liquid_glass_widgets 0.8.1

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New Features #

GlassInteractionBehavior — precise, orthogonal control of press interactions #

A new first-class enum that independently controls the two dimensions of press feedback on GlassBottomBar, GlassSearchableBottomBar, and GlassTextField (as well as its derivative inputs):

Value	Glow	Scale
none	✗	✗
glowOnly	✓	✗
scaleOnly	✗	✓
full (default)	✓	✓

The glow is the iOS 26-style directional light spotlight that follows the touch position across the glass surface. The scale is the spring-physics size pulse on press.

// Glow only — light follows your finger, no bounce:
GlassBottomBar(
  interactionBehavior: GlassInteractionBehavior.glowOnly,
  ...
)

// Scale only — spring bounce, no glow:
GlassSearchableBottomBar(
  interactionBehavior: GlassInteractionBehavior.scaleOnly,
  pressScale: 1.06,
  ...
)

// Disable both for a completely static bar:
GlassBottomBar(
  interactionBehavior: GlassInteractionBehavior.none,
  ...
)

Zero overhead when disabled. When interactionBehavior suppresses glow (none or scaleOnly), the GlassGlow sensor widget is removed from the tree entirely — saving 3 widget allocations and 3 RenderBox nodes per tab indicator per frame. Scale is resolved at build time to a scalar 1.0 with no animation controller overhang.

New parameters on GlassBottomBar, GlassSearchableBottomBar, and GlassTextField #

GlassTextField now shares the same interactionBehavior API as the bar-family widgets. The scale dimension maps onto the subtle press-bounce animation (field squishes slightly when pressed down); the glow dimension is the directional spotlight that tracks touch position across the glass surface.

GlassPasswordField and GlassTextArea delegate to GlassTextField and inherit the new parameter automatically.

Parameter	Widget(s)	Type	Default
interactionBehavior	All three	GlassInteractionBehavior	.full
pressScale	Bar widgets / Inputs	double	1.04 (bars) / 1.03 (inputs)
interactionGlowColor	Bar widgets	Color?	null (theme default)
glowColor	GlassTextField	Color?	null (~12% white)
interactionGlowRadius	Bar widgets	double	1.5
glowRadius	GlassTextField	double	1.5

All defaults preserve existing 0.8.0 visual behaviour — no migration required.

Migration from enableGlow / enableFocusAnimation

GlassTextField.enableGlow and GlassTextField.enableFocusAnimation have been replaced by interactionBehavior. The mapping is direct:

// Before (0.8.0):
GlassTextField(enableGlow: false, enableFocusAnimation: false)

// After (0.8.1):
GlassTextField(interactionBehavior: GlassInteractionBehavior.none)

// Before: glow only
GlassTextField(enableGlow: true, enableFocusAnimation: false)
// After:
GlassTextField(interactionBehavior: GlassInteractionBehavior.glowOnly)

Bug Fixes #

• FIX: SearchPill was silently ignoring interactionBehavior. The interactionGlowColor parameter was never passed to the SearchPill constructor, so the search pill always rendered with a visible glow regardless of the bar's interactionBehavior setting. The glow was hardcoded to Color(0x1FFFFFFF) even when behavior = none.

• FIX: SearchPillState had no glow short-circuit on the expanded pill path. Added _wrapWithGlow helper (matching the pattern already in TabIndicatorState and SearchableTabIndicatorState) to skip GlassGlow allocation when glow is suppressed.

---

New Features #

GlassAdaptiveScope (experimental) — automatic runtime quality adaptation #

A new scope widget that automatically adjusts GlassQuality for its subtree based on real raster performance observed from SchedulerBinding frame timings. Handles the three device scenarios that are impossible to test on a developer device:

• Broken / slow shader drivers (e.g. Pixel 4a, Galaxy A22 class): detected synchronously at startup via ImageFilter.isShaderFilterSupported and capped immediately to minimal.
• Warm-up jank ("wrong quality at startup"): resolved by a ~180-frame benchmark that measures real P75 raster durations and sets the initial quality tier before the user notices.
• Thermal throttling ("fine at launch, janky after 10 minutes"): detected and corrected by a continuous runtime hysteresis engine.

Three-phase adaptation:

Phase	Trigger	Action
Phase 1 — Static probe	Mount	Forces minimal on unsupported hardware; caps at standard on web
Phase 2 — Warm-up	First ~180 frames (~3 s at 60 fps)	Sets initial quality from real P75 raster durations
Phase 3 — Runtime hysteresis	Ongoing	Degrades after 3 bad windows; recovers after 10 good windows (8 s cooldown)

The scope acts as a quality ceiling — widgets with an explicit quality: parameter are unaffected. The ceiling is enforced by GlassThemeHelpers.resolveQuality, which reads GlassAdaptiveScopeData from the nearest ancestor scope.

