# Bitmap aspect ratio question

**URL:** https://forum.kirupa.com/t/bitmap-aspect-ratio-question/295712
**Category:** Uncategorized
**Created:** [September 3, 2009, 9:35am UTC](https://forum.kirupa.com/t/bitmap-aspect-ratio-question/295712 "2009-09-03T09:35:42Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![intan](https://avatars.discourse-cdn.com/v4/letter/i/3bc359/32.png) [@intan](https://forum.kirupa.com/u/intan)
#### Post date: [September 3, 2009, 9:35am UTC](https://forum.kirupa.com/t/bitmap-aspect-ratio-question/295712/1 "2009-09-03T09:35:42Z")

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Hi Kirupa,

I found a thread in [actionscript.com](http://actionscript.com) that resizes a bg image beautifully (without any pixelation whatsoever), except that there is a minor glitch in the script that doesn’t load properly. What does the solution mean: “try waiting until after the image is loaded. call your setBackground(); function from the onLoadInit”

Here is the script:

import flash.display.\*;  
// this tells Flash NOT to allow the assets to be scaled  
Stage.scaleMode = “noScale”;  
Stage.align = “TL”;

// need to set up a listener object to say when the stage is resized.  
var stageListener:Object = new Object();  
Stage.addListener(stageListener);

setBackground();

// called when the stage is resized  
stageListener.onResize = function() {  
setBackground();  
}

function loadBitmapSmoothed(url:String, target:MovieClip) {  
// Create a movie clip which will contain our unsmoothed bitmap  
var bmc:MovieClip = target.createEmptyMovieClip(“bmc”,target.getNextHi ghestDepth());

// Create a listener which will notify us when the bitmap loaded successfully  
var listener:Object = new Object();  
// Track the target  
listener.tmc = target;

// If the bitmap loaded successfully we redraw the movie into  
// a BitmapData object and then attach that BitmapData to the target  
// movie clip with the smoothing flag turned on.  
listener.onLoadInit = function(mc:MovieClip) {  
mc.\_visible = false;  
var bitmap:BitmapData = new BitmapData(mc.\_width, mc.\_height, true);  
this.tmc.attachBitmap(bitmap, this.tmc.getNextHighestDepth(),“auto”, true);  
bitmap.draw(mc);  
};

// Do it, load the bitmap now  
var loader:MovieClipLoader = new MovieClipLoader();  
loader.addListener(listener);  
loader.loadClip(url, bmc);  
}

// Sample code

createEmptyMovieClip(“mc1”, getNextHighestDepth());  
mc1.createEmptyMovieClip(“mc”, mc1.getNextHighestDepth());  
[//mc1.mc.loadMovie](https://mc1.mc.loadMovie)(“flash.jpg”);  
loadBitmapSmoothed(“flash.jpg”, mc1.mc);  
function setBackground() {

// determine middle  
var middleX = Stage.width/2;  
var middleY = Stage.height/2;

// scale background to fit width and height  
mc1.mc.\_width = Stage.width;  
mc1.mc.\_height = Stage.height;

// see if it grew bigger horizontally or vertically and adjust other to match  
// to maintain aspect ratio  
mc1.mc.\_xscale \> mc1.mc.\_yscale ? mc1.mc.\_yscale = mc1.mc.\_xscale : mc1.mc.\_xscale = mc1.mc.\_yscale;

}  
setBackground();

The full thread can be seen here:  
[http://www.actionscripts.org/forums/](http://www.actionscripts.org/forums/)…php3?t=139207

Any help is kindly appreciated. Tks.