chore: bump MARKETING_VERSION to 2.0.3

press(forDuration:thenDragTo:) is inert on macOS — content-drag
scrolling is iOS-only, so the helper burned its 20s budget with the
gallery frame never moving. The scroll wheel is the mechanism the
platform supports: one scroll(byDeltaX:deltaY:) call on a coordinate
inside app.scrollViews["stage-2"] per poll iteration, negative deltaY
to move content up off the Dock zone.

AGENTS.md

@@ -93,6 +93,53 @@ codesign -dvv <sidecar>
 ```
 Universal (`ARCHS='arm64 x86_64' ONLY_ACTIVE_ARCH=NO`) is still required for release verification / packaging.
 
+## Remote test builds (runner host)
+Test builds done as part of change implementations run on the CI runner
+host, not the dev machine — the runner is a macOS 12.7.6 **x86_64** VM
+with Xcode 14.2, and CI failures there are often environmental and do not
+reproduce locally.
+
+- Host: `localadmin@192.168.0.172` (SSH, LAN). Runner daemon:
+  `gitea-runner daemon -c /opt/gitea-runner/config.yaml`.
+- Credentials: `~/Projects/build-host.env` defines `BUILD_HOST_USER` /
+  `BUILD_HOST_PASSWORD`. **Never read or print this file** — load it with
+  `set -a; source ~/Projects/build-host.env; set +a` so values stay in the
+  environment.
+- `sshpass` is installed (`/usr/local/bin/sshpass`). Feed the password via
+  the `SSHPASS` env var — never on the command line:
+  ```sh
+  SSHPASS="$BUILD_HOST_PASSWORD" sshpass -e ssh localadmin@192.168.0.172 '<cmd>'
+  SSHPASS="$BUILD_HOST_PASSWORD" sshpass -e scp <local> localadmin@192.168.0.172:<remote>
+  ```
+  First connection needs `-o StrictHostKeyChecking=accept-new`.
+- Remote checkout: `~/Projects/iccery-v2-mac` (anonymous HTTPS clone works;
+  full history needed by `scripts/version.sh`). Before testing, sync it to
+  the same base commit as the local work:
+  `git fetch origin && git checkout <local base sha>`, then `scp` each
+  locally-changed file over its remote counterpart (uncommitted work
+  transfers this way — there is no push).
+- `xcodegen` is **not** on PATH: prepend
+  `$HOME/.local/xcodegen/2.38.0/xcodegen/bin` (prebuilt 2.38.0 installed
+  by `scripts/ensure-host-tools.sh`; brew's formula needs Xcode 15.3,
+  impossible on macOS 12 — #109).
+- Mirror `.gitea/workflows/macos.yml` exactly, from the repo root with
+  `DERIVED=build/DerivedData-test`:
+  `scripts/ensure-host-tools.sh` → `xcodegen generate --spec project.yml`
+  → `eval "$(scripts/version.sh)"` → `xcodebuild build-for-testing
+  -scheme ICCery -destination 'platform=macOS' -derivedDataPath "$DERIVED"
+  -configuration Debug ARCHS="$(uname -m)" ONLY_ACTIVE_ARCH=NO
+  CODE_SIGNING_ALLOWED=YES CODE_SIGN_IDENTITY='-' MARKETING_VERSION=…
+  CURRENT_PROJECT_VERSION=… ICCERY_RELEASE_TAG=…` → codesign every
+  `*_PackageProduct.framework` under `$DERIVED/Build/Products/Debug`
+  (#119) → `xcodebuild test-without-building -xctestrun <ICCery*.xctestrun>
+  -only-testing:ICCeryCoreTests -destination 'platform=macOS'
+  -derivedDataPath "$DERIVED"`.
+- Run **unit tests only** (`ICCeryCoreTests`). UI tests need a logged-in
+  GUI session and fail environmentally on the VM (runs 29700, 29804,
+  42183) — do not use them for verification unless asked.
+- xcodebuild takes minutes — run the ssh command in a background shell
+  and poll rather than blocking.
+
 ## Private ColorSync SPI
 2-arg `(PMPrintSession, CFStringRef) -> OSStatus`. Never pass integer `1`.
 Modes: `AP_ApplicationColorMatching` then `ApplicationColorMatching`.

Packages/ICCeryCore/Sources/ICCeryCore/Print/CupsService.swift

@@ -115,9 +115,16 @@ public struct CupsService: Sendable {
 
     /// Trays / paper sizes / media types for a queue, with PPD
     /// `*Key id/Human:` enrichment when the queue's PPD is readable.
+    /// Also resolves the per-media quality map from vendor driver
+    /// data (`MediaQualityConstraints`, #214) — empty when the driver
+    /// exposes none.
     public func capabilities(for queue: String) async throws -> PrinterCapabilities {
         let listings = try await optionListings(for: queue)
-        return capabilities(from: listings, ppd: loadPPD(for: queue))
+        let ppd = loadPPD(for: queue)
+        var caps = capabilities(from: listings, ppd: ppd)
+        caps.qualityIDsByMediaType = MediaQualityConstraints.resolve(
+            listings: listings, ppd: ppd)
+        return caps
     }
 
     /// Pure mapping — extracted so fixture tests need no process.

Packages/ICCeryCore/Sources/ICCeryCore/Print/MediaQualityConstraints.swift

@@ -0,0 +1,329 @@
+import Foundation
+
+/// Per-media quality validity (#214): which of the queue's quality
+/// tokens the driver actually accepts for a given media type. The
+/// answer is not in `lpoptions -l`, IPP, or standard PPD
+/// `*UIConstraints` for the two driver families handled here —
+///
+///  - Epson InkjetPrinter2: `*EPIJUIConstraint: <cond>|<forbidden>`
+///    lines in the machine bundle's
+///    `…/Contents/Resources/PDEData.dat`. A rule forbids its RHS
+///    choice while every LHS `*<key> <value>` term holds. LHS keys
+///    other than the media key (`EPIJ_PSrc`, `EPIJ_FdSo`,
+///    `EPIJ_Ink_`, …) are evaluated against the queue's `lpoptions`
+///    defaults — reproducing the driver's PDE state when it opens.
+///  - Canon BJPrinter: `*CNIJNameTblPath` + `*CNIJTableID` PPD keys
+///    locate `cnb_<TableID>0.tbl`, a binary record DB whose 20-byte
+///    `{u16 0x30, u16 1, u32 0, u16 family, u16 flag, u32 mediaID,
+///    u16 0, u16 quality}` records enumerate the allowed
+///    `CNIJPrintQuality` values per `CNIJMediaType` (`mediaID`
+///    `| 0x10000` marks the borderless variant of the same media).
+///  - Generic: standard PPD `*UIConstraints:`/`*Constraints:` pairs
+///    (Gutenprint etc.) — first non-empty source wins.
+///
+/// Every parser is pure; file access is injected so tests need no
+/// installed driver. Failure or absence yields an empty map — callers
+/// treat that as "unconstrained" and keep the full quality list.
+public enum MediaQualityConstraints {
+
+    /// media-type id → allowed quality ids. Sources tried in order
+    /// (PPD constraints → Epson `PDEData.dat` → Canon `cnb` table);
+    /// the first source producing any entries wins.
