cottongin 7f51b274c4 feat: replace JPEGDEC with stb_image for robust JPEG decoding ...

JPEGDEC (error 3: UNSUPPORTED_FEATURE) and M5GFX's TJpgDec both failed
on ~70% of Immich preview images due to:
- Optimized Huffman tables exceeding 12-bit DC code limit
- Extended sequential mode (SOF1) misidentified as baseline
- Progressive JPEG not handled by either decoder

stb_image.h handles all standard JPEG modes (baseline, progressive,
extended sequential, arbitrary Huffman tables) in a single decoder.

Changes:
- Add vendored stb_image.h (JPEG-only, PSRAM allocator)
- Rewrite decodeAndFit() to use stbi_load_from_memory()
- Remove JPEGDEC library dependency
- Remove jpegDrawCallback, DecodeContext, parseJpegHeader,
  decodeFallbackLGFX (all obsolete)
- Flash usage decreased: 1345KB -> 1317KB

Co-authored-by: Cursor <cursoragent@cursor.com>

2026-08-03 20:22:06 -04:00

data

fix: eliminate diagonal dither pattern from display driver

2026-08-03 19:52:22 -04:00

src

feat: replace JPEGDEC with stb_image for robust JPEG decoding

2026-08-03 20:22:06 -04:00

test

fix: eliminate diagonal dither pattern from display driver

2026-08-03 19:52:22 -04:00

.gitignore

chore: add .gitignore for build artifacts

2026-08-03 10:47:43 -04:00

partitions_custom.csv

fix: LittleFS partition label mismatch and display rotation (180°)

2026-08-03 11:12:34 -04:00

platformio.ini

feat: replace JPEGDEC with stb_image for robust JPEG decoding

2026-08-03 20:22:06 -04:00

Description

Custom ESP32 firmware for the M5Stack PaperColor connecting it to Immich for slideshow usage

MIT 2.3 MiB

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