kc3-lang/angle/extensions/EGL_ANGLE_surface_d3d_texture_2d_share_handle.txt

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  Date : 2012-01-17T14:28:13
  

  Update extension numbers for published extensions.
  
  git-svn-id: https://angleproject.googlecode.com/svn/trunk@945 736b8ea6-26fd-11df-bfd4-992fa37f6226
  

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• extensions/EGL_ANGLE_surface_d3d_texture_2d_share_handle.txt

• Name
  
      ANGLE_surface_d3d_texture_2d_share_handle
  
  Name Strings
  
      EGL_ANGLE_surface_d3d_texture_2d_share_handle
  
  Contributors
  
      Vladimir Vukicevic
      Daniel Koch
  
  Contacts
  
      Vladimir Vukicevic (vladimir 'at' pobox.com)
  
  Status
  
      Complete
      Implemented (ANGLE r558)
  
  Version
  
      Version 2, December 21, 2010
  
  Number
  
      EGL Extension #29
  
  Dependencies
  
      Requires the EGL_ANGLE_query_surface_pointer extension.
  
      This extension is written against the wording of the EGL 1.4
      Specification.
  
  Overview
  
      Some EGL implementations generate EGLSurface handles that are
      backed by Direct3D 2D textures.  For such surfaces, a D3D share
      handle can be generated, allowing access to the same surface
      from the Direct3D API.
  
  New Types
  
      None
  
  New Procedures and Functions
  
      None
  
  New Tokens
  
      Accepted in the <attribute> parameter of eglQuerySurfacePointerANGLE:
  
          EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE            0x3200
  
  Additions to Chapter 3 of the EGL 1.4 Specification (EGL Functions and Errors)
  
      Add to table 3.5, "Queryable surface attributes and types":
  
          Attribute                              Type      Description
          ---------                              ----      -----------
          EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE  pointer   Direct3D share handle
  
      Add before the last paragraph in section 3.5, "Surface attributes":
  
     "Querying EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE returns a Direct3D
      share handle, or NULL if a share handle for the surface is not
      available.  The share handle must be queried using
      eglQuerySurfaceAttribPointerANGLE.  Before using a Direct3D surface
      created with this share handle, ensure that all rendering
      to the EGLSurface with EGL client APIs has completed.
  
      The Direct3D share handle may be passed as the pSharedHandle
      parameter of the Direct3D9Ex CreateTexture function, or via the
      Direct3D10 OpenSharedResource function.  If used with Direct3D 9,
      the level argument to CreateTexture must be 1, and the dimensions
      must match the dimensions of the EGL surface.  If used with
      Direct3D 10, OpenSharedResource should be called with the
      ID3D10Texture2D uuid to obtain an ID3D10Texture2D object.
  
  Issues
  
  Revision History
  
      Version 3, 2011/02/11 - publish
  
      Version 2, 2010/12/21
        - renamed token to EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE (adding "2D")
        - renamed extension to ANGLE_surface_d3d_texture_2d_share_handle
        - added language about supported usage of the shared handle from D3D
  
      Version 1, 2010/12/07 - first draft.
  

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