drip_flutter 0.2.0-alpha

Flutter render layer for DRIP — direct RenderObject binding with zero widget rebuilds.

0.2.0-alpha - 2026-05-13

First release of drip_flutter — the Flutter direct render binding layer.

Added

• DripBinding<T> — live RenderObject subscriber: applies state changes directly to render properties, bypassing the widget/element rebuild cycle.
• DripText — zero-rebuild text widget binding DripState<String> to RenderParagraph.text via markNeedsLayout().
• DripOpacity — zero-rebuild opacity widget binding DripState<double> to opacity via markNeedsPaint(); clamps to [0.0, 1.0].
• DripColor — zero-rebuild background color widget binding DripState<Color> via markNeedsPaint().
• DripTransform — zero-rebuild matrix transform widget binding DripState<Matrix4> via markNeedsPaint().
• DripImage — ImageProvider binding with async image resolution.
• DripCustomBinding<T> — abstract base class for custom RenderObject bindings.
• DripFrame<T> — structural state boundary (controlled rebuild trigger).
• DripFrameBuilder<T> — StatefulWidget that rebuilds when DripFrame updates.

Performance

• Verified: 1000 simultaneous DripState writes → 0 widget build() calls.
• Demo app demo_grid: 1000-cell live grid, zero rebuilds at 60fps.

Architecture

• Invariant 2 enforced: zero setState() calls in binding code path.
• Invariant 7 enforced: all bindings deregistered in didUnmountRenderObject.
• DripFrame is the only intentional setState() path, documented explicitly.