Detect presence of dwrite_1.h.

src/utils/win/SkDWrite.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkDWrite_DEFINED
 #define SkDWrite_DEFINED
 
 #include "SkTemplates.h"
 
 #include <dwrite.h>
+#include <winsdkver.h>
 
 class SkString;
 
 ////////////////////////////////////////////////////////////////////////////////
 // Factory
 
+#ifndef SK_HAS_DWRITE_1_H
+#define SK_HAS_DWRITE_1_H (WINVER_MAXVER >= 0x0602)
+#endif
+
 IDWriteFactory* sk_get_dwrite_factory();
 
 ////////////////////////////////////////////////////////////////////////////////
 // String conversion
 
 /** Prefer to use this type to prevent template proliferation. */
 typedef SkAutoSTMalloc<16, WCHAR> SkSMallocWCHAR;
 
 /** Converts a utf8 string to a WCHAR string. */
 HRESULT sk_cstring_to_wchar(const char* skname, SkSMallocWCHAR* name);
@@ skipping 39 matching lines @@
 template<typename T> class AutoTDWriteTable : public AutoDWriteTable {
 public:
     static const UINT32 tag = DWRITE_MAKE_OPENTYPE_TAG(T::TAG0, T::TAG1, T::TAG2, T::TAG3);
     AutoTDWriteTable(IDWriteFontFace* fontFace) : AutoDWriteTable(fontFace, tag) { }
 
     const T* get() const { return reinterpret_cast<const T*>(fData); }
     const T* operator->() const { return reinterpret_cast<const T*>(fData); }
 };
 
 #endif