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photocraft/docs/gaps.md
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Roaldo Sulejmani 5025fd2895 Color Sampler tool (#1046) (#2753) 
* Color Sampler tool (#1046)

Add the Color Sampler to the Eyedropper (I) flyout: click to pin numbered
sample points to canvas pixels, drag to move, Alt-click (or drag off-canvas)
to remove, Clear All in the options bar, at most 10 per document. Each point
reads one composite pixel (RGB 0-255 and naive device CMYK, same as the
pointer readout) and the Info panel lists them under their number with the
position in the ruler unit; the readouts refresh when the document changes.

Points are per-document engine view state (DocState.color_samplers): they
belong to their document, are discarded on close, and are not saved to
.pcraft or PSD. They are driven by commands shared by the UI, CLI, control
channel and MCP (view.colorSamplers.add/.move/.delete/.clear/.list); the
mutations change no pixels and add no History step.

Points follow the canvas geometry (crop, Canvas Size, Image Size, Image
rotation/flip, rotated crop) through a pending Session.sampler_map that
Session::edit applies before culling the points that land outside the new
canvas; the count removed is reported in the status bar.

- engine: new sampler_cmds.rs (commands + shared readout helpers) and the
  sampler_map wiring in lib.rs, image_cmds.rs, mode_cmds.rs, commands.rs,
  analysis_cmds.rs (compound rolls points back on error).
- ui-egui: Tool::ColorSampler + original sampler.svg icon, toolbar slot,
  Info panel list, options bar, pointer handling, overlay markers, cursor.
- docs/scorecard.md regenerated (TOOL-1649-1 no longer says the tool is
  missing). No menu item, so parity is unchanged (627/627).

* Color Sampler follow-up: tool count, README, i18n, roadmap

The full ui-egui suite (not just the filtered tests) surfaced these gaps:

- state.rs: Tool::ALL.len() assertion 52 -> 53.
- README.md: "52 tools" -> "53 tools" and add Color Sampler to the list,
  so readme_tool_list_matches_tool_all passes.
- i18n: the options-bar hint, "{n} of {max} sample points" and
  "No document open" need entries in every catalog that claims complete
  menus (every_tl_literal_is_translated); added to all 16 (coverage
  1584/1584). The translations were drafted alongside the tool.
- docs/roadmap.md: drop Color Sampler from the missing-tools list and note
  it landed.

* Color Sampler: fit main's new tools and Image Size resample type

Reset Tool covers ColorSampler, the test ViewXform sets aspect, and
Image Size checks Method::None instead of an Option.

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>
2026-10-11 11:43:09 -04:00

