DPX at 10 or 12 bits and Cineon (always 10) are planned as U16, so
DepthReduced, which compares sample types, never fired: a 16-bit document
saved at 10 bits lost six bits per sample silently, and a float one was
told it would be reduced to 16-bit.
FidelityWarning::BitsReduced { from, bits } names the stored depth. Float
samples always get it; U16 ones only when some sample is not already a
code value at that depth, so a frame opened from a 10- or 12-bit file
saves back without a warning. U8 widens losslessly and stays silent.
CodeRabbit follow-up:
- data_end counts the scan-data bytes it crosses, and decode's
truncated-input bound is measured on those, not on bytes.len(): APP
padding padded before the scan used to charge the budget without
describing one more pixel.
- a regression test builds a truncated JPEG with ~256 KiB of complete
COMMENT padding whose patched 20000x20000 frame was admissible under
the file-length bound, and verifies padding alone cannot admit it
(while the same file at its real size still recovers).
- Limits::max_alloc docs state the animated WebP charging, next to the
PNG text/XMP sentence.
A truncated JPEG scan under a large declared frame was filled out by the
backend to the full admitted size; reject it when the file cannot plausibly
account for the pixels. Animated WebP frames each keep a copy of the ICC
profile, so the aggregate admission now counts it.
crates/engine/src/file_cmds.rs: batch keeps the save-point closure (takes the output path) and also copies the session's authorize hook into each scratch session, as main now does.
crates/raw/src/sensor.rs: both sides cap the memory of retained tiles; kept the existing retained_segment_bytes check (checked multiplication, same limit) and dropped main's duplicate inline loop.
Header::get scanned every card linearly, and axis resolution looks up
NAXIS1..NAXISn while find_image/data_len re-resolve the axes. Both the
commentary-card count and the NAXIS count are file-controlled, so a
crafted header multiplied them into quadratic header-processing work
without a correspondingly large decoded image.
Build a first-occurrence keyword index once in parse_header (skipping
HIERARCH cards, matching the prior filter) and use it in get().
Finding: eb2121d8-9dee-4422-bd57-f78dce60a61b (CWE-407)
Cryptomatte metadata enumeration had two file-driven amplifiers:
- cryptomatte_keys() tested key membership with iter().any(), O(n^2) in
the number of distinct cryptomatte/<key>/<field> attribute groups;
- layers() called layer_streams() for every key, rescanning all channels
and allocating a fresh owned stream list even when many keys name the
same layer.
Use a HashSet for key membership (keeping file order) and cache
layer_streams results by resolved layer name within each header, so
repeated keys reuse the discovered streams.
Findings:
- 120f4d51-b981-4fcc-abec-26f45f3efd29 (CWE-407, quadratic key membership)
- dae6e76b-a491-4089-892f-4cf34b911f36 (CWE-400, repeated per-key stream scans)
xmp_values advanced its cursor only past the matched key, so the
value-closing search (find(close)) rescanned the remaining packet for
every property-like substring. Repeating text such as
' tiff:ResolutionUnit>' inside the packet produced quadratic CPU work
even when no real resolution property existed.
Advance the cursor past each located value; a missing close delimiter
means the value is unterminated, so no later value can parse and the
scan stops. Valid multi-value extraction is unchanged.
Finding: 6ce55e33-27f0-4fb9-a22f-737382e1d328 (CWE-407)
The decode admission counted each pixel's channel samples and vector
header but not the heap capacity of the per-pixel (id, coverage) pair
lists. A compressed Cryptomatte document could therefore return pixel
storage exceeding the caller's max_alloc budget.
Include the maximum pair capacity (one pair per rank, 8 bytes each) in
the per-pixel byte count before check_bytes.
Finding: 5482ed4a-bc95-43fc-84d1-d5bfb6373761 (CWE-400)
Two deep-EXR allocation gaps:
- flatten() allocated the flattened output and the full display-window
stage (nc f32 samples per pixel) without a limit check; the deep decode
only admitted the data window at four bytes per pixel, before the
channel layout was known. Pass Limits into flatten and re-check both
buffers at the real f32 layout size.
- decode_deep built a per-pixel usize block index before validating the
chunk's declared packed sizes. Compute the block bounds first, validate
the payload is present, then materialize the index, so a truncated or
lying chunk is rejected before the index is allocated.
Findings:
- feb6fcd8-58df-47e2-a04a-d4d81d5565aa (CWE-789, display-stage allocation)
- 9c53025d-65f8-4bcc-9161-143a4c5d7f46 (CWE-789, index before payload check)
When transforms (orientation/clean-aperture crop) are applied, admission
checked only the transformed output size. The delegated HEVC decoder
allocates the full coded image before cropping, so a HEIF with a small
visible aperture over a large coded image bypassed the limit policy.
