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fix: Increase PNGdec buffer size to support wide images (#995)

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## Summary

* Increased `PNG_MAX_BUFFERED_PIXELS` from 6402 to 16416 in
`platformio.ini` to support up to 2048px wide RGBA images
* adds a check to abort decoding and log an error if the required PNG
scanline buffer exceeds the configured `PNG_MAX_BUFFERED_PIXELS`,
preventing possible buffer overruns.
* fixes
https://github.com/crosspoint-reader/crosspoint-reader/issues/993

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This commit is contained in:
Arthur Tazhitdinov
2026-02-19 19:51:38 +03:00
committed by Dave Allie
parent 3e2c518b8e
commit b8e743ef80
2 changed files with 40 additions and 2 deletions
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4
platformio.ini
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@@ -31,9 +31,9 @@ build_flags =
-std=gnu++2a
# Enable UTF-8 long file names in SdFat
-DUSE_UTF8_LONG_NAMES=1
# Increase PNG scanline buffer to support up to 800px wide images
# Increase PNG scanline buffer to support up to 2048px wide images
# Default is (320*4+1)*2=2562, we need more for larger images
-DPNG_MAX_BUFFERED_PIXELS=6402
-DPNG_MAX_BUFFERED_PIXELS=16416
build_unflags =
-std=gnu++11