[Interest] Disabling RAS image support.

[Philipp Menke]

I'm dealing with QTcpSockets right now, but with other Data. During the 
development I found this:

http://developer.qt.nokia.com/doc/qt-4.8/datastreamformat.html

----->
QImage    If the image is null a "null image" marker is saved; otherwise 
the image is saved in PNG or BMP format (depending on the stream 
version). If you want control of the format, stream the image into a 
QBuffer (using QImageIO) and stream that.
<-----


I'm not sure if it can help you^^

Philipp

Am 26.02.2012 16:44, schrieb Jason Cipriani:
> I have an application (Qt 4.7.4) that reads QImages from a QDataStream 
> backed by a QTcpSocket.
>
> Each time it reads an image it prints "Reading ras files from 
> sequential devices not supported" to stderr.
>
> A Google search reveals a code snippet from KDE ras handlers at 
> http://www.oschina.net/code/explore/kde-4.5.4/kdelibs-4.5.4/kimgio/ras.cpp, 
> lines 217 - 227 read:
>
> 217 bool RASHandler::canRead(QIODevice *device)
> 218 {
> 219    if (!device) {
> 220        qWarning("RASHandler::canRead() called with no device");
> 221        return false;
> 222    }
> 223
> 224    if (device->isSequential()) {
> 225        qWarning("Reading ras files from sequential devices not 
> supported");
> 226        return false;
> 227        }
>
> I'm not familiar with the Qt but I presume it runs through handler 
> canRead()'s when attempting to guess the image data format. It's 
> bothersome that whoever wrote that bit of code deemed that message 
> worthy of a qWarning.
>
> Anyways, I'd like to not have this message show up. It's causing a lot 
> of clutter in my logs.
>
> Is there any way to programmatically disable support for ras images in 
> Qt? (I say programmatically because I don't know anything about Qt 
> image drivers, so I'm not sure if this support is dependent on 
> libraries installed on the user's machine, and if it is, uninstalling 
> them is not an option).
>
> Alternatively, what is the format of a QImage in a QDataStream 
> (QDataStream::Qt_4_7)? Can I somehow explicitly tell Qt which format 
> to use instead of having it guess?
>
> If I can't disable ras support somehow, my other option is to filter 
> out that specific log message in my message handler, but I'd rather 
> not take that path if I can help it.
>
> Thanks!
> Jason
>
>
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