GDI+添加图片水印

(2010-08-02 09:46:05)

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标签：  杂谈

分类： GDI+

bool GetCodecClsid(LPCTSTR lpstrFormat, CLSID &clsid)

{

    UINT nNum = 0, nSize = 0;

    Gdiplus::GetImageEncodersSize(&nNum, &nSize) == Gdiplus::Ok;

    Gdiplus::ImageCodecInfo *pInfo = (Gdiplus::ImageCodecInfo *)malloc(nSize);

    if(Gdiplus::GetImageEncoders(nNum, nSize, pInfo) != Gdiplus::Ok)

    {

        free(pInfo);

    }

    LPCWSTR lpstr = lpstrFormat;

    for(int nIndex = 0; nIndex < nNum; ++nIndex)

    {

        if(wcscmp(pInfo[nIndex].MimeType, lpstr) == 0)

        {

            clsid = pInfo[nIndex].Clsid;

            return true;

        }

    }

    return false;

};

void DrawWatermark()

{

    USES_CONVERSION;

    int nPicWidth = 0;

    int nPicHeight = 0;

    ULONG_PTR m_gdiplusToken;

    Gdiplus::GdiplusStartupInput gdiplusStartupInput;

    if ( Gdiplus::GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL) != Gdiplus::Ok )

    {

        return ;

    }

    Gdiplus::Bitmap oOldBitMap(A2W("Winter.jpg"));

     printf("%d\n",oOldBitMap.GetHeight());

//新画布

    Gdiplus::Bitmap bitmap(oOldBitMap.GetWidth (), oOldBitMap.GetHeight ());

    bitmap.SetResolution (oOldBitMap.GetHorizontalResolution (), oOldBitMap.GetVerticalResolution ());

    

    Gdiplus::Graphics graphics(&bitmap);

    graphics.SetSmoothingMode (SmoothingModeAntiAlias);

    graphics.SetTextRenderingHint (TextRenderingHintAntiAlias);

    Gdiplus::Bitmap oWatermark(A2W("paipai_logo_80.png"));

   //Image oWatermark(A2W("4.jpg"));

   // Gdiplus::Bitmap oWatermark(A2W("paipai_logo.png"));

    printf("%d",oWatermark.GetHeight());

    int nLocX = 0;

    int nLocY = 0;

    int nmode = oWatermark.GetLastStatus ();

    

    // 

    graphics.DrawImage(&oOldBitMap, 0, 0, oOldBitMap.GetWidth (), oOldBitMap.GetHeight ()); 

    

    

    int nStatus = graphics.DrawImage (&oWatermark,Gdiplus::Rect(0, 0,253, 53), 0, 0, 253, 53, Gdiplus::UnitPixel);

    graphics.DrawImage (&oWatermark,253,60, 0, 0, 253, 53, Gdiplus::UnitPixel);

    graphics.DrawImage (&oWatermark,253,100, 0, 0, 253, 53, Gdiplus::UnitPixel);

//        int nStatus = graphics.DrawImage (&oWatermark,0,0);

    //oOldBitMap.Save(A2W("Winter.jpg"))

    CLSID pngclsid = {0};

    GetCodecClsid(_T("image/jpeg"), pngclsid);

//    oOldBitMap.Save(A2W("Winter1.png"), &pngclsid);

 //  oWatermark.Save(A2W("logo.png"), &pngclsid);

    delete &oOldBitMap;

    if( PathFileExists( A2W("Winter.jpg") ))

    {

        if(GetFileAttributes(A2W("Winter.jpg")) & (~FILE_ATTRIBUTE_NORMAL))

        {

            SetFileAttributes(A2W("Winter.jpg"), FILE_ATTRIBUTE_NORMAL);

        }

    if( !DeleteFile(A2W("Winter.jpg")) )

        perror( "Could not delete Winter.jpg" );

    else

        printf( "Deleted 'Winter.jpg'\n" );

    }

    bitmap.Save (A2W("Winter.jpg"), &pngclsid);

};