Add support for RGB10A2 in eglCreatePbufferFromClientBuffer

Bug: chromium:937108

Change-Id: I689562ebff9f9f85ecb8af918bbb788b16b0f91b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1565420
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

extensions/EGL_ANGLE_d3d_texture_client_buffer.txt

@@ -10,6 +10,7 @@ Contributors
 
     Geoff Lang
     Olli Etuaho
+    Sunny Sachanandani
 
 Contacts
 
@@ -90,8 +91,9 @@ Additions to Chapter 3 of the EGL 1.5 Specification (EGL Functions and Errors)
                        DXGI_FORMAT_B8G8R8A8_UNORM_SRGB (support is optional),
                        DXGI_FORMAT_R8G8B8A8_TYPELESS (support is optional),
                        DXGI_FORMAT_B8G8R8A8_TYPELESS (support is optional),
-                       DXGI_FORMAT_R16G16B16A16_FLOAT or
-                       DXGI_FORMAT_R32G32B32A32_FLOAT.
+                       DXGI_FORMAT_R16G16B16A16_FLOAT,
+                       DXGI_FORMAT_R32G32B32A32_FLOAT or
+                       DXGI_FORMAT_R10G10B10A2_UNORM.
     --------------------------------------------------------------------------
     Table egl.restrictions - Restrictions on D3D resources that can be used
     as a <buffer>.
@@ -135,8 +137,10 @@ Issues
 
 Revision History
 
+    Version 4, 2019/04/15 - added support for DXGI_FORMAT_R10G10B10A2_UNORM.
+
     Version 3, 2018/01/23 - added support for typeless textures.
 
     Version 2, 2018/01/15 - clarified SRGB conversion handling.
 
-    Version 1, 2016/10/05 - first draft.
+    Version 1, 2016/10/05 - first draft.

src/libANGLE/renderer/d3d/d3d11/Renderer11.cpp

@@ -1326,6 +1326,7 @@ egl::Error Renderer11::getD3DTextureInfo(const egl::Config *configuration,
         case DXGI_FORMAT_B8G8R8A8_TYPELESS:
         case DXGI_FORMAT_R16G16B16A16_FLOAT:
         case DXGI_FORMAT_R32G32B32A32_FLOAT:
+        case DXGI_FORMAT_R10G10B10A2_UNORM:
             break;
 
         default: