sending QImage over serial port

[yagabey]

Hello, i am trying to send a QImage file over serial port; but i couldn't manage it..
There is no data sent in serial port monitor, when i send the file "avatar.gif"..(with send function of Qextserialport)
Am i missing something...

here is my code:


QByteArray bytes;

QImage picture(80, 80,QImage::Format_RGB32);

QImageReader reader("C:/Documents and Settings/pc/MyDocuments/Visual Studio 2005/Projects/videocapture3/avatar.gif");

reader.read(&picture);

picture.loadFromData(bytes);

sp->send(bytes.size(),bytes.data());

[jacek]

Where do you fill "bytes" with data?

[yagabey]

Ok.. I havent used QImage or QImagereader before; and perhaps I misunderstand them...

Hello, i am trying to send a QImage file over serial port; but i couldn't manage it..
There is no data sent in serial port monitor, when i send the file "avatar.gif"..(with send function of Qextserialport)
Am i missing something...

What i understand is that:


QByteArray bytes;// a bytes array formed

QImage picture(80, 80,QImage::Format_RGB32); // a picture object formed

QImageReader reader("C:/Documents and Settings/pc/MyDocuments/Visual Studio 2005/Projects/videocapture3/avatar.gif"); //avatar.gif is read into "reader"

reader.read(&picture); // reads the image from reade into picture..

picture.loadFromData(bytes); // bytes are filled here

sp->send(bytes.size(),bytes.data());// bytes are sent here


is that wrong?

[jacek]

picture.loadFromData(bytes); // bytes are filled here
On the contrary, you load data from bytes into picture. You can access image data using QImage::bits().

What format do you need to send that image in?

[yagabey]

I need te send it as it is.. I wont change the format while sending..
I checked QImage::bits; it returns a uchar pointer. How to fill the bytes with that?

[jacek]

I need te send it as it is.. I wont change the format while sending..
Then you don't need QImage, but QFile::readAll().


I checked QImage::bits; it returns a uchar pointer. How to fill the bytes with that?
Using proper QByteArray constructor.