+    public static func resolve(
+        listings: [CupsOptionListing],
+        ppd: String?,
+        readFile: (URL) -> Data? = { try? Data(contentsOf: $0) }
+    ) -> [String: Set<String>] {
+        let optionKeys = Set(listings.map(\.key))
+        guard let mediaKey = CupsParsers.detectMediaTypeKey(
+                optionKeys: optionKeys),
+              let qualityKey = CupsParsers.detectQualityKey(
+                optionKeys: optionKeys),
+              let mediaListing = listings.first(where: {
+                  $0.key == mediaKey }),
+              let qualityListing = listings.first(where: {
+                  $0.key == qualityKey })
+        else { return [:] }
+        let mediaIDs = Set(mediaListing.choices)
+        let qualityIDs = Set(qualityListing.choices)
+        let defaults = Dictionary(
+            listings.compactMap { l in l.defaultChoice.map { (l.key, $0) } },
+            uniquingKeysWith: { first, _ in first })
+        guard let ppd else { return [:] }
+
+        let ppdMap = allowedMap(
+            forbidden: ppdUIConstraints(
+                ppd, mediaKey: mediaKey, qualityKey: qualityKey,
+                mediaIDs: mediaIDs, qualityIDs: qualityIDs),
+            mediaIDs: mediaIDs, qualityIDs: qualityIDs)
+        if !ppdMap.isEmpty { return ppdMap }
+
+        if let url = epijPDEDataPath(ppd: ppd),
+           let data = readFile(url),
+           let dat = String(data: data, encoding: .utf8)
+                ?? String(data: data, encoding: .isoLatin1) {
+            let map = allowedMap(
+                forbidden: epijUIConstraints(
+                    dat, mediaKey: mediaKey, qualityKey: qualityKey,
+                    mediaIDs: mediaIDs, qualityIDs: qualityIDs,
+                    defaults: defaults),
+                mediaIDs: mediaIDs, qualityIDs: qualityIDs)
+            if !map.isEmpty { return map }
+        }
+
+        if let url = cnijTablePath(ppd: ppd),
+           let data = readFile(url) {
+            let map = cnijMediaQualityTable(
+                data, mediaIDs: mediaIDs, qualityIDs: qualityIDs)
+            if !map.isEmpty { return map }
+        }
+        return [:]
+    }
+
+    // MARK: - PPD keyword lookup
+
+    /// `*<key>: <value>` or `*<key>: "<value>"` → the value.
+    /// Exact key match — `*CNIJTableIDFoo:` must not satisfy a lookup
+    /// for `CNIJTableID`.
+    public static func ppdKeyword(_ ppd: String, _ key: String) -> String? {
+        for raw in ppd.split(separator: "\n") {
+            let line = raw.trimmingCharacters(in: .whitespaces)
+            guard line.hasPrefix("*\(key)") else { continue }
+            let rest = line.dropFirst(key.count + 1)
+            guard rest.first == ":" else { continue }
+            var value = rest.dropFirst()
+                .trimmingCharacters(in: .whitespaces)
+            if value.count >= 2,
+               value.hasPrefix("\""), value.hasSuffix("\"") {
+                value = String(value.dropFirst().dropLast())
+            }
+            if !value.isEmpty { return value }
+        }
+        return nil
+    }
+
+    // MARK: - Generic PPD constraints
+
+    /// `*UIConstraints:`/`*Constraints:` lines pair two conflicting
+    /// option choices; the ones naming both the media key and the
+    /// quality key produce forbidden (media, quality) pairs.
+    /// `*cupsUIConstraints` resolver triples do not match the
+    /// `*…Constraints:` prefixes, so they are skipped naturally.
+    public static func ppdUIConstraints(
+        _ ppd: String,
+        mediaKey: String,
+        qualityKey: String,
+        mediaIDs: Set<String>,
+        qualityIDs: Set<String>
+    ) -> [String: Set<String>] {
+        var forbidden: [String: Set<String>] = [:]
+        for raw in ppd.split(separator: "\n") {
+            var line = raw.trimmingCharacters(in: .whitespaces)
+            if line.hasPrefix("*UIConstraints:") {
+                line = String(line.dropFirst("*UIConstraints:".count))
+            } else if line.hasPrefix("*Constraints:") {
+                line = String(line.dropFirst("*Constraints:".count))
+            } else {
+                continue
+            }
+            let terms = constraintTerms(line)
+            guard let media = terms[mediaKey], mediaIDs.contains(media),
+                  let quality = terms[qualityKey],
+                  qualityIDs.contains(quality)
+            else { continue }
+            forbidden[media, default: []].insert(quality)
+        }
+        return forbidden
+    }
+
+    // MARK: - Epson PDEData.dat
+
+    /// `EPIJDriverBasePath` + `EPIJMachineBundleName` → the machine
+    /// bundle's `Contents/Resources/PDEData.dat` (uniform across the
+    /// InkjetPrinter2 family).
+    public static func epijPDEDataPath(ppd: String) -> URL? {
+        guard let base = ppdKeyword(ppd, "EPIJDriverBasePath"),
+              let bundle = ppdKeyword(ppd, "EPIJMachineBundleName")
+        else { return nil }
+        return URL(fileURLWithPath: base)
+            .appendingPathComponent("Machine")
+            .appendingPathComponent(bundle)
+            .appendingPathComponent("Contents/Resources/PDEData.dat")
+    }
+
+    /// `*EPIJUIConstraint:` forbidden-pair rules → (media, quality)
+    /// pairs the driver greys out. A rule *fires* when its LHS
+    /// `*<mediaKey>` term equals the media (absent media term →
+    /// applies to every media) and every other LHS term's value
+    /// equals that key's `lpoptions` default. A term whose key the
+    /// queue does not advertise counts as satisfied — hiding a usable
+    /// quality is a soft restriction, while showing an invalid one
+    /// re-creates the reported print failure.
+    public static func epijUIConstraints(
+        _ dat: String,
+        mediaKey: String,
+        qualityKey: String,
+        mediaIDs: Set<String>,
+        qualityIDs: Set<String>,
+        defaults: [String: String]
+    ) -> [String: Set<String>] {
+        var forbidden: [String: Set<String>] = [:]
+        for raw in dat.split(separator: "\n") {
+            let line = raw.trimmingCharacters(in: .whitespaces)
+            guard line.hasPrefix("*EPIJUIConstraint:"),
+                  let bar = line.firstIndex(of: "|")
+            else { continue }
+            let rhs = constraintTerms(
+                String(line[line.index(after: bar)...]))
+            guard let quality = rhs[qualityKey],
+                  qualityIDs.contains(quality)
+            else { continue }
+            let lhs = constraintTerms(
+                String(line[
+                    line.index(
+                        line.startIndex,
+                        offsetBy: "*EPIJUIConstraint:".count)..<bar]))
+            // Non-media terms must hold at the queue's defaults;
+            // a key absent from `defaults` is satisfied (see above).
+            let fires = lhs.allSatisfy { key, value in
+                key == mediaKey || value.isEmpty
+                    || (defaults[key].map { $0 == value } ?? true)
+            }
+            guard fires else { continue }
+            if let media = lhs[mediaKey] {
+                guard mediaIDs.contains(media) else { continue }
+                forbidden[media, default: []].insert(quality)
+            } else {
+                for media in mediaIDs {
+                    forbidden[media, default: []].insert(quality)
+                }
+            }
+        }
+        return forbidden
+    }
+
+    // MARK: - Canon cnb table
+
+    /// `CNIJNameTblPath` + `CNIJTableID` → `cnb_<TableID>0.tbl`.
+    public static func cnijTablePath(ppd: String) -> URL? {
+        guard let dir = ppdKeyword(ppd, "CNIJNameTblPath"),
+              let tableID = ppdKeyword(ppd, "CNIJTableID")
+        else { return nil }
+        return URL(fileURLWithPath: dir)
+            .appendingPathComponent("cnb_\(tableID)0.tbl")
+    }
+
+    /// Scans the Canon table for 20-byte LE records anchored on
+    /// `30 00 01 00 00 00 00 00`: `{u16 family, u16 flag,
+    /// u32 mediaID, u16 pad, u16 quality}` follows the anchor.
+    /// A row counts only when `pad == 0`, `mediaID & 0xFFFF` is a
+    /// listed media id, and `quality` is a listed quality id — so
+    /// unrelated tables cannot inject false entries. Records carry a
+    /// `family` field (0x03 on the Pro9500 II); the modal family is
+    /// used so sibling record layouts in the same file are ignored.
+    /// Returns allowed (not forbidden) sets directly.
