Underlying type of GaussianBlur but with customizable downscale. Generally, use GaussianBlur.

#include <AUI/ASS/Property/Backdrop.h>

Public Member Functions#
bool	operator== (const GaussianBlurCustom &) const =default

Signals and public fields#
AMetric	radius = 6_dp
	blur radius.

int	downscale = 1
	downscale factor. =1 equals don't affect. Must be positive.

Member Data Documentation#

◆ downscale#

int ass::Backdrop::GaussianBlurCustom::downscale = 1

Effective blur radius is radius * downscale. However, the downscale part is done by cheap downscaling of the framebuffer texture. Thus, by raising downscale factor you can achieve larger blur radius with approximately same visual result.

Performance benefit of downscale factor { .radius = 6_dp, .downscale = x } in comparison to { .radius = 6_dp * x, .downscale = 1 } is x^2.

view with_style {
  Backdrop { Backdrop::GaussianBlur { .radius = 6_dp, .downscale = 4 } },
}

is visually approximately same as

view with_style {
  Backdrop { Backdrop::GaussianBlur { .radius = 24_dp } },
}

but 16 times cheaper.

◆ radius#

AMetric ass::Backdrop::GaussianBlurCustom::radius = 6_dp

Performance costs of radius is O^2. Please use downscale factor to approximate large blur radius.

Contents

Public Member Functions

Signals and public fields

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