The Stage 2 quality selector lists every quality token advertised by lpoptions -l, regardless of the selected media type. Both the Epson (InkjetPrinter2, e.g. XP-55) and Canon (Pro9500 II) drivers restrict which quality values are valid per media — selecting an invalid combination makes the driver reject the job.
Example (Epson XP-55): media 0 (plain) allows {301 Fast Economy, 302 Economy, 303 Normal, 304 Fine}; media 15 (Premium Semigloss) allows {305 Quality, 307 Best Quality, 308 Draft} — the picker currently shows all 7 for every media.
CupsService.capabilities(from:listings,ppd:) populates qualities from the global lpoptions -l listing of the detected quality key (EPIJ_Qual / CNIJPrintQuality) — no media relationship (Packages/ICCeryCore/Sources/ICCeryCore/Print/CupsService.swift ~L157-170).
PrinterCapabilities has no media→quality field (PrinterModels.swift).
Checked-and-dismissed: standard PPD *UIConstraints/*Constraints (absent in both PPDs); APPrinterPreset blocks (recommended defaults only, not validity); IPP print-quality-supported/media-col-database (global lists only, no per-media matrix).
Driver truth found:
Epson: *EPIJUIConstraint: <cond>|<forbidden choice> in <EPIJDriverBasePath>/Machine/<EPIJMachineBundleName>/Contents/Resources/PDEData.dat — forbids *EPIJ_Qual <q> when LHS terms hold (*EPIJ_Medi <m> plus EPIJ_PSrc/EPIJ_FdSo/EPIJ_Ink_). Evaluating non-media terms against lpoptions *-defaults reproduces the driver sets exactly.
## Summary
The Stage 2 quality selector lists every quality token advertised by `lpoptions -l`, regardless of the selected media type. Both the Epson (InkjetPrinter2, e.g. XP-55) and Canon (Pro9500 II) drivers restrict which quality values are valid per media — selecting an invalid combination makes the driver reject the job.
Example (Epson XP-55): media 0 (plain) allows {301 Fast Economy, 302 Economy, 303 Normal, 304 Fine}; media 15 (Premium Semigloss) allows {305 Quality, 307 Best Quality, 308 Draft} — the picker currently shows all 7 for every media.
## Root Cause Analysis
- `Stage2View.qualityGroup` renders `workflow.print.printerCaps.qualities` unfiltered (`Sources/ICCery/Stage2View.swift` ~L416-420).
- `CupsService.capabilities(from:listings,ppd:)` populates `qualities` from the global `lpoptions -l` listing of the detected quality key (`EPIJ_Qual` / `CNIJPrintQuality`) — no media relationship (`Packages/ICCeryCore/Sources/ICCeryCore/Print/CupsService.swift` ~L157-170).
- `PrinterCapabilities` has no media→quality field (`PrinterModels.swift`).
- Checked-and-dismissed: standard PPD `*UIConstraints`/`*Constraints` (absent in both PPDs); `APPrinterPreset` blocks (recommended defaults only, not validity); IPP `print-quality-supported`/`media-col-database` (global lists only, no per-media matrix).
Driver truth found:
- Epson: `*EPIJUIConstraint: <cond>|<forbidden choice>` in `<EPIJDriverBasePath>/Machine/<EPIJMachineBundleName>/Contents/Resources/PDEData.dat` — forbids `*EPIJ_Qual <q>` when LHS terms hold (`*EPIJ_Medi <m>` plus `EPIJ_PSrc`/`EPIJ_FdSo`/`EPIJ_Ink_`). Evaluating non-media terms against lpoptions `*`-defaults reproduces the driver sets exactly.
- Canon: `*CNIJNameTblPath` + `*CNIJTableID` PPD keys → `cnb_<TableID>0.tbl` binary — 20-byte LE records `{0x30, 1, u32 0, u16 3, u16 flag, u32 mediaID(|0x10000=borderless), u16 0, u16 quality}` enumerating allowed `CNIJPrintQuality` values per `CNIJMediaType`.
## Proposed Fix
- `PrinterCapabilities` gains `qualityIDsByMediaType: [String: Set<String>]` + `qualities(forMediaType:)` (order-preserving, never-empty fallback).
