It does have both jpg extensions on my machine. What is different about the training machines?

File: Q3GUI/ExportImageDlg.cpp:

ExportImageDlg::ExportImageDlg(QWidget* parent,
                               const char* name, bool modal)
        : Q3FileDialog(parent, name, modal),
          _dir(""),
          ... ... ...
{
   ... ... ...

   // Add all the supported image types to the file filter.
   char (*imgFormat)(NULL);
   int selectedFilter(0);

   QList imgFormatList (QImageWriter::supportedImageFormats());
   for (int i = 0; i < imgFormatList.size(); ++i)
   {
      imgFormat = imgFormatList[i].data();

      QString filterString;
      filterString.sprintf("%s Image (*.%s)", imgFormat,
                           QString(imgFormat).lower().latin1());

      if (imgFormat == _format)
         selectedFilter = i;

      // The first item must be added with setFilters() to clear the filters
      // and tell the dialog that other filters may be added
      if (i == 0)
      {
         setFilters(filterString);
      }
      else
      {
         addFilter(filterString);
      }
   }
   // Set the static default filter
   setSelectedFilter(selectedFilter);

   ... ... ...
}

QImageWriter supportedImageFormats only sometimes includes JPEG. Why?

On some of our installations built with Qt 4.3.3, users are seeing the results of QImageWriter::supportedImageFormats to be only these items -- and this is a problem for us:

• bmp Image (*.bmp)
• png Image (*.png)
• ppm Image (*.ppm)
• xbm Image (*.xbm)
• xpm Image (*.xpm)

On other installations, the following items are also shown:

• jpeg Image (*.jpeg)
• jpg Image (*.jpg)

Why might this be? And how can we make the JPEG options show up on all installations?

Message URL:
http://www.qtcentre.org/forum/f-qt-programming-2/t-qimagewriter-supportedimageformats-only-sometimes-includes-jpeg-why-17633.html