The now-playing stamp bubble came out wider than its lines with the text
offset, and never reproduced in isolation. The three stamp ToolTips now
bind width/height straight to the content's implicit size with zero
paddings, insets and margins, leaving nothing for the style to add.
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A property named `on<Upper>` is filed as a signal handler as soon as a
sibling member `<upper>` exists: its initializer never binds, it sits at
the type default, and nothing warns. `PurchasesView.qml` declared
`onAlbums` next to `albums`, so the Albums tab bound `[]` once and never
re-evaluated, which blanked Purchases for every account with real
purchases. Reproduced standalone with the `qml` runtime: the identical
expression under another name reads `true`.
Rename it to `albumsTab` and the four other `on<Upper>` properties
(`collectionsTab`, `surfaceTint`, `accentFloor`, `litColor`) so the rule
can be exact, and add `qml_on_prefixed_property_audit.py` to the four
QML audit sites (qt-run, cargo-test, test-crates, qt-gate-windows).
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The track's "ShaderEffect / ColorOverlay / MultiEffect render NOTHING on the
software path this port runs on" doctrine was measured FALSE on 2026-07-29:
qbz-qt runs on the GPU (OpenGL RHI, threaded render loop, vsync 5.56ms). The
claim came from an offscreen session, and QT_QPA_PLATFORM=offscreen forces
software by definition. Every design it justified needed re-deciding.
- RoundedImage was a Canvas (renderTarget: Canvas.Image) that rasterised with
QPainter on the CPU AND uploaded a texture per repaint, for every cover in
the app, purely to round a corner identical in every frame of that image's
life. It is now layer.enabled + MultiEffect { maskSource } — an FBO rendered
once and cached for static content. Rectangle { radius; clip: true } cannot
do this: clip in Qt Quick is a RECTANGULAR scissor and ignores radius.
maskThresholdMin/maskSpreadAtMin are 0.5/1.0, NOT the 0.0/0.0 that looks
natural: 0.0 collapses Qt's mask smoothstep to step(0, alpha) and every
pixel with any alpha snaps fully opaque — measured 0 antialiased pixels at
radius 40 against the Canvas's 292. At 0.5/1.0 it is 308, ramp [0,51,219,255].
A software machine keeps the Canvas arm (GraphicsInfo.api), and
QBZ_QT_ROUND_MODE=canvas pins it on a GPU machine where the mask misbehaves.
- VizSettle drove the spectrum from FrameAnimation, i.e. every rendered frame:
180fps on this box for data the producer publishes at TARGET_FPS = 30. Now a
16ms Timer; the wall-clock maths is unchanged.
- SpectrumBand's per-bar y was a SECOND JS binding derived from height. An
anchor does the same arithmetic in C++ with no binding at all, and each FFT
frame is materialised into a plain array once per publish instead of being
read element by element across the JS/C++ boundary. Bindings per tick: bars
28 (was 56), waveform 48 (was 96), energy 5 (was 10).
QQuickPaintedItem was investigated and rejected with evidence: cxx-qt 0.7.3
emits X(QObject* parent) : base(parent), which does not compile against
QQuickPaintedItem(QQuickItem*), paint() is pure virtual, and there is zero
precedent for a custom base class in this workspace. Qt 6 ShaderEffect takes
no GLSL, only precompiled .qsb, which would make the build depend on a Qt
tool whose path differs on macOS.
- PlaylistCollage point-sampled its mosaic in its own Canvas
(Context2D.drawImage does not filter when it scales — measured RMSE 0.000
against nearest-neighbour). It now draws through RoundedImage.
- The scaled-derivative cache had no eviction at all and the .jpg -> .png key
change had orphaned 1251 files. Boot housekeeping sweeps the orphans once and
bounds the directory at 64 MB, LRU by mtime. Verified by effect: first run
deleted 1259 files / 10.05 MB, every run since reports 0, and the directory
is 14 MB. The eviction is only survivable because RoundedImage clears
_scaled on Image.Error and re-requests.
- For You artwork patched the rails in place instead of republishing the
document, which was resetting contentY. HomeView is destroyed on every
navigation, so the patch map is re-handed on mount through
QbzHome.refreshForyouArt() — otherwise the Radio rail and the Spotlight hero
went blank for the rest of the session after one navigation, and the skeleton
pulse Timer stayed pinned ON, defeating the fix it belonged to.
- Spotlight's placeholder gated on the local path instead of the remote url, so
it flashed a glyph on a cold cache where the Slint does not.
The retired doctrine is corrected wherever it was load-bearing for a decision.
The pre-baked icon tints are deliberately NOT reopened and no drop-shadows are
added: both are visual changes, not perf fixes.
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The LEDs only changed when the user navigated. They were published from the
settings snapshot, so they refreshed when that document republished rather
than when playback started — which is exactly when the backend and mode are
decided, a moment after "now playing" in the log. They publish on the stream
edge now, without polling and without republishing settings.
The stamp itself was close but not 1:1, so it went back against
shell/AudioStamp.slint, primitives/QualityBadgeFull.slint and shell/SongCard.slint
line by line; the divergences in sizes, weights, spacing and the inactive LED
colour are corrected.
Volume is locked while the bit-perfect ALSA direct path is engaged. Software
volume there is meaningless and applying it would not be bit-perfect, so the
control now reads as inert rather than silently doing nothing. Slint has the
same gap and no lock to copy, so this is new: the condition comes from the
output state already published, and no audio behaviour changed — only the UI
reflects it.
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The port had one hand-made badge taken from the archived Tauri tree. Slint has
three distinct components and each bar mounts a specific one, so the wrong tree
had cost the stamp its LEDs entirely — they exist only in Slint, derived from
the output backend and mode, and no amount of polishing the Svelte port would
have produced them.
QualityBadge becomes Slint's icon-only mark with its hover tooltip, for cards
and rows. QualityBadgeFull is the icon plus stacked tier and detail. AudioStamp
is the inline two-row form that carries the LEDs: backend blue when engaged,
mode green, purple for a cast session, amber with the renderer name for a peer
Qobuz Connect. New and Classic mount the SongCard stamp column, Large and Small
the inline stamp, matching the .slint mount sites.
The downgrade case follows Slint too: row one reports what is actually being
delivered with an amber arrow, and the catalog maximum moves into the tooltip
next to the reason it was limited.
PlayerBar's LEDs stop reading the settings document, which never knew whether a
backend was engaged, and read the now-playing output state instead — where
Slint reads them.
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vicrodh