// Per-screen control:
GlassAdaptiveScope(
  child: Scaffold(...),
)

// Advanced — conservative start for fragmented Android market:
GlassAdaptiveScope(
  initialQuality: GlassQuality.standard, // earn your way up to premium
  allowStepUp: true,
  onQualityChanged: (from, to) => analytics.log('glass_quality_changed'),
  child: child,
)

Experimental in 0.8.0. GlassAdaptiveScope and GlassAdaptiveScopeConfig are annotated @experimental. The three-phase adaptation logic is architecturally sound and fully tested, but the Phase 2 timing thresholds (P75 < 12 ms → premium, 12–20 ms → standard, > 20 ms → minimal) have been validated by reasoning, not yet by broad real-device data across the Android fragmentation landscape.

How to enable it: LiquidGlassWidgets.wrap(myApp, adaptiveQuality: true) (opt-in, default false).

If you observe unexpected behaviour — quality too low on a mid-range device, or stuck at standard on a flagship — please file an issue with your device model and raster timings from Flutter DevTools. Your data will be used to tune the thresholds for a future release.

GlassAdaptiveScopeConfig (experimental) — portable configuration value object #

Bundles all GlassAdaptiveScope parameters into a single const-constructible, equality-comparable value object. Used by LiquidGlassWidgets.wrap() and useful for passing scope configuration through APIs that cannot accept widget parameters directly.

const config = GlassAdaptiveScopeConfig(
  initialQuality: GlassQuality.standard,
  allowStepUp: true,
  targetFrameMs: 8, // 120 Hz ProMotion
);

API Refactor — initialize() and wrap() separation #

The responsibilities of initialize() and wrap() have been clarified and made consistent with the broader Flutter ecosystem (cf. easy_localization, MaterialApp):

Method	Responsibility
initialize()	Async platform / engine setup only (shader prewarming, Impeller pipeline, debug monitor)
wrap()	Widget-tree composition and all behavioral configuration

wrap() — new parameters #

runApp(LiquidGlassWidgets.wrap(
  const MyApp(),
  respectSystemAccessibility: false, // moved from initialize()
  adaptiveQuality: true,             // new — inserts GlassAdaptiveScope
  adaptiveConfig: GlassAdaptiveScopeConfig(
    initialQuality: GlassQuality.standard,
    allowStepUp: true,
  ),
));

Scope nesting order inserted by wrap() #

GlassAdaptiveScope → GlassBackdropScope → child

Breaking Changes #

initialize(respectSystemAccessibility:) removed #

respectSystemAccessibility has moved from initialize() to wrap().

Migration (one-line change):

// Before (0.7.x):
await LiquidGlassWidgets.initialize(respectSystemAccessibility: false);
runApp(LiquidGlassWidgets.wrap(const MyApp()));

// After (0.8.0):
await LiquidGlassWidgets.initialize();
runApp(LiquidGlassWidgets.wrap(const MyApp(), respectSystemAccessibility: false));

The LiquidGlassWidgets.respectSystemAccessibility getter and setter remain available as an escape hatch for tests and advanced runtime overrides. In production code, set it through wrap().

Bug Fixes #

Glass invisible on white / light backgrounds (transparency regression) #

• FIX: Standalone glass widgets (GlassButton, GlassContainer, GlassTextField, GlassCard, and all widgets that delegate to them) rendered with zero opacity on light backgrounds when no explicit settings: were provided. Root cause: these widgets fell through to InheritedLiquidGlass.ofOrDefault(), which returns LiquidGlassSettings() — a default with glassColor: Color(0x00FFFFFF) (alpha = 0). The lightweight shader computes body tint = glassColor.alpha × 0.15, so 0 × 0.15 = 0 — the glass body was literally transparent regardless of thickness or blur.

  Fix: Replaced all InheritedLiquidGlass.ofOrDefault() call sites with the new GlassThemeHelpers.resolveSettings(), which traverses the full 5-level priority chain:

  1. Widget-level settings: parameter (explicit wins)
  2. InheritedLiquidGlass — nearest parent AdaptiveLiquidGlassLayer
  3. LiquidGlassWidgets.globalSettings — app-level override
  4. GlassThemeData — brightness-aware theme variant (light / dark)
  5. LiquidGlassSettings() — absolute last resort

  Standalone widgets now correctly resolve to the theme's glassColor and are always visible out of the box.

Light theme defaults rebalanced #

• TWEAK: GlassThemeVariant.light updated for an icy-frosted aesthetic that reads clearly on white backgrounds:

  Property	Before	After
  blur	10.0	6.0
  glassColor	0x73FFFFFF (45% neutral white)	0x4AD2DCF0 (~29% cool blue-white)
  chromaticAberration	0.1	0.3
  thickness	16.0	20.0
  lightIntensity	1.0	1.2

  The cool blue-white tint (D2DCF0) matches the icy tone of iOS 26 frosted glass. Blur 6 gives visible background diffusion without obscuring content.

API #

GlassBackdropScope now exported from the main barrel #

• FIX: GlassBackdropScope was missing from liquid_glass_widgets.dart. Consumers had to use the internal path package:liquid_glass_widgets/widgets/shared/glass_backdrop_scope.dart, which is fragile and undocumented. It is now a first-class public export.

