AOO410/main/canvas/source/directx/dx_gdiplususer.cxx

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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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 * specific language governing permissions and limitations
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_canvas.hxx"

#include <osl/mutex.hxx>

#include "dx_winstuff.hxx"
#include "dx_gdiplususer.hxx"


namespace dxcanvas
{
    namespace
    {
        ::osl::Mutex* 	p_gdiPlusUsageCountMutex( osl::Mutex::getGlobalMutex() );
        int				n_gdiPlusUsageCount( 0 );

        ULONG_PTR		a_GdiPlusToken;		// GDI+ handle. Owned by this object        
    }

    GDIPlusUserSharedPtr GDIPlusUser::createInstance()
    {
        return GDIPlusUserSharedPtr( new GDIPlusUser() );
    }

    GDIPlusUser::~GDIPlusUser()
    {
        ::osl::MutexGuard aGuard( *p_gdiPlusUsageCountMutex ); 

        --n_gdiPlusUsageCount;

        if( n_gdiPlusUsageCount == 0 )
            Gdiplus::GdiplusShutdown( a_GdiPlusToken );
    }

    GDIPlusUser::GDIPlusUser()
    {
        ::osl::MutexGuard aGuard( *p_gdiPlusUsageCountMutex ); 

        if( n_gdiPlusUsageCount == 0 )
        {
            // Setup GDI+

            // No extras here, simply taking GdiplusStartupInput's
            // default constructor
            Gdiplus::GdiplusStartupInput gdiPlusStartupInput;

            Gdiplus::GdiplusStartup( &a_GdiPlusToken, 
                                     &gdiPlusStartupInput, 
                                     NULL );
        }

        ++n_gdiPlusUsageCount;
    }
}