progressive_background_blur 1.0.1

Progressive background blur widget to create smooth layered frosted glass effect for Flutter.

1.0.1

• Added a .pubignore file to keep CLAUDE.md and the .claude/ directory out of the pub.dev package archive. No changes to the public API or runtime behavior.

1.0.0

• First stable release. The public API is unchanged since 0.0.4 and is now considered stable: the ProgressiveBlur widget (begin / end, sigmaStart / sigmaEnd, optional child) and the static members ProgressiveBlur.precache(), ProgressiveBlur.shaderAssetKey, and ProgressiveBlur.maxSigma.
• Rebuilt the example app (example/lib/main.dart) as a bottom blur toolbar over a scrolling scene, with an End sigma slider (0–ProgressiveBlur.maxSigma) for tuning the blur strength live.
• Refreshed both READMEs to match the new example; the demo video was dropped in favor of a GIF.

0.0.4

• Removed the redundant outer ClipRect wrapper introduced in 0.0.3: the blur node is now returned directly, so one compositing clip layer is saved. No change to the public API or the documented usage limitations.
• Internal cleanup of ProgressiveBlur's build path (fewer intermediate assignments) and doc comments updated to match the current implementation.
• Documented per-platform Impeller availability in the READMEs, following the official Impeller docs: mandatory on iOS; default on Android API 29+ (older devices fall back to OpenGL and degrade gracefully); default since Flutter 3.47 on macOS / Linux / Windows (Flutter 3.41–3.46 still defaults to Skia there and degrades gracefully).

0.0.3

• Made ProgressiveBlur.child optional (Widget?, defaults to null). When omitted, the backdrop blur is still applied to the widget's own region (its size is determined by the parent's constraints); only the foreground content is absent, matching BackdropFilter's behavior.
• On the no-blur degradation paths (Skia backend, web, shader still loading, both sigmas 0), a null child now renders as a zero-sized placeholder instead of being skipped.
• Fixed the blur bleeding outside the widget's own bounds: the shader-based backdrop filter's output region is conservatively computed by the engine as the full-screen backdrop snapshot, so the blur could spill past the widget and linger as a full-screen smear during route slide/fade-out transitions until the node was destroyed. The widget is now wrapped in a ClipRect, so the blur is strictly confined to its own rect and moves, fades, and disposes with its page.

0.0.2

• Raised the minimum Flutter version from 3.3.0 to 3.41.0 (the Dart SDK constraint was relaxed from ^3.11.5 to ^3.11.0), as required by the shader-based ProgressiveBlur implementation introduced in 0.0.1.
• Declared the supported platforms (Android, iOS, Linux, macOS, Windows) in pubspec.yaml via the top-level platforms: field.
• Excluded web from the declared platforms, so pub.dev no longer shows a web platform tag. Web builds are unaffected — the widget still renders child unchanged there through the isShaderFilterSupported graceful-degradation path.

0.0.1

• Added the ProgressiveBlur widget, matching Figma Effects → Background blur → Progressive (Start / End): blur strength interpolates from sigmaStart to sigmaEnd along the line from begin to end, defaulting to top-to-bottom.
• begin / end accept any AlignmentGeometry, including AlignmentDirectional (resolved against the current Directionality).
• sigmaStart / sigmaEnd are clamped to 0–100 inclusive (the Figma range, exposed as ProgressiveBlur.maxSigma); both being 0 applies no blur.
• Pure-Dart fragment-shader implementation: a two-pass (horizontal / vertical) separable Gaussian convolution, no native code.
• Impeller only, detected at runtime via ui.ImageFilter.isShaderFilterSupported; on Skia and before the shader finishes loading, child is rendered unchanged.
• Added ProgressiveBlur.precache() to precompile the shader before runApp().