Be sure to include ImageUtils and ResizeStyle in your classpath.

Your approach is still of value of course, because a stage.quality of BEST has *many* performance implications, certainly valuable to be able to opt-in to HQ as needed.

So my class in the end resizes this particular size from 1000×750 to 800×600 first (the odd size first and halves after that), then 400×300, then 200×150, then 100×75. This was the best result of all the methods.

Great class! :)

I was trying to see the images but they are too small. Can you upload a large version so we can do comparisons? THX

I stumbled upon your class today and found it quite a nice little utility. I ran into one major issue that I wanted to pass on, in terms of memory leaks with giant .jpg files.

Within ImageUtils.as if you add after the following lines the following code, your memory usage will go from 100’s of Megabytes to 100’s of Kilobytes:

After Line 146: source.dispose();

After Line 160: bitmapData.dispose();

Even though you are reassigning your temp value to bitmapData and source, the bytes allocated for the initial giant images are still kept in memory.

Doing dispose() before a reassignment ensures that all byte data is destroyed.

I can send you an updated file if you like.

Best,

-Scott

Thanks I wish you everything best :)

However, when using Flash’s scaling, 3D, rotation, etc. Flash has control over how it gets drawn. You have no control over it. So when you adjust the scale of the MovieClip Flash is doing the drawing.

If you want the best quality, you’ll need to redraw this manually. A simple option would be to have the thumb start out at 80% of the size and the _xscale/_yscale at 100. Then on rollover replace the thumb with the 100% size and set the scale to 80, and let it tween to 100. When you roll out, tween the scale back to 80 and once it is done, replace the thumb with an 80% sized thumb and set the scale to 100.

This way you are only using the default Flash rendering while it is tweening, but you use the bitmap rendering when it is at rest.

I hope that makes sense. Good luck!

First of all please excuse my bad English and thank you for sharing this amazing idea and code :)

I have used your code to build a thumbnail gallery and everything works and looks perfect. Unfortunately I met one problem when decided to scale down (80% for example) these thumbs. I mean to scale down a movieclips that contain resized ( with resizeImage() ) JPGs. I did this because I wanted to make a simple RollOver effect for each thumb. On RollOver I have tween of the given movieclip _xscale=_yscale=100 and on RollOut I have tween _xscale=_yscale=80 … (just for the record I am using TweenMax of greensock.com )

So when I scale down these movieclips I have the problem with antiliasing although all used .draw() methods have parameter smooth=true … unfortunately movieclip’s parameter forceSmoothing=true is working only with externally loaded (with loadMovie()) images but not with images created with BitmapData and attachBitmap …

I am very curious if there is some solution of that problem and will be very thankful to hear some opinions/ideas

Thanks in advance and once again big congrats for you work :)