enricobuehlerandClaude Opus 5
36e566052f
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`resetCursorRects` wore the host shape only when `hostCursors[st.serial]` hit,
and fell through to `invisibleCursor` on a miss. But a miss is the ROUTINE case,
not a degenerate one, and it is not a reason to hide the pointer:
* State (0xD0) is a per-frame datagram and announces the new serial the moment
the host QUEUES the bitmap on the reliable control stream, so on every single
shape change the client knows a serial before it holds the pixels.
* The shape ring drops the NEWEST under burst (CURSOR_SHAPE_QUEUE = 8) and the
host never re-sends it — it only sends on a serial CHANGE — so a dropped
serial stays un-backed until the pointer next changes shape. Crossing a
toolbar flips arrow/I-beam/hand/resize several times a second, and each flip
mints a fresh serial and a fresh bitmap, so bursts are ordinary.
Either way the pointer BLINKED OUT rather than lagging, and in the dropped case
it stayed gone for as long as the pointer held that shape — reported on glass as
"the I-beam never appears over text fields, every other cursor is fine".
Hold the last worn shape across the gap: only `st.visible == false` (the host
says the pointer is hidden) may hide it now, never a missing bitmap. Worst case
is a briefly stale pointer. This also makes two comments that already claimed
this behaviour true — the shape-rejected warning's "keeping the previous cursor"
and CURSOR_SHAPE_QUEUE's healing claim, both of which were fiction.
Host side is exonerated: on .221 the poller sees the I-beam handle (0x10005,
CURSOR_SHOWING set), and the monochrome AND-over-XOR conversion renders a correct
glyph — black beam, white outline — so the bitmap that goes on the wire is good.
swift build PunktfunkKit + cargo check punktfunk-core green; on-glass owed.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>