1 files changed, 89 insertions, 0 deletions
diff --git a/Source/WebCore/platform/win/HWndDC.h b/Source/WebCore/platform/win/HWndDC.h
new file mode 100644
index 000000000..c7586c3e5
--- /dev/null
+++ b/Source/WebCore/platform/win/HWndDC.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef HWndDC_h
+#define HWndDC_h
+
+#include <windows.h>
+#include <wtf/NonCopyable.h>
+
+namespace WebCore {
+
+class HWndDC {
+    WTF_MAKE_NONCOPYABLE(HWndDC);
+public:
+    HWndDC()
+        : m_hwnd(0)
+        , m_hdc(0)
+    {
+    }
+
+    explicit HWndDC(HWND hwnd)
+        : m_hwnd(hwnd)
+        , m_hdc(::GetDC(hwnd))
+    {
+    }
+
+    HWndDC(HWND hwnd, HRGN hrgnClip, DWORD flags)
+        : m_hwnd(hwnd)
+        , m_hdc(::GetDCEx(hwnd, hrgnClip, flags))
+    {
+    }
+
+    ~HWndDC()
+    {
+        clear();
+    }
+
+    HDC setHWnd(HWND hwnd)
+    {
+        clear();
+        m_hwnd = hwnd;
+        m_hdc = ::GetDC(hwnd);
+        return m_hdc;
+    }
+
+    void clear()
+    {
+        if (!m_hdc)
+            return;
+        ::ReleaseDC(m_hwnd, m_hdc);
+        m_hwnd = 0;
+        m_hdc = 0;
+    }
+
+    operator HDC()
+    {
+        return m_hdc;
+    }
+
+private:
+    HWND m_hwnd;
+    HDC m_hdc;
+};
+
+} // namespace WebCore
+
+#endif // HWndDC_h