ANGLE: Add support for querying platform device

The EGL_EXT_device_base extension allows for querying the platform
device of the graphics hardware via eglQueryDisplayAttribEXT().
As that extension is not supported by ANGLE, this patch adds similar
functionality to the existing eglQuerySurfacePointerANGLE API. When
EGL_DEVICE_EXT is passed as the queried attribute, the underlying
D3D/DXGI device pointer is passed back to the caller via the value
argument.

The D3D device is needed for video support in QtMultimedia as well as
the IDXGIDevice3::Trim() calls required by the Windows Store.

Change-Id: Ibdf228d81d6604e56db9dd8597d7cd2983ebc428
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

1 files changed, 37 insertions, 10 deletions

diff --git a/src/3rdparty/angle/src/libEGL/libEGL.cpp b/src/3rdparty/angle/src/libEGL/libEGL.cpp
index a08e1edeab..c236d52a4f 100644
--- a/src/3rdparty/angle/src/libEGL/libEGL.cpp
+++ b/src/3rdparty/angle/src/libEGL/libEGL.cpp
@@ -15,6 +15,9 @@
 #include "libGLESv2/Texture.h"
 #include "libGLESv2/main.h"
 #include "libGLESv2/renderer/SwapChain.h"
+#if defined(ANGLE_ENABLE_D3D11)
+#  include "libGLESv2/renderer/d3d/d3d11/Renderer11.h"
+#endif
 
 #include "libEGL/main.h"
 #include "libEGL/Display.h"
@@ -481,24 +484,48 @@ EGLBoolean __stdcall eglQuerySurfacePointerANGLE(EGLDisplay dpy, EGLSurface surf
     egl::Display *display = static_cast<egl::Display*>(dpy);
     egl::Surface *eglSurface = (egl::Surface*)surface;
 
-    if (!validateSurface(display, eglSurface))
-    {
-        return EGL_FALSE;
-    }
-
-    if (surface == EGL_NO_SURFACE)
-    {
-        return egl::error(EGL_BAD_SURFACE, EGL_FALSE);
-    }
-
     switch (attribute)
     {
       case EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE:
         {
+            if (!validateSurface(display, eglSurface))
+            {
+                return EGL_FALSE;
+            }
+
+            if (surface == EGL_NO_SURFACE)
+            {
+                return egl::error(EGL_BAD_SURFACE, EGL_FALSE);
+            }
+
             rx::SwapChain *swapchain = eglSurface->getSwapChain();
             *value = (void*) (swapchain ? swapchain->getShareHandle() : NULL);
         }
         break;
+#if defined(ANGLE_ENABLE_D3D11)
+      case EGL_DEVICE_EXT:
+        {
+            if (!validateDisplay(display))
+            {
+                return EGL_FALSE;
+            }
+
+            rx::Renderer *renderer = display->getRenderer();
+            if (!renderer)
+            {
+                *value = NULL;
+                break;
+            }
+
+            if (renderer->getMajorShaderModel() < 4)
+            {
+                return egl::error(EGL_BAD_CONTEXT, EGL_FALSE);
+            }
+
+            *value = static_cast<rx::Renderer11*>(renderer)->getDevice();
+        }
+        break;
+#endif
       default:
         return egl::error(EGL_BAD_ATTRIBUTE, EGL_FALSE);
     }