[xep-support] Scaling external-graphic with XEP 3.7.5

[Nikolai Grigoriev]

Michael,

> XEP handles the format fine (for the most part), but scaling is 
> unpredictable, even (or particularly) using width="auto" 
> height="auto" content-width="auto" content-height="auto".  

In this case, XEP should display the image using its intrinsic
size. The size itself may depend on the resolution specified 
in the image; so it is hard to say anything without looking 
at the images themselves.

> What I am trying to do is scale down large images to fit 
> within the width of my page, and keep small images their 
> original size (or a reasonable size) - strangely I seem 
> to be having more problems with small images scaling 
> too large rather than vice-versa.

A typical way of doing it:

<fo:external-graphic src="url(...)"
  content-width="scale-to-fit" width="100%"
  content-height="100%"/>

This will leave images at their natural size, unless 
their width exceeds the page width; in which case 
they will be scaled down to the available space.

Regards,
Nikolai Grigoriev
RenderX

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