ActionScript 2.0 Language Reference - Adobe Help and Support

Example
The following example shows how to determine the destination rectangle that the
applyfilter() method affects:
import flash.display.BitmapData;
import flash.filters.BevelFilter;
import flash.geom.Rectangle;
var myBitmapData:BitmapData = new BitmapData(100, 80, true, 0xCCCCCCCC);
var filter:BevelFilter = new BevelFilter(5, 45, 0xFFFF00, 0.8, 0x0000FF,
0.8, 20, 20, 1, 3, "outter", false);
var filterRect:Rectangle =
myBitmapData.generateFilterRect(myBitmapData.rectangle, filter);
trace(filterRect); // (x=-31, y=-31, w=162, h=142)
getColorBoundsRect
(BitmapData.getColorBoundsRect method)
public getColorBoundsRect(mask:Number, color:Number, [findColor:Boolean]) :
Rectangle
Determines a rectangular region that fully encloses all pixels of a specified color within the
bitmap image.
For example, if you have a source image and you want to determine the rectangle of the image
that contains a nonzero alpha channel, you pass {mask: 0xFF000000, color:
0x00000000} as parameters. The entire image is searched for the bounds of pixels whose
(value & mask) != color. To determine white space around an image, you pass {mask:
0xFFFFFFFF, color: 0xFFFFFFFF} to find the bounds of nonwhite pixels.
Availability: ActionScript 1.0; Flash Player 8
Parameters
mask:Number - A hexadecimal color value.
color:Number - A hexadecimal color value.
findColor:Boolean [optional] - If the value is set to true, returns the bounds of a color
value in an image. If the value is set to false, returns the bounds of where this color doesn't
exist in an image. The default value is true.
Returns
Rectangle - The region of the image that is the specified color.
320 ActionScript classes