+    public static func cnijMediaQualityTable(
+        _ data: Data,
+        mediaIDs: Set<String>,
+        qualityIDs: Set<String>
+    ) -> [String: Set<String>] {
+        let mediaNums = Set(mediaIDs.compactMap { UInt32($0) })
+        let qualityNums = Set(qualityIDs.compactMap { UInt16($0) })
+        guard !mediaNums.isEmpty, !qualityNums.isEmpty else {
+            return [:]
+        }
+        let anchor: [UInt8] = [0x30, 0x00, 0x01, 0x00,
+                               0x00, 0x00, 0x00, 0x00]
+        var rows: [UInt16: [(media: UInt32, quality: UInt16)]] = [:]
+        data.withUnsafeBytes { buffer in
+            guard let base = buffer.baseAddress else { return }
+            var i = 0
+            while i + 20 <= buffer.count {
+                if memcmp(base + i, anchor, anchor.count) == 0 {
+                    let family = readU16(base, i + 8)
+                    let media = readU32(base, i + 12)
+                    let pad = readU16(base, i + 16)
+                    let quality = readU16(base, i + 18)
+                    let baseMedia = media & 0xFFFF
+                    if pad == 0,
+                       mediaNums.contains(baseMedia),
+                       qualityNums.contains(quality) {
+                        rows[family, default: []].append(
+                            (baseMedia, quality))
+                    }
+                }
+                i += 2
+            }
+        }
+        guard let dominant = rows.max(by: { $0.value.count < $1.value.count })
+        else { return [:] }
+        var map: [String: Set<String>] = [:]
+        for row in dominant.value {
+            map[String(row.media), default: []].insert(String(row.quality))
+        }
+        // Keep strict subsets only — a media with the full set (or an
+        // empty one) is unconstrained as far as the UI is concerned.
+        map = map.filter { _, ids in
+            !ids.isEmpty && ids != qualityIDs
+        }
+        return map
+    }
+
+    // MARK: - Shared
+
+    /// `*<key> <value>` term extraction for both PPD and Epson
+    /// constraint syntax. A `*<key>` not followed by a value is a
+    /// wildcard term (empty-string value → always satisfied).
+    private static func constraintTerms(_ text: String) -> [String: String] {
+        var terms: [String: String] = [:]
+        let tokens = text.split(separator: " ").map(String.init)
+        var index = 0
+        while index < tokens.count {
+            guard tokens[index].hasPrefix("*") else {
+                index += 1
+                continue
+            }
+            let key = String(tokens[index].dropFirst())
+            if index + 1 < tokens.count,
+               !tokens[index + 1].hasPrefix("*") {
+                terms[key] = tokens[index + 1]
+                index += 2
+            } else {
+                terms[key] = ""
+                index += 1
+            }
+        }
+        return terms
+    }
+
+    /// forbidden (media → quality ids) → allowed map entries,
+    /// emitting only strict non-empty subsets: a media whose allowed
+    /// set is empty or equals the full roster is unconstrained as far
+    /// as the picker is concerned.
+    private static func allowedMap(
+        forbidden: [String: Set<String>],
+        mediaIDs: Set<String>,
+        qualityIDs: Set<String>
+    ) -> [String: Set<String>] {
+        var map: [String: Set<String>] = [:]
+        for media in mediaIDs {
+            let allowed = qualityIDs.subtracting(forbidden[media] ?? [])
+            if !allowed.isEmpty, allowed != qualityIDs {
+                map[media] = allowed
+            }
+        }
+        return map
+    }
+
+    private static func readU16(_ base: UnsafeRawPointer, _ offset: Int) -> UInt16 {
+        UInt16(base.load(fromByteOffset: offset, as: UInt8.self))
+            | UInt16(base.load(fromByteOffset: offset + 1, as: UInt8.self)) << 8
+    }
+
+    private static func readU32(_ base: UnsafeRawPointer, _ offset: Int) -> UInt32 {
+        UInt32(base.load(fromByteOffset: offset, as: UInt8.self))
+            | UInt32(base.load(fromByteOffset: offset + 1, as: UInt8.self)) << 8
+            | UInt32(base.load(fromByteOffset: offset + 2, as: UInt8.self)) << 16
+            | UInt32(base.load(fromByteOffset: offset + 3, as: UInt8.self)) << 24
+    }
+}

Packages/ICCeryCore/Sources/ICCeryCore/Print/PrinterModels.swift

@@ -107,6 +107,11 @@ public struct PrinterCapabilities: Codable, Equatable, Sendable {
     public var qualities: [PrinterQuality]
     /// The `*`-marked default choice from `lpoptions -l`, if any.
     public var qualityDefault: String?
+    /// Media-type id → the quality ids the driver accepts for it
+    /// (#214 — `MediaQualityConstraints`). Empty when the driver
+    /// exposes no per-media quality matrix; a missing entry means
+    /// "unconstrained" — show everything.
+    public var qualityIDsByMediaType: [String: Set<String>]
 
     public init(
         trays: [PrinterTray] = [],
@@ -115,7 +120,8 @@ public struct PrinterCapabilities: Codable, Equatable, Sendable {
         supportsOrientation: Bool = true,
         qualityKey: String? = nil,
         qualities: [PrinterQuality] = [],
-        qualityDefault: String? = nil
+        qualityDefault: String? = nil,
+        qualityIDsByMediaType: [String: Set<String>] = [:]
     ) {
         self.trays = trays
         self.paperSizes = paperSizes
@@ -124,6 +130,35 @@ public struct PrinterCapabilities: Codable, Equatable, Sendable {
         self.qualityKey = qualityKey
         self.qualities = qualities
         self.qualityDefault = qualityDefault
+        self.qualityIDsByMediaType = qualityIDsByMediaType
+    }
+
+    /// Qualities valid for `mediaID`, preserving the driver's listing
+    /// order (#180). Falls back to the full list when the driver has
+    /// no per-media data, the media is absent from the map, or the
+    /// filter would empty the picker (#214).
+    public func qualities(forMediaType mediaID: String?) -> [PrinterQuality] {
+        guard let mediaID,
+              let allowed = qualityIDsByMediaType[mediaID],
+              !allowed.isEmpty
+        else { return qualities }
+        let filtered = qualities.filter { allowed.contains($0.id) }
+        return filtered.isEmpty ? qualities : filtered
+    }
+
+    /// Whether `qualityID` is usable with `mediaID` — `true` whenever
+    /// the driver exposes no constraint for that media (#214). A
+    /// quality absent from `qualities` entirely is still allowed: a
+    /// driver-captured token can be legitimate even when `lpoptions`
+    /// never listed it.
+    public func allowsQuality(
+        _ qualityID: String, forMediaType mediaID: String?
+    ) -> Bool {
+        guard let mediaID,
+              let allowed = qualityIDsByMediaType[mediaID],
+              !allowed.isEmpty
+        else { return true }
+        return allowed.contains(qualityID)
     }
 }
 

README.md

@@ -16,7 +16,7 @@ as AGPLv3 child processes. The GUI never `dlopen`s or links Argyll.
 |---|---|
 | Product | ICCery v2 for macOS |
 | Bundle | `com.gronod.iccery2` |
-| Version | 2.0.0 |
+| Version | 2.0.3 |
 | Floor | macOS 12.0 Monterey, universal `arm64` + `x86_64` |
 | Toolchain | Xcode 14.2 / Swift 5.7 (project `SWIFT_VERSION` is 5.0) |
 | CI | Gitea Actions `macos-12` runner |

Sources/ICCery/AppEnvironment.swift

@@ -24,6 +24,7 @@ struct AppEnvironment: Sendable {
             .map { URL(fileURLWithPath: $0) }
         var bundledRoot = AppPaths.bundledArgyllDir
         var cupsDir = URL(fileURLWithPath: "/usr/bin")
+        var ppdDir = URL(fileURLWithPath: "/etc/cups/ppd")
         #if DEBUG
         if let dir = environment["ICCERY_ARGYLL_BINARY_DIR"], !dir.isEmpty {
             overrideDir = URL(fileURLWithPath: dir)
@@ -34,6 +35,11 @@ struct AppEnvironment: Sendable {
         if let dir = environment["ICCERY_CUPS_BIN_DIR"], !dir.isEmpty {
             cupsDir = URL(fileURLWithPath: dir)
         }
+        // #214 — fixture PPD dir lets UI tests exercise the media→
+        // quality constraint resolver without installed drivers.
+        if let dir = environment["ICCERY_CUPS_PPD_DIR"], !dir.isEmpty {
+            ppdDir = URL(fileURLWithPath: dir)
+        }
         #endif
         return AppEnvironment(
             stateStore: WizardStateStore(),
@@ -46,7 +52,7 @@ struct AppEnvironment: Sendable {
             ),
             cupsService: CupsService(
                 processManager: .shared,
-                binaryDir: cupsDir),
+                binaryDir: cupsDir, ppdDir: ppdDir),
             historyStore: VerificationHistoryStore(),
             mediaStore: MediaLibraryStore(),
             recentProjectsStore: RecentProjectsStore()

Sources/ICCery/Print/PrintSessionViewModel.swift

@@ -25,7 +25,15 @@ final class PrintSessionViewModel: ObservableObject {
     }
     @Published var printerCaps = PrinterCapabilities()
     @Published var selectedTray: Int?
