haze-utils/dev.chrisbanes.haze/createProgressiveBlurRenderEffect

createProgressiveBlurRenderEffect

fun createProgressiveBlurRenderEffect(blurRadiusPx: Float, size: Size, offset: Offset, mask: Shader): PlatformRenderEffect

Creates a separable progressive blur clipped to size at offset.

mask supplies the per-pixel blur intensity and blurRadiusPx supplies its maximum radius.

The shader samples at most 150 px either side of a pixel. Where a pixel's local radius (blurRadiusPx scaled by the mask intensity) exceeds that, the kernel is truncated but its Gaussian is still sized for the untruncated radius, so the result is weaker than a blur of that radius would be. blurRadiusPx is not clamped.

Haze Blur uses this effect on Android 13 (API 33) and newer and on Skiko platforms. Older Android versions approximate progressive blur with layered or masked platform blur instead.

fun createProgressiveBlurRenderEffect(blurRadiusPx: Float, size: Size, offset: Offset, mask: Shader, maskOrigin: Offset, repeatEdge: Boolean = false): PlatformRenderEffect

Creates a progressive blur with a mask origin independent of its crop bounds.

Blur taps are clamped to the crop. Each pixel's own (centre) sample is clamped inside the crop and, with repeatEdge, for one more pixel beyond it, so a downscaled result drawn back up does not blend its edge with the transparency outside. Further out, the centre sample is unclamped.