Huawei themes broken after data format in TWRP

[Guest astandet]

Hi. When rooting Huawei Mate 8 I had to use "format data" option to remove encryption (it wouldn't take my PIN). Then I flashed magisk and when I rebooted back to system, I found out that there's only 1 basic theme available, HWthemes folder empty, downloaded themes not working (despite "theme applied" notification, not even after reboot). My goldmagazine theme is gone, and the setting "Homescreen style" shows a placeholder drawing where normally my theme picture would show. Does anybody have experience with this sort of special effect? What am I supposed to do to bring my themes back?

[Guest adeii]

If you have EMUI 5 your themes must be in  /internal_sd/Hwthemes ? Do you have subfolder .cache or .themecache in it which may reserved your theme?

TWRP format data, also wipe /internal_sd since its truly path is /data/media/0, I guess. On the other hand, TWRP backup exclude /internal_sd (or /sdcard as it said) by /data backup.

For factory themes, you can extract them from downloaded stock rom..or use this app.

[Guest astandet]

Hi. Thanks for your response. It's EMUI 4.0, Android 6.0 (I should have mentioned that); .cache, .themecache or any other dotted files are missing in /data/media/0 . In fact, the entire hwthemes folder is missing, the only one I have is on external sd card, where downloaded themes went (they don't work - should I move them to internal_sd?). The mentioned app is incompatible. Besides, I'd rather not use an app for that. I've got stock zip. How would you go about extracting themes from it?

Edit: Extracting .img files with ext4_unpacker fails with "unknown data format". I'll address it when I have time, but it's not a priority since everything else works fine.

Edited July 4, 2019 by astandet
more detail

[Guest adeii]

On 7/4/2019 at 8:15 AM, astandet said:

How would you go about extracting themes from it?

1 - From stock-rom.zip, extract update.app.

2 - With HuaweiUpdateExtractor, extract cust.img, userdata.img, cache.img, product.img, vendor.img ... Uncheck "verify file/header checksum" if needed.

3 - With SIMG2IMG, convert every extracted image...exp. simg2img cust.img cust2.img.

4 - Mount/unpack converted images to find /data/media/0/Hwthemes folder or similar....exp. with DiskInternals LinuxReader.

simg2img.zip

Edited July 7, 2019 by adeii

[Guest astandet]

That's it, simg2img does the trick, thanks!