  Migration — update any direct internal imports:

  // Before (workaround, fragile):
  import 'package:liquid_glass_widgets/widgets/shared/glass_backdrop_scope.dart';
  
  // After (correct):
  import 'package:liquid_glass_widgets/liquid_glass_widgets.dart';
  

• CHORE: add CI and Codecov badges.

Bug Fixes #

• FIX: GlassSearchableBottomBar — memory leak when controller was swapped at runtime. The old controller's listener was never removed before attaching to the new controller. Now correctly removed in didUpdateWidget.
• FIX: DraggableIndicatorPhysics — velocity NaN/Infinity guard. A zero-size render box (e.g. during widget tree warm-up) could produce Infinity or NaN for velocityX, which propagated into the spring physics and caused erratic snapping. Now clamped to 0 when the box has no size.

Refactor (zero breaking changes) #

• REFACTOR: Extracted GlassSearchBarConfig from glass_searchable_bottom_bar.dart into a dedicated file lib/widgets/surfaces/shared/glass_search_bar_config.dart. Resolves a circular import between the public widget and its internal sub-widgets. GlassSearchBarConfig is re-exported from the barrel file — no consumer-facing API change.
• REFACTOR: Extracted _TabIndicator / _TabIndicatorState from glass_bottom_bar.dart into shared/bottom_bar_internal.dart as TabIndicator / TabIndicatorState (package-internal, not exported). Follows the same pattern used for GlassSearchableBottomBar. glass_bottom_bar.dart reduced from 1,406 → ~895 lines.
• REFACTOR: Extracted _TabBarContent, _TabBarContentState, and _TabItem from glass_tab_bar.dart into shared/tab_bar_internal.dart. glass_tab_bar.dart reduced from 728 → ~310 lines. Architecture is now consistent across all bar-family widgets.

Test Coverage #

• TEST: Reached 91.85% effective coverage (up from 89.6% in 0.7.15 — excluding GPU/shader renderer paths that are physically untestable in a headless VM). Total: 1,031 tests, all passing, 0 analyzer warnings.
• TEST: New test/widgets/surfaces/glass_bottom_bar_drag_test.dart — 7 regression tests covering _onDragEnd physics snapping, _onDragCancel (mid-drag and no-drag), slow drags, fast flings, and full-bar sweeps. These paths are the highest-risk regressions in navigation UX.

Bug Fixes #

• FIX: lib/theme/glass_theme_settings.dart was accidentally omitted from version control in 0.7.14. All consumers of GlassThemeSettings received a compile error (type 'GlassThemeSettings' is not a subtype). This release commits the missing file. No API change — GlassThemeSettings was already exported from liquid_glass_widgets.dart.
• FIX: GlassPerformanceMonitor._emitWarning — division-by-zero crash when rasterBudget was sub-millisecond (< 1 ms). Protected with a max(1, ...) guard.

Refactor (zero breaking changes) #

• REFACTOR: Consolidated 18 quality-resolution chains (widgetQuality ?? inherited?.quality ?? themeData.qualityFor(context) ?? GlassQuality.standard) into a single canonical helper: GlassThemeHelpers.resolveQuality(context, widgetQuality: ..., fallback: ...). Surface widgets (GlassAppBar, GlassToolbar, GlassBottomBar, GlassSearchableBottomBar, GlassSideBar) pass fallback: GlassQuality.premium to preserve their documented defaults. All other widgets default to GlassQuality.standard.
• REFACTOR: Extracted _buildIconShadows from BottomBarTabItem to a @visibleForTesting top-level function buildIconShadows(...) in bottom_bar_internal.dart. No behaviour change — enables isolated unit testing of the shadow-outline geometry.

Test Coverage #

• TEST: Reached 90%+ effective test coverage (90.15% — excluding src/renderer GPU/shader layer where headless simulation is impossible). Total: 949 tests, all passing.
• TEST: New test/theme/glass_theme_helpers_test.dart — 5 widget tests covering all 4 priority levels of GlassThemeHelpers.resolveQuality().
• TEST: New test/widgets/surfaces/build_icon_shadows_test.dart — 6 unit tests covering buildIconShadows(): null thickness, active-icon suppression, shadow count, 45° offset math, and color propagation.
• TEST: Added test/theme/, test/renderer/, test/types/, test/constants/, test/utils/, and test/widgets/ test suites (committed for the first time — these were written during the 0.7.13–0.7.14 coverage push but never staged).