-    @Published var selectedMediaType: String?
+    @Published var selectedMediaType: String? {
+        didSet {
+            // A media switch can invalidate the current quality pick —
+            // re-clamp into the driver's allowed set (#214).
+            if selectedMediaType != oldValue {
+                clampQualityToMedia()
+            }
+        }
+    }
     /// `PrinterPaperSize.id` — `0` is the synthetic custom entry (#183).
     @Published var selectedPaperSize: Int?
     /// Print-quality option token, e.g. `"303"` (#183).
@@ -123,9 +131,16 @@ final class PrintSessionViewModel: ObservableObject {
             if selectedTray == nil {
                 selectedTray = printerCaps.trays.first?.id
             }
+            // Quality seeds inside the selected media's allowed set
+            // (#214): driver default when valid there, else the first
+            // allowed choice.
             if selectedQuality == nil {
-                selectedQuality = printerCaps.qualityDefault
-                    ?? printerCaps.qualities.first?.id
+                let allowed = availableQualities
+                selectedQuality = printerCaps.qualityDefault.flatMap { d in
+                    allowed.contains(where: { $0.id == d }) ? d : nil
+                } ?? allowed.first?.id
+            } else {
+                clampQualityToMedia()
             }
             // Caps reload is a re-mirror trigger for the paper picker
             // (#183 E4) — pageSize + printer changes route here too.
@@ -137,6 +152,32 @@ final class PrintSessionViewModel: ObservableObject {
 
     // MARK: - Paper / quality selection (#183)
 
+    /// The quality picker's source (#214): `printerCaps.qualities`
+    /// filtered to what the driver accepts for `selectedMediaType`.
+    /// Equals the full list whenever the queue exposes no per-media
+    /// quality matrix — and never empty while `qualities` is not.
+    var availableQualities: [PrinterQuality] {
+        printerCaps.qualities(forMediaType: selectedMediaType)
+    }
+
+    /// Keep `selectedQuality` inside the allowed set for the current
+    /// media: keep the pick when still valid, else the driver default
+    /// when valid, else the first allowed choice (#214).
+    private func clampQualityToMedia() {
+        let allowed = availableQualities
+        guard !allowed.isEmpty else { return }
+        if let quality = selectedQuality,
+           allowed.contains(where: { $0.id == quality }) {
+            return
+        }
+        if let fallback = printerCaps.qualityDefault,
+           allowed.contains(where: { $0.id == fallback }) {
+            selectedQuality = fallback
+        } else {
+            selectedQuality = allowed.first?.id
+        }
+    }
+
     /// Seed `selectedPaperSize` from Stage 1's `workflow.pageSize`:
     /// a capability whose name matches `pageSize.rawValue` → its id;
     /// `.custom` → the synthetic `Custom.<pt>x<pt>` entry (`id: 0`);
@@ -230,7 +271,12 @@ final class PrintSessionViewModel: ObservableObject {
                        .first(where: { $0.name == paper }) {
                     selectedPaperSize = match.id
                 }
-                if let quality = result.properties.options.quality {
+                // A captured quality the driver rejects for the
+                // (possibly just-captured) media is dropped — keeping
+                // it would only re-create a failed print (#214).
+                if let quality = result.properties.options.quality,
+                   printerCaps.allowsQuality(
+                       quality, forMediaType: selectedMediaType) {
                     selectedQuality = quality
                 }
                 if let orientation = result.properties.options.orientation {
@@ -358,6 +404,15 @@ final class PrintSessionViewModel: ObservableObject {
         let optionKeys = (try? await environment.cupsService
             .optionKeys(for: queue)) ?? []
         attachDiagnostics()
+        // Defence-in-depth (#214): an invalid media+quality pair can
+        // never reach the ticket — substitute the first allowed
+        // quality when the pick is stale (UI already clamps; this is
+        // the last gate before the driver).
+        var quality = selectedQuality
+        if let q = quality,
+           !printerCaps.allowsQuality(q, forMediaType: selectedMediaType) {
+            quality = availableQualities.first?.id ?? q
+        }
         return TargetPrintRequest(
             queue: queue,
             displayName: printers.first { $0.name == queue }?.displayName,
@@ -373,7 +428,7 @@ final class PrintSessionViewModel: ObservableObject {
                 paperSize: selectedPaperSizeToken,
                 mediaType: selectedMediaType,
                 qualityKey: printerCaps.qualityKey,
-                quality: selectedQuality,
+                quality: quality,
                 orientation: printOrientation),
             optionKeys: optionKeys)
     }

Sources/ICCery/Stage2View.swift

@@ -410,11 +410,13 @@ struct Stage2View: View {
         .accessibilityIdentifier("paperSizeGroup")
     }
 
-    /// Quality picker — driver tokens with PPD-enriched labels (#183).
+    /// Quality picker — driver tokens with PPD-enriched labels (#183),
+    /// filtered to what the driver accepts for the selected media
+    /// (#214).
     private var qualityGroup: some View {
         VStack(alignment: .leading, spacing: 4) {
             Picker("Quality", selection: $workflow.print.selectedQuality) {
-                ForEach(workflow.print.printerCaps.qualities, id: \.id) {
+                ForEach(workflow.print.availableQualities, id: \.id) {
                     Text($0.name).tag(Optional($0.id))
                 }
             }

Tests/ICCeryCoreTests/MediaQualityConstraintsTests.swift

@@ -0,0 +1,311 @@
+import XCTest
+import Foundation
+@testable import ICCeryCore
+
+/// #214 — media → allowed-quality resolution: generic PPD
+/// `*UIConstraints`, Epson `PDEData.dat` `*EPIJUIConstraint` rules,
+/// and the Canon `cnb_*.tbl` record scan. All fixtures inline /
+/// injected — no installed drivers touched.
+final class MediaQualityConstraintsTests: XCTestCase {
+
+    /// Epson-flavoured `lpoptions -l` listings: the XP-55 advertises
+    /// the conditional LHS keys (`EPIJ_PSrc`/`EPIJ_FdSo`/`EPIJ_Ink_`)
+    /// with defaults 2/2/1.
+    private var epsonListings: [CupsOptionListing] {
+        CupsParsers.lpoptionsList("""
+            PageSize/Media Size: 4x6 5x7 *A4 Letter
+            EPIJ_Medi/Media Type: *0 92 13 15 145 12 2 75 26 76 93
+            EPIJ_PSrc/Page Setup: *2 3 25
+            EPIJ_FdSo/Paper Source: *2 3 12
+            EPIJ_Ink_/Grayscale: *1 0
+            EPIJ_Qual/Print Quality: 301 302 *303 308 304 305 307
+            """)
+    }
+
+    private var epsonQualityIDs: Set<String> {
+        ["301", "302", "303", "304", "305", "307", "308"]
+    }
+
+    // MARK: - ppdKeyword
+
+    func testPPDKeywordQuotedAndBare() {
+        let ppd = """
+            *EPIJDriverBasePath: "/Library/Printers/EPSON/InkjetPrinter2"
+            *EPIJMachineBundleName: "EP14C0605W.data"
+            *CNIJTableID: 354
+            *CNIJTableIDFoo: 999
+            """
+        XCTAssertEqual(
+            MediaQualityConstraints.ppdKeyword(ppd, "EPIJDriverBasePath"),
+            "/Library/Printers/EPSON/InkjetPrinter2")
+        XCTAssertEqual(
+            MediaQualityConstraints.ppdKeyword(ppd, "EPIJMachineBundleName"),
+            "EP14C0605W.data")
+        XCTAssertEqual(
+            MediaQualityConstraints.ppdKeyword(ppd, "CNIJTableID"), "354")
+        // Prefix-safety: CNIJTableIDFoo must not satisfy the lookup.
