C / C++ / MFC

Code-o-mat wrote:

Maybe on a virtual machine, like MS's Virtual PC

#include <gdiplus.h>
...
    BITMAPINFO *pBitmapInfo = ...;
    BYTE *pBitmapPixelBits = ...;
    ULONG dwToken;
    Gdiplus::GdiplusStartupInput input;
    Gdiplus::GdiplusStartupOutput output;
    Gdiplus::Status status = Gdiplus::GdiplusStartup(&dwToken, &input, &output);
    if(status == Gdiplus::Ok)
    {
        Gdiplus::Bitmap bitmap(pBitmapInfo, pBitmapPixelBits);
        CLSID clsid;
        GetEncoderClsid(L"image/jpeg", &clsid);
        bitmap.Save(L"c:\\my.jpg", &clsid);

        Gdiplus::GdiplusShutdown(dwToken);
    }

...

// stolen from the GDI+ docs
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++