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fix(highway): stop stale viz frame bleeding through after switching visualizations (#565)

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Switching between the 3D drum highway (renders onto #highway) and the 3D
guitar highway (renders into its own .h3d-wrap overlay) left the previous
drum frame showing through the gap the overlay did not cover.

Core: _setRenderer now replaces #highway on a genuine viz change (keyed on
viz id via _rendererVizKey, not object identity, so benign same-viz
re-installs don't churn the canvas) as well as on a context-type change.

highway_3d: applySize pins the .h3d-wrap overlay to #highway's exact box,
derived from the same getBoundingClientRect measurements that size the
renderer (sub-pixel correct under zoom). Re-pins once the canvas lays out
(init race) and resets to the static anchor in the not-laid-out fallback.

Reviewed locally via codex (5 rounds, converged clean). CI checks are the
known org Actions billing block, not real failures.
This commit is contained in:
Byron Gamatos
2026-06-22 13:27:21 +02:00
committed by GitHub
parent 5145710a8a
commit 187d0bb978
4 changed files with 299 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
plugins/highway_3d/screen.js
+69 -1
View File
@@ -2703,6 +2703,14 @@
// that CSS-box drift and re-frame, instead of the user having to
// un/re-maximize the window.
let _appliedW = 0, _appliedH = 0;
// True once applySize() has pinned the .h3d-wrap overlay to the
// highway canvas's offset box. Stays false while the canvas has no
// layout yet (init() can run before #highway has a real box, where
// applySize falls back to the parent-panel size and only sets the
// wrap height). The rAF loop re-pins once the canvas lays out even
// when the logical render size is unchanged — otherwise the overlay
// would stay at top:0;left:0;right:0 and expose a strip of #highway.
let _wrapPinned = false;
let mBeatM = null, mBeatQ = null;
let txtCache = {};
// Cloned sprite materials cached on individual sprite instances
@@ -12941,7 +12949,55 @@
const baseDPR = _ssActive() ? Math.min(devicePixelRatio, 1.25) : Math.min(devicePixelRatio, 2);
ren.setPixelRatio(_renderScale * baseDPR);
ren.setSize(w, h);
wrap.style.height = h + 'px';
// Pin the overlay to #highway's exact box so it fully covers the
// canvas. The wrap is anchored to top:0/left:0/right:0 of its
// offset parent, which only lines up with #highway when the
// canvas sits at the parent's origin. The v3 player can place
// chrome above the canvas, shifting the wrap up so its lower edge
// falls short of #highway — leaving a strip of the canvas exposed
// (the reported gap, where the previous renderer's frame showed
// through). The wrap is a sibling of highwayCanvas, so they share
// an offset parent; tracking the canvas's box keeps the overlay
// flush in single-player and splitscreen alike.
//
// Derive the box from the SAME getBoundingClientRect measurements
// that drive ren.setSize(w, h) — NOT integer offsetTop/Width — so
// the overlay matches the renderer exactly. Under browser zoom or
// fractional flex layouts the canvas lands on sub-pixel bounds;
// offsetWidth/Top round to whole pixels and would leave the wrap up
// to 1px short of (or shifted from) the canvas, reopening the
// exposed edge strip. Position is taken relative to the containing
// block's padding edge (clientTop/Left strip the parent's border),
// which is what `top`/`left` resolve against for the absolutely
// positioned wrap. Guarded on a laid-out canvas (offsetWidth/Height
// > 0); otherwise fall back to the static top:0/left:0/right:0.
if (highwayCanvas && highwayCanvas.offsetWidth > 0 && highwayCanvas.offsetHeight > 0) {
const _pinParent = wrap.offsetParent || highwayCanvas.parentNode;
const _cr = highwayCanvas.getBoundingClientRect();
const _pr = _pinParent ? _pinParent.getBoundingClientRect() : { top: 0, left: 0 };
const _pbTop = _pinParent ? _pinParent.clientTop : 0;
const _pbLeft = _pinParent ? _pinParent.clientLeft : 0;
wrap.style.top = (_cr.top - _pr.top - _pbTop) + 'px';
wrap.style.left = (_cr.left - _pr.left - _pbLeft) + 'px';
wrap.style.right = 'auto';
wrap.style.width = _cr.width + 'px';
wrap.style.height = _cr.height + 'px';
_wrapPinned = true;
} else {
// Canvas not laid out (e.g. init ran before #highway had a real
// box, or a panel hide/show where canvasSize() falls back to the
// parent panel). Reset to the static anchor — if we had pinned
// before, the old top/left/right:auto/width would otherwise stay
// and the wrap would reappear at a stale horizontal position on
// the next show. Leave _wrapPinned false so the rAF loop re-pins
// once the canvas materializes again.
wrap.style.top = '0';
wrap.style.left = '0';
wrap.style.right = '0';
wrap.style.width = 'auto';
wrap.style.height = h + 'px';
_wrapPinned = false;
}
if (lyricsCanvas) { lyricsCanvas.width = w; lyricsCanvas.height = h; }
_diagRenderCache.clear();
cam.aspect = w / h;
@@ -13320,6 +13376,17 @@
} else if (box.w > 0 && box.h > 0 &&
(Math.abs(box.w - _appliedW) > 1 || Math.abs(box.h - _appliedH) > 1)) {
applySize(box.w, box.h);
} else if (!_wrapPinned && box.w > 0 && box.h > 0 &&
highwayCanvas.offsetWidth > 0 && highwayCanvas.offsetHeight > 0) {
// 3. The overlay pin couldn't be applied at init because
// #highway had no layout yet (offsetWidth/Height === 0),
// so applySize() only set the wrap height. The canvas has
// now laid out but to the same logical size, so neither
// drift branch above fires — re-run applySize to pin the
// wrap to the canvas box now that its offsets are real.
// Otherwise the overlay stays at top:0;left:0;right:0 and
// a strip of #highway is exposed on first load / split.
applySize(box.w, box.h);
}
}
update(bundle);
@@ -13497,6 +13564,7 @@
_destroyed = true; _isReady = false; _diagChord = null; _diagPrev = null; _diagLastKey = null; _diagRenderCache.clear();
_lastHwW = 0; _lastHwH = 0;
_appliedW = 0; _appliedH = 0;
_wrapPinned = false;
_unsubscribeFocus(); teardown();
highwayCanvas = null;
},