Bug Fixes #

• FIX: GlassSearchableBottomBar — extraButton now fades out smoothly when search activates instead of being visually clipped/shrunk between the collapsing tab pill and the expanding search pill. Layout space is still reserved during the morph (no pills jump), only the visual opacity transitions. Taps on the extra button are also correctly blocked while hidden. Fades in when search closes.
• FIX: GlassSearchableBottomBar — spring morph animations no longer produce a visible jump when reversing direction. Previously the three spring controllers (tabW, searchLeft, searchW) were each started in separate addPostFrameCallback calls, introducing a 1-frame desync at reversal. All three are now started in a single batched callback, so the morph is perfectly synchronized in both directions.
• FIX: Indicator fade animation in GlassBottomBar / GlassSearchableBottomBar — replaced Opacity wrapper with LiquidGlassSettings.visibility fading. Wrapping a BackdropFilter in Opacity composites into an offscreen buffer, breaking backdrop sampling and causing the indicator to snap in/out instead of fading. The visibility path is a single GPU pass — no offscreen buffer — improving drag animation performance and working uniformly for all blur values.
• FIX: GlassBottomBar, GlassSearchableBottomBar, GlassAppBar, GlassToolbar, and GlassSideBar resolved to GlassQuality.standard instead of their documented GlassQuality.premium default. Fixed by setting quality: null in the built-in light/dark variants so each widget's documented default is respected.
• FIX: Setting any property in GlassThemeVariant.settings silently zeroed out all unset properties (e.g. setting only thickness: 50 also reset glassColor to fully transparent). Fixed by introducing GlassThemeSettings: a parallel class with all-nullable fields that merges onto each widget's own defaults. Only the fields you explicitly set are applied; everything else inherits from the widget. GlassThemeVariant.settings now accepts GlassThemeSettings?.
• FIX: GlassSearchableBottomBar — multiple layout-math regressions in the morph animation corrected:
  • Reserved layout width now correctly scales to min(size, searchBarHeight) during search, eliminating the bloated gap when searchBarHeight < barHeight.
  • Extra button rendered width now matches the layout reserve (extraTargetW), preventing a 14 px overflow into the search pill when searchBarHeight < barHeight.
  • Restored + widget.spacing in targetSearchLeft; an erroneous tabToNextGap variable had suppressed the gap between the tab pill and search pill when no extra button was present.
  • collapseOnSearchFocus now exclusively controls visibility/opacity — it no longer affects layout geometry. Toggling it mid-animation no longer triggers the spring or causes the button to jump inside the collapsed tab circle.
• FIX: BottomBarTabItem — removed a fixed vertical: 4 padding wrapping the tab column. The padding consumed constraint space before FittedBox could scale, causing a 2 px RenderFlex overflow when the bar morphed to searchBarHeight.

New #

• NEW: GlassThemeSettings — a partial settings type for use in GlassThemeVariant. Accepts the same parameters as LiquidGlassSettings but all are nullable. Only non-null fields override the target widget's defaults, enabling precise single-property theme overrides without disturbing others.
• NEW: GlassTabPillAnchor enum + GlassSearchableBottomBar.tabPillAnchor — controls how the tab pill is anchored during the morph animation. GlassTabPillAnchor.start (default) preserves existing left-anchor behaviour. GlassTabPillAnchor.center makes both edges collapse symmetrically from the pill's centre for a more balanced look. The search pill position adjusts automatically in center mode.
• NEW: GlassSearchBarConfig.showsCancelButton now defaults to true. Tapping the dismiss pill unfocuses the keyboard and collapses search, matching the system-level behaviour seen across iOS apps (Weather, App Store, Apple News). Pass showsCancelButton: false to opt out.
• NEW: GlassSearchBarConfig.collapsedTabWidth is now nullable. When omitted, the collapsed tab pill automatically matches GlassSearchableBottomBar.searchBarHeight, ensuring it morphs into a geometric circle with no leftover horizontal margin. Pass an explicit value to override.
• NEW: GlassBottomBarExtraButton.collapseOnSearchFocus (default true) — controls whether the extra button collapses when the search field is focused. When true, the button fades out and its layout space spring-animates to zero, giving the search input the full available width (matching native iOS behaviour). When false, the button remains fully visible and tappable alongside the search input — useful for contextually relevant actions like a Filter button that applies to search results.
• EXAMPLE: searchable_bar_repro.dart added to the example app — exercises GlassSearchableBottomBar edge cases (extra-button fade, spring desync, bar-height scale, dismiss pill) in isolation. Run standalone: flutter run -t example/lib/searchable_bar_repro.dart.

New — GlassQuality.minimal #

• FEAT: GlassQuality.minimal — third quality tier: a crisp frosted glass surface with zero custom fragment shader execution on any platform. Uses BackdropFilter blur

  • Rec. 709 saturation matrix + a light-angle specular rim stroke. No refraction warping or chromatic aberration — a deliberately flat, clean aesthetic that looks excellent on any background and never adds GPU shader cost.

  Two distinct use cases:

  Device fallback — for hardware where even [standard] is too heavy: very old Android devices with limited shader driver support, or any device where ImageFilter.isShaderFilterSupported returns false.

  GPU budget management — for shader-dense screens: use [minimal] for background panels, list cards, and decorative containers while keeping [standard] or [premium] on the focal element. A screen with 15 glass list cards running [minimal] fires zero shader invocations during scroll — only BackdropFilter compositing.