- New `MediaQualityConstraints` resolver (ICCeryCore, pure): PPD `*UIConstraints` → Epson `PDEData.dat` → Canon tbl; first non-empty source wins; fail-open to unfiltered.
- `PrintSessionViewModel`: `availableQualities` computed; `selectedMediaType.didSet` clamps `selectedQuality` (default-if-allowed else first); seeding + panel apply-back + `makeRequest` honour the map.
- `Stage2View.qualityGroup` iterates `availableQualities`.
## Acceptance Criteria
- [x] Epson XP-55: plain paper shows exactly {Fast Economy, Economy, Normal, Fine}; Premium Semigloss shows {Draft, Quality, Best Quality}.
- [x] Canon Pro9500 II: photo media hide Fast/Normal(Fast); plain paper hides Fine.
- [x] Switching media with an invalid quality selected re-selects a valid one automatically.
- [x] Drivers with no constraint data show the full quality list (no regression).
- [x] `xcodebuild test -scheme ICCery -destination 'platform=macOS'` green.
## References
- #201 M12 native spool (Stage 2 overrides always win — unchanged).
- docs/issue-printer-quality-ignored.md
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Summary
The Stage 2 quality selector lists every quality token advertised by
lpoptions -l, regardless of the selected media type. Both the Epson (InkjetPrinter2, e.g. XP-55) and Canon (Pro9500 II) drivers restrict which quality values are valid per media — selecting an invalid combination makes the driver reject the job.Example (Epson XP-55): media 0 (plain) allows {301 Fast Economy, 302 Economy, 303 Normal, 304 Fine}; media 15 (Premium Semigloss) allows {305 Quality, 307 Best Quality, 308 Draft} — the picker currently shows all 7 for every media.
Root Cause Analysis
Stage2View.qualityGrouprendersworkflow.print.printerCaps.qualitiesunfiltered (Sources/ICCery/Stage2View.swift~L416-420).CupsService.capabilities(from:listings,ppd:)populatesqualitiesfrom the globallpoptions -llisting of the detected quality key (EPIJ_Qual/CNIJPrintQuality) — no media relationship (Packages/ICCeryCore/Sources/ICCeryCore/Print/CupsService.swift~L157-170).PrinterCapabilitieshas no media→quality field (PrinterModels.swift).*UIConstraints/*Constraints(absent in both PPDs);APPrinterPresetblocks (recommended defaults only, not validity); IPPprint-quality-supported/media-col-database(global lists only, no per-media matrix).Driver truth found:
*EPIJUIConstraint: <cond>|<forbidden choice>in<EPIJDriverBasePath>/Machine/<EPIJMachineBundleName>/Contents/Resources/PDEData.dat— forbids*EPIJ_Qual <q>when LHS terms hold (*EPIJ_Medi <m>plusEPIJ_PSrc/EPIJ_FdSo/EPIJ_Ink_). Evaluating non-media terms against lpoptions*-defaults reproduces the driver sets exactly.*CNIJNameTblPath+*CNIJTableIDPPD keys →cnb_<TableID>0.tblbinary — 20-byte LE records{0x30, 1, u32 0, u16 3, u16 flag, u32 mediaID(|0x10000=borderless), u16 0, u16 quality}enumerating allowedCNIJPrintQualityvalues perCNIJMediaType.Proposed Fix
PrinterCapabilitiesgainsqualityIDsByMediaType: [String: Set<String>]+qualities(forMediaType:)(order-preserving, never-empty fallback).MediaQualityConstraintsresolver (ICCeryCore, pure): PPD*UIConstraints→ EpsonPDEData.dat→ Canon tbl; first non-empty source wins; fail-open to unfiltered.PrintSessionViewModel:availableQualitiescomputed;selectedMediaType.didSetclampsselectedQuality(default-if-allowed else first); seeding + panel apply-back +makeRequesthonour the map.Stage2View.qualityGroupiteratesavailableQualities.Acceptance Criteria
xcodebuild test -scheme ICCery -destination 'platform=macOS'green.References