[Fontconfig] Pregenerate fontconfig cache

Guillermo Rodriguez Garcia guille.rodriguez at gmail.com
Wed Aug 17 09:05:25 UTC 2016


Thank you for the info.

Is there any way to tell fontconfig not to check the mtime of font directories?
Since I have full control over fonts installed in the device, and I
would be pregenerating the cache file, I would be happy to tell
fontconfig to just use the cache file without any further checks.

Other than that, is there a recommended procedure for this?
(pregenerating cache files)

Thank you,


2016-08-17 4:21 GMT+02:00 Akira TAGOH <akira at tagoh.org>:
> Fontconnfig is checking the mtime of the directories fonts installed
> to detect the changes. that message means the mtime of
> /usr/share/fonts/X11 is different where the caches originally
> generated.
> On Tue, Aug 16, 2016 at 9:13 PM, Guillermo Rodriguez Garcia
> <guille.rodriguez at gmail.com> wrote:
>> Hi all,
>> I have an embedded system where the list of fonts is known in advance
>> and cannot change. I want to pregenerate the fontconfig cache files
>> for an embedded system in order to avoid long startup times on first
>> boot.
>> I already learned that the cache files are architecture specific so
>> they need to be generated either on the target hardware or using qemu
>> or similar. What I am doing right now is:
>> - Install fonts on target system
>> - Generate cache files (fc-cache -f)
>> - Get generated cache files and add them to the build system
>> - Generate a rootfs image containing the original font files and the
>> cache files. This is the rootfs image that will be installed on the
>> target devices.
>> However when I install this rootfs image to the target system, on
>> first boot the pregenerated cache files are ignored, and the cache
>> files are regenerated again from scratch.
>> Setting FC_DEBUG=16 I see this:
>> $ fc-list
>> FC_DEBUG=16
>> FcCacheTimeValid dir "/usr/share/fonts/X11" cache checksum 1167623491
>> dir checksum 1167628683
>> Why are the checksums different? Is there a way to avoid this?
>> Thank you,
>> Guillermo Rodriguez Garcia
>> guille.rodriguez at gmail.com
>> _______________________________________________
>> Fontconfig mailing list
>> Fontconfig at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/fontconfig
> --
> Akira TAGOH

Guillermo Rodriguez Garcia
guille.rodriguez at gmail.com

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