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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