scgdiplus.cpp

Source code for EMFexplorer 1.0

/*
*	This file is part of the EMFexplorer projet.
*	Copyright (C) 2004 Smith Charles.
*
*	This library is free software; you can redistribute it and/or
*	modify it under the terms of the GNU Lesser General Public
*	License as published by the Free Software Foundation; either
*	version 2.1 of the License, or (at your option) any later version.
*
*   This library is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
*   Lesser General Public License for more details.
*
*   You should have received a copy of the GNU Lesser General Public
*   License along with this library; if not, write to the Free Software
*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
*
*	Extension: for commercial use, apply the Equity Public License, which
*	adds to the normal terms of the GLPL a condition of donation to the author.
*   If you are interested in support for this source code,
*   contact Smith Charles <[e-mail]> for more information.
*/


#include "stdafx.h"
#include "SCGDIPlus.h"

using namespace Gdiplus;

//	#ifdef _DEBUG
//	#define new DEBUG_NEW
//	#undef THIS_FILE
//	static char THIS_FILE[] = __FILE__;
//	#endif

CSCGDIPlus::CSCGDIPlus():
	m_GdiplusStartupInput(),
	m_bInitialized(FALSE),
	m_pGdiplusToken(NULL),
	m_dwRefCount(0)
{
	::InitializeCriticalSection(&m_lRefCriticalSection);
	TRACE0("CSCGDIPlus constructed\n");
}

CSCGDIPlus::~CSCGDIPlus()
{
	// Shutdown must have been called
	ASSERT(!m_bInitialized);
	::DeleteCriticalSection(&m_lRefCriticalSection);
	TRACE0("CSCGDIPlus destructed\n");
}

BOOL CSCGDIPlus::SCInitInstance()
{
	::EnterCriticalSection( &m_lRefCriticalSection );
	// Should be called once per application
	ASSERT(!m_bInitialized || (m_dwRefCount>0));

	if (0==m_dwRefCount)
	{
		Status status = GdiplusStartup(&m_pGdiplusToken, &m_GdiplusStartupInput, NULL);
		m_bInitialized = (Ok==status); 
		TRACE1("CSCGDIPlus::...GdiplusStartup, status=%d\n", m_bInitialized);
	}

	if (m_bInitialized)
		m_dwRefCount++;
	::LeaveCriticalSection( &m_lRefCriticalSection );
	return m_bInitialized;
}

BOOL CSCGDIPlus::SCExitInstance()
{
	::EnterCriticalSection( &m_lRefCriticalSection );
	ASSERT(m_bInitialized);

	if (m_bInitialized)
	{
		if (--m_dwRefCount == 0)
		{
			GdiplusShutdown(m_pGdiplusToken);
			m_bInitialized = FALSE;
			m_pGdiplusToken = NULL;
			TRACE0("CSCGDIPlus::...GdiplusShutdown\n");
		}
	}
	::LeaveCriticalSection( &m_lRefCriticalSection );

	return TRUE;
}