Printing swf error (no alpha channel?)

Question

Hi,
I don't know if this has been covered before but I have tried the following:
Printing to PDF via the print menu from the swf
and
Printing to paper via the print menu from the swf
In both cases, the images that are on screen are PNGs created as a PNG sequence from After Effects.  They contain alpha channels and the background of the swf is non-white.  However the bounding box of the image gets printed as white, so I have  a sequence of overlapping white regions, some of which occlude the image beneath.  With alpha channels on the monitor, this is not apparent, but when on paper or in PDF format the occlusion is clear.  I don't mind the white background; however I cannot deal with the occlusion.  How can I solve this?
Sincerely,
-markerline

Answer 1

Eureka!! That works better than a vacuum cleaner.  Only problem is I was using the AS3 reference and some of the PrintJob examples that were listed threw errors so I had to use the final example:
package
    import flash.printing.PrintJob;
    import flash.display.Sprite;
    public class BasicPrintExample extends Sprite
        var myPrintJob:PrintJob = new PrintJob();
        var mySprite:Sprite = new Sprite();
        mySprite.graphics.beginFill(0x336699);
    mySprite.graphics.drawCircle(100, 100, 50);
        public function BasicPrintExample()
            if (myPrintJob.start()) {
            try {
                myPrintJob.addPage(mySprite);
            catch(e:Error) {
                // handle error
            myPrintJob.send();
I did away with the package and the class and just called the function as a mouse event for a print-button.  I'm not sure why the if(myPrintJob.start()) call works because nowhere am I declaring the print job to start.  I guess that's something that happens automatically?