[Marble-devel] Review Request 114626: Simplify FileLoader: No automatic cache file creation

[Dennis Nienhüser]

> On Dec. 25, 2013, 1:45 p.m., Bernhard Beschow wrote:
> > Where are the .cache files linked in the .dgml files generated? I think this should be done automatically when compiling Marble using the new tool.

That's not done currently, just like before. Automatic creation could be done in the future, but I'd split that from this change.


- Dennis


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On Dec. 22, 2013, 10:34 p.m., Dennis Nienhüser wrote:
> 
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> https://git.reviewboard.kde.org/r/114626/
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> 
> (Updated Dec. 22, 2013, 10:34 p.m.)
> 
> 
> Review request for Marble.
> 
> 
> Repository: marble
> 
> 
> Description
> -------
> 
> FileLoader has the ability to cache .kml files in a binary format to speed up subsequent loading of files. The current implementation has some serious limitations though:
> - does not check the format, would cache every file format
> - supports a very limited subset of the KML structure only (a tree of placemarks)
> - assumes files have unique filenames
> - loads nothing if .cache file is older than original
> 
> The behavior is only sane because the auto caching is limited to relative file names. In the Marble applications this equals files loaded from .dgml map themes. Not sure what happens if 3rd party applications use FileLoader with relative filenames though.
> 
> On my system no .cache file has been created automatically ever (despite me having installed nearly every map theme around). This is probably because we ship the ones used mostly anyway. Therefore I'd like to simplify things:
> - map themes who want to load .kml files quickly should specify/ship .cache files directly
> - .cache files can be created with tools/kml2cache easily
> - the old behavior (open .cache instead of .kml for relative files, if exists) is kept for backward compatibility
> The patch implements this.
> 
> 
> Diffs
> -----
> 
>   data/maps/earth/bluemarble/bluemarble.dgml 4e40406 
>   data/maps/earth/citylights/citylights.dgml b6ea048 
>   data/maps/earth/openstreetmap/openstreetmap.dgml db29b35 
>   data/maps/earth/plain/plain.dgml 7fbef91 
>   data/maps/earth/precip-dec/precip-dec.dgml 6b6147b 
>   data/maps/earth/precip-july/precip-july.dgml ad46862 
>   data/maps/earth/schagen1689/schagen1689.dgml b433524 
>   data/maps/earth/srtm/srtm.dgml 5eff3eb 
>   data/maps/earth/temp-dec/temp-dec.dgml bae873e 
>   data/maps/earth/temp-july/temp-july.dgml 63afcbf 
>   data/maps/moon/clementine/clementine.dgml fc95218 
>   src/lib/marble/FileLoader.cpp db76ad9 
>   tools/CMakeLists.txt 5fe0f92 
>   tools/kml2cache/CMakeLists.txt PRE-CREATION 
>   tools/kml2cache/kml2cache.cpp PRE-CREATION 
> 
> Diff: https://git.reviewboard.kde.org/r/114626/diff/
> 
> 
> Testing
> -------
> 
> Compared md5sum of existing .cache files and .cache files created by kml2cache from existing .kml files in placemarks/. They're all identical except for cityplacemarks.{kml/cache}. I guess the cityplacemarks cache file is out of sync and needs to be fixed independently of this patch.
> 
> 
> Thanks,
> 
> Dennis Nienhüser
> 
>

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