gdiplus 水印_GDI+添加图片水印

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);

};