prpreviewutils.cpp

虚拟打印机

/* 
 * prpreviewutils.cpp
 *
    Copyright (C) 2006 Michael H. Overlin

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   
   Contact at [e-mail]

 */

#include "prpreviewutils.h"

#include "..\lib\devmode.h"
#include "..\lib\mathutils.h"
#include "..\lib\spoolutils.h"
#include "..\lib\utils.h"

#include <windows.h>



// ****************************************************************************************************
// **  class DevModeKeeper  ***************************************************************************
// ****************************************************************************************************

DevModeKeeper::DevModeKeeper(const DevModeKeeper& dmk) {
	*this = dmk;
	//m_pdm = ::DM_Duplicate(dmk.m_pdm);
	//m_tstrPrinterName = dmk.m_tstrPrinterName;
}

DevModeKeeper::DevModeKeeper(void) {
	m_pdm = NULL;
}

DevModeKeeper::~DevModeKeeper() {
	if (m_pdm != NULL) {
		free(m_pdm);
	}
}

::PDEVMODE DevModeKeeper::GetDevMode(const tstring &tstrPrinterName) {
	if (tstrPrinterName != m_tstrPrinterName) {
		m_tstrPrinterName = tstrPrinterName;

		if (m_pdm != NULL) {
			free(m_pdm);
			m_pdm = NULL;
		}

		HANDLE hPrinter = NULL;
		BOOL b = ::OpenPrinter( const_cast<LPTSTR>(m_tstrPrinterName.c_str()), &hPrinter, NULL);
		if (b) {
			DWORD dwcBuff= ::DocumentProperties(NULL, hPrinter, const_cast<LPTSTR>(m_tstrPrinterName.c_str()), NULL, NULL, 0);
			m_pdm = (PDEVMODE) malloc(dwcBuff);
			::DocumentProperties(NULL, hPrinter, const_cast<LPTSTR>(m_tstrPrinterName.c_str()), m_pdm, m_pdm, DM_OUT_BUFFER);
			::ClosePrinter(hPrinter);
		}
	}
	return m_pdm;
}

BOOL DevModeKeeper::SetDevMode(void) {
	ASSERT(m_pdm != NULL);

	LONG lresult = ::DoDocumentProperties(
		NULL, const_cast<LPTSTR>(m_tstrPrinterName.c_str()), m_pdm,	DM_IN_BUFFER | DM_OUT_BUFFER);
	
	BOOL bRetValue = (lresult >= 0);
	
	//BOOL bRetValue = FALSE;
	//HANDLE hPrinter = NULL;
	//BOOL b = ::OpenPrinter(const_cast<LPTSTR>(m_tstrPrinterName.c_str()), &hPrinter, NULL);
	//if (b) {
	//	LONG lresult = ::DocumentProperties(
	//		NULL, hPrinter, const_cast<LPTSTR>(m_tstrPrinterName.c_str()), m_pdm, m_pdm, DM_IN_BUFFER | DM_OUT_BUFFER);

	//	bRetValue = (lresult >= 0);
	//	::ClosePrinter(hPrinter);
	//}
	return bRetValue;
}

DevModeKeeper& DevModeKeeper::operator =(const DevModeKeeper& dmk) {
	m_pdm = ( (dmk.m_pdm != NULL) ? ::DM_Duplicate(dmk.m_pdm) : NULL );
	m_tstrPrinterName = dmk.m_tstrPrinterName;
	return *this;
}


// **********************************************************************************
// **  MODULE PUBLIC ROUTINES  ******************************************************
// **********************************************************************************

BOOL GetEnhMetafileFrame_Inches(OUT RECTD& rd, IN HENHMETAFILE hMeta) {
	BOOL bRetValue = FALSE;
	::ENHMETAHEADER enhMetaHeader;
	if (::GetEnhMetaFileHeader(hMeta, sizeof(enhMetaHeader), &enhMetaHeader) != 0) {
		rd.left = enhMetaHeader.rclFrame.left * INCHES_PER_MM / 100.0;
		rd.top = enhMetaHeader.rclFrame.top * INCHES_PER_MM / 100.0;
		rd.right = enhMetaHeader.rclFrame.right * INCHES_PER_MM / 100.0;
		rd.bottom = enhMetaHeader.rclFrame.bottom * INCHES_PER_MM / 100.0;
		bRetValue = TRUE;
	}
	return bRetValue;
}