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feat: replace JPEGDEC with stb_image for robust JPEG decoding

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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>
This commit is contained in:
cottongin
2026-08-03 20:22:06 -04:00
parent cda56142a3
commit 5aabfe0e9b
5 changed files with 8018 additions and 256 deletions
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1
platformio.ini
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@@ -24,7 +24,6 @@ lib_deps =
mathieucarbou/ESP Async WebServer @ ^3.0.6
bblanchon/ArduinoJson @ ^7.0.0
ricmoo/QRCode @ ^0.0.1
bitbank2/JPEGDEC @ ^1.8.4
lib_ignore =
WebServer