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PdfFontFactory.h
/***************************************************************************
 *   Copyright (C) 2007 by Dominik Seichter                                *
 *   domseichter@web.de                                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Library 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 Library 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.             *
 ***************************************************************************/

#ifndef _PDF_FONT_FACTORY_H_
#define _PDF_FONT_FACTORY_H_

#include "podofo/base/PdfDefines.h"
#include "PdfFont.h"

namespace PoDoFo {

class PdfFontMetrics;
class PdfVecObjects;

enum EPdfFontFlags {
    ePdfFont_Normal     = 0x00,
    ePdfFont_Embedded   = 0x01,
    ePdfFont_Bold       = 0x02,
    ePdfFont_Italic     = 0x04,
    ePdfFont_BoldItalic = ePdfFont_Bold | ePdfFont_Italic,
    ePdfFont_Subsetting = 0x08
};

/** This is a factory class which knows
 *  which implementation of PdfFont is required
 *  for a certain font type with certain features (like encoding).
 */
00045 class PODOFO_DOC_API PdfFontFactory {
 public:

    /** Create a new PdfFont object.
     *
     *  \param pMetrics pointer to a font metrics object. The font in the PDF
     *         file will match this fontmetrics object. The metrics object is 
     *         deleted along with the created font. In case of an error, it is deleted
     *         here.
     *  \param nFlags font flags or'ed together, specifying the font style and if it should be embedded
     *  \param pEncoding the encoding of this font.
     *  \param pParent the parent of the created font.
     *
     *  \returns a new PdfFont object or NULL
     */
    static PdfFont* CreateFontObject( PdfFontMetrics* pMetrics, int nFlags, 
                                      const PdfEncoding* const pEncoding, PdfVecObjects* pParent );

    /** Create a new PdfFont from an existing
     *  font in a PDF file.
     *
     *  \param pLibrary handle to the FreeType library, so that a PdfFontMetrics
     *         can be constructed for this font
     *  \param pObject a PDF font object
     */
    static PdfFont* CreateFont( FT_Library* pLibrary, PdfObject* pObject );

//    static PdfFont* CreateBase14Font(const char* pszFontName, const PdfEncoding * const pEncoding,PdfVecObjects *pvecObjects);

    /** Try to guess the fonttype from a the filename of a font file.
     * 
     *  \param pszFilename filename of a fontfile
     *  \returns the font type
     */
    static EPdfFontType GetFontType( const char* pszFilename );

 private:
    /** Actually creates the font object for the requested type.
     *  Throws an exception in case of an error.
     *
     *  \returns a new PdfFont object or NULL
     */
    static PdfFont* CreateFontForType( EPdfFontType eType, PdfFontMetrics* pMetrics, 
                                       const PdfEncoding* const pEncoding, 
                                       bool bEmbed, bool bSubsetting, PdfVecObjects* pParent );

};

};

#endif /* _PDF_FONT_FACTORY_H_ */



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