Blur filter

The BlurFilter class smears, or blurs, a display object and its contents. Blur effects are useful for giving the impression that an object is out of focus or for simulating fast movement, as in a motion blur. By setting the quality property of the blur filter too low, you can simulate a softly out-of-focus lens effect. Setting the quality property to high results in a smooth blur effect similar to a Gaussian blur.

The following example creates a circle object using the drawCircle() method of the Graphics class and applies a blur filter to it:

import flash.display.Sprite;
import flash.filters.BitmapFilterQuality;
import flash.filters.BlurFilter;

// Draw a circle.
var redDotCutout:Sprite = new Sprite();
redDotCutout.graphics.lineStyle();
redDotCutout.graphics.beginFill(0xFF0000);
redDotCutout.graphics.drawCircle(145, 90, 25);
redDotCutout.graphics.endFill();

// Add the circle to the display list.
addChild(redDotCutout);

// Apply the blur filter to the rectangle.
var blur:BlurFilter = new BlurFilter();
blur.blurX = 10;
blur.blurY = 10;
blur.quality = BitmapFilterQuality.MEDIUM;
redDotCutout.filters = [blur];