12 KiB
File-format parity
Last reviewed: 2026-10-12 · Last updated: 2026-10-13 · Change: minor (palette PNGs open in Indexed Color mode, #4804; earlier: CMYK Invert, Posterize and Threshold on the inks; 16-bit Lab Invert; Photoshop-oracle floor 145/258;
.atnimport maps 112 events; DDS textures open, #1327; DPX read and write, #1049; #2465 fixed: CS2 placed layers with only aPlLdblock open their contents; Photoshop Actions.atnread and write;.shccontour files read and write; earlier the same day: indexed BMP palette mode; Save keeps a JPEG's quality and a WebP's encoding) · Target: Adobe Photoshop 2026
Every format Photoshop 2026 (27.11.0) reads or writes, with PhotoCraft's support, fidelity and
tests. Photoshop's list comes from its Info.plist CFBundleDocumentTypes, the PiPL read/write
flags of Contents/PlugIns/Required/File Formats, and format names in the main binary (Open/Save
As behaviour from Adobe's documentation where the bundle doesn't say). Ours comes from
crates/codecs/src/format.rs (capability table), crates/io/src/lib.rs (import/export
dispatch), crates/psd, crates/raw, crates/heif, crates/affinity. More detail on our side:
raster formats, PSD/PSB,
OpenRaster, Paint.NET.
Summary. By count, 13 of Photoshop's 31 formats are fully supported in the directions Photoshop supports them, 4 partially (48%, measured). Weighted by use (PSD/PSB 40%, JPEG 15%, PNG 15%, TIFF 10%, camera raw 8%, WebP/AVIF/ HEIF/JXL 6%, PDF 3%, everything else 3%), presence is ~80% and ready-for-real-work ~60%: PSD is broad but not yet reliable against Photoshop (gap G1), and Photoshop PDF, AVIF read and JPEG XL are missing (gap G10). Remaining: 300–500 h including PSD fidelity.
Photoshop's formats
| Format | Photoshop | PhotoCraft read | PhotoCraft write | Fidelity and tests |
|---|---|---|---|---|
| PSD | R/W | yes | yes | 1/8/16/32-bit; Bitmap, Gray, Indexed, RGB, CMYK, Multichannel, Lab, Duotone; layers, groups, masks, vector masks, adjustment and fill layers, effects, text, shapes, smart objects (SoLd/lnk2; CS2 PlLd/lnkD read with their warp, kept as is or re-saved as SoLd once edited), smart filters (14 mapped, rest verbatim), slices, comps, Advanced Blending. Oracle floors: Photoshop-authored 145/258, io 146/170, psd-tools 236/309; round trip ≥ 169/170, 308/309, 258/256. Known failures: #1281, #2469 (#2374, text layers, closed 2026-10-10; #2465, CS2 PlLd-only smart objects, fixed 2026-10-12) |
| PSB | R/W | yes | yes | Auto-switches above 2 GB (REL-212-2); 4–5 GB fixtures generated (FILE-216-2); > 4 GB fails on Windows (#375) |
| Cloud PSD (.psdc) | R/W | no | no | Out of scope (Adobe cloud) |
| TIFF | R/W | yes | yes | 8/16/32f, Gray/RGB/CMYK, BigTIFF, every IFD, banded parallel decode; layered TIFF both byte orders (FILE-215-7: extra alpha channels not written) |
| JPEG | R/W | yes | yes | 8-bit Gray/RGB/CMYK, ICC/EXIF/XMP; Save keeps the opened file's quality (estimated from its quantisation tables, #2399); no JPEG Options dialog (quality 0–12, baseline/progressive) (FILE-215-19) |
| PNG | R/W | yes | yes | 8/16-bit, ICC/text; APNG first frame only; alpha channels on open (#2225); palette PNGs open in Indexed Color mode with their transparent entry (#4804) |
| GIF | R/W | yes | yes | File › Open keeps the first frame; New Video Layer from File and Video Frames to Layers take every frame, with the timeline rate from the delays (#572). Per-frame delays and keeping the frames in .pcraft are not done |
| BMP | R/W | yes | yes | 8-bit; palette BMPs open in Indexed Color mode |
| WebP | R/W | yes | yes | Lossless and our own lossy VP8 encoder; ICC/EXIF/XMP; Save keeps an opened file lossy (at its quality) or lossless (#2399) |
| AVIF | R/W | no (#463) | optional feature, off by default | |
| JPEG XL | R/W | inside DNG only | no | |
| HEIF/HEIC | R/W(HEIF) | yes (pure-Rust heic-rs, heif feature, on in releases) |
no | 8/16-bit |
| OpenEXR | R/W | yes | yes | f16/f32; deep EXR and Cryptomatte readers (corpus/exr) |
| Radiance HDR | R/W | yes | yes | f32 |
| Portable Bit Map (PBM/PGM/PPM/PNM/PFM/PAM) | R/W | yes | yes | 8/16/32f |
| FITS | R/W (FITS Liberator plug-in) | yes | yes | 8/16/32f gray or RGB, header cards kept; no fpack, no debayer |
| Targa | R/W | yes | yes | 8-bit |
