Visuals appear blurred under GPU mode.

Question

Hi folks,
How to avoid the blurry effect when render in GPU mode? I attempt to set quality to "LOW" but still get the same "filtered" look. To the contrary, in CPU mode things appear far clearer and sharper, bitmaps tend to be pixelated, but this is just what I wanted.
Any help is appreciated!

Answer 1

I guess that stage.quality = "low" ought to do that, but I tried, and it didn't help.
About blitting, I just did a test. Using the code below I timed how long it takes to copypixels a 512x512 square a thousand times. I had the frame rate set to 100 fps, to make the arithmetic easier. On a test movie for Android it took about 10.7 seconds (10 would be perfect). On Android set to CPU it was about 20 seconds, and set to GPU it was 30 seconds. That makes the frame rate be about 50 fps for CPU and 33 fps for GPU.
Those tests were on a high end dual core Honeycomb tablet, and I used Advanced Task Manager to force quit all apps before running the test to give it the best chance. I also tried the test on my iPad 2, and the results weren't quite what I expected. For the iPad, the CPU time was about 19 seconds, and GPU was 17 seconds. That's about 52 fps and 59 fps, so both better than on the Android, but strangely the GPU mode worked slightly better.
So, imperfections in my theory aside, blitting with GPU is about 50% slower than CPU on Android, and only slightly quicker on iOS.
Here's my test code ("tf" is a text field already on the stage):
import flash.display.BitmapData;
import flash.display.Bitmap;
var bmd0:BitmapData = new BitmapData(512,512,false,0x000000);
var bmd1:BitmapData = new BitmapData(512,512,false,0xff0000);
var bmd2:BitmapData = new BitmapData(512,512,false,0xffff00);
var bnum:int = 1;
var p:Point = new Point(0,0);
var r:Rectangle = new Rectangle(0,0,512,512);
var c:int = 0;
var b:Bitmap = new Bitmap(bmd0);
addChild(b);
var t:int = getTimer();
addEventListener(Event.ENTER_FRAME,blit);
function blit(e:Event) {
c++;
bnum = 1 - bnum;
if (bnum) {
bmd0.copyPixels(bmd1,r,p);
} else {
bmd0.copyPixels(bmd2,r,p);
if (c==1000) {
tf.text = String(getTimer()-t);
removeEventListener(Event.ENTER_FRAME,blit);