[Fontconfig] Pregenerate fontconfig cache

[Akira TAGOH]

Unfortunately not at this moment. you may just want to install fonts
somewhere under /path/to/sysroot/ and do fc-cache -y /path/to/sysroot
and save the mtime there when creating an image.

On Wed, Aug 17, 2016 at 6:05 PM, Guillermo Rodriguez Garcia
<guille.rodriguez at gmail.com> wrote:
> Hello,
>
> 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,
>
> Guillermo
>
> 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



-- 
Akira TAGOH