| Photoshop PDF | R/W | no (#2541) | raster only (print, artboards to PDF) | No vector/text PDF, no multi-page save, no PDF presentation (FILE-215-10) |
| Photoshop EPS, DCS 1.0/2.0, EPS TIFF/PICT preview | R/W | no | no | |
| Generic EPS / AI | R (rasterize) | no | no | |
| SVG | R (rasterize) | yes, as editable shape layers or a vector smart object | no | Better than Photoshop for editing; gradients approximated (FILE-215-9) |
| JPEG 2000 | R/W | no (#1047) | no | |
| Cineon / DPX | R (DPX), R/W (CIN) | DPX: luma, RGB, RGBA at 8/10/12/16 bits, both byte orders (#1049); Cineon no | DPX: 8/10/12/16 bits (dpxBits, --dpx-bits); Cineon no |
Writes DPX, which Photoshop only reads; header fields (creator, project, copyright, transfer, frame rate, time code…) round-trip; no Cineon, no RLE |
| DICOM | R/W | no | no | |
| PCX | R/W | no | no | |
| Pixar | R/W | no | no | |
| Amiga IFF | R/W | no | no | |
| Wireless Bitmap | R/W | no | no | |
| MPO / JPS (stereo) | R/W | no | no | |
| PICT | R | no | no | Legacy |
| Scitex CT | R/W | no | no | Legacy |
| Photoshop Raw (.raw) | R/W | no | no | |
| Camera raw (via Camera Raw 18.7) | R | partial | – | See below |
Camera raw
Photoshop opens raws through Camera Raw 18.7 (the bundle registers cr2, crw, dcr, dng, erf, mos, fff, 3fr, mef, mfw, iiq, nrw, rwl, srw, mrw, nef, orf, pef, raf, srf, x3f; Camera Raw itself supports many more, including CR3).
| Camera format | PhotoCraft | Evidence |
|---|---|---|
| DNG (incl. LJPEG and JPEG XL tiles) | yes; lossy DNG no | FILE-215-11 |
| Canon CR2 | yes | |
| Canon CR3 | detected, unsupported | crates/raw/src/lib.rs:219 |
| Nikon NEF/NRW (lossless, lossy) | yes; "lossy after split" no | #50; D5100 image area measured on three 14-bit lossy NEFs; validation |
| Sony ARW/SR2/SRF (incl. compressed) | yes | |
| Panasonic RW2, Pentax PEF | yes | |
| Olympus ORF | uncompressed only | |
| Fujifilm RAF (Bayer and X-Trans) | uncompressed only; no Fuji colour calibration | |
| Others (CRW, 3FR, IIQ, X3F, SRW, MRW, ERF…) | embedded preview only | |
| .xmp sidecars, highlight modes, raw preferences | missing | FILE-215-11 |
| Camera Raw as a PSD smart filter | partial | 2026-10-07: WB, Light/Presence, curves, HSL, grading, detail, grain, vignette mapped (FILE-215-12) |
2026-10-11: on #2135's embedded-JPEG rendering work, open-time Camera Raw tuning preserves the fitted rendering while changing Exposure, Temperature and Tint. Default tuned import matches normal import exactly; output remains full-resolution 16-bit ProPhoto. This improves appearance when a usable preview is present, without adding a measured D5100 colour profile. Counts and the G14 estimate are unchanged.
Formats Photoshop doesn't have (ours only)
| Format | Read | Write | Notes |
|---|---|---|---|
.pcraft (native) |
yes | yes | Incremental, autosave, crash recovery, atomic save |
Affinity .af, .afphoto, .afdesign, .afpub |
yes | no | See below |
Paint.NET .pdn |
yes | no | pdn.md |
OpenRaster .ora |
yes | yes | ora.md |
| ICO, QOI | yes | yes | |
DirectDraw Surface .dds |
yes | no | Top mip level of a 2D texture: uncompressed RGB, RGBA or luminance, BC1–BC3 (DXT1/3/5), legacy or DX10 header. Cubemaps, arrays, volumes and BC4–BC7 are refused (#1327). Photoshop needs a plug-in |
Krita .kra, GIMP .xcf, Procreate |
no | no | Not in Photoshop either |
Affinity import notes (moved from roadmap.md)
2026-10-08: Affinity .af, .afdesign, .afphoto and .afpub documents (container versions
8–12) open natively (format notes): pages and artboards, layers
and groups, curves and geometric shapes with fills, gradients and strokes, text as type layers,
placed images as smart objects, pixel layers and masks, as an 8-bit RGB document without a source
save path. Measured against the thumbnail Affinity embeds in each file, 21 pinned public documents
(cargo xtask corpus --affinity) differ by 0–4.6 of 255 on average. Layer effects, adjustments,
live filters, brush strokes, special shapes, master pages and CMYK/Lab/16-bit document colour are
approximated or left out, each with a warning; damaged or unknown files fall back to the embedded
preview. Affinity writing is not implemented: no Affinity installation was available to check
written files, so .af export stays unsupported.
