jpirnay
49b039a775
Two related bugs in fontconvert_sdcard.py:
1. SMP filter for ligatures was post-pack, which only checked the
already-masked low half (always ≤ 0xFFFF), didn't check `lc`, and
couldn't catch SMP cps that already had bits truncated by the
mask. Filter at source instead — inside extract_ligatures_fonttools
when building the `filtered` dict — so any seq with an SMP
component or any lig_cp > 0xFFFF is dropped before packing. The
chained 3+ char path is naturally covered because
`intermediate_cp = filtered[prefix].lig_cp` reads from the same
already-filtered table.
2. GPOS kern dispatch checked `actual.LookupType` after unwrapping an
Extension subtable. Format-specific subtables (PairPosFormat1/2)
don't carry `LookupType`, so this fails for any Extension-wrapped
PairPos lookup — i.e. how every modern font (Inter, Source Serif,
Bitter, …) ships kern. Use the effective type instead:
effective_type = getattr(st, "ExtensionLookupType", lookup.LookupType)
so non-Extension lookups read the outer type and Extension lookups
read the inner ExtensionLookupType, and Type-2 PairPos lookups
actually reach _extract_pairpos_subtable in either case.
CrossPoint Reader ++
This firmware is based on the crosspoint-reader for the XTEINK X4, a great piece of software by Dave Allie and others
Why this fork
Unfortunately the official repository suffers from too many good ideas floating around and a lack of clear governance how to deal with these contributions, so it's lacking fundamental fixes for a proper reading experience (rendering issues, sub-par sync capabilities with KOReader, a popular multi-platform open-source epub reader).
Trying to contribute enhancements / fixes became increasingly difficult as the lack of progress effectively prevented further development.
Therefore this branch focuses on real fixes and real improvements while trying to keep up to pace with developments in the main branch.
What's different
- Proper KOReader Snychronisation (including https TLS OOM fix)
- Fixes for a lot of css rendering issues
- Additional sleep screens support (information overlay, transparent pictures over current reader screen)
- Clock-Support
- Weather information panel
- Multiple under-the-hood performance improvements
- Book information screen
- Markdown-support
- WiFi captive portal support
- Supporting
strikethrough(*) and tables - Support for used defined actions on double-click / long-click per button (*)
- User defined fonts
- ...
Choosing the right reader...
Your usecase might be completely different from mine, so I try to give an overview of the different reader flavors to my best knowledge. If you know of more variants / have more information, then let me know
Last update: April, 12th, 2026
| Reader | Visual appeal | Functionality | Formats | Pros | Cons | Custom fonts | CJK | Bluetooth |
|---|---|---|---|---|---|---|---|---|
| Stock | Okay | Reader | XTC, EPUB, TXT | Frequent official updates | Lot of rendering issues | Yes | Yes | Yes |
| THIS FORK: CrossPoint ++ | Okay | Calibre Wireless support; Proper KOReader progress sync; Wi-Fi transfer; Book Info; Clock, Weather Info | EPUB, XTC, TXT, MD | Faster integration of functionality | Small team | Yes | Limited | No |
| CrossPoint | Okay | Calibre Wireless support; KOReader progress sync; Wi-Fi transfer | EPUB, XTC, TXT | Biggest community | Least common denominator approach | No | No | No |
| CrossPet | Excellent, Playful | Virtual pet motivator; mini-games | EPUB, TXT | A lot of additional apps | Higher battery drain, Small team, bloaty | Yes | Yes | Yes |
| Papyrix | Minimalist | Calibre Wireless support; exFAT support | EPUB, FB2, MD, TXT | A lot of good ideas | Small team | Yes | Yes | No |
| Inx | Nice | mainly crosspoint functionality plus reading statistics | EPUB, XTC, TXT | Good reading stats | Small team | No | No | No |
| vCodex | Nice | mainly crosspoint functionality plus reading statistics | EPUB, XTC, TXT | Good reading stats | Small team | No | No | No |
| PlusPoint | Okay | Experimental | EPUB, TXT, JS Apps | Support for custom JS apps; better RTC | Based on older code, small team | Yes | Yes | No |
| SUMI | Nice | Lua custom apps; Bluetooth keyboard support for notes; Game Boy emulator; Bluetooth Transfer | EPUB, TXT, XTC, MD | Many apps, customizable, Papyrix fork | Single Contributor, No Wi-Fi | Yes | Yes | Yes |
| CrossInk | Okay | Calibre Wireless support; KOReader progress sync; Wi-Fi transfer | EPUB, XTC, TXT | One of the best alternatives | Small team | No | No | No |