ActionScript 2.0 Language Reference - Adobe Help and Support

import flash.geom.ColorTransform;
var myBitmapData:BitmapData = new BitmapData(100, 80, false, 0x00CCCCCC);
var mc:MovieClip = this.createEmptyMovieClip("mc",
this.getNextHighestDepth());
mc.attachBitmap(myBitmapData, this.getNextHighestDepth());
mc.onPress = function() {
myBitmapData.colorTransform(myBitmapData.rectangle, new
ColorTransform(1, 0, 0, 1, 255, 0, 0, 0));
}
See also
ColorTransform (flash.geom.ColorTransform), Rectangle (flash.geom.Rectangle)
compare (BitmapData.compare method)
public compare(otherBitmapData:BitmapData) : Object
Compares two BitmapData objects. If the two BitmapData objects have the same dimensions
(width and height), the method returns a new BitmapData object, in which each pixel is the
"difference" between the pixels in the two source objects:
■ If two pixels are equal, the difference pixel is 0x00000000.
■ If two pixels have different RGB values (ignoring the alpha value), the difference pixel is
0xFFRRGGBB where RR/GG/BB are the individual difference values between red, green,
and blue channels. Alpha channel differences are ignored in this case.
■ If only the alpha channel value is different, the pixel value is 0xZZFFFFFF, where ZZ is
the difference in the alpha value.
For example, consider the following two BitmapData objects:
var bmd1:BitmapData = new BitmapData(50, 50, true, 0xFFFF0000);
var bmd2:BitmapData = new BitmapData(50, 50, true, 0xCCFFAA00);
var diffBmpData:BitmapData = bmd1.compare(bmd2);
Note: The colors used to fill the two BitmapData objects have slightly different RGB values
(0xFF0000 and 0xFFAA00). The result of the compare() method is a new BitmapData
object with each pixel showing the difference in the RGB values between the two bitmaps.
Consider the following two BitmapData objects, in which the RGB colors are the same, but
the alpha values are different:
var bmd1:BitmapData = new BitmapData(50, 50, true, 0xFFFFAA00);
var bmd2:BitmapData = new BitmapData(50, 50, true, 0xCCFFAA00);
var diffBmpData:BitmapData = bmd1.compare(bmd2);
310 ActionScript classes