[Xmlgraphics-fop Wiki] Update of "AreaTreeIntermediateXml" by JeremiasMaerki

[Apache Wiki <wi...@apache.org>]

Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Xmlgraphics-fop Wiki" for change notification.

The following page has been changed by JeremiasMaerki:
http://wiki.apache.org/xmlgraphics-fop/AreaTreeIntermediateXml

The comment on the change is:
Some notes along the way...

------------------------------------------------------------------------------
  
   * Someone could come up with a FOP extension which includes an intermediate format XML file which could automatically be included at a certain point while rendering the main document (Document insertion). If someone implements PDF parsing, the same could be done for PDF.
  
+ = Coding log =
+ 
+  * Trying to reactivate the CachedRenderPagesModel shows several problems with the current area tree: Instances of ColorTypeProperty and Font, for example are not serializable. Being a Serializable is not a strict requirement for implementing the intermediate format but it shows problem spots on the way to a fully reloadable area tree.
+  * Font is a special problem: It uses the internal key ("F1", "F2" etc.) to point to the right font. For the area tree, this should be reworked to contain the info on the exact font used during layout. The renderer will have to lookup the font once more to get at the font metrics if it needs them. If a serialized area tree is deserialized later, we need to be able to find out if a font is suddenly not available anymore. We shouldn't do any font substitution anymore in this case.
+ 

---------------------------------------------------------------------
To unsubscribe, e-mail: fop-commits-unsubscribe@xmlgraphics.apache.org
For additional commands, e-mail: fop-commits-help@xmlgraphics.apache.org