  AdaptiveGlass(
    quality: GlassQuality.minimal,
    child: child,
  )
  

• FEAT: GlassThemeVariant.minimal — static preset that applies .minimal quality globally via GlassThemeData:

  GlassTheme(
    data: GlassThemeData(
      light: GlassThemeVariant.minimal,
      dark:  GlassThemeVariant.minimal,
    ),
    child: child,
  )
  

New — GlassPerformanceMonitor #

• FEAT: Debug/profile-only performance monitor that watches raster frame durations while GlassQuality.premium surfaces are active. When frames exceed the GPU budget for 60 consecutive frames, a single FlutterError is emitted with actionable guidance (specific widget parameters, device compatibility notes, and alternative quality tiers).

  Zero production overhead — the monitor never registers a callback in release builds. Enabled by default in debug/profile builds via LiquidGlassWidgets.initialize():

  // Default: auto-enabled in debug/profile, zero-cost in release
  await LiquidGlassWidgets.initialize();
  
  // Opt out:
  await LiquidGlassWidgets.initialize(enablePerformanceMonitor: false);
  
  // Custom thresholds (advanced):
  GlassPerformanceMonitor.rasterBudget = const Duration(microseconds: 8333); // 120 fps
  GlassPerformanceMonitor.sustainedFrameThreshold = 120; // 2 seconds at 60 fps
  

  The monitor correctly attributes slowdowns to premium glass by counting active GlassQuality.premium surfaces. It stays silent when no premium widgets are mounted, avoiding false positives from other parts of the app.

---

Bug Fixes #

• FIX: Interactive blend-group stretch asymmetry — LiquidStretch now expands geometry symmetrically from the widget centre, fixing the left-leans-in / right-resists imbalance during touch-drag on button groups.

• FIX: Erroneous highlight bias — removed a legacy shader hack that skewed surface normals horizontally. Normals are now derived accurately from the SDF gradient, eliminating optical hotspots that made straight groups look crooked.

• PERF: Zero-jitter animation bounds — geometry texture mapping is now strictly bound to the physical size it was rasterised for, stopping frame-lag wobble when buttons change scale during interactive drags.

• FIX: Theme quality cascade — audited 15+ widgets (GlassBottomBar, GlassSwitch, GlassTextField, and others) that were silently overriding the global GlassThemeVariant quality setting with GlassQuality.premium. All widgets now correctly inherit and respect the global quality profile, protecting frame rate and thermal limits on older devices (e.g. iPhone 12 and below).

• FIX: Zero-thickness blur — setting thickness: 0 no longer makes the glass fully transparent. Backdrop blur now renders correctly on glass surfaces regardless of geometric thickness, restoring backward-compatible behaviour.

• FEAT: GlassSearchBarConfig.focusNode — optional FocusNode for GlassSearchBarConfig. When provided, the caller has full programmatic focus control (requestFocus(), unfocus(), addListener()) independent of autoFocusOnExpand. The widget adopts the caller-provided node without disposing it (caller owns lifecycle), matching Flutter's own TextField.focusNode contract.

• FEAT: GlassSearchBar.focusNode — same FocusNode support added to the standalone GlassSearchBar for consistency. GlassTextField already had this.

• FIX: ExtraButtonPosition — new enum on GlassBottomBarExtraButton. Set .position = ExtraButtonPosition.afterSearch to pin the extra button to the right of the search pill. Spring geometry calculations reserve space correctly to prevent RenderFlex overflows during expand/collapse. Default is ExtraButtonPosition.beforeSearch — fully backwards-compatible.

• FIX: Windows / SkSL shader compilation — eliminated all dynamic array index expressions from sdf.glsl. The previous getShapeSDFFromArray(int index) computed offsets at runtime, which SkSL/glslang on Windows rejects with "index expression must be constant". Replaced with literal-indexed sdf0()…sdf15() helpers and a fully-unrolled sceneSDF for 1–16 shapes. MAX_SHAPES stays 16; no API or visual change.

• TOOLING: scripts/validate_shaders.sh — macOS script that validates all shaders against Windows/SkSL compiler rules using glslangValidator. Run bash scripts/validate_shaders.sh before releasing. Requires brew install glslang (one-time).

---

Bug Fixes #

• FIX: Windows/Android build failure — three shader compilation errors on the SPIR-V/glslang path: loop bounds must be compile-time constants; dFdx/dFdy on a scalar float is rejected by glslang (geometry shader now uses #ifdef IMPELLER_TARGET_METAL to keep hardware derivatives on iOS/macOS and fall back to ±0.5 px finite differences on Vulkan/OpenGL ES); global non-constant initialisers at file scope in liquid_glass_final_render.frag moved into main().

• FIX: Blend-group asymmetry — the liquid-glass merge neck between grouped buttons leaned toward the left button. Fixed with a bidirectional smooth-union pass (L→R + R→L, averaged 50/50) that cancels the directional bias exactly.

---

Bug Fixes #

• FIX: Windows build (flutter build windows) — two shader issues fatal on SkSL/glslang but silently accepted on Metal: no match for min(int, int) (replaced with a ternary) and global non-constant initialisers (moved into main()). No visual change on any platform.

---

Bug Fixes #

• FIX: Windows build failure — uShapeData[MAX_SHAPES * 6] was passed as a by-value function parameter, which glslang rejects. Fixed by accessing it as a global uniform. No visual change.