+        XCTAssertNil(MediaQualityConstraints.ppdKeyword(ppd, "CNIJTableIDX"))
+        XCTAssertNil(MediaQualityConstraints.ppdKeyword(ppd, "Missing"))
+    }
+
+    // MARK: - Path derivation
+
+    func testEPIJPDEDataPath() {
+        let ppd = """
+            *EPIJDriverBasePath: "/Library/Printers/EPSON/InkjetPrinter2"
+            *EPIJMachineBundleName: "EP14C0605W.data"
+            """
+        XCTAssertEqual(
+            MediaQualityConstraints.epijPDEDataPath(ppd: ppd)?.path,
+            "/Library/Printers/EPSON/InkjetPrinter2/Machine/"
+                + "EP14C0605W.data/Contents/Resources/PDEData.dat")
+        XCTAssertNil(MediaQualityConstraints.epijPDEDataPath(
+            ppd: "*CNIJTableID: 354\n"))
+    }
+
+    func testCNIJTablePath() {
+        let ppd = """
+            *CNIJNameTblPath: "/Library/Printers/Canon/BJPrinter/Resources/Database/CIJPro9500IIseries.db/Contents/Resources"
+            *CNIJTableID: 354
+            """
+        XCTAssertEqual(
+            MediaQualityConstraints.cnijTablePath(ppd: ppd)?.path,
+            "/Library/Printers/Canon/BJPrinter/Resources/Database/"
+                + "CIJPro9500IIseries.db/Contents/Resources/cnb_3540.tbl")
+        XCTAssertNil(MediaQualityConstraints.cnijTablePath(
+            ppd: "*EPIJMachineBundleName: \"x\"\n"))
+    }
+
+    // MARK: - Generic PPD UIConstraints
+
+    func testPPDUIConstraintsBothOrders() {
+        let ppd = """
+            *UIConstraints: *MediaType Glossy *PrintQuality Draft
+            *UIConstraints: *PrintQuality Draft *MediaType Matte
+            *Constraints: *MediaType Glossy *PrintQuality Low
+            *UIConstraints: *InputSlot Rear *PrintQuality Draft
+            """
+        let forbidden = MediaQualityConstraints.ppdUIConstraints(
+            ppd, mediaKey: "MediaType", qualityKey: "PrintQuality",
+            mediaIDs: ["Glossy", "Matte"],
+            qualityIDs: ["Draft", "Low", "High"])
+        XCTAssertEqual(forbidden["Glossy"], ["Draft", "Low"])
+        XCTAssertEqual(forbidden["Matte"], ["Draft"])
+    }
+
+    // MARK: - Epson EPIJUIConstraint
+
+    /// Realistic XP-55 fragment: pure-media rules plus conditional
+    /// rules on `EPIJ_PSrc`/`EPIJ_Ink_` evaluated against defaults.
+    func testEPIJConstraintsAgainstDefaults() {
+        let dat = """
+            *EPIJUIConstraint: *EPIJ_Medi 0|*EPIJ_Qual 305
+            *EPIJUIConstraint: *EPIJ_Medi 0|*EPIJ_Qual 307
+            *EPIJUIConstraint: *EPIJ_Medi 0|*EPIJ_Qual 308
+            *EPIJUIConstraint: *EPIJ_Medi 15|*EPIJ_Qual 301
+            *EPIJUIConstraint: *EPIJ_Medi 15|*EPIJ_Qual 302
+            *EPIJUIConstraint: *EPIJ_Medi 15|*EPIJ_Qual 303
+            *EPIJUIConstraint: *EPIJ_Medi 15|*EPIJ_Qual 304
+            *EPIJUIConstraint: *EPIJ_PSrc 3 *EPIJ_Medi 0|*EPIJ_Qual 301
+            *EPIJUIConstraint: *EPIJ_PSrc 2 *EPIJ_Medi 0 *EPIJ_Ink_ 0|*EPIJ_Qual 302
+            *EPIJUIConstraint: *EPIJ_Medi 92|*EPIJ_Qual 301
+            *EPIJUIConstraint: *EPIJ_PSrc 3 *EPIJ_Medi 92|*EPIJ_Qual 999
+            """
+        let forbidden = MediaQualityConstraints.epijUIConstraints(
+            dat, mediaKey: "EPIJ_Medi", qualityKey: "EPIJ_Qual",
+            mediaIDs: ["0", "15", "92"], qualityIDs: epsonQualityIDs,
+            defaults: ["EPIJ_PSrc": "2", "EPIJ_Ink_": "1"])
+        // Media 0: pure rules forbid 305/307/308; the PSrc=3 rule is
+        // inert at default PSrc=2 (301 survives); the PSrc=2 rule
+        // additionally requires Ink_=0 — default is 1, so inert too
+        // (302 survives).
+        XCTAssertEqual(forbidden["0"], ["305", "307", "308"])
+        XCTAssertEqual(forbidden["15"], ["301", "302", "303", "304"])
+        // 999 is not a listed quality id — ignored outright.
+        XCTAssertEqual(forbidden["92"], ["301"])
+    }
+
+    /// A conditional rule whose extra terms all match the defaults
+    /// fires like a pure-media rule.
+    func testEPIJConditionalRuleFiresAtDefaults() {
+        let dat = """
+            *EPIJUIConstraint: *EPIJ_PSrc 2 *EPIJ_Medi 0|*EPIJ_Qual 304
+            """
+        let forbidden = MediaQualityConstraints.epijUIConstraints(
+            dat, mediaKey: "EPIJ_Medi", qualityKey: "EPIJ_Qual",
+            mediaIDs: ["0"], qualityIDs: epsonQualityIDs,
+            defaults: ["EPIJ_PSrc": "2"])
+        XCTAssertEqual(forbidden["0"], ["304"])
+    }
+
+    /// A rule with no media term applies to every listed media; a term
+    /// on a key the queue does not advertise counts as satisfied
+    /// (conservative-forbid — #214 semantics).
+    func testEPIJGlobalAndUnknownKeyRules() {
+        let dat = """
+            *EPIJUIConstraint: *EPIJ_Ink_ 1|*EPIJ_Qual 305
+            *EPIJUIConstraint: *EPIJ_Mode 9 *EPIJ_Medi 0|*EPIJ_Qual 307
+            """
+        let forbidden = MediaQualityConstraints.epijUIConstraints(
+            dat, mediaKey: "EPIJ_Medi", qualityKey: "EPIJ_Qual",
+            mediaIDs: ["0", "15"], qualityIDs: epsonQualityIDs,
+            defaults: ["EPIJ_Ink_": "1"])
+        // Global rule: Ink_=1 matches default → 305 forbidden on both.
+        XCTAssertTrue(forbidden["0"]!.contains("305"))
+        XCTAssertTrue(forbidden["15"]!.contains("305"))
+        // EPIJ_Mode is unlisted → satisfied → (0, 307) forbidden too.
+        XCTAssertTrue(forbidden["0"]!.contains("307"))
+    }
+
+    /// The end-to-end XP-55 expectation through `resolve` — the exact
+    /// sets the user reported from the driver PDE.
+    func testResolveEpsonProducesDriverSets() {
+        let dat = """
+            *EPIJUIConstraint: *EPIJ_Medi 0|*EPIJ_Qual 305
+            *EPIJUIConstraint: *EPIJ_Medi 0|*EPIJ_Qual 307
+            *EPIJUIConstraint: *EPIJ_Medi 0|*EPIJ_Qual 308
+            *EPIJUIConstraint: *EPIJ_Medi 92|*EPIJ_Qual 301
+            *EPIJUIConstraint: *EPIJ_Medi 92|*EPIJ_Qual 302
+            *EPIJUIConstraint: *EPIJ_Medi 92|*EPIJ_Qual 303
+            *EPIJUIConstraint: *EPIJ_Medi 92|*EPIJ_Qual 304
+            *EPIJUIConstraint: *EPIJ_Medi 92|*EPIJ_Qual 308
+            *EPIJUIConstraint: *EPIJ_Medi 15|*EPIJ_Qual 301
+            *EPIJUIConstraint: *EPIJ_Medi 15|*EPIJ_Qual 302
+            *EPIJUIConstraint: *EPIJ_Medi 15|*EPIJ_Qual 303
+            *EPIJUIConstraint: *EPIJ_Medi 15|*EPIJ_Qual 304
+            """
+        let ppd = """
+            *EPIJDriverBasePath: "/drivers/epson"
+            *EPIJMachineBundleName: "EP14C0605W.data"
+            """
+        let datURL = URL(fileURLWithPath:
+            "/drivers/epson/Machine/EP14C0605W.data/"
+                + "Contents/Resources/PDEData.dat")
+        let map = MediaQualityConstraints.resolve(
+            listings: epsonListings, ppd: ppd,
+            readFile: { $0 == datURL ? dat.data(using: .utf8) : nil })
+        // Plain paper: Fast Economy / Economy / Normal / Fine.
