Load image once if opened in multiple tabs to save memory

[BloodySword]

Hi Pierre,

I have noticed that an image is loaded multiple times into memory when it's opened in multiple tabs with different zoom factors or viewport positions. Sometimes for a User this can be beneficial. But loading the bitmap more than once instead of referencing the same image data for the other tabs is a bit inefficient.

Is there a chance that you could look into this feature? You could hash the metadata to very quickly identify that it is the same image without much CPU cost.

This is low priority of course but I think it would be a nice feature.

Best regards,
Kyo