1 files changed, 63 insertions, 0 deletions
diff --git a/ui/gfx/win_util.cc b/ui/gfx/win_util.cc
new file mode 100644
index 0000000..9941a65
--- /dev/null
+++ b/ui/gfx/win_util.cc
@@ -0,0 +1,63 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gfx/win_util.h"
+
+#include <windows.h>
+
+#include "base/win/windows_version.h"
+
+namespace {
+
+bool DynamicLibraryPresent(const wchar_t* lib_name) {
+  HINSTANCE lib = LoadLibrary(lib_name);
+  if (lib) {
+    FreeLibrary(lib);
+    return true;
+  }
+  return false;
+}
+
+}  // namespace
+
+namespace gfx {
+
+// Returns true if Direct2d is available, false otherwise.
+bool Direct2dIsAvailable() {
+  static bool checked = false;
+  static bool available = false;
+
+  if (!checked) {
+    base::win::Version version = base::win::GetVersion();
+    if (version < base::win::VERSION_VISTA)
+      available = false;
+    else if (version >= base::win::VERSION_WIN7)
+      available = true;
+    else
+      available = DynamicLibraryPresent(L"d2d1.dll");
+    checked = true;
+  }
+  return available;
+}
+
+// Returns true if DirectWrite is available, false otherwise.
+bool DirectWriteIsAvailable() {
+  static bool checked = false;
+  static bool available = false;
+
+  if (!checked) {
+    base::win::Version version = base::win::GetVersion();
+    if (version < base::win::VERSION_VISTA)
+      available = false;
+    else if (version >= base::win::VERSION_WIN7)
+      available = true;
+    else
+      available = DynamicLibraryPresent(L"dwrite.dll");
+    checked = true;
+  }
+  return available;
+}
+
+}  // namespace gfx
+