+        XCTAssertEqual(map["0"], ["301", "302", "303", "304"])
+        // Premium Semigloss: Quality / Best Quality / Draft.
+        XCTAssertEqual(map["15"], ["305", "307", "308"])
+        // Ultra Glossy drops Fast Economy…Fine and Draft.
+        XCTAssertEqual(map["92"], ["305", "307"])
+        // Unconstrained media (no rules) produce no entry.
+        XCTAssertNil(map["13"])
+    }
+
+    // MARK: - Canon cnb table
+
+    /// Builds one 20-byte Canon record: `30 00 01 00 00 00 00 00`,
+    /// `family:u16`, `flag:u16`, `media:u32`, `pad:u16`, `quality:u16`.
+    private func canonRecord(
+        family: UInt16 = 3, flag: UInt16 = 0,
+        media: UInt32, pad: UInt16 = 0, quality: UInt16
+    ) -> Data {
+        var d = Data([0x30, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00])
+        d.append(contentsOf: [UInt8(family & 0xFF), UInt8(family >> 8)])
+        d.append(contentsOf: [UInt8(flag & 0xFF), UInt8(flag >> 8)])
+        d.append(contentsOf: [
+            UInt8(media & 0xFF), UInt8((media >> 8) & 0xFF),
+            UInt8((media >> 16) & 0xFF), UInt8((media >> 24) & 0xFF)])
+        d.append(contentsOf: [UInt8(pad & 0xFF), UInt8(pad >> 8)])
+        d.append(contentsOf: [UInt8(quality & 0xFF), UInt8(quality >> 8)])
+        return d
+    }
+
+    func testCNBTableScan() {
+        var data = Data()
+        // Junk prefix — even length keeps the records 2-byte aligned.
+        data.append(contentsOf: [0xFF, 0x00])
+        // media 0 → {0, 10, 15, 20} across flag 0/1 variants.
+        for q: UInt16 in [10, 15, 20, 0] {
+            data.append(canonRecord(media: 0, quality: q))
+        }
+        data.append(canonRecord(flag: 1, media: 0, quality: 10))
+        // media 50 → {0, 5, 10}; plus its borderless variant 0x10032.
+        for q: UInt16 in [0, 5, 10] {
+            data.append(canonRecord(media: 50, quality: q))
+        }
+        data.append(canonRecord(media: 0x10032, quality: 0))
+        // Noise: unknown media, unknown quality, nonzero pad, and a
+        // different record family that must lose the modal vote.
+        data.append(canonRecord(media: 999, quality: 5))
+        data.append(canonRecord(media: 50, quality: 7))
+        data.append(canonRecord(media: 50, pad: 1, quality: 15))
+        data.append(canonRecord(family: 9, media: 50, quality: 15))
+        data.append(Data([0x11, 0x22, 0x33]))
+
+        let map = MediaQualityConstraints.cnijMediaQualityTable(
+            data,
+            mediaIDs: ["0", "50", "42"],
+            qualityIDs: ["0", "5", "10", "15", "20"])
+        XCTAssertEqual(map["0"], ["0", "10", "15", "20"])
+        XCTAssertEqual(map["50"], ["0", "5", "10"])
+        XCTAssertNil(map["42"])
+    }
+
+    func testCNBGarbageFailsOpen() {
+        let map = MediaQualityConstraints.cnijMediaQualityTable(
+            Data((0..<4096).map { _ in UInt8.random(in: 0...255) }),
+            mediaIDs: ["0", "50"], qualityIDs: ["0", "5", "10"])
+        XCTAssertTrue(map.isEmpty)
+    }
+
+    // MARK: - resolve ordering / fallback
+
+    func testResolvePrefersPPDConstraints() {
+        let ppd = """
+            *UIConstraints: *EPIJ_Medi 0 *EPIJ_Qual 305
+            *EPIJDriverBasePath: "/should/not/be/read"
+            *EPIJMachineBundleName: "x.data"
+            """
+        var reads = 0
+        let map = MediaQualityConstraints.resolve(
+            listings: epsonListings, ppd: ppd,
+            readFile: { _ in reads += 1; return nil })
+        XCTAssertEqual(map["0"], epsonQualityIDs.subtracting(["305"]))
+        // The Epson path is never touched once PPD constraints hit.
+        XCTAssertEqual(reads, 0)
+    }
+
+    func testResolveNoPPDOrKeysFailsOpen() {
+        XCTAssertTrue(MediaQualityConstraints.resolve(
+            listings: epsonListings, ppd: nil).isEmpty)
+        // No media key in the roster → no map.
+        XCTAssertTrue(MediaQualityConstraints.resolve(
+            listings: CupsParsers.lpoptionsList(
+                "PageSize/Media Size: *A4 Letter\n"),
+            ppd: "*CNIJTableID: 354\n").isEmpty)
+    }
+
+    // MARK: - PrinterCapabilities accessors
+
+    func testCapabilitiesAccessorFallbacks() {
+        var caps = PrinterCapabilities(
+            mediaTypes: [
+                PrinterMediaType(id: "0", name: "Plain"),
+                PrinterMediaType(id: "15", name: "Semigloss"),
+            ],
+            qualities: ["301", "302", "303", "308", "304", "305", "307"]
+                .map { PrinterQuality(id: $0, name: "Q\($0)") })
+        // No map → everything, in driver order (#180).
+        XCTAssertEqual(caps.qualities(forMediaType: "0").map(\.id),
+            ["301", "302", "303", "308", "304", "305", "307"])
+        XCTAssertTrue(caps.allowsQuality("305", forMediaType: "0"))
+
+        caps.qualityIDsByMediaType = [
+            "0": ["301", "302", "303", "304"],
+            "15": ["305", "307", "308"],
+        ]
+        XCTAssertEqual(caps.qualities(forMediaType: "0").map(\.id),
+            ["301", "302", "303", "304"])
+        // Driver order preserved — 308 sits before 304 in lpoptions.
+        XCTAssertEqual(caps.qualities(forMediaType: "15").map(\.id),
+            ["308", "305", "307"])
+        XCTAssertTrue(caps.allowsQuality("308", forMediaType: "15"))
+        XCTAssertFalse(caps.allowsQuality("308", forMediaType: "0"))
+        // Unknown media → unconstrained.
+        XCTAssertEqual(caps.qualities(forMediaType: "99").count, 7)
+        XCTAssertTrue(caps.allowsQuality("305", forMediaType: nil))
+    }
+}

Tests/ICCeryCoreTests/PrintSessionViewModelTests.swift

@@ -408,6 +408,169 @@ final class PrintSessionViewModelTests: XCTestCase {
         XCTAssertTrue(workflow.print.capturedCupsOptions.isEmpty)
     }
 
+    // MARK: - Media-aware quality filtering (#214)
+
+    /// Constrains the loaded fixture caps: `Stationery` allows
+    /// {301,302,303,304}, `Glossy` allows {305,307}, `Matte` is
+    /// unconstrained. Mirrors the Epson `EPIJUIConstraint` matrix.
+    private func constrainCaps(_ vm: PrintSessionViewModel) {
+        var caps = vm.printerCaps
+        caps.qualityIDsByMediaType = [
+            "Stationery": ["301", "302", "303", "304"],
+            "Glossy": ["305", "307"],
+        ]
+        vm.printerCaps = caps
+    }
+
+    /// Media switch → an invalid quality pick re-seeds to the first
+    /// allowed choice; the picker source shrinks to the media's set.
+    func testMediaChangeClampsInvalidQuality() async {
+        let workflow = makeWorkflow()
+        await loadCaps(workflow.print)
+        constrainCaps(workflow.print)
+        XCTAssertEqual(workflow.print.selectedMediaType, "Stationery")
+        XCTAssertEqual(workflow.print.selectedQuality, "303")
+
+        workflow.print.selectedMediaType = "Glossy"
+        XCTAssertEqual(workflow.print.selectedQuality, "305")
+        XCTAssertEqual(workflow.print.availableQualities.map(\.id),
+            ["305", "307"])
+    }
+
+    /// A still-valid pick survives a media switch; an unconstrained
+    /// media keeps the pick too.
