General/PngImage.h

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/*
 * CC PDF Converter: Windows PDF Printer with Creative Commons license support
 * Excel to PDF Converter: Excel PDF printing addin, keeping hyperlinks AND Creative Commons license support
 * Copyright (C) 2007-2010 Guy Hachlili <[email protected]>, Cogniview LTD.
 * 
 * This file is part of CC PDF Converter / Excel to PDF Converter
 * 
 * CC PDF Converter and Excel to PDF Converter are free software;
 * you can redistribute them and/or modify them 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.
 * 
 * CC PDF Converter and Excel to PDF Converter are is distributed in the hope 
 * that they 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, see <http://www.gnu.org/licenses/>. * 
 */

#ifndef _PNGIMAGE_H_
#define _PNGIMAGE_H_

#include <png.h> 

class PngImage
{
public:
        // Ctors/Dtor
        PngImage();
        PngImage(LPCTSTR lpFilename, bool bForce8Bit = true);
        PngImage(UINT uResourceID, bool bForce8Bit = true, HMODULE hModule = NULL, LPCTSTR lpType = _T("PNG"));
        ~PngImage() {clear();};

protected:
        // Members
        int         m_nWidth;
        int         m_nHeight;
        BYTE*           m_pData;
        int                     m_nBitsPerPixel;
        int                     m_nBytesPerRow;

public:
        // Data Access
        const BYTE*     GetBits() const {return m_pData;};
        int                     GetWidth() const {return m_nWidth;};
        int                     GetHeight() const {return m_nHeight;};
        int                     GetBitsPerPixel() const {return m_nBitsPerPixel;};
        int                     GetWidthInBytes() const {return m_nBytesPerRow;};

public:
        bool            LoadFromFile(LPCTSTR lpFilename, bool bForce8Bit = true, bool bLeaveGray = false);
        bool            LoadFromResource(UINT uResourceID, bool bForce8Bit = true, HMODULE hModule = NULL, LPCTSTR lpType = _T("PNG"), bool bLeaveGray = false);
        bool            LoadFromBuffer(const char* pBuffer, DWORD dwLen, bool bForce8Bit = true, bool bLeaveGray = false);

        void            clear();

        HBITMAP         ToBitmap(HDC hDC);

protected:
        static void PNGAPI StaticRead(png_structp pPng, png_bytep pBuffer, png_size_t nSize);
};

#endif   //#define _PNGIMAGE_H_

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