by
    making a presentation request, but this does not guarantee the timing of
    when it will be updated.
    This mode may: result in visible tearing if rendering to the image is
    not timed correctly.

The supported elink:VkImageUsageFlagBits of the presentable images of a
swapchain created for a surface may: differ depending on the presentation
mode, and can be determined as per the table below:

.Presentable image usage queries
[width="100%",cols="<50%,<50%",options="header"]
|====
| Presentation mode                                   | Image usage flags
| ename:VK_PRESENT_MODE_IMMEDIATE_KHR                 | slink:VkSurfaceCapabilitiesKHR::pname:supportedUsageFlags
| ename:VK_PRESENT_MODE_MAILBOX_KHR                   | slink:VkSurfaceCapabilitiesKHR::pname:supportedUsageFlags
| ename:VK_PRESENT_MODE_FIFO_KHR                      | slink:VkSurfaceCapabilitiesKHR::pname:supportedUsageFlags
| ename:VK_PRESENT_MODE_FIFO_RELAXED_KHR              | slink:VkSurfaceCapabilitiesKHR::pname:supportedUsageFlags
| ename:VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR     | slink:VkSharedPresentSurfaceCapabilitiesKHR::pname:sharedPresentSupportedUsageFlags
| ename:VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR | slink:VkSharedPresentSurfaceCapabilitiesKHR::pname:sharedPresentSupportedUsageFlags
|====
endif::VK_KHR_shared_presentable_image[]

[NOTE]
.Note
====
For reference, the mode indicated by ename:VK_PRESENT_MODE_FIFO_KHR is
equivalent to the behavior of {wgl|glX|egl}SwapBuffers with a swap interval
of 1, while the mode indicated by ename:VK_PRESENT_MODE_FIFO_RELAXED_KHR is
equivalent to the behavior of {wgl|glX}SwapBuffers with a swap interval of
-1 (from the {WGL|GLX}_EXT_swap_control_tear extensions).
====
--

ifdef::VK_EXT_full_screen_exclusive[]
== Full Screen Exclusive Control

Swapchains created with pname:fullScreenExclusive set to
ename:VK_FULL_SCREEN_EXCLUSIVE_APPLICATION_CONTROLLED_EXT must: acquire and
release exclusive full-screen access explicitly, using the following
commands.

[open,refpage='vkAcquireFullScreenExclusiveModeEXT',desc='Acquire full-screen exclusive mode for a swapchain',type='protos']
--
To acquire exclusive full-screen access for a swapchain, call:

include::{generated}/api/protos/vkAcquireFullScreenExclusiveModeEXT.txt[]

  * pname:device is the device associated with pname:swapchain.
  * pname:swapchain is the swapchain to acquire exclusive full-screen access
    for.

.Valid Usage
****
  * [[VUID-vkAcquireFullScreenExclusiveModeEXT-swapchain-02674]]
    pname:swapchain must: not be in the retired state
  * [[VUID-vkAcquireFullScreenExclusiveModeEXT-swapchain-02675]]
    pname:swapchain must: be a swapchain created with a
    slink:VkSurfaceFullScreenExclusiveInfoEXT structure, with
    pname:fullScreenExclusive set to
    ename:VK_FULL_SCREEN_EXCLUSIVE_APPLICATION_CONTROLLED_EXT
  * [[VUID-vkAcquireFullScreenExclusiveModeEXT-swapchain-02676]]
    pname:swapchain must: not currently have exclusive full-screen access
****

A return value of ename:VK_SUCCESS indicates that the pname:swapchain
successfully acquired exclusive full-screen access.
The swapchain will retain this exclusivity until either the application
releases exclusive full-screen access with
flink:vkReleaseFullScreenExclusiveModeEXT, destroys the swapchain, or if any
of the swapchain commands return
ename:VK_ERROR_FULL_SCREEN_EXCLUSIVE_MODE_LOST_EXT indicating that the mode
was lost because of platform-specific changes.

If the swapchain was unable to acquire exclusive full-screen access to the
display then ename:VK_ERROR_INITIALIZATION_FAILED is returned.
An application can: attempt to acquire exclusive full-screen access again
for the same swapchain even if this command fails, or if
ename:VK_ERROR_FULL_SCREEN_EXCLUSIVE_MODE_LOST_EXT has been returned by a
swapchain command.

include::{generated}/validity/protos/vkAcquireFullScreenExclusiveModeEXT.txt[]
--

[open,refpage='vkReleaseFullScreenExclusiveModeEXT',desc='Release full-screen exclusive mode from a swapchain',type='protos']
--
To release exclusive full-screen access from a swapchain, call:

include::{generated}/api/protos/vkReleaseFullScreenExclusiveModeEXT.txt[]

  * pname:device is the device associated with pname:swapchain.
  * pname:swapchain is the swapchain to release exclusive full-screen access
    from.

