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[electrolyte]

Hi there

I'm trying to blur a bitmap data object but the target platform is Android / Mobile which doesn't support (as far as I'm aware) filters.

Has anyone got any ideas how a blur effect can be achieved? I have a bitmap, 256 X 256 that needs blurring, it’s not in a game loop so could loop through the bitmap data but not sure where to start …

[st33d]

Can you not blur the assets before they're imported?

I've not seen blur disabled before unless you're running Stage3D.

[electrolyte]

The asset bitmap is dynamic,

I sorted it after discovering this:

import fl.motion.Color;
Color.interpolateColor(colour1,colour2,ratio)

Then wrote a cheeky function that goes through the pixels, every other one, and plots a new colour half way between, if that makes sense :D

<edit>





This is after a few minutes code, so will mess around with it some more to stop that right edge messing up. I quite like the lo-fi blur effect!

[st33d]

You should be searching for a Gaussian Blur algorithm.

This one should be fast:

http://incubator.quasimondo.com/processing/superfast_blur.php

It's written in Processing: http://incubator.quasimondo.com/processing/superfastblur.pde

All you really have to know to port it is that the "pixels" property of img is a one dimensional array describing a list of the pixels in the image.

You just need to convert references to that array to calls to getPixel.

[BorisTheBrave]

You can also do a blur, even guassian, without any pixel manipulations by just drawing the same image multiple times at different offsets - on some platforms this can be much faster than doing it manually.

I actually quite like your lo-fi effect though.

[st33d]

fair point

pixel art and blur are not bed fellows

that always pissed me off about swords and sworcery

[X-Tender]

Sorry for the little OffTopic question but, did you use RAW Flash + AIR to make it run on Mobile or run on a stage3D and a framework like Starling?

[goshki]

I actually quite like your lo-fi effect though.

Yeah, the mobile version looks better and more consistent.

[electrolyte]

Sorry for the little OffTopic question but, did you use RAW Flash + AIR to make it run on Mobile or run on a stage3D and a framework like Starling?

Yeah, it's just pure flash published to AIR / Android / iOS. I've not used a framework ... but should really but for this type of game having my own bitmap blitter seems to be ok. Starling is the way forward tho :D

[GroZZleR]

BitmapData.applyFilter() should be a lot faster than looping through every pixel if it gives you the same effect.