Detect support for vertex shader texture lookups.

src/common/version.h

 #define MAJOR_VERSION 0
 #define MINOR_VERSION 0
 #define BUILD_VERSION 0
-#define BUILD_REVISION 635
+#define BUILD_REVISION 636
 
 #define STRINGIFY(x) #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)

src/libEGL/Display.cpp

 //
-// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
+// Copyright (c) 2002-2011 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
@@ -614,7 +614,7 @@ void Display::destroyContext(gl::Context *context)
     }
 }
 
-bool Display::isInitialized()
+bool Display::isInitialized() const
 {
     return mD3d9 != NULL && mConfigSet.size() > 0;
 }
@@ -854,4 +854,23 @@ const char *Display::getExtensionString() const
     return mExtensionString.c_str();
 }
 
+// Only Direct3D 10 ready devices support all the necessary vertex texture formats.
+// We test this using D3D9 by checking support for the R16F format.
+bool Display::getVertexTextureSupport() const
+{
+    return false;   // Disabled until full VTF support is implemented
+
+    if (!isInitialized() || mDeviceCaps.PixelShaderVersion < D3DPS_VERSION(3, 0))
+    {
+        return false;
+    }
+
+    D3DDISPLAYMODE currentDisplayMode;
+    mD3d9->GetAdapterDisplayMode(mAdapter, &currentDisplayMode);
+
+    HRESULT result = mD3d9->CheckDeviceFormat(mAdapter, mDeviceType, currentDisplayMode.Format, D3DUSAGE_QUERY_VERTEXTEXTURE, D3DRTYPE_TEXTURE, D3DFMT_R16F);
+
+    return SUCCEEDED(result);
+}
+
 }

src/libEGL/Display.h

 //
-// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
+// Copyright (c) 2002-2011 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
@@ -49,7 +49,7 @@ class Display
     void destroySurface(egl::Surface *surface);
     void destroyContext(gl::Context *context);
 
-    bool isInitialized();
+    bool isInitialized() const;
     bool isValidConfig(EGLConfig config);
     bool isValidContext(gl::Context *context);
     bool isValidSurface(egl::Surface *surface);
@@ -69,6 +69,7 @@ class Display
     virtual bool getLuminanceTextureSupport();
     virtual bool getLuminanceAlphaTextureSupport();
     virtual bool getNonPow2TextureSupport();
+    virtual bool getVertexTextureSupport() const;
     virtual D3DPOOL getBufferPool(DWORD usage) const;
 
     bool isD3d9ExDevice() { return mD3d9Ex != NULL; }