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# Where PhotoCraft falls short of Photoshop
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-10 · **Change:** major (first version: every known shortfall ranked, from the 2026-10-10 re-measure) · **Target:** Adobe Photoshop 2026
Every known shortfall against Photoshop 2026 (27.11.0), one entry each, ranked by user impact
on the way to beta. This is the work list agents pick from: take the highest-ranked entry that
nobody is working on, and when you close part of one, update its evidence and estimate here and
the matching parity doc. Numbers come from [`target-app-parity.md`](target-app-parity.md);
checklist ids (`TOOL-…`, `FILE-…`, `UI-…`) are rows in [`scorecard.md`](scorecard.md); `#n` are
GitHub issues.
No gap blocks alpha: the [alpha gate](roadmap.md#alpha-gate) passes. "Blocks beta" marks what
stands between alpha and beta.
Hours are Opus 5.5 agent-hours, one agent working sequentially, including tests. **Human** marks
what an agent can't finish alone.
## Summary
| # | Gap | Kind | Impact | Estimate | Parity doc |
|---|---|---|---|---:|---|
| G1 | PSD fidelity and Photoshop acceptance | file format | blocks beta | 150–250 h | [file-format-parity](file-format-parity.md) |
| G2 | Interactive performance | performance | blocks beta | 200–350 h | [scorecard](scorecard.md#performance) |
| G3 | User-reported bug backlog | stability, UI | blocks beta | 250–400 h | [target-app-parity](target-app-parity.md) |
| G4 | Brush feel | UI / painting | high | 100–180 h | [brush-parity](brush-parity.md) |
| G5 | Transform, handles and modifiers | UI | high | 60–110 h | [ui-parity](ui-parity.md) |
| G6 | Missing tools (12) | features | high | 60–100 h | [ui-parity](ui-parity.md#tools) |
| G7 | Workspaces shown as parameter dialogs | features | high | 80–140 h | [target-app-parity](target-app-parity.md#feature-areas) |
| G8 | Type depth | features | high | 120–200 h | [target-app-parity](target-app-parity.md#feature-areas) |
| G9 | Panels, preferences and workspace | UI | medium-high | 150–250 h | [ui-parity](ui-parity.md#panels-and-workspace) |
| G10 | Missing and partial file formats | file format | medium | 120–220 h | [file-format-parity](file-format-parity.md) |
| G11 | Actions and scripting | ecosystem | medium | 120–200 h | [target-app-parity](target-app-parity.md) |
| G12 | Pen tablets and display hardware | hardware | medium | 80–150 h | [hardware-parity](hardware-parity.md) |
| G13 | Languages: Hindi, Arabic, Vietnamese, RTL, engine messages | localization | medium | 80–140 h + human | [localization-parity](localization-parity.md) |
| G14 | Camera Raw depth | features, formats | medium | 120–200 h | [file-format-parity](file-format-parity.md#camera-raw) |
| G15 | AI and generative features | AI | medium (high for some users) | 300–600 h + human | [target-app-parity](target-app-parity.md) |
| G16 | Plug-in compatibility (.8BF, UXP) | ecosystem | medium | 250–450 h + human | [target-app-parity](target-app-parity.md) |
| G17 | Platforms and distribution | platforms | low-medium | 30–60 h + human | [scorecard](scorecard.md#distribution) |
## Feature gaps
### G1. PSD fidelity and Photoshop acceptance
- **Missing:** PSDs we write are not always accepted by Photoshop, and Photoshop-authored files
don't always render as Photoshop renders them.
- **Evidence:** corpus floors (`crates/io/tests/corpus.rs`, scorecard): Photoshop-authored
oracles 133/256 (52%), io corpus 146/170 (86%), psd-tools 236/309 (76%); round trips ~100%
within the corpus. Smart-filter re-render matches 5/30. User reports: a PSD with text layers
re-saved unmodified would not reopen (#2374, closed 2026-10-10), Photoshop 26.6 cannot reopen our files (#1281), "PSD not
opening in Photoshop" (#2469), a CS2-era smart object unavailable (#2465), PSB smart object
blank (#1764), perspective placed layers flattened (#579), PSB > 4 GB fails on Windows (#375).
No test opens our exports in a third-party editor (FILE-216-4).
- **Impact:** PSD is the format professionals exchange. Beta requires it to be reliable.
- **Estimate:** 150–250 h. **Human:** opening exports in Photoshop on the owner's Mac (or a
scripted check there) is the only real oracle.
### G6. Missing tools
- **Missing (4 of 68):** Color Replacement (engine command exists), Art
History Brush, Add Anchor Point, Delete Anchor Point. Convert Point landed (#3204). Freeform
Pen and Curvature Pen landed (#1054); Color Sampler landed (#1046, `view.colorSamplers.*`); Horizontal and Vertical Type Mask landed (#1055,
`type.createSelection`); Perspective Crop landed (#1043, `image.perspectiveCrop`); Frame landed
(#2914).
