v0.3.0

A minor version rather than a patch, for two changes in behaviour: under an
adaptive host the tab bar's accessory now wears the bar's branch instead of
its own, and GlassLoad counts only glass that draws. Existing code builds
unchanged.

Adaptive glass:

• The tab bar adapts, as one control. It did already, by accident, because
  the bar is a GlassBar, while the guide said it did not; its accessory, a
  GlassBar of its own, read its own backdrop, so a light bar could sit
  under a dark accessory as rows scrolled by. The accessory now wears the
  bar's verdict, and the two cross between branches together. The guide,
  the tab bar page and the README say so (#10).
• The GlassBackdropReading example, the site's "Content on the glass" and
  the skill picked an icon colour from reading.brightness, which switches
  at a different level from the glass: over a mid grey in the light
  appearance that is a white icon on light glass. They give
  GlassTheme.of(context).legibility().label for a colour now, and keep
  brightness for content that follows the backdrop itself (#11).

Cost:

• GlassLedger.read leaves glass that draws nothing out of the load. A
  control's drop at rest is a registered surface at materialize 0; it
  paints no glass and the host captured nothing for it, yet the ledger
  counted it, so twenty resting switches read as twenty captured surfaces
  and twenty surfaces of fragmentation excess. They are
  GlassLoad.restingSurfaceCount now, and in none of the other counts or
  areas (#12).
• GlassSurfaceRecord.draws and GlassSurfaceRecord.captured: the one test
  the host's capture and the ledger both use, where each kept its own.

Fixes:

• A GlassSurface removed under a held finger no longer asserts on the rest
  of the gesture: the binding keeps routing it to the targets of the down's
  hit test, and the surface transformed the position while detached (#13,
  by @melo936).
• GlassTabBar and GlassSegmentedControl removed under a held finger — a
  route popped, a list recycled the row — ignore the rest of the gesture.
  They moved animation controllers they had disposed, which asserts in debug
  and throws a null check in release. The button, switch, slider, stepper
  and page control are tested the same way and were already safe.
• A tab bar's accessory beside the collapsed circle keeps its lower rim. On
  the side-by-side layout the bar is 44 tall, and a 48-tall capsule centred
  on the circle hung 2 px past the bar's box, which clipped its bottom edge
  and corners. Beside the circle it is no taller than the circle now (#9).
• A surface that replaces another at the same rect draws. The host's
  oracle watches rectangles and a frame finds its slots by identity, so a
  swap that moved no rectangle, behind a repaint boundary of its own, held
  the capture and the newcomer drew nothing until something else changed —
  GlassMorph settling into a plain surface did. The host now retakes when
  the set of surfaces it captures for changes. The same check catches glass
  that comes back to the top rung at the rects it left.
• The capture walk counts a colour filter under an OpacityLayer that
  arrives through pushLayer, as it did under a composited one, and sends
  that subtree to the stock capture.
• FilteringCanvas drops a mask-filtered paint on every draw that takes a
  paint — points, images, vertices, atlases — not only on the shapes, as
  dropMaskFiltered is documented to.
• GlassMenuAnchor, GlassPopoverAnchor and a GlassPageControl given a
  PageController create their animation controller in initState. Never
  opened, or never animated, they created it for the first time in
  dispose, which Flutter tolerates only from 3.47.
• A GlassMenuController given to a GlassMenuAnchor or a
  GlassPopoverAnchor in a rebuild drives it. The anchor kept the
  controller it was built with for life, so the new one's open and
  close did nothing; taken away, the anchor's own takes over, and an open
  panel stays open.
• A GlassPageControl whose PageController is taken away shows
  currentPage. Its own position stood still while the controller led, so
  a currentPage moved meanwhile was not shown, nor told to a screen
  reader, until it moved again.
• The capture walk keeps its count of open opacities when a painter throws
  inside pushOpacity, as it does in pushLayer. The count stayed raised,
  and every colour filter later in the pass was sent to the stock capture.
• GlassBadge, GlassScaffold and GlassTabBar build without an ambient
  Directionality (#8).
• The site's service worker precaches the shaders with the code that writes
  their uniforms: a returning browser ran the cached code of its last visit
  against the new shaders, and a press drew the glass black (#8).

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https://pub.dev/packages/g1455/versions/0.3.0