LibreOffice Module vcl (master)  1
scopedbitmapaccess.hxx
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19 
20 #ifndef INCLUDED_VCL_SCOPEDBITMAPACCESS_HXX
21 #define INCLUDED_VCL_SCOPEDBITMAPACCESS_HXX
22 
23 namespace vcl
24 {
25 
46 template < class Access, class Bitmap, Access* (Bitmap::* Acquire)() > class ScopedBitmapAccess
47 {
48 public:
49  explicit ScopedBitmapAccess( Bitmap& rBitmap ) :
50  mpAccess( nullptr ),
51  mpBitmap( &rBitmap )
52  {
53  mpAccess = (mpBitmap->*Acquire)();
54  }
55 
56  ScopedBitmapAccess( Access* pAccess, Bitmap& rBitmap ) :
57  mpAccess( pAccess ),
58  mpBitmap( &rBitmap )
59  {
60  }
61 
63  mpAccess( nullptr ),
64  mpBitmap( nullptr )
65  {
66  }
67 
68  // Move semantics
70  {
71  mpAccess=other.mpAccess;
72  mpBitmap=other.mpBitmap;
73  other.mpAccess = nullptr;
74  other.mpBitmap = nullptr;
75  return *this;
76  }
77 
78  // Disable copy from lvalue.
79  ScopedBitmapAccess(const ScopedBitmapAccess&) = delete;
81 
82  ~ScopedBitmapAccess() COVERITY_NOEXCEPT_FALSE
83  {
84  if (mpAccess)
86  }
87 
88  void reset()
89  {
90  if (mpAccess)
91  {
93  mpAccess = nullptr;
94  }
95  }
96 
97  bool operator!() const { return !mpAccess; }
98  explicit operator bool() const
99  {
100  return mpAccess;
101  }
102 
103  Access* get() { return mpAccess; }
104  const Access* get() const { return mpAccess; }
105 
106  Access* operator->() { return mpAccess; }
107  const Access* operator->() const { return mpAccess; }
108 
109  Access& operator*() { return *mpAccess; }
110  const Access& operator*() const { return *mpAccess; }
111 
112 private:
115 };
116 
117 }
118 
119 #endif // INCLUDED_VCL_SCOPEDBITMAPACCESS_HXX
120 
121 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
This template handles BitmapAccess the RAII way.
ScopedBitmapAccess(Access *pAccess, Bitmap &rBitmap)
const Access & operator*() const
static void ReleaseAccess(BitmapInfoAccess *pAccess)
ScopedBitmapAccess & operator=(ScopedBitmapAccess &&other)
ScopedBitmapAccess(Bitmap &rBitmap)
const Access * operator->() const
~ScopedBitmapAccess() COVERITY_NOEXCEPT_FALSE