Always check the coded dimensions against the full limits before
delegating, in addition to the transformed size.
Note: the related SPS-driven and grid-tile allocations (findings
75048229 and 2db4c59e) occur inside the pinned heic-rs dependency from
parameter sets the container does not expose; fully bounding those needs
a decoder-side change and is tracked separately.
Finding: ec5cec31-8a62-4963-8045-e3ec9d9e4931 (CWE-400)
crates/ui-egui/src/lib.rs: replay_save doc comment names both Export As and JPEG; replay_save uses the PR's FormatChoices::from_step, after main's export_dialog::replay branch.
docs/file-format-parity.md: header keeps main's text plus the JPEG Options item (last updated 2026-10-19); TIFF row is main's, JPEG row is the PR's; change-log rows once each, newest first.
docs/gaps.md: header keeps main's text plus the G10 item (last updated 2026-10-19).
apps/photocraft/src/services.rs: SAVE_FILTERS keeps the DDS entry from main and the PR's Cineon entry.
crates/codecs/README.md: Cineon table row from the PR (read and write), then main's DICOM and Amiga IFF rows.
crates/codecs/src/format.rs: caps keep the PR's Cineon (read and write) and main's Dicom and Iff rows.
crates/codecs/src/lib.rs: encode keeps the PR's Cineon arm and main's Dicom and Iff arms.
docs/file-format-parity.md: header kept from main with the Cineon write item added; Cineon / DPX row from the PR, DICOM row from main; the PR's change-log line added once at the top.
docs/gaps.md: header kept from main with the Cineon write item added; Missing list without 'Cineon write'; the PR's Cineon progress line replaces main's read-only one; the PR's change-log line added once at the top.
docs/file-format-parity.md: header line kept from main with the animated WebP item added in front; BMP row from main; WebP row from main plus the PR's animation sentence; the PR's change-log line added once, above the first 2026-10-14 row.
apps/photocraft-web/src/web.rs: OPEN_EXTS kept main's list (with the DICOM extensions) and added iff, lbm, ilbm.
apps/photocraft/src/services.rs: OPEN_EXTS kept main's list (with the DICOM extensions) and added iff, lbm, ilbm.
crates/codecs/README.md: kept both the DICOM and the Amiga IFF table row and section.
crates/codecs/src/format.rs: kept both the Dicom and the Iff variants in every match, detect runs the DICOM check then the IFF check, Format::ALL length re-counted (22).
crates/codecs/src/lib.rs: one use line importing dicom and iff; both decode and encode arms kept.
docs/gaps.md: header line kept from main, with the PR's 'Cineon and Amiga IFF read' wording.
apps/photocraft-web/src/web.rs: OPEN_EXTS kept main's list and added dcm, dicom, dc3 after cin.
apps/photocraft/src/services.rs: OPEN_EXTS kept main's list and added dcm, dicom, dc3 after cin.
Main moved on (integration batch #8095 and others). Two conflicts:
- docs/gaps.md revision history: both rows kept, newest first.
- docs/scorecard.md (generated): main's version taken. It needs
`cargo xtask scorecard` again: with FILE-215-19 done, File
compatibility reads 8 done / 5 missing rather than main's 7 / 6.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Main added DDS saving (#5993): DDS Options, and FormatChoices carrying the
Targa and DDS answers through every save path (this branch's SaveChoices
carried Targa and JPEG). Resolved by keeping main's name and making it
the one struct for all three answers.
- lib.rs: FormatChoices { tga_bits, dds, jpeg } with from_params (strict),
from_step (lenient JPEG read of a recorded step), apply and record;
main's separate block is folded in. Both prompts (dds_options and
jpeg_options) are kept everywhere: save_to asks Targa, then DDS, then
JPEG Options; save_options_open covers all four. save_in_place takes
main's (path, choices) signature and records the plain-Save step with
plain_save_step for JPEG plus the Targa/DDS answers (save_in_place_with
folded into it). journal_as_plain_save relabels a parked Targa, DDS or
JPEG prompt and keeps tgaBits/dds*/quality/jpegFormat when dropping the
path. replay_save reads choices with from_step.
- SAVE_OPTIONS_OPEN names all four prompts; DDS Options uses it too.
- targa_options_ui: main's plain-Save step (no path) through this
branch's write_answered_save. JPEG Options gets main's Enter-on-a-
focused-Cancel fix.
- view_cmds Save a Copy asks Targa, DDS, then JPEG Options; write_copy
takes FormatChoices.
