1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_WIN_SCOPED_GDI_OBJECT_H_ 6 #define BASE_WIN_SCOPED_GDI_OBJECT_H_ 7 8 #include <windows.h> 9 10 #include "base/scoped_generic.h" 11 12 namespace base { 13 namespace win { 14 15 namespace internal { 16 17 template <class T> 18 struct ScopedGDIObjectTraits { 19 static T InvalidValue() { return nullptr; } 20 static void Free(T object) { DeleteObject(object); } 21 }; 22 23 // An explicit specialization for HICON because we have to call DestroyIcon() 24 // instead of DeleteObject() for HICON. 25 template <> 26 void inline ScopedGDIObjectTraits<HICON>::Free(HICON icon) { 27 DestroyIcon(icon); 28 } 29 30 } // namespace internal 31 32 // Like ScopedHandle but for GDI objects. 33 template <class T> 34 using ScopedGDIObject = ScopedGeneric<T, internal::ScopedGDIObjectTraits<T>>; 35 36 // Typedefs for some common use cases. 37 typedef ScopedGDIObject<HBITMAP> ScopedBitmap; 38 typedef ScopedGDIObject<HRGN> ScopedRegion; 39 typedef ScopedGDIObject<HFONT> ScopedHFONT; 40 typedef ScopedGDIObject<HICON> ScopedHICON; 41 42 } // namespace win 43 } // namespace base 44 45 #endif // BASE_WIN_SCOPED_GDI_OBJECT_H_ 46
