widgets/effects/progressive_blur library

Classes

ProgressiveBlur

A progressive (graduated) backdrop blur — the Signal / iOS-26 header look: a clean gaussian frost that is strongest at one edge and eases to perfectly sharp at the opposite edge. Stack it behind a translucent app bar so content dissolves beneath it instead of ending on a hard cut-off.

Enums

ProgressiveBlurDirection

The edge a ProgressiveBlur is strongest at; it eases to perfectly sharp at the opposite edge. Named after the direction the blur travels — e.g. topToBottom is heavy at the top and dissolves downward (the classic app-bar / status-bar look), bottomToTop is heavy at the bottom (e.g. a bottom bar or a fade above a docked toolbar).

Functions

progressiveBlurUniforms({required Offset origin, required Size size, required double devicePixelRatio, required double maxSigma, required double falloff, required ProgressiveBlurDirection direction, required double axis}) → List<double>

The eight uniforms describing the blur region, in the order the program declares them (float indices 2-9).