Package | flash.filters |
Class | public final class GlowFilter |
Inheritance | GlowFilter BitmapFilter Object |
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
distance
and angle
properties of the drop shadow filter set to 0.
You can apply the filter to any display object (that is, objects that inherit from the DisplayObject class),
such as MovieClip, SimpleButton, TextField, and Video objects, as well as to BitmapData objects.
The use of filters depends on the object to which you apply the filter:
- To apply filters to display objects, use the
filters
property (inherited from DisplayObject). Setting thefilters
property of an object does not modify the object, and you can remove the filter by clearing thefilters
property. - To apply filters to BitmapData objects, use the
BitmapData.applyFilter()
method. CallingapplyFilter()
on a BitmapData object takes the source BitmapData object and the filter object and generates a filtered image as a result.
If you apply a filter to a display object, the cacheAsBitmap
property of the
display object is set to true
. If you clear all filters, the original value of
cacheAsBitmap
is restored.
This filter supports Stage scaling. However, it does not support general scaling, rotation, and
skewing. If the object itself is scaled (if scaleX
and scaleY
are
set to a value other than 1.0), the filter is not scaled. It is scaled only when the user zooms
in on the Stage.
A filter is not applied if the resulting image exceeds the maximum dimensions. In AIR 1.5 and Flash Player 10, the maximum is 8,191 pixels in width or height, and the total number of pixels cannot exceed 16,777,215 pixels. (So, if an image is 8,191 pixels wide, it can only be 2,048 pixels high.) In Flash Player 9 and earlier and AIR 1.1 and earlier, the limitation is 2,880 pixels in height and 2,880 pixels in width. For example, if you zoom in on a large movie clip with a filter applied, the filter is turned off if the resulting image exceeds the maximum dimensions.
See also
flash.display.DisplayObject.filters
flash.display.DisplayObject.cacheAsBitmap
flash.display.DisplayObject.scaleX
flash.display.DisplayObject.scaleY
flash.filters.DropShadowFilter.distance
flash.filters.DropShadowFilter.angle
Property | Defined By | ||
---|---|---|---|
alpha : Number
The alpha transparency value for the color. | GlowFilter | ||
blurX : Number
The amount of horizontal blur. | GlowFilter | ||
blurY : Number
The amount of vertical blur. | GlowFilter | ||
color : uint
The color of the glow. | GlowFilter | ||
constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | ||
inner : Boolean
Specifies whether the glow is an inner glow. | GlowFilter | ||
knockout : Boolean
Specifies whether the object has a knockout effect. | GlowFilter | ||
prototype : Object [static]
A reference to the prototype object of a class or function object. | Object | ||
quality : int
The number of times to apply the filter. | GlowFilter | ||
strength : Number
The strength of the imprint or spread. | GlowFilter |
Method | Defined By | ||
---|---|---|---|
GlowFilter(color:uint = 0xFF0000, alpha:Number = 1.0, blurX:Number = 6.0, blurY:Number = 6.0, strength:Number = 2, quality:int = 1, inner:Boolean = false, knockout:Boolean = false)
Initializes a new GlowFilter instance with the specified parameters. | GlowFilter | ||
[override]
Returns a copy of this filter object. | GlowFilter | ||
Indicates whether an object has a specified property defined. | Object | ||
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | ||
Indicates whether the specified property exists and is enumerable. | Object | ||
Sets the availability of a dynamic property for loop operations. | Object | ||
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | ||
Returns the string representation of the specified object. | Object | ||
Returns the primitive value of the specified object. | Object |
alpha | property |
alpha:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
The alpha transparency value for the color. Valid values are 0 to 1. For example, .25 sets a transparency value of 25%. The default value is 1.
Implementation
public function get alpha():Number
public function set alpha(value:Number):void
blurX | property |
blurX:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
The amount of horizontal blur. Valid values are 0 to 255 (floating point). The default value is 6. Values that are a power of 2 (such as 2, 4, 8, 16, and 32) are optimized to render more quickly than other values.
Implementation
public function get blurX():Number
public function set blurX(value:Number):void
blurY | property |
blurY:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
The amount of vertical blur. Valid values are 0 to 255 (floating point). The default value is 6. Values that are a power of 2 (such as 2, 4, 8, 16, and 32) are optimized to render more quickly than other values.
Implementation
public function get blurY():Number
public function set blurY(value:Number):void
color | property |
color:uint
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
The color of the glow. Valid values are in the hexadecimal format 0xRRGGBB. The default value is 0xFF0000.
Implementation
public function get color():uint
public function set color(value:uint):void
inner | property |
inner:Boolean
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
Specifies whether the glow is an inner glow. The value true
indicates
an inner glow. The default is false
, an outer glow (a glow
around the outer edges of the object).
Implementation
public function get inner():Boolean
public function set inner(value:Boolean):void
knockout | property |
knockout:Boolean
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
Specifies whether the object has a knockout effect. A value of true
makes the object's fill transparent and reveals the background color of the document. The
default value is false
(no knockout effect).