- **Evidence:** `Tool` enum (`crates/ui-egui/src/state.rs`) against the 67 `<tool>` entries of
Photoshop's `Default Keyboard Shortcuts.kys` plus Remove, Triangle and Curvature Pen.
- **Impact:** users look for them by name and shortcut; several are daily tools for designers.
- **Estimate:** 60–100 h (2–9 h each, per the calibration).
### G7. Workspaces shown as parameter dialogs
- **Missing:** Select and Mask workspace layout, Refine Edge brush and outputs
(TOOL-214-1, Refine Hair #2671; its view modes preview live since #1754); Content-Aware Fill workspace with a paintable sampling area
(TOOL-214-15); Vanishing Point plane editor (TOOL-214-14); Content-Aware Scale through the
transform box (TOOL-214-7); Puppet Warp mesh following the outline (TOOL-214-6); Content-Aware
Move's Transform On Drop (TOOL-213-4).
- **Evidence:** scorecard rows above, all partial or missing.
- **Impact:** these are the tools retouchers and compositors use daily; a slider dialog is not a
substitute.
- **Estimate:** 80–140 h.
### G8. Type depth
- **Missing:** type on a path (TYPE-218-1), paragraph direction UI (TYPE-218-2), complex-script
fallback fonts and golden tests (TYPE-218-3), variable-font axes (TYPE-218-4), OpenType panel
UI (TYPE-218-5), manual and optical kerning with PSD round trip (TYPE-218-6, #206), live Warp
Text preview (TYPE-218-7, #2689), triple/quadruple click (TYPE-218-8), "rasterize and continue"
for distort/perspective on type (TYPE-218-9), text free transform (#2630).
- **Evidence:** scorecard Type: 0 done, 3 partial, 6 missing. The Type tool froze the app for
60 s on one macOS machine (#2518).
- **Estimate:** 120–200 h.
### G11. Actions and scripting
- **Missing:** document-independent action recording (AUTO-219-1), a full Actions panel with
step toggles and .atn import (AUTO-219-2), replay tests (AUTO-219-4), Batch recursion and
naming (AUTO-219-5), ExtendScript/UXP compatibility.
- **Ahead of Photoshop:** CLI, MCP and the JSON control channel drive every command.
- **Estimate:** 120–200 h. **Human:** whether to support a JavaScript scripting dialect at all
(AGENTS.md forbids JS in the app).
### G14. Camera Raw depth
- **Missing:** CR3 (detected, unsupported), compressed RAF, lossy DNG (FILE-215-11), .xmp
sidecars, masking and calibration in the Camera Raw dialog, per-camera colour for non-DNG
cameras, lens profiles.
- **Evidence:** `crates/raw/src/lib.rs:219` (CR3), scorecard FILE-215-11/12, #50.
- **Estimate:** 120–200 h.
### G15. AI and generative features
- **Missing:** Generative Fill and Expand, Generative Upscale, Neural Filters, Sky Replacement,
Super Zoom, ML Select Subject/Sky. There is no ML runtime (AUTO-219-7). Classical substitutes
exist (GrabCut/max-flow selection, Remove tool by non-local patch completion).
- **Evidence:** Photoshop's `Required/UXP` ships the Neural Filters gallery and its `.kys` has
a Neural Filters taskspace; users ask for local models (#2313, #1996, #2682).
- **Estimate:** 300–600 h. **Human:** owner decision #41 (model licences, local vs remote).
### G16. Plug-in compatibility
- **Missing:** hosting Photoshop .8BF filters (#2647), UXP panels, CEP. PhotoCraft has its own
sandboxed WebAssembly plug-in ABI v1 (`docs/plugins.md`), but ABI v2 (panels, progress, other
layers) is missing (AUTO-219-6).
- **Estimate:** 250–450 h. **Human:** .8BF needs native code under the isolated-`unsafe` rule.
## UI / UX gaps
### G3. User-reported bug backlog
- **Missing:** fixes for 579 open issues (2026-10-10), filed mostly by 0.5/0.6 users. By title:
~150 UI/panels/menus/shortcuts, 94 file/format, 87 layers, 54 painting, 54 selection,
46 type, 41 performance, 34 transform/move, 25 Linux/Wayland, 24 Windows, 20 macOS.
- **Impact:** each is a place where a Photoshop user hits something different from what they
expect; together they are why ready-for-real-work is ~45% while breadth is ~76%.
- **Estimate:** 250–400 h (many overlap with other gaps; count each fix once).
### G4. Brush feel
- **Missing:** lag with big brushes (#2619, #1994) and under the cursor (#2566, #1343); jumpy
pressure on Windows (#2046) and tap sensitivity (#1933); stair-stepped line weights (#1776),
interpolation and smoothing problems (#2138), edge falloff (#2149), pixelated cursor vs
Photoshop (#1433), brush rotation not driven by pen rotation (#1301); live preview only for
Brush and Eraser (TOOL-213-7); no image file as a brush tip (TOOL-213-12); per-control pressure
curves (TOOL-213-11); 4 of Photoshop's symmetry modes.
- **Detail:** [`brush-parity.md`](brush-parity.md).
- **Estimate:** 100–180 h. **Human:** checking feel on real tablets.
### G5. Transform, handles and modifiers
- **Missing:** right-click menu during Free Transform (TOOL-214-5); commit/cancel buttons in the
