Loading corrupt jpeg images with QImage

**wysota** · 2nd April 2009, 23:10

You can report it of course it would be worth to check first if libjpeg has any means of notifying about such corruption. If not, Trolls won't be able to do anything about it other than patching libjpeg which is doubtful they would do.

**mikeee7** · 3rd April 2009, 12:07

Thanks for your help!

I reported the problem in the Qt tasktracker.

**wysota** · 3rd April 2009, 13:38

Did you check if libjpeg is able to report such errors?

**mikeee7** · 3rd April 2009, 19:46

libjpeg provides very detailed status codes, see http://libjpeg.cvs.sourceforge.net/v....h?view=markup. However, qjpeghandler.cpp does not seem to check them. The corresponding function is

Qt Code:

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static bool read_jpeg_image(QIODevice *device, QImage *outImage, const QByteArray &parameters, QSize scaledSize, int inQuality )

static bool read_jpeg_image(QIODevice *device, QImage *outImage, const QByteArray &parameters, QSize scaledSize, int inQuality )

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Also, it seems that the interface provided by QImageIOHandler would need to be extended to be able to forward additional "status messages" since currently the read() and canRead() methods only return boolean values.

**talk2amulya** · 3rd April 2009, 19:57

i always wanted to find a proper bug in Qt..it always seemed so perfect and foolproof..and here we are..good work miky

**mikeee7** · 17th April 2009, 16:21

The problem discussed can now be found in the tasktracker:
http://www.qtsoftware.com/developer/...ntry&id=251514

**luisfmss** · 3rd December 2010, 01:59

I'm facing the same issue, and no solutions has been reported on the Bug Tracker.
How did you solve it? Have you found a way to detect the corrupted images?
Thanks