kc3-lang/angle/extensions/EGL_ANGLE_vulkan_display.txt

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• Hash : 61180d01
  Author :
  Date : 2020-10-12T16:40:13
  

  Reland "Add support for Linux vulkan backend with VK_KHR_display"
  
  This is a reland of a7bb6a9b15ddeb8497523f8871deb25de2676d9f
  
  Original change's description:
  > Add support for Linux vulkan backend with VK_KHR_display
  >
  > Implement Linux simple display mode with vulkan backend
  > through VK_KHR_display.
  >
  > Added value 'EGL_PLATFORM_VULKAN_DISPLAY_MODE_SIMPLE_ANGLE' for
  > attribute EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE to identify
  > the new simple display mode. Also reserved
  > EGL_PLATFORM_VULKAN_DISPLAY_MODE_HEADLESS_ANGLE for headless mode.
  >
  > How to enable:
  > Add
  >
  > ```
  > use_x11=false
  > angle_vulkan_display_mode="simple" # default value
  > ```
  >
  > into args.gn, then compile with linux vulkan args.
  >
  > Bug: angleproject:5214
  > Change-Id: I1247585b9de8b55df106aba99322281f1c183203
  > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2494320
  > Commit-Queue: Jamie Madill <jmadill@chromium.org>
  > Reviewed-by: Jamie Madill <jmadill@chromium.org>
  > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  
  Bug: angleproject:5214
  Change-Id: I3921f6cb292c86658f39e739a878baad1ef64dba
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2515327
  Commit-Queue: Xiaoxuan Liu <xiaoxuan.liu@arm.com>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• extensions/EGL_ANGLE_vulkan_display.txt

• Name
  
      ANGLE_vulkan_display
  
  Name Strings
  
      EGL_ANGLE_vulkan_display
  
  Contributors
  
      Xiaoxuan Liu, Arm Ltd.
      Sunny Sun, Arm Ltd.
  
  Contacts
  
      Xiaoxuan Liu, Arm Ltd. (xiaoxuan 'dot' liu 'at' arm 'dot' com)
  
  Status
  
      Draft
  
  Version
  
      Version 1, 2020-10-29
  
  Number
  
      EGL Extension XXX
  
  Extension Type
  
      EGL client extension
  
  Dependencies
  
      Requires EGL_EXT_platform_angle_vulkan.
  
  Overview
  
      This extension allows ANGLE to use simple display mode through
      VK_KHR_display without native platform support (e.g. X11, GBM).
      The EGLSurfaces to be created from native types only contain the
      basic width and height info.
  
  New Types
  
      The basic structure to represent a display window, used by vulkan
      backend to create valid display with VK_KHR_display.
  
          typedef struct displayWindow
          {
              khronos_uint16_t width;
              khronos_uint16_t height;
          } DisplayWindow;
  
  New Procedures and Functions
  
      None
  
  New Tokens
  
      Accepted as values for the EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE
      attribute:
  
          EGL_PLATFORM_VULKAN_DISPLAY_MODE_SIMPLE_ANGLE 0x34A4
          EGL_PLATFORM_VULKAN_DISPLAY_MODE_HEADLESS_ANGLE 0x34A5
  
  Additions to the EGL Specification
  
      None
  
  New Behavior
  
      To obtain an simple EGLDisplay backed by a ANGLE vulkan with
      VK_KHR_display, request a display that is backed by a Vulkan driver
      through EGL_ANGLE_platform_angle_vulkan. And the value of attribute
      EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE should be
      EGL_PLATFORM_VULKAN_DISPLAY_MODE_SIMPLE_ANGLE or
      EGL_PLATFORM_VULKAN_DISPLAY_MODE_HEADLESS_ANGLE.
  
      If an EGLDisplay is backed by  ANGLE vulkan VK_KHR_display and the
      value of attribute EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE is
      set but neither EGL_PLATFORM_VULKAN_DISPLAY_MODE_SIMPLE_ANGLE or
      EGL_PLATFORM_VULKAN_DISPLAY_MODE_HEADLESS_ANGLE, then EGL_NO_DISPLAY
      should be returned.
  
  Issues
  
      None
  
  Revision History
  
      Version 1, 2020-10-29 (Xiaoxuan Liu)
        - Initial draft
  
  

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