options bar (#2442); H/V skew fields and the full interpolation list; transform keeps layer
order and blend mode in its preview (#2439); Hand tool interrupting a transform (#2302);
blend mode/opacity edits during a transform (#1384); locked layers refused before the drag
(#2585); ⌘-drag temporary Move without box or snapping (#2681), Auto-Select box follows the
previous layer (#2666); ⌘-arrow layer nudge (#2474); path-point nudge; polygonal lasso Shift
angles (#2352); autoscroll at the edge while selecting (#2231); hold-a-key spring-loaded tools
(#2672); double-click Zoom tool to 100% (#2508); wheel and pinch behaviour (#2485, #2463,
#1989); toolbar press-and-hold flyouts (#2301); tool-key memory in a group (#2608).
- **Detail:** [`ui-parity.md`](ui-parity.md).
- **Estimate:** 60–110 h.
### G9. Panels, preferences and workspace
- **Missing:** 46 of 149 preferences do nothing (scorecard prefs audit); panel groups can't
float or tear off into OS windows (UI-217-5, #1828, #1213, #2305); Color panel lacks wheel and
slider modes (UI-217-17, #2569); UI scale presets (UI-217-9, #2492); more themes (UI-217-11,
#2661); Stamp Visible (UI-217-22); layer clipboard
(UI-217-23, #2670); tool-specific context menus beyond brushes, selections and Pen
([context-menu-parity.md](context-menu-parity.md)); Libraries, Comments, Contextual Task Bar
panels.
- **Estimate:** 150–250 h.
### G2. Interactive performance
- **Missing:** 22 of 25 budgeted scenarios are over budget (baseline 2026-10-05, a heavily
loaded machine): layer move with styles 321 ms p50 against 25 ms, opacity change 276 ms
against 20 ms, paste 12 MP 1.2 s against 100 ms, layer move on 15000×10000 16-bit 2.7 s,
Content-Aware Scale 24 MP 954 s against 3 s, Select Subject 559 ms against 100 ms; the
150-layer nudge crashes the GPU compositor (P12); a 50 MP PSB with feathered masks redraws in
~10 s (#2377); menus slow with thousands of layers (#2460); old machines lag (#2687).
- **Estimate:** 200–350 h. Serial in places (compositor architecture).
## File-format gaps
### G10. Missing and partial file formats
- **Missing:** JPEG Options dialog (FILE-215-19), Photoshop PDF read and write and multi-page PDF
(FILE-215-10, #2541), AVIF read (#463) and default-build AVIF write, JPEG XL, JPEG 2000 (#1047),
DPX/Cineon (#1049), DICOM, EPS/DCS, PCX, Pixar, IFF, WBMP, MPO/JPS, PICT, Scitex CT, Photoshop
Raw; layered TIFF extra alpha channels (FILE-215-7); spot plates (FILE-215-17); .atn, .asl,
.shc, .csh presets (FILE-215-15); TGA/PNG alpha channels on open (#2225); C2PA (#1050).
- **Detail:** [`file-format-parity.md`](file-format-parity.md).
- **Estimate:** 120–220 h.
## Hardware gaps
### G12. Pen tablets and display hardware
- **Missing:** tilt and rotation on Windows (pressure only, via WM_POINTER; no WinTab); native
Wayland tablet-v2 (#79; the pen does not click on GNOME 50, #2622, KDE #2297); eraser end on
flipped Wacom pens (#2285); HDR/EDR output (Photoshop has "Precise Color Management for HDR
Display"); monitor profile detection off macOS and live profile changes; Touch Bar (macOS
Intel only, low value); 3D mice.
- **Detail:** [`hardware-parity.md`](hardware-parity.md).
- **Estimate:** 80–150 h. **Human:** tablets and HDR displays to test on.
## Localization gaps
### G13. Hindi, Arabic, Vietnamese, RTL and engine messages
- **Missing:** catalogs for Hindi, Arabic and Vietnamese (3 of the 12 key languages); right-to-
left UI layout; Devanagari/Thai/Khmer fallback fonts; engine error and status messages in
English in every language; browser-locale detection and CJK fonts on the web; Japanese IME on
Windows (#590); installed Japanese fonts missing from the font list (#2330); Arabic layer names
as tofu (#1408, #1693).
- **Detail:** [`localization-parity.md`](localization-parity.md).
- **Estimate:** 80–140 h. **Human:** native-speaker review of every catalog (none is recorded).
## Platform gaps
### G17. Platforms and distribution
- **Missing:** Windows code signing (material not obtained), Windows ARM64 (DIST-220-2), in-app
update check (DIST-220-1, #2650, #2375), in-app bug report (DIST-220-3), Flathub (#173),
starting without a GPU adapter (#2519, #2412), Windows 7 (#2310, out of scope), Intel Macs with
OpenCore (#1859).
- **Estimate:** 30–60 h. **Human:** signing certificates.
## Revision history
| Date | Change | Summary |
|---|---|---|
| 2026-10-10 | minor | Checked against the alpha gate (no alpha blockers); #2374 marked closed |
| 2026-10-10 | major | First version, from the full re-measure against Photoshop 2026 27.11.0 and the open issues |
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