[NOTE]
.Note
====
Applications will not be able to present to pname:swapchain after this call
until exclusive full-screen access is reacquired.
This is usually useful to handle when an application is minimised or
otherwise intends to stop presenting for a time.
====

.Valid Usage
****
  * [[VUID-vkReleaseFullScreenExclusiveModeEXT-swapchain-02677]]
    pname:swapchain must: not be in the retired state
  * [[VUID-vkReleaseFullScreenExclusiveModeEXT-swapchain-02678]]
    pname:swapchain must: be a swapchain created with a
    slink:VkSurfaceFullScreenExclusiveInfoEXT structure, with
    pname:fullScreenExclusive set to
    ename:VK_FULL_SCREEN_EXCLUSIVE_APPLICATION_CONTROLLED_EXT
****
--
endif::VK_EXT_full_screen_exclusive[]


ifdef::VK_KHR_swapchain[]
ifdef::VK_VERSION_1_1,VK_KHR_device_group[]
== Device Group Queries

[open,refpage='vkGetDeviceGroupPresentCapabilitiesKHR',desc='Query present capabilities from other physical devices',type='protos']
--
A logical device that represents multiple physical devices may: support
presenting from images on more than one physical device, or combining images
from multiple physical devices.

To query these capabilities, call:

include::{generated}/api/protos/vkGetDeviceGroupPresentCapabilitiesKHR.txt[]

  * pname:device is the logical device.
  * pname:pDeviceGroupPresentCapabilities is a pointer to a
    slink:VkDeviceGroupPresentCapabilitiesKHR structure in which the
    device's capabilities are returned.

include::{generated}/validity/protos/vkGetDeviceGroupPresentCapabilitiesKHR.txt[]
--

[open,refpage='VkDeviceGroupPresentCapabilitiesKHR',desc='Present capabilities from other physical devices',type='structs']
--
The sname:VkDeviceGroupPresentCapabilitiesKHR structure is defined as:

include::{generated}/api/structs/VkDeviceGroupPresentCapabilitiesKHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:presentMask is an array of ename:VK_MAX_DEVICE_GROUP_SIZE
    code:uint32_t masks, where the mask at element [eq]#i# is non-zero if
    physical device [eq]#i# has a presentation engine, and where bit [eq]#j#
    is set in element [eq]#i# if physical device [eq]#i# can: present
    swapchain images from physical device [eq]#j#.
    If element [eq]#i# is non-zero, then bit [eq]#i# must: be set.
  * pname:modes is a bitmask of elink:VkDeviceGroupPresentModeFlagBitsKHR
    indicating which device group presentation modes are supported.

pname:modes always has ename:VK_DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR set.

The present mode flags are also used when presenting an image, in
slink:VkDeviceGroupPresentInfoKHR::pname:mode.

If a device group only includes a single physical device, then pname:modes
must: equal ename:VK_DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR.

include::{generated}/validity/structs/VkDeviceGroupPresentCapabilitiesKHR.txt[]
--


[open,refpage='VkDeviceGroupPresentModeFlagBitsKHR',desc='Bitmask specifying supported device group present modes',type='enums']
--
Bits which may: be set in
slink:VkDeviceGroupPresentCapabilitiesKHR::pname:modes to indicate which
device group presentation modes are supported are:

include::{generated}/api/enums/VkDeviceGroupPresentModeFlagBitsKHR.txt[]

  * ename:VK_DEVICE_GROUP_PRESENT_MODE_LOCAL_BIT_KHR specifies that any
    physical device with a presentation engine can: present its own
    swapchain images.
  * ename:VK_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 pname:presentMask.
  * ename:VK_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 pname:presentMask.
  * ename:VK_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.
--

[open,refpage='VkDeviceGroupPresentModeFlagsKHR',desc='Bitmask of VkDeviceGroupPresentModeFlagBitsKHR',type='flags']
--
include::{generated}/api/flags/VkDeviceGroupPresentModeFlagsKHR.txt[]

tname:VkDeviceGroupPresentModeFlagsKHR is a bitmask type for setting a mask
of zero or more elink:VkDeviceGroupPresentModeFlagBitsKHR.
--

[open,refpage='vkGetDeviceGroupSurfacePresentModesKHR',desc='Query present capabilities for a surface',type='protos']
--
Some surfaces may: not be capable of using all the device group present
modes.