Tweaks #

• TWEAK: GlassSearchableBottomBar iOS 26 Apple News parity — animated inline × clear button replaces microphone when text is present; simplified hit-testing layout replaces Overlay layers; guaranteed GPU liquid-glass merging between the search and dismiss pills in a single shader pass.

---

Tweaks #

• TWEAK: GlassThemeVariant.light now defaults to a cool-tinted glassColor (Color(0x32D2DCF0)), stronger refractiveIndex, and boosted ambientStrength to ensure premium specular rendering and visible refraction on flat white backgrounds.

Examples #

• Apple News demo — replaced Image.network calls with pre-sized bundled assets (example/assets/news_images/) to fix Impeller GPU command-buffer overflow on iOS 26 physical devices.
• Apple News demo — collapsedLogoBuilder now mirrors the active tab icon instead of a static badge.

---

Refactor #

• Internal: Removed GlassIndicatorTapMixin and migrated GlassTabBar and GlassSegmentedControl fully to raw Listener pointer events, matching GlassBottomBar's robust drag-cancel and press-and-hold handling. No API change.

---

Bug Fixes #

• FIX: LiquidGlassBlendGroup asymmetry — left buttons attracted their neighbours more strongly than right buttons in groups of 3+. Fixed with a bidirectional smooth-union pass (L→R + R→L, averaged 50/50). Two-shape groups are mathematically identical to before.

• FIX: GlassButtonGroup — glass effect could bleed as a dark rectangle on Impeller with GlassQuality.premium and useOwnLayer: true. A ClipRRect(antiAlias) now hard-clips the bleed at the superellipse boundary without forcing a quality downgrade.

---

Bug Fixes #

• FIX: GlassBottomBar / GlassSearchableBottomBar — added HitTestBehavior.opaque to the root GestureDetector so the full bar height reliably consumes pointer events on simulator and desktop.

• FIX: GlassSearchableBottomBar — keyboard no longer flickers on physical devices; focus is requested after the expansion animation completes.

• FIX: GlassSearchableBottomBar — dead zone at expanded search pill edges resolved; the full glass surface now claims taps and routes them to the search field.

New — GlassSearchBarConfig parameters #

Seven new parameters (all backwards-compatible):

Parameter	Type	Default	Description
autoFocusOnExpand	bool	false	Keyboard opens automatically on expand.
trailingBuilder	WidgetBuilder?	null	Replaces the mic icon with any custom widget.
textInputAction	TextInputAction?	null	Keyboard action key (search, done, go, …).
keyboardType	TextInputType?	null	Keyboard layout (url, emailAddress, …).
autocorrect	bool	true	Disable for codes, usernames, etc.
enableSuggestions	bool	true	Controls QuickType bar on iOS.
onTapOutside	TapRegionCallback?	null	Called when user taps outside the field.

---

New Components #

• GlassSearchableBottomBar — GlassBottomBar with a morphing search pill that shares the same AdaptiveLiquidGlassLayer as the tab pill, producing iOS 26 liquid-merge blending. When isSearchActive is true the tab pill collapses and the search pill expands via spring animation. Configured via GlassSearchBarConfig.

Examples #

• Apple News demo (example/lib/apple_news/apple_news_demo.dart) — iOS 26 Apple News replica showcasing GlassSearchableBottomBar.

Visual Fixes #

• FIX: Default glow color on press changed from iOS system blue to a brightness-adaptive neutral white (~35% light / ~22% dark), matching iOS 26 glass press behaviour.

---

Performance #

• PERF: Deleted unused rotate2d() from render.glsl — it was compiled into every shader binary but never called.
• PERF: Eliminated a redundant normalize() in interactive_indicator.frag by reusing an already-computed length.
• PERF: Removed a no-op canvas.save()/canvas.restore() pair in GlassGlow paint.

Bug Fixes #

• FIX: GlassGlow tracking — glow gradient is now correctly recreated each frame when glowOffset changes, fixing the spotlight freezing at its initial position.
• FIX: Glow on Skia/Web — LightweightLiquidGlass now wraps in GlassGlowLayer, giving the Skia path the same light-follows-touch behaviour as Impeller.
• FIX: Glow on first touch — spotlight now appears immediately at the tap position instead of sliding in from the widget's top-left corner.
• FIX: Glow tracking inside button groups — converted from widget-local to global coordinates so the spotlight correctly follows touches regardless of nesting depth.
• FIX: Glow radius on wide buttons — switched from shortestSide to √(width × height) so the spotlight scales proportionally to the button area.

---

Performance & Polish #

• PERF: Lightweight shader (lightweight_glass.frag) — reduced ALU instruction count ~10–15 ops per fragment; restored the normalZ Fresnel ramp to sqrt(1 − dot(n,n)).
• PERF: Impeller final render shader — eliminated length()/normalize() from anisotropic specular; made getHeight() fully branchless; collapsed four step() multiplications into one.
• PERF: Dart side — cached light direction trig in LiquidGlassRenderObject (only recomputed when lightAngle changes); changed GlassGroupLink.shapeEntries from List to Iterable to eliminate per-frame heap allocation.
• FIX: Adjusted GlassBottomBar, GlassTabBar, and GlassSegmentedControl spring from 500ms bouncySpring to 350ms snappySpring, matching iOS 26 segment-indicator physics.