2026-10-10: current .af artboard properties (phrp/aprp) are recognized alongside the
legacy flag, including converted curve boards. Synthetic two-board regressions check separate
bounds, overflow clipping, .pcraft/PSD board and pixel round trips, and moving one board with its
children through undo/redo. Nested boards remain masked groups; rotated/curved board outlines
still import at their bounding rectangle.
2026-10-09: corpus/affinity/ now has 39 pinned documents and 21 PNGs (20 rendered references and
one bitmap-fill texture): the prior 21 public documents plus 18 CC0 samples for #1606. The new
samples compare against their exported PNGs;
mean differences range from 0.44/255 (conical gradients) to 86.05/255 (RGB/32 reduced to 8-bit).
Clouds, hearts, cogs, callouts, arrows, double stars, tears, crescents, diamonds and circular segments
now import as parametric shapes; the special-shapes sample measures 5.68/255 against its PNG. The
remaining gaps in #1606 stay tracked with per-sample corpus ceilings.
Presets and data files
| Format | Photoshop | PhotoCraft | Notes |
|---|---|---|---|
Brushes .abr |
R/W | R/W | psd/src/abr.rs (v6/v12) |
Gradients .grd |
R/W | R/W | |
Patterns .pat |
R/W | R/W | |
Swatches .aco, .ase |
R/W | R/W | FILE-215-14 |
LUTs .cube / .3dl / .look |
R/W (Export Color Lookup) | R/W / R / R | cms/src/lutfile.rs |
Keyboard shortcuts .kys |
R/W | R | engine/src/kys.rs |
| ICC profiles | R | R | Own CMS |
Actions .atn |
R/W | R/W | psd/src/atn.rs (version 16 sets, exact round trip), engine/src/atn_cmds.rs (112 Photoshop events ↔ commands; other steps kept verbatim). Panel menu, CLI batch --actions set.atn, actions.load/actions.save. Photoshop 5-era version 12 files unsupported (AUTO-219-2) |
Styles .asl |
R/W | no | #1693 |
Contours .shc |
R/W | R/W | psd/src/shc.rs; Contour Editor Load…/Save… (FILE-215-15). No user contour library; not yet checked against a Photoshop-written file |
Custom shapes .csh, tool presets .tpl |
R/W | no | |
Curves .acv, Levels .alv, other adjustment presets |
R/W | not audited | |
| C2PA Content Credentials | R/W | no | #1050 |
Revision history
| Date | Change | Summary |
|---|---|---|
| 2026-10-13 | minor | Palette PNGs open in Indexed Color mode (#4804) |
| 2026-10-12 | minor | .atn: 112 events mapped (Select and Mask, Filter Gallery Spatter, Ripple, Crystallize, Pattern Fill layers, mask targeting, Step Backward, points, Bitmap) |
| 2026-10-12 | minor | DDS textures open, read-only (#1327) |
| 2026-10-12 | minor | #2465 fixed: Photoshop CS2 placed layers (PlLd only, file in lnkD) open as editable smart objects and save their edits |
| 2026-10-12 | minor | CMYK Invert, Posterize and Threshold work on the inks and 16-bit Lab Invert mirrors a and b around neutral (oracle bad pixels: CMYK 71–77% → 9–10%, 37% → 1.6%; lab16 invert 52% → 1.2%); Photoshop-oracle floor 133 → 145 of 258 |
| 2026-10-12 | minor | DPX read and write (#1049); Cineon still missing |
| 2026-10-12 | minor | Photoshop Actions .atn: read and write, 90 events mapped, the rest kept verbatim (AUTO-219-2) |
| 2026-10-12 | minor | Presets table: Contours .shc read and write through the Contour Editor (FILE-215-15); .csh and .tpl stay missing |
| 2026-10-12 | minor | Palette BMPs open in Indexed Color mode (#3802) |
| 2026-10-12 | minor | Save writes a JPEG at its own estimated quality and a WebP lossy or lossless as opened (#2399) |
| 2026-10-11 | minor | D5100 image area and fitted-look preservation in Camera Raw tuning |
| 2026-10-10 | major | First version: Photoshop 2026 27.11.0's formats from its bundle, against our codecs; Affinity notes moved from roadmap.md |