image_color_backdrop 0.1.0

Extracts the dominant, vibrant or muted color from an image, icon or logo and turns it into a background color with opacity, tint, contrast and gradient controls.

Changelog

All notable changes to this package are documented here. The format follows Keep a Changelog and the package adheres to Semantic Versioning.

0.1.0

Initial release.

Added

• ImageBackdrop: a container whose background color is picked from an image, with ImageBackdrop.image for the common "image on its own color" case, gradients, rounded corners, shadows, animated color changes and automatic readable text/icon colors.
• BackdropColorBuilder: hands the picked color (BackdropResult) to any widget you build.
• BackdropController: a ChangeNotifier to share the color across widgets and re-style it live.
• ImageColorBackdrop and the ImageProvider.backdropColor() / backdropPalette() extensions: a plain Future API without widgets.
• BackdropStyle with opacity, brightness, saturation, blendColor, blendAmount and ensureContrastWith, plus the presets original, soft, pastel, deep and subdued.
• BackdropOptions with six color strategies (dominant, vibrant, muted, average, lightest, darkest), sampled regions (whole, center, edges, quarters and custom rectangles), ignoreNearWhite, ignoreNearBlack, transparency threshold and sampling size.
• Pure Dart histogram + median cut ColorQuantizer, an in-memory LRU BackdropCache, request de-duplication, and BackdropColorUtils (contrast ratio, readable foreground, lighten/darken).
• Example app with a gallery, a live playground and "use the color elsewhere" demos.