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());

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());

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[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

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

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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.