Implementation
public function get knockout():Boolean
public function set knockout(value:Boolean):void
quality | property |
quality:int
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
The number of times to apply the filter. The default value is BitmapFilterQuality.LOW
,
which is equivalent to applying the filter once. The value BitmapFilterQuality.MEDIUM
applies the filter twice; the value BitmapFilterQuality.HIGH
applies it three times.
Filters with lower values are rendered more quickly.
For most applications, a quality
value of low, medium, or high is sufficient.
Although you can use additional numeric values up to 15 to achieve different effects,
higher values are rendered more slowly. Instead of increasing the value of quality
,
you can often get a similar effect, and with faster rendering, by simply increasing the values
of the blurX
and blurY
properties.
Implementation
public function get quality():int
public function set quality(value:int):void
See also
strength | property |
strength:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
The strength of the imprint or spread. The higher the value, the more color is imprinted and the stronger the contrast between the glow and the background. Valid values are 0 to 255. The default is 2.
Implementation
public function get strength():Number
public function set strength(value:Number):void
GlowFilter | () | Constructor |
public function GlowFilter(color:uint = 0xFF0000, alpha:Number = 1.0, blurX:Number = 6.0, blurY:Number = 6.0, strength:Number = 2, quality:int = 1, inner:Boolean = false, knockout:Boolean = false)
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
Initializes a new GlowFilter instance with the specified parameters.
Parameterscolor:uint (default = 0xFF0000 ) — The color of the glow, in the hexadecimal format
0xRRGGBB. The default value is 0xFF0000.
| |
alpha:Number (default = 1.0 ) — The alpha transparency value for the color. Valid values are 0 to 1. For example,
.25 sets a transparency value of 25%.
| |
blurX:Number (default = 6.0 ) — The amount of horizontal blur. Valid values are 0 to 255 (floating point). Values
that are a power of 2 (such as 2, 4, 8, 16 and 32) are optimized
to render more quickly than other values.
| |
blurY:Number (default = 6.0 ) — The amount of vertical blur. Valid values are 0 to 255 (floating point).
Values that are a power of 2 (such as 2, 4, 8, 16 and 32) are optimized
to render more quickly than other values.
| |
strength:Number (default = 2 ) — The strength of the imprint or spread. The higher the value,
the more color is imprinted and the stronger the contrast between the glow and the background.
Valid values are 0 to 255.
| |
quality:int (default = 1 ) — The number of times to apply the filter. Use the BitmapFilterQuality constants:
For more information, see the description of the | |
inner:Boolean (default = false ) — Specifies whether the glow is an inner glow. The value true specifies
an inner glow. The value false specifies an outer glow (a glow
around the outer edges of the object).
| |
knockout:Boolean (default = false ) — Specifies whether the object has a knockout effect. The value true
makes the object's fill transparent and reveals the background color of the document.
|
See also
clone | () | method |
override public function clone():BitmapFilter
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0 Flash Player 9 |
Returns a copy of this filter object.
ReturnsBitmapFilter — A new GlowFilter instance with all the
properties of the original GlowFilter instance.
|
- Import the required classes.
- Declare three properties used in the
draw
method, which uses methods of the Graphics class accessed through thegraphics
property of Sprite to draw an orange square. - Create the constructor function, which does the following:
- Calls the
draw
method. - Creates a new BitmapFilter object named
filter
and assigns it the return value of a call togetBitmapFilter()
, which defines the filter. - Creates a new array named
myFilters
and addsfilter
to it. - Assigns
myFilters
to thefilters
property of the BevelFilterExample object. This applies all filters found inmyFilters
, which in this case is onlyfilter
.
- Calls the
package { import flash.display.Sprite; import flash.events.Event; import flash.events.MouseEvent; import flash.filters.BitmapFilter; import flash.filters.BitmapFilterQuality; import flash.filters.GlowFilter; public class GlowFilterExample extends Sprite { private var bgColor:uint = 0xFFCC00; private var size:uint = 80; private var offset:uint = 50; public function GlowFilterExample() { draw(); var filter:BitmapFilter = getBitmapFilter(); var myFilters:Array = new Array(); myFilters.push(filter); filters = myFilters; } private function getBitmapFilter():BitmapFilter { var color:Number = 0x33CCFF; var alpha:Number = 0.8; var blurX:Number = 35; var blurY:Number = 35; var strength:Number = 2; var inner:Boolean = false; var knockout:Boolean = false; var quality:Number = BitmapFilterQuality.HIGH; return new GlowFilter(color, alpha, blurX, blurY, strength, quality, inner, knockout); } private function draw():void { graphics.beginFill(bgColor); graphics.drawRect(offset, offset, size, size); graphics.endFill(); } } }
Fri Mar 19 2010, 02:45 AM -07:00