[reportlab-users] How could I do this? inline images with relative widths

[Roberto Alsina]

In rst2pdf I have a MyImage flowable, which is just like Image, but support 
widths like "50%" by calculating the width during wrap(), when they know the 
size of their container.

However, that doesn't work for images in paragraphs (using <img>) because then 
I don't have an image flowable (which I could replace with MyImage), but just 
a tag.

I am thinking about how to hack around this and am drawing a blank here. Any 
ideas?