+    func testMediaChangeKeepsValidQuality() async {
+        let workflow = makeWorkflow()
+        await loadCaps(workflow.print)
+        constrainCaps(workflow.print)
+        workflow.print.selectedQuality = "302"
+
+        workflow.print.selectedMediaType = "Matte" // unconstrained
+        XCTAssertEqual(workflow.print.selectedQuality, "302")
+
+        workflow.print.selectedMediaType = "Glossy" // 302 invalid
+        XCTAssertEqual(workflow.print.selectedQuality, "305")
+        workflow.print.selectedQuality = "307"
+        workflow.print.selectedMediaType = "Stationery" // 307 invalid
+        // Driver default 303 is allowed there → preferred over first.
+        XCTAssertEqual(workflow.print.selectedQuality, "303")
+    }
+
+    /// Seeding lands inside the allowed set even when the driver
+    /// default quality is invalid for the first media — end to end
+    /// through `CupsService.capabilities(for:)` + a fixture
+    /// `PDEData.dat` (#214).
+    func testQualitySeedRespectsMediaMap() async throws {
+        let ppdDir = env.root.appendingPathComponent("ppd")
+        let epsonRoot = env.root.appendingPathComponent("epson-driver")
+        let datDir = epsonRoot.appendingPathComponent(
+            "Machine/M.data/Contents/Resources")
+        try FileManager.default.createDirectory(
+            at: ppdDir, withIntermediateDirectories: true)
+        try FileManager.default.createDirectory(
+            at: datDir, withIntermediateDirectories: true)
+        try """
+            *EPIJDriverBasePath: "\(epsonRoot.path)"
+            *EPIJMachineBundleName: "M.data"
+            """.write(
+                to: ppdDir.appendingPathComponent("Mock_Q.ppd"),
+                atomically: true, encoding: .utf8)
+        // Stationery forbids everything except 305/307 — including the
+        // `lpoptions` default 303.
+        try """
+            *EPIJUIConstraint: *MediaType Stationery|*EPIJ_Qual 301
+            *EPIJUIConstraint: *MediaType Stationery|*EPIJ_Qual 302
+            *EPIJUIConstraint: *MediaType Stationery|*EPIJ_Qual 303
+            *EPIJUIConstraint: *MediaType Stationery|*EPIJ_Qual 308
+            *EPIJUIConstraint: *MediaType Stationery|*EPIJ_Qual 304
+            """.write(
+                to: datDir.appendingPathComponent("PDEData.dat"),
+                atomically: true, encoding: .utf8)
+
+        var environment = env.environment
+        environment = AppEnvironment(
+            stateStore: environment.stateStore,
+            settingsStore: environment.settingsStore,
+            presetStore: environment.presetStore,
+            runner: environment.runner,
+            cupsService: CupsService(
+                processManager: ProcessManager(),
+                binaryDir: binDir, ppdDir: ppdDir),
+            historyStore: environment.historyStore,
+            mediaStore: environment.mediaStore,
+            recentProjectsStore: environment.recentProjectsStore)
+        let workflow = TargetWorkflowViewModel(environment: environment)
+        workflow.print.selectedPrinter = "Mock_Q"
+        await workflow.print.reloadSelectedCapabilities()
+
+        XCTAssertEqual(workflow.print.selectedMediaType, "Stationery")
+        XCTAssertEqual(workflow.print.printerCaps
+            .qualityIDsByMediaType["Stationery"], ["305", "307"])
+        // 303 is the driver default but invalid on Stationery → 305.
+        XCTAssertEqual(workflow.print.selectedQuality, "305")
+        XCTAssertEqual(workflow.print.availableQualities.map(\.id),
+            ["305", "307"])
+    }
+
+    /// No constraint map → every quality stays selectable on every
+    /// media (the pre-#214 behaviour, by design for unknown drivers).
+    func testUnconstrainedDriverKeepsAllQualities() async {
+        let workflow = makeWorkflow()
+        await loadCaps(workflow.print)
+        workflow.print.selectedMediaType = "Glossy"
+        XCTAssertEqual(workflow.print.availableQualities.map(\.id),
+            ["301", "302", "303", "308", "304", "305", "307"])
+        XCTAssertEqual(workflow.print.selectedQuality, "303")
+    }
+
+    /// A captured quality invalid for the captured media is dropped —
+    /// the clamped selection stands.
+    func testPanelResultInvalidQualityDropped() async throws {
+        setenv("ICCERY_UI_TESTING", "1", 1)
+        setenv("ICCERY_TEST_PRINT_PANEL", "ok", 1)
+        setenv("ICCERY_TEST_PANEL_OPTIONS", "EPIJ_Qual=305", 1)
+        defer {
+            unsetenv("ICCERY_UI_TESTING")
+            unsetenv("ICCERY_TEST_PRINT_PANEL")
+            unsetenv("ICCERY_TEST_PANEL_OPTIONS")
+        }
+
+        let workflow = makeWorkflow()
+        await loadCaps(workflow.print)
+        constrainCaps(workflow.print) // Stationery forbids 305
+        XCTAssertEqual(workflow.print.selectedQuality, "303")
+
+        workflow.print.openPrinterPreferences()
+        await waitForNotice(workflow.print, containing: "Settings captured")
+        XCTAssertEqual(workflow.print.selectedQuality, "303")
+    }
+
+    /// `makeRequest` substitutes a stale-invalid quality before the
+    /// ticket is written — the last gate before the driver (#214).
+    func testSpoolSubstitutesStaleQuality() async throws {
+        let workflow = makeWorkflow()
+        await loadCaps(workflow.print)
+        constrainCaps(workflow.print)
+        workflow.print.selectedMediaType = "Glossy"
+        workflow.print.selectedQuality = "308" // stale, invalid
+        workflow.print.spooler = RecordingTargetSpooler(
+            logURL: spoolLogURL)
+
+        let tiff = env.root.appendingPathComponent("page1.tif")
+        try Data([0x49, 0x49]).write(to: tiff)
+        let page = GalleryPage(
+            index: 0,
+            page: PrinttargPage(
+                filename: "page1.tif", patches: 10,
+                widthMm: 210, heightMm: 297),
+            fileURL: tiff, previewPNG: nil, previewError: nil)
+        workflow.print.printPage(page)
+
+        let log = await waitForFile(spoolLogURL)
+        XCTAssertTrue(log.contains("EPIJ_Qual=305"), log)
+        XCTAssertFalse(log.contains("EPIJ_Qual=308"), log)
+    }
+
     /// Poll until the panel task posts a notice whose text contains
     /// `fragment` (the Task-completion signal for `nil` results too).
     private func waitForNotice(

Tests/ICCeryUITests/Milestone11PrintSettingsUITests.swift

@@ -251,6 +251,87 @@ final class Milestone11PrintSettingsUITests: XCTestCase {
         XCTAssertTrue(log.contains("EPIJ_Qual=305"), log)
     }
 
+    /// #214 — a fixture PPD pointing at a fixture `PDEData.dat` (via
+    /// `ICCERY_CUPS_PPD_DIR`) constrains the quality picker to the
+    /// media's allowed set; switching media re-filters and clamps the
+    /// selection.
+    func testQualityPickerFiltersByMediaConstraints() throws {
+        let ppdDir = testRoot.appendingPathComponent("ppd")
+        let epsonRoot = testRoot.appendingPathComponent("epson-driver")
+        let datDir = epsonRoot.appendingPathComponent(
+            "Machine/M.data/Contents/Resources")
+        try FileManager.default.createDirectory(
+            at: ppdDir, withIntermediateDirectories: true)
+        try FileManager.default.createDirectory(
+            at: datDir, withIntermediateDirectories: true)
+        try """
+            *EPIJDriverBasePath: "\(epsonRoot.path)"
+            *EPIJMachineBundleName: "M.data"
+            """.write(
+                to: ppdDir.appendingPathComponent("Mock_Epson_7450.ppd"),
+                atomically: true, encoding: .utf8)
+        try """
+            *EPIJUIConstraint: *MediaType Stationery|*EPIJ_Qual 305
+            *EPIJUIConstraint: *MediaType Stationery|*EPIJ_Qual 307
+            *EPIJUIConstraint: *MediaType Stationery|*EPIJ_Qual 308
+            *EPIJUIConstraint: *MediaType PhotographicGlossy|*EPIJ_Qual 301
+            *EPIJUIConstraint: *MediaType PhotographicGlossy|*EPIJ_Qual 302
+            *EPIJUIConstraint: *MediaType PhotographicGlossy|*EPIJ_Qual 303
+            *EPIJUIConstraint: *MediaType PhotographicGlossy|*EPIJ_Qual 304
+            """.write(
+                to: datDir.appendingPathComponent("PDEData.dat"),
+                atomically: true, encoding: .utf8)
+        app.launchEnvironment["ICCERY_CUPS_PPD_DIR"] = ppdDir.path
+        launchAppWithDefaults()
+        reachPrintPanel()
+        _ = waitFor("printerStatusBadge")
+
+        let qualityPopup = app.popUpButtons["printerQualitySelect"]
+        XCTAssertTrue(qualityPopup.waitForExistence(timeout: 10))
+
+        // Default media Stationery → {301,302,303,304} only.
