Khawar Zamman Wani 7c2127b6bc PNG import in steps: stream the rows into tiles, turn upright in bands ...

PngImport decoded the whole image and then copied it into a second, tile surface (about
+400 MB for a 100 MP RGBA8 file, enough to kill a browser tab). A PNG whose rows come in
final order now streams: PngDecodeRows::step_stream hands each group of rows on, they
become tiles at once (the PngStream the one-shot streamed import also uses) and are
dropped, then the prune scan runs in batches. decode_rows is the same step_stream driven
to the end, so there is one path. Interlaced, animated and early-eXIf-oriented files are
decoded whole as before; a late eXIf sends a streamed import back to a whole decode.

The turn upright of an EXIF orientation 2-8 was one whole-buffer pass in the poll of the
last rows; OrientSteps (photocraft-codecs) does it in bands of 64 rows through the same
band writer as Image::oriented, and PngImport runs it as a stage of its own.

Memory-budget errors keep their type and text: the stream is checked as the one-shot
streamed import is, and, like the whole-image path, a layer under 32 MiB is not.
Docs for the stepped place updated.

2026-11-06 09:13:41 +05:30

..

it

PNG import in steps: stream the rows into tiles, turn upright in bands

2026-11-06 09:13:41 +05:30

jxl_export.rs

fix(codecs): integrate JPEG XL export and validate alpha fidelity

2026-10-18 23:12:07 +07:00

pnm_peak_memory.rs

Codecs: decode PNM straight into the budgeted output buffer (#2938) (#3291)

2026-10-11 21:16:07 -04:00