Custom options from Qml Image to a custom ImageFormat

Jerome.D

Hi

I am developing a custom QImageIOHandler (into a QImageIOPlugin) for a specific need. This new imageformat will need an encrytion key. I imagine i can use ImageOption (with a custom enum) and set in the QVariant my encryption key.

But i want to use that new imageformat easily from Qml. Like this:

Image {
    source: "file:///myfolder/myimage.mynewextension"
    *key: "xxxxxxxxxxxxxxxxxx"*
}

What solutions do i have? Is there a way to access the option list which will be passed to the ImageHandler ?
I wonder also about subclassing QQuickImage but i think that it is not public...

Thank you,
Jérôme.

fcarney

Does the handler/plugin allow you to open the file using the url?
If this is true then you could embed the key in the url.
Also, embedding the key in qml or c++ will make it trivial to read the key. You could also read the key in memory if stored in memory. If someone really wants the data they can get it.

Jerome.D

Thank you for your answer.
Unfortunatly the url is open before reaching the ImageHandler. And the ImageHandler must work directly with a QIODevice.

fcarney

Another route is creating a custom image provider. With that you choose how to interpret the end of the url. The data will be provided to the Image item via a handler.