Flash MX 2004.
bitmapInstance.getBits()
None.
An object that contains width, height, depth, bits, and, if the bitmap has a color table, cTab properties. The bits element is an array of bytes. The cTab element is an array of color values of the form "#RRGGBB". The length of the array is the length of the color table. The byte array is meaningful only when referenced by a DLL or shared library. You typically use it only when creating an extensible tool or effect. For information on creating DLLs for use with Animate JavaScript, see "C-Level Extensibility"
Method; lets you create bitmap effects by getting the bits out of the bitmap, manipulating them, and then returning them to Animate.
The following code creates a reference to the currently selected object; tests whether the object is a bitmap; and traces the height, width, and bit depth of the bitmap:
var isBitmap = fl.getDocumentDOM().selection[0].instanceType;
if(isBitmap == "bitmap"){
var bits = fl.getDocumentDOM().selection[0].getBits();
fl.trace("height = " + bits.height);
fl.trace("width = " + bits.width);
fl.trace("depth = " + bits.depth);
}