---

Bug Fixes #

• FIX: GlassBottomBar, GlassTabBar, GlassSegmentedControl — rapid taps no longer prematurely snap the indicator, killing spring physics. Removed pixel-snapping from onHorizontalDragDown so taps correctly use spatial distance for the iOS 26 jump animation.

---

New Components #

• GlassDivider — iOS 26-style hairline separator, horizontal and vertical. Theme-adaptive opacity (dark: 20% white / light: 10% black).
• GlassListTile — iOS 26 Settings-style row with leading icon, title, subtitle, trailing widget, and automatic grouped dividers. Use inside a zero-padding GlassCard. Convenience constants: GlassListTile.chevron, GlassListTile.infoButton.
• GlassStepper — iOS 26 UIStepper equivalent. Compact −/+ glass pill with auto-repeat on hold, min/max clamping, wraps cycling, fractional step, and haptic feedback.
• GlassWizard + GlassWizardStep — multi-step flow with numbered indicators, checkmarks, and expandable step content.

Accessibility #

• GlassAccessibilityScope — reads platform Reduce Motion and Reduce Transparency preferences and propagates them to all glass widgets in its subtree:
  • Reduce Motion: spring animations snap instantly.
  • Reduce Transparency: replaces the full glass shader pipeline with a plain BackdropFilter(blur) + frosted container.
• Semantics updated across all remaining widgets to match iOS UIAccessibility conventions.

Performance #

• PERF: GlassSpecularSharpness enum — replaces pow(lightCatch, exponent) (two transcendentals per fragment) with a pure squaring chain in lightweight_glass.frag. Zero transcendentals. Default: .medium.
• PERF: pow(x, 1.5) → x·√x in Impeller edge lighting — sqrt() is a single hardware SFU instruction.
• PERF: Anisotropic specular and Fresnel rim brightening ported from the Impeller path to lightweight_glass.frag, closing the largest visual gap between rendering paths.
• PERF: Content-adaptive glass strength — intensity auto-adjusts based on backdrop luminance on Impeller, or MediaQuery.platformBrightness on Skia/Web.

Developer Experience #

• GlassRefractionSource — renamed from LiquidGlassBackground to better reflect its role. LiquidGlassBackground remains as a deprecated typedef (removed in 1.0.0).
• Synchronous background capture — rebuilt using boundary.toImageSync() on native (zero CPU↔GPU readback) and async toImage() on web.

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Visual Quality #

• FIX: True surface normal storage in geometry texture — the geometry pass now stores the SDF-gradient-derived surface normal instead of the refraction displacement vector. The render shader decodes and recomputes displacement via refract(). Specular highlights on blended glass shapes (e.g. two overlapping pills) now correctly follow true surface curvature rather than the refraction direction. Single-shape surfaces are visually identical to 0.6.0.
• FIX: Anisotropic specular highlights (Impeller) — specular lobe stretched 20% along the surface tangent, producing the horizontal oval highlight that matches iOS 26.
• FIX: Fresnel edge luminosity ramp (Impeller) — gentle brightness ramp at grazing angles matching iOS 26's centre-to-edge luminosity gradient.
• FIX: Luminosity-preserving glass tint in lightweight shader — replaced additive tint with the same applyGlassColor() model as the Impeller path: achromatic glass lifts toward white, chromatic glass shifts hue while preserving luminance.

Performance #

• PERF: Branchless smoothUnion — eliminated a conditional branch that caused warp divergence when glass shapes transition between merged and separate.
• PERF: if/else if dispatch in shape SDF — GPU now short-circuits after the first type match; default changed to 0.0 for a clearly visible failure mode.
• PERF: Single texture fetch when chromatic aberration is disabled — interactive_indicator.frag previously sampled the background three times unconditionally; 66% fewer texture reads in the common case.
• PERF: Flat-interior early-exit in final render shader — pixels where normalXY ≈ 0 skip refract() and all texture samples, replaced with a single background sample. Lossless.

---

Breaking Changes #

• LiquidGlassLayer.useBackdropGroup removed. Glass layers now automatically detect a BackdropGroup ancestor. Remove useBackdropGroup: true from any LiquidGlassLayer(...) calls.

New Features #

• LiquidGlassWidgets.wrap() — wraps your app in a GlassBackdropScope in one line:

  runApp(LiquidGlassWidgets.wrap(const MyApp()));
  

• GlassMotionScope — drives glass specular angle from any Stream<double> (e.g. device gyroscope). No new dependencies required.

Performance #

• PERF: GlassBackdropScope auto-activation — glass layers automatically share a single GPU backdrop capture when a scope ancestor is present.
• PERF: Local-space geometry rasterization — geometry texture cached until pill size or shape changes, eliminating per-frame rebuilds during animation.
• PERF: Shader UV bounds check — discards fragments where geometry UV falls outside [0, 1], preventing the thin "protruding line" artifact during jelly-physics expansion.