To query the supported device group present modes for a particular surface,
call:

include::{generated}/api/protos/vkGetDeviceGroupSurfacePresentModesKHR.txt[]

  * pname:device is the logical device.
  * pname:surface is the surface.
  * pname:pModes is a pointer to a tlink:VkDeviceGroupPresentModeFlagsKHR in
    which the supported device group present modes for the surface are
    returned.

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
flink:vkGetDeviceGroupPresentCapabilitiesKHR.

.Valid Usage
****
  * [[VUID-vkGetDeviceGroupSurfacePresentModesKHR-surface-06212]]
    pname:surface must: be supported by all physical devices associated with
    pname:device, as reported by flink:vkGetPhysicalDeviceSurfaceSupportKHR
    or an equivalent platform-specific mechanism
****

include::{generated}/validity/protos/vkGetDeviceGroupSurfacePresentModesKHR.txt[]
--

ifdef::VK_EXT_full_screen_exclusive[]
[open,refpage='vkGetDeviceGroupSurfacePresentModes2EXT',desc='Query device group present capabilities for a surface',type='protos']
--
Alternatively, to query the supported device group presentation modes for a
surface combined with select other fixed swapchain creation parameters,
call:

include::{generated}/api/protos/vkGetDeviceGroupSurfacePresentModes2EXT.txt[]

  * pname:device is the logical device.
  * pname:pSurfaceInfo is a pointer to a
    slink:VkPhysicalDeviceSurfaceInfo2KHR structure describing the surface
    and other fixed parameters that would be consumed by
    flink:vkCreateSwapchainKHR.
  * pname:pModes is a pointer to a tlink:VkDeviceGroupPresentModeFlagsKHR in
    which the supported device group present modes for the surface are
    returned.

fname:vkGetDeviceGroupSurfacePresentModes2EXT behaves similarly to
flink:vkGetDeviceGroupSurfacePresentModesKHR, with the ability to specify
extended inputs via chained input structures.

.Valid Usage
****
  * [[VUID-vkGetDeviceGroupSurfacePresentModes2EXT-pSurfaceInfo-06213]]
    pname:pSurfaceInfo->surface must: be supported by all physical devices
    associated with pname:device, as reported by
    flink:vkGetPhysicalDeviceSurfaceSupportKHR or an equivalent
    platform-specific mechanism
****

include::{generated}/validity/protos/vkGetDeviceGroupSurfacePresentModes2EXT.txt[]
--
endif::VK_EXT_full_screen_exclusive[]

[open,refpage='vkGetPhysicalDevicePresentRectanglesKHR',desc='Query present rectangles for a surface on a physical device',type='protos']
--
When using ename:VK_DEVICE_GROUP_PRESENT_MODE_LOCAL_MULTI_DEVICE_BIT_KHR,
the application may: need to know which regions of the surface are used when
presenting locally on each physical device.
Presentation of swapchain images to this surface need only have valid
contents in the regions returned by this command.

To query a set of rectangles used in presentation on the physical device,
call:

include::{generated}/api/protos/vkGetPhysicalDevicePresentRectanglesKHR.txt[]

  * pname:physicalDevice is the physical device.
  * pname:surface is the surface.
  * pname:pRectCount is a pointer to an integer related to the number of
    rectangles available or queried, as described below.
  * pname:pRects is either `NULL` or a pointer to an array of slink:VkRect2D
    structures.

If pname:pRects is `NULL`, then the number of rectangles used when
presenting the given pname:surface is returned in pname:pRectCount.
Otherwise, pname:pRectCount must: point to a variable set by the user to the
number of elements in the pname:pRects array, and on return the variable is
overwritten with the number of structures actually written to pname:pRects.
If the value of pname:pRectCount is less than the number of rectangles, at
most pname:pRectCount structures will be written, and ename:VK_INCOMPLETE
will be returned instead of ename:VK_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
****
include::{chapters}/commonvalidity/surface_physical_device_common.txt[]
****

include::{generated}/validity/protos/vkGetPhysicalDevicePresentRectanglesKHR.txt[]
--
endif::VK_VERSION_1_1,VK_KHR_device_group[]

ifdef::VK_GOOGLE_display_timing[]
include::{chapters}/VK_GOOGLE_display_timing/queries.txt[]
endif::VK_GOOGLE_display_timing[]

ifdef::VK_KHR_present_wait[]
include::{chapters}/VK_KHR_present_wait/present_wait.txt[]
endif::VK_KHR_present_wait[]

include::{chapters}/VK_KHR_swapchain/wsi.txt[]
endif::VK_KHR_swapchain[]
