feat: replace JPEGDEC with stb_image for robust JPEG decoding

Browse Source

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 0d1349e8eb

commit e387976220

5 changed files with 8018 additions and 256 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

7988

src/stb_image.h Normal file

File diff suppressed because it is too large Load Diff