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#pragma once
/*! \brief A class wrapper for GDI+ initialization
Author: Ryan Johnston, see http://www.codeproject.com/vcpp/gdiplus/GDIPlusControl.asp
\ingroup GDIpGroup
*/
class CGDIpInitializer
{
public:
//! Constructor offers the ability to initialize on construction, or delay until needed.
CGDIpInitializer(bool bInitCtorDtor = false);
//! If GDI+ has not explicitly been Deinitialized, do it in the destructor
virtual ~CGDIpInitializer();
/*! \brief Initialize function, makes sure only one GDI+ is called for each process.
This function creates a file mapping based on the current process id.
If the mapping already exists, it knows that another instance of this class
elsewhere in the process has already taken care of starting GDI+.
*/
void Initialize();
/*! \brief Deinitialize or decrease initialize count.
No tricks to this function. If this was the class that originally started GDI+,
and its initialization count has reached zero, it shuts down GDI+.
*/
void Deinitialize();
private:
HANDLE m_hMap;
bool m_bInited, m_bInitCtorDtor;
ULONG_PTR m_gdiplusToken;
Gdiplus::GdiplusStartupInput m_gdiplusStartupInput;
static long m_initcount;
};
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Jonathan de Halleux is Civil Engineer in Applied Mathematics. He finished his PhD in 2004 in the rainy country of Belgium. After 2 years in the Common Language Runtime (i.e. .net), he is now working at Microsoft Research on Pex (http://research.microsoft.com/pex).