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jpeitz
Participating Frequently
Jun 23, 2011 7:51 AM UTC
Question

Stretched bitmaps blurred when rendered using GPU on iOS, how to avoid?

Hi,

in a project of mine (targeting iPhone 4) I'm using pixel art. To show it properly I stretch the bitmap using scaleX/scaleY. However, when rendering using GPU the bitmaps get blurred, ruining the clear pixel art effect that I am after. Rendering using CPU does not blur the bitmaps, but is slower.

Any ideas on how to tell the renderer not to blur bitmaps?

There was a similar questions raised in another thread ( http://forums.adobe.com/thread/866712 ) but it derailed into a benchmarking discussion.

Thank you in advance.

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4 replies

Colin Holgate
Colin Holgate
Inspiring
Jun 23, 2011 12:23 PM UTC

How much the GPU will smooth things is partly down to the stage quality. Try:

stage.quality = "low";

at the start of your movie, see if that's enough to make the GPU antialias less. Otherwise, use AIR 2.7, and then CPU mode ought to be fast enough for you.

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jpeitzAuthor
Participating Frequently
Jun 23, 2011 12:53 PM UTC

I'm afraid setting the quality to LOW does not help with the blurring. It actually doesn't change anything that I can see.

Already using 2.7 and so far I'm getting more speed with the GPU. I plan to show _a lot_ of sprites.

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x_a_n_d_e_r
x_a_n_d_e_r
Participating Frequently
Jun 30, 2011 11:49 AM UTC

Hi jpeitz,

Found a solution for it?

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