Kyle reported the blur "being masked by just going opeque" on maximize, and
separately the desktop punching through a maximized window. Both were the same
transition, and the old guard covered neither honestly.
THE GUARD'S SIGNAL IS NOW THE MODAL LOOP ITSELF. thumbbar.rs already
subclasses the main window for the taskbar transport, so the size loop is three
arms on that existing proc: WM_NCLBUTTONDOWN carrying a sizing hit-test (or
SC_SIZE, the keyboard path) latches "this loop is a RESIZE", WM_ENTERSIZEMOVE
arms, WM_EXITSIZEMOVE releases, and WM_SIZING arms as a second net because this
window is undecorated and tao does its own NCHITTEST. Emitted as
soulseek:resize-drag, POSTED to ourselves rather than emitted inline: emitting
from inside DefWindowProc's modal loop reenters the wry runtime's window store
while that loop holds it.
The signal and the failure are then the same object, which is what the two
previous attempts were not. The first grounded on any DOM `resize` — one event
fires for a maximize, so the settled window sat flat black for ~70ms hiding
glass that was already back. The second discriminated on event CADENCE, and
that is the one worth remembering: on this 4-core laptop, re-rasterising every
backdrop-filter at each new size pushes `resize` deliveries far apart, and
measured 2026-08-28 events 150ms apart never grounded AT ALL — a real drag
stayed see-through, shipping the exact artifact the guard exists to prevent.
Cadence is not a proxy for the loop.
DWM SUSPENDS THE ACRYLIC INSIDE THE LOOP but keeps compositing the plain
BLURBEHIND, so the accent swaps down to Blur for the gesture and back on
release (window_glass refactored into apply_accent + an Accent enum; GLASS_ON
tracks the main window so the subclass can re-assert). The window stays glassy
through a drag instead of going black — which is what Kyle actually wanted, and
GROUND_DRAG is off on his verification by hand.
THE MAXIMIZE ANIMATION SCALES A SNAPSHOT the accent cannot ride: measured at
43ms/frame, desktop icons read sharply THROUGH the maximized window until
~613ms after the call. Disabling the DWM zoom animation removed the
punch-through outright and every frame of a ground-suppressed maximize showed
the blur soft and present — but that also removed the animation, and Kyle chose
the animation back with the canvas grounded across the recomposition. So
transitions are forced ON, the subclass brackets the jump (active at WM_SIZE, a
re-assert immediately and again at 650ms, release with the second), and
GROUND_DISCRETE paints the canvas for exactly that bracket. Both policies are
one-line JS constants in glass.js — flipping between "animation + dark bracket"
and "instant snap + live glass" needs no rebuild.
The DOM resize listener survives as the fallback for a build with no subclass,
reverting to the original behaviour; it stands down for good the moment one
native event is heard. Measured clean: 3 maximize/restore gestures, 3 brackets,
canvas never opaque outside them; a 9-second modal loop held with zero resize
events in it.
98/98 tests.
KeelrLeek
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