Do not check format caps for D3DFMT_NULL.

src/libANGLE/renderer/d3d/d3d9/formatutils9.h

@@ -67,6 +67,8 @@ struct TextureFormat
 };
 const TextureFormat &GetTextureFormatInfo(GLenum internalFormat);
 
+extern const D3DFORMAT D3DFMT_NULL;
+
 }
 
 }

src/libANGLE/renderer/d3d/d3d9/renderer9_utils.cpp

@@ -276,6 +276,9 @@ static gl::TextureCaps GenerateTextureFormatCaps(GLenum internalFormat, IDirect3
 
     const d3d9::TextureFormat &d3dFormatInfo = d3d9::GetTextureFormatInfo(internalFormat);
     const gl::InternalFormat &formatInfo = gl::GetInternalFormatInfo(internalFormat);
+
+    if (d3dFormatInfo.texFormat != d3d9::D3DFMT_NULL)
+    {
         if (formatInfo.depthBits > 0 || formatInfo.stencilBits > 0)
         {
             textureCaps.texturable = SUCCEEDED(d3d9->CheckDeviceFormat(adapter, deviceType, adapterFormat, 0, D3DRTYPE_TEXTURE, d3dFormatInfo.texFormat));
@@ -301,6 +304,7 @@ static gl::TextureCaps GenerateTextureFormatCaps(GLenum internalFormat, IDirect3
                 textureCaps.sampleCounts.insert(i);
             }
         }
+    }
 
     return textureCaps;
 }