+        qualityPopup.click()
+        let stationeryExpected = ["301", "302", "303", "304"]
+        for token in stationeryExpected {
+            XCTAssertTrue(
+                app.menuItems[token].waitForExistence(timeout: 5),
+                "Missing quality menu item \(token)")
+        }
+        XCTAssertFalse(app.menuItems["307"].exists)
+        app.typeKey(XCUIKeyboardKey.escape, modifierFlags: [])
+
+        // Switch to PhotographicGlossy → {305,307,308} in driver
+        // order (308 first — lpoptions order), selection clamped.
+        let mediaPopup = element("printerMediaTypeSelect")
+            .descendants(matching: .popUpButton).firstMatch
+        XCTAssertTrue(mediaPopup.waitForExistence(timeout: 5))
+        mediaPopup.click()
+        let glossyItem = app.menuItems["PhotographicGlossy"]
+        XCTAssertTrue(glossyItem.waitForExistence(timeout: 5))
+        glossyItem.click()
+
+        qualityPopup.click()
+        let glossyExpected = ["308", "305", "307"]
+        for token in glossyExpected {
+            XCTAssertTrue(
+                app.menuItems[token].waitForExistence(timeout: 5),
+                "Missing quality menu item \(token)")
+        }
+        let titles = app.menuItems.allElementsBoundByIndex
+            .map(\.title)
+            .filter { glossyExpected.contains($0) }
+        XCTAssertEqual(titles, glossyExpected)
+        app.typeKey(XCUIKeyboardKey.escape, modifierFlags: [])
+
+        // The stale pick (303) clamped to the first allowed token.
+        let deadline = Date().addingTimeInterval(5)
+        while Date() < deadline,
+              selection(of: "printerQualitySelect") != "308" {
+            RunLoop.current.run(until: Date().addingTimeInterval(0.2))
+        }
+        XCTAssertEqual(selection(of: "printerQualitySelect"), "308")
+    }
+
     /// #201 D5 — per-page mode records one line per page; the
     /// `chkSingleSpoolJob` toggle collapses the job into a single
     /// request logged once with `pages=N`.

Tests/ICCeryUITests/Milestone3UITests.swift

@@ -114,18 +114,18 @@ final class Milestone3UITests: XCTestCase {
         return recordedSpoolLog()
     }
 
-    /// Drags `#galleryPage-0`'s TIFF upward so `identifier`'s button
-    /// moves up, clear of the Dock collision zone at the window's
-    /// bottom edge (#132).
+    /// Scrolls `stage-2` with the synthesized scroll wheel so
+    /// `identifier`'s button moves up, clear of the Dock collision
+    /// zone at the window's bottom edge (#132).
     ///
     /// macOS overlay scrollbars are not in the AX tree — never use
-    /// `app.scrollBars` — and a synthesized scroll wheel is inert on
-    /// this LazyVGrid, so the scroll is a real drag on the gallery
-    /// cell's content. A stale/off-screen AX frame resolves to a screen
-    /// point that can be a Dock icon — a coordinate click there once
-    /// opened Calendar instead of Print. Callers must click only when
-    /// the returned element `isHittable`; never coordinate-click a
-    /// stale frame.
+    /// `app.scrollBars` — and a click-drag does not scroll a macOS
+    /// ScrollView (content-drag scrolling is iOS-only); the scroll
+    /// wheel is the mechanism the platform supports (#215). A
+    /// stale/off-screen AX frame resolves to a screen point that can
+    /// be a Dock icon — a coordinate click there once opened Calendar
+    /// instead of Print. Callers must click only when the returned
+    /// element `isHittable`; never coordinate-click a stale frame.
     @discardableResult
     private func scrollStage2UntilHittable(
         _ identifier: String,
@@ -134,6 +134,8 @@ final class Milestone3UITests: XCTestCase {
         var button = app.buttons[identifier]
         let cell = app.descendants(matching: .any)["galleryPage-0"].firstMatch
         XCTAssertTrue(cell.waitForExistence(timeout: 10), "galleryPage-0")
+        let scrollView = app.scrollViews["stage-2"]
+        XCTAssertTrue(scrollView.waitForExistence(timeout: 10), "stage-2")
 
         let deadline = Date().addingTimeInterval(timeout)
         while Date() < deadline {
@@ -142,25 +144,12 @@ final class Milestone3UITests: XCTestCase {
                button.frame.maxY < windowBottom - 80 {
                 return button
             }
-            // Grab the upper half of the cell (the TIFF, not the Print
-            // button / Dock) and drag toward the top of the window.
-            // Mouse moves UP ⇒ gallery content moves UP ⇒ Print leaves
-            // the Dock zone.
-            if cell.isHittable {
-                let start = cell.coordinate(withNormalizedOffset:
-                    CGVector(dx: 0.5, dy: 0.25))
-                let end = start.withOffset(CGVector(dx: 0, dy: -280))
-                start.press(forDuration: 0.15, thenDragTo: end)
-            } else {
-                // Cell not hit-testable: drag the stage-2 content
-                // directly — still content, still never scrollBars.
-                let scrollView = app.scrollViews["stage-2"]
-                scrollView.coordinate(withNormalizedOffset:
-                    CGVector(dx: 0.5, dy: 0.55))
-                    .press(forDuration: 0.15, thenDragTo:
-                        scrollView.coordinate(withNormalizedOffset:
-                            CGVector(dx: 0.5, dy: 0.15)))
-            }
+            // Wheel-down inside the stage-2 viewport: content moves
+            // UP ⇒ Print leaves the Dock zone. Negative deltaY scrolls
+            // toward the document bottom (#215).
+            scrollView.coordinate(withNormalizedOffset:
+                CGVector(dx: 0.5, dy: 0.5))
+                .scroll(byDeltaX: 0, deltaY: -60)
             RunLoop.current.run(until: Date().addingTimeInterval(0.4))
             button = app.buttons[identifier]
         }

project.yml

@@ -61,7 +61,7 @@ targets:
         INFOPLIST_KEY_LSMinimumSystemVersion: "12.0"
         INFOPLIST_KEY_NSPrincipalClass: NSApplication
         INFOPLIST_KEY_NSHumanReadableCopyright: "Copyright © 2026 Gronod. AGPLv3."
-        MARKETING_VERSION: "2.0.2"
+        MARKETING_VERSION: "2.0.3"
         CURRENT_PROJECT_VERSION: "1"
         # Stamped by scripts/version.sh at packaging/CI time (release tag or
         # `git describe` string); About shows it next to the marketing version.

scripts/package-release.sh

@@ -150,7 +150,7 @@ if [ ! -f "$DMG_BACKGROUND" ]; then
 fi
 
 echo "==> Building DMG"
-VERSION="$(plutil -extract CFBundleShortVersionString raw "$APP/Contents/Info.plist" 2>/dev/null || printf '2.0.0')"
+VERSION="$(plutil -extract CFBundleShortVersionString raw "$APP/Contents/Info.plist" 2>/dev/null || printf '2.0.3')"
 BUILD_NUM="$(plutil -extract CFBundleVersion raw "$APP/Contents/Info.plist" 2>/dev/null || printf '1')"
 # Tagged/described builds carry the tag in the DMG name so prerelease
 # artefacts are self-describing (ICCery-2.0.0-pre2-grok-236.dmg); a plain