Vulkan-Docs/chapters/VK_KHR_android_surface/platformCreateSurface_android.txt
Jon Leech 56e0289318 Change log for January 05, 2019 Vulkan 1.1.97 spec update:
* Update release number to 97.

Public Issues:

  * Add a special case to the <<renderpass-compatibility, Render Pass
    Compatibility>> rules allowing single-subpass renderpasses to be
    compatible even if they have different resolve attachment references
    (public issue 835).
  * Fix the miss shader binding table record address rule in the
    <<shader-binding-table-indexing-rules, Miss Shaders>> section to index
    by code:missIndex, not code:sbtOffset (public issue 875).

Internal Issues:

  * Add a missing anchor to the elink:VkSamplerCreateFlagBits language
    (internal issue 1483).
  * Add missing implicit valid usage include for slink:VkHdrMetadataEXT and
    corresponding `noautovalidity` attributes in `vk.xml` for the
    externally-defined metadata properties (internal issue 1514).
  * Remove restrictions on the `mask` parameter of SPIR-V's
    code:OpGroupNonUniformXor in the <<spirvenv-module-validation,
    Validation Rules within a Module>> appendix (internal merge request
    2971).
  * Restore `noautovalidity` attribute for
    slink:VkPipelineViewportWScalingStateCreateInfoNV::pname:pViewportWScalings
    in `vk.xml` (internal merge request 2975).
  * Update copyright dates on Khronos-copyrighted files to 2019 (internal
    merge request 2980).

New Extensions:

  * `VK_KHR_depth_stencil_resolve`
  * `VK_EXT_buffer_device_address`
  * `VK_EXT_memory_budget`
  * `VK_EXT_memory_priority`
  * `VK_EXT_validation_features`
2019-01-05 19:40:12 -08:00

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// Copyright (c) 2014-2019 Khronos Group. This work is licensed under a
// Creative Commons Attribution 4.0 International License; see
// http://creativecommons.org/licenses/by/4.0/
[[platformCreateSurface_android,platformCreateSurface_android]]
=== Android Platform
[open,refpage='vkCreateAndroidSurfaceKHR',desc='Create a slink:VkSurfaceKHR object for an Android native window',type='protos']
--
To create a sname:VkSurfaceKHR object for an Android native window, call:
include::../../api/protos/vkCreateAndroidSurfaceKHR.txt[]
* pname:instance is the instance to associate the surface with.
* pname:pCreateInfo is a pointer to an instance of the
sname:VkAndroidSurfaceCreateInfoKHR structure containing parameters
affecting the creation of the surface object.
* 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>>).
* pname:pSurface points to a slink:VkSurfaceKHR handle in which the
created surface object is returned.
During the lifetime of a surface created using a particular
code:ANativeWindow handle any attempts to create another surface for the
same code:ANativeWindow and any attempts to connect to the same
code:ANativeWindow through other platform mechanisms will fail.
[NOTE]
.Note
====
In particular, only one sname:VkSurfaceKHR can: exist at a time for a given
window.
Similarly, a native window cannot: be used by both a sname:VkSurfaceKHR and
code:EGLSurface simultaneously.
====
If successful, fname:vkCreateAndroidSurfaceKHR increments the
code:ANativeWindow's reference count, and fname:vkDestroySurfaceKHR will
decrement it.
On Android, when a swapchain's pname:imageExtent does not match the
surface's pname:currentExtent, the presentable images will be scaled to the
surface's dimensions during presentation.
pname:minImageExtent is [eq]#(1,1)#, and pname:maxImageExtent is the maximum
image size supported by the consumer.
For the system compositor, pname:currentExtent is the window size (i.e. the
consumer's preferred size).
include::../../validity/protos/vkCreateAndroidSurfaceKHR.txt[]
--
[open,refpage='VkAndroidSurfaceCreateInfoKHR',desc='Structure specifying parameters of a newly created Android surface object',type='structs']
--
The sname:VkAndroidSurfaceCreateInfoKHR structure is defined as:
include::../../api/structs/VkAndroidSurfaceCreateInfoKHR.txt[]
* pname:sType is the type of this structure.
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
* pname:flags is reserved for future use.
* pname:window is a pointer to the code:ANativeWindow to associate the
surface with.
.Valid Usage
****
* [[VUID-VkAndroidSurfaceCreateInfoKHR-window-01248]]
pname:window must: point to a valid Android code:ANativeWindow.
****
include::../../validity/structs/VkAndroidSurfaceCreateInfoKHR.txt[]
--
[open,refpage='ANativeWindow',desc='Android native window type',type='defines']
--
To remove an unnecessary compile-time dependency, an incomplete type
definition of code:ANativeWindow is provided in the Vulkan headers:
include::../../api/defines/ANativeWindow.txt[]
The actual code:ANativeWindow type is defined in Android NDK headers.
--