Mirrors/MeshCore-Solo
1
0
Fork 0
mirror of https://github.com/MarekZegare4/MeshCore-Solo.git synced 2026-07-26 14:58:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

fix(eink): render Lemon font UTF-8 correctly by bypassing GFX write()

Browse Source 
Adafruit GFX write(uint8_t) treats each byte as a glyph index and cannot
decode multi-byte UTF-8 sequences, so Cyrillic and other non-ASCII chars
were rendered as garbage even with the Lemon font selected.

Add decodeUtf8 + drawLemonChar + lemonXAdvance to GxEPDDisplay, mirroring
the existing SH1106Display implementation. Override print() for Lemon mode
to decode UTF-8 codepoints and draw each glyph directly; override
getTextWidth() to sum per-codepoint advances.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-05-24 16:39:41 +02:00
parent 5fde79fae7
commit 9c03e9a2db
2 changed files with 102 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/helpers/ui/GxEPDDisplay.h
View File

@@ -54,9 +54,13 @@ class GxEPDDisplay : public DisplayDriver {
CRC32 display_crc;
int last_display_crc_value = 0;
int _text_sz = 1;
uint8_t _full_refresh_interval = 0; // 0=never, N=full refresh every N partial refreshes
uint8_t _full_refresh_interval = 0;
uint8_t _partial_count = 0;
static uint32_t decodeUtf8(const uint8_t*& p);
int16_t drawLemonChar(int16_t x, int16_t y, uint32_t cp);
uint8_t lemonXAdvance(uint32_t cp);
public:
#if defined(EINK_DISPLAY_MODEL)
GxEPDDisplay() : DisplayDriver(EINK_DISP_W, EINK_DISP_H),