[Kde-imaging] Manipulating image data from within a KIPI plugin

[Aurélien Gâteau]

Hello,

One user of Gwenview wanted to implement hot-pixel removing in Gwenview. I 
told him it would be nice to write this as a KIPI plugin, but he would like 
(and I agree with him) to work directly on the image data rather than on an 
image file.
This made me think we should add a way for the host app to let the plugin 
access the image data. I imagine something like this:

class Interface {
  QImage& image();

  // Dirty property used by the plugin to let the host app knows it
  // modified the image data
  void setImageDirty();
  bool isImageDirty() const;
}

The only problem I see is that I'm not sure every app uses QImage to store the 
loaded image. What do you think about this? 

Aurélien