C / C++ / MFC

santhoshv84 wrote:

BOOL CDialog::OnEraseBkgnd(CDC* pDC)
{
// TODO: Add your message handler code here and/or call default

return CDialog::OnEraseBkgnd(pDC);
}

#include <atlimage.h>
...
// (error handling omitted)
CImage image;
image.Load(_T("c:\\some.jpg"));
image.Save(_T("c:\\some.bmp"), ImageFormatBMP);

Mark Salsbery
Microsoft MVP - Visual C++

V_shr wrote:

CImage is a new class included with VC7 i think, but i dont use VisualStudio.NET

    ULONG dwToken;
    Gdiplus::GdiplusStartupInput input;
    Gdiplus::GdiplusStartupOutput output;
    Gdiplus::Status status = Gdiplus::GdiplusStartup(&dwToken, &input, &output);
    if(status == Gdiplus::Ok)
    {
        Gdiplus::Bitmap *pBitmap = new Gdiplus::Bitmap(L"c:\\some.jpg", FALSE);
        CLSID bmpClsid;
        GetEncoderClsid(L"image/bmp", &bmpClsid);
        pBitmap->Save(L"c:\\some.bmp", &bmpClsid);
        delete pBitmap;

        Gdiplus::GdiplusShutdown(dwToken);
    }

int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
{
    UINT  num = 0;          // number of image encoders
    UINT  size = 0;         // size of the image encoder array in bytes

    ImageCodecInfo* pImageCodecInfo = NULL;

    GetImageEncodersSize(&num, &size);
    if(size == 0)
        return -1;  // Failure

    pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
    if(pImageCodecInfo == NULL)
        return -1;  // Failure

    GetImageEncoders(num, size, pImageCodecInfo);

    for(UINT j = 0; j < num; ++j)
    {
        if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
        {
            *pClsid = pImageCodecInfo[j].Clsid;
            free(pImageCodecInfo);
            return j;  // Success
        }    
    }

    free(pImageCodecInfo);
    return -1;  // Failure
}

Mark Salsbery
Microsoft MVP - Visual C++

std::string pch;
std::string sEnglish;

...
...

if(!pch.empty() || !sEnglish.empty())
   sEnglish += pch;

Gofur Halmuratov wrote:

but i am wondering
why strcat function fails when both of input parameters are NULL?

Mark Salsbery
Microsoft MVP - Visual C++

Gofur Halmuratov wrote:

how do we know that is pch is ""? or not?

Mark Salsbery
Microsoft MVP - Visual C++