Visual #

• FIX: Refraction UV — uses uSize uniform (always valid on first frame) instead of textureSize() which returns (0,0) on the first frame in Impeller.
• FIX: precision highp float in final render shader (was mediump, risking colour banding on mobile).
• FIX: iOS 26 glass tint model — preserves backdrop luminance while shifting chroma. Replaces Photoshop Overlay mode.
• FIX: Leading-dot rim artifact — x / (1 + x) soft-clamping on highlight intensity prevents bright corner artifact during drag.
• FIX: Impeller indicator clipping — jelly physics animations no longer clip at the static bounding box (clipExpansion parameter added).
• FIX: Web & WASM — removed dart:io imports from shader resolution logic.

Dependencies #

• Removed motor dependency — replaced with self-contained glass_spring.dart. Zero third-party runtime dependencies beyond the Flutter SDK.

---

Breaking Changes #

LiquidGlass removed from the public API. It was inadvertently exposed and silently renders nothing on Skia/Web. Use AdaptiveGlass instead:

// Before
LiquidGlass(settings: LiquidGlassSettings(...), child: ...)

// After
AdaptiveGlass(settings: LiquidGlassSettings(...), child: ...)

LiquidGlassLayer, LiquidGlassBlendGroup, LiquidGlassSettings, LiquidShape, GlassGlow, and debugPaintLiquidGlassGeometry remain public.

New Features #

• GlassBackdropScope — halves GPU blur capture cost when multiple glass surfaces are on screen simultaneously. Wrap your MaterialApp or Scaffold to activate:

GlassBackdropScope(
  child: MaterialApp(
    home: Scaffold(
      appBar: GlassAppBar(...),
      bottomNavigationBar: GlassBottomBar(...),
    ),
  ),
)

Renderer #

The renderer from liquid_glass_renderer (whynotmake.it, MIT) is now vendored directly, giving full control over the rendering pipeline with no user-facing API changes.

---

Bug Fixes #

• FIX: GlassBottomBar and other surfaces now correctly respond to dynamic glassSettings changes on GlassQuality.standard — AdaptiveGlass in grouped mode now inherits settings from InheritedLiquidGlass instead of using empty defaults.
• FIX: Luminance-aware ambient floor for white glass on GlassQuality.standard — high-opacity white glass no longer renders as dark grey.

New #

• FEAT: GlassBottomBar.iconLabelSpacing — configurable vertical gap between tab icon and label (default: 4.0). Thanks @baneizalfe (#11).

Breaking Changes #

Library-wide IconData → Widget API migration. All icon parameters now accept any Widget:

// Before
GlassButton(icon: CupertinoIcons.heart, onTap: () {})

// After
GlassButton(icon: Icon(CupertinoIcons.heart), onTap: () {})
// Or any custom widget:
GlassButton(icon: SvgPicture.asset('assets/heart.svg'), onTap: () {})

GlassBottomBarTab.selectedIcon renamed to activeIcon to match Flutter's BottomNavigationBarItem convention.

---

New Components #

• GlassMenu / GlassMenuItem / GlassPullDownButton — iOS 26 morphing context menu with spring physics and position-aware expansion.
• GlassButtonGroup — joined-style container for related actions (e.g. Bold/Italic/Underline toolbar).
• GlassFormField / GlassPasswordField / GlassTextArea / GlassPicker — full iOS 26 input suite.
• GlassSideBar — vertical navigation surface with header, footer, and scrollable items.
• GlassToolbar — standard iOS-style action toolbar.
• GlassTabBar — horizontal tab navigation bar with animated indicator and scrollable mode for 5+ tabs.
• GlassProgressIndicator — circular and linear variants (indeterminate and determinate), iOS 26 specs.
• GlassToast / GlassSnackBar — 5 notification types, 3 positions, auto-dismiss, swipe-to-dismiss.
• GlassBadge — count and dot status badges, 4 positions.
• GlassActionSheet — iOS-style bottom-anchored action list.

Performance #

• Universal Platform Support — AdaptiveGlass and AdaptiveLiquidGlassLayer introduced. All 26 widgets deliver consistent glass quality on Web, Skia, and Impeller.
• Batch-blur optimisation — glass containers share a single BackdropFilter (was: one per widget). ~5× faster in common multi-widget layouts.
• Impeller pipeline warm-up — shaders pre-compile at startup to eliminate first-frame jank.

Theme System #

• GlassTheme / GlassThemeData / GlassThemeVariant — global styling and quality inheritance across all widgets. Set once, inherited everywhere.

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Early access and preview releases establishing the core widget library, initial glass rendering pipeline (LiquidGlass, LiquidGlassLayer, LiquidGlassBlendGroup), and foundational components (GlassBottomBar, GlassButton, GlassSwitch, GlassCard, GlassSearchBar, GlassSlider, GlassChip, GlassSegmentedControl, GlassSheet, GlassDialog, GlassIconButton).