ShimmerEffect alters widget dimensions

[ifuterman]

trafficstars

Animation widget has its dimensions 1 px at the bottom and 1 px on the right side In this snipet container will be overflowed at the bottom by 1 px

Container(
  height: 86,
  color: Colors.red,
  child: Animate(
    effects: [
      ShimmerEffect(
      duration: 1000.ms,
      color: AppColors.shimmerAnimationCollor
      )
    ],
    controller: _animationController,
    onPlay: (controller) => controller.repeat(),
    child: Container(
      height: 86,
    )
 )
)

[gskinner]

This is because ShaderMask doesn't do a particularly good job with edges, so by default ShimmerEffect adds 0.5px of padding around the widget to avoid visual artifacts.

You can disable this by setting padding: EdgeOffsets.zero.

I think I can work around this by creating a PaddedShaderMask, having it apply the padding, but return the original dimensions for layout. I'll put it on my list, but feel free to look into it in the interim.