- control.rs: both app.save tests (JPEG and DDS) kept.
- engine file_cmds: SaveOpts keeps jpeg_format and dds; param docs list
both jpegFormat and ddsCompression/ddsMipmaps. CLI: both --jpeg-format
and --dds-compression/--dds-mipmaps. codecs re-exports JpegFormat and
DdsCompression/DdsOptions.
- docs/book: both entries kept (control-protocol app.save lists both).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
DDS textures can now be saved, not just opened: uncompressed (BGRA, BGRX, L8, A8L8; lossless) or BC1/BC2/BC3 (DXT1/3/5) from a clean-room block encoder, with an optional box-filtered mip chain, in the legacy header. Save As and Save a Copy ask with DDS Options; scripts pass `ddsCompression`/`ddsMipmaps` (file commands, control `app.save`, RPC `doc.save`, MCP `doc_save`/`doc_export`), and the CLI takes `--dds-compression`/`--dds-mipmaps`. Targa and DDS answers travel together as `FormatChoices` through the Save As flow.
Review follow-ups:
- File › Save behind DDS or Targa Options records a plain Save with its answer, and replaying `file.save` applies it (#3531).
- The block encoder finds the principal axis from every channel, so a channel that varies on its own can't hide the others' variation.
- DDS joins the shared round-trip suite; the header is built before the output buffer is allocated.
- Enter on a focused Cancel in DDS, Targa or TIFF Options cancels instead of saving.
Save As and Save a Copy to a JPEG now ask for JPEG Options before writing,
as Photoshop does. Re-creates #4330 on current main and folds in the
unique parts of #5580 (#5563).
- codecs: `JpegFormat` (Baseline, Optimized, Progressive) on
`EncodeOptions`. Progressive writes SOF2. Baseline Optimized fits the
Huffman tables only at 4:4:4 (Gray, CMYK) or with Progressive: fitted
tables make the baseline scans non-interleaved, which zune-jpeg 0.5.15
decodes wrongly with 4:2:0 chroma (zune-image#419), as Save for Web
already works around.
- engine: a `jpegFormat` save param (file.saveACopy, Batch, Image
Processor, Layers to Files and every SaveOpts user; anything but the
three names is BadParams before writing) and a shared 0–12 -> 1–100
`jpeg_quality()` that maps NaN/inf to 100.
- ui-egui: `jpeg_options_ui` (Quality 0–12 with Low/Medium/High/Maximum
presets, Format Options), parked like Targa Options. It starts at the
opened JPEG's own quality (`file_encoding`, #4032), else the Export
preference; left there, OK writes that quality exactly and the step
records no `quality`. `SaveChoices` (Targa bits + JPEG) replaces the
bare `tga_bits` through file.save / file.saveAs / app.save, replay and
Save a Copy; automation never prompts. `write_answered_save` is shared
with Targa Options. `park_at` + `Start` let any save seed the prompt.
A File › Save that confirms the document's own flat JPEG is still
journalled as a plain `file.save` (#3531).
- CLI: `--jpeg-format`.
- i18n: five new strings in all 20 catalogs (#4330's duplicate de/es/zh
`Low`/`High` rows dropped: main has them since #4008).
- Docs: book raster-formats JPEG bullet, control protocol, file-format
parity, gaps G10, target-app parity; scorecard FILE-215-19 done.
Co-authored-by: SckraT <70698629+SckraT@users.noreply.github.com>
Co-authored-by: PierrunoYT <95778421+PierrunoYT@users.noreply.github.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* perf(codecs): Avoid redundant PNG filter passes
Keep the previous filter path as an exact byte oracle and measure the filter kernel independently of compression.
* docs(perf): measure PNG filtering on real images
* perf(codecs): stop PNG candidates at the winning cost
* Drop the local benchmark report
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Brandon Thomas <echelon@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Both sTER modes describe side-by-side subimages: mode 0 is cross-fuse (right eye first), and mode 1 is diverging-fuse (left eye first). Correct the enum and document comments without changing their serialized byte values. Add a labelled-pixel check against the literal mode bytes in PNG Extensions 1.4.0 section 3.6.
Co-Authored-By: OpenAI Codex <noreply@openai.com>
* PNG: keep a stereo file's sTER pairing on save (#6063)
Read the sTER chunk (PNG Extensions 1.4.0 §3.6) when a PNG opens, store it
on the document's FileEncoding, and write it back when saving, so a stereo
PNG still says it is a stereo pair. Covers the ordinary and the palette
PNG encoders, including interlaced output.
* io tests: pass the new sTER argument to encode_png_indexed
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: highperfocused <highperfocused@pm.me>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Przemyslaw Majdak