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Question by rudolfwm · Feb 21, 2011 at 03:47 PM · texturewwwdownloadtextureformat

WWW 16 bits textureformat download possible?

Is it possible to download textures which are 16bits into a 16bits texture directly?

Right now, when its downloaded its always 32 bits. Which is silly, since I want the 16bits. SO I need to convert it to another texture...

Can it be done in one go?

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avatar image rudolfwm · Feb 21, 2011 at 04:09 PM 0
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  1. The texture I download is in 16bits format.

  2. When its downloaded the www.texture.textureformat is 32 bits

  3. When I make a 16bits texture and use LoadImageIntoTexture it becomes a 32bits texture!

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Answer by Eric5h5 · Feb 21, 2011 at 06:50 PM

No, 16-bit is not supported for downloads through WWW. There's no such thing as a 16-bit JPG or PNG anyway.

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avatar image rudolfwm · Feb 22, 2011 at 07:51 AM 0
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Good point, I would like to point out the following though: I use a .NET tool to download and process images from a website that I need in the app. When I set the bitformat to System.Drawing.Imaging.PixelFormat.Format16bppRgb565 the SIZE of the fileis 92.7 Kb versus 172.3 Kb when I use the default format. Based on this I assumed (perhaps wrongly) that there is such a thing as 16bits .jpg, otherwise I cant explain it.

avatar image Eric5h5 · Feb 22, 2011 at 08:00 AM 0
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@rudolfwm: JPG simply does not store data in bits like that. It doesn't even use RGB, instead it stores image data as luma and chroma info, represented with discrete cosine transforms. You can specify lesser or greater amounts of compression, but not bit depth.

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Answer by jonas-echterhoff · Feb 21, 2011 at 07:39 PM

You could use an AssetBundle to download assets exactly as you imported them into Unity. Why do you require your textures to be in 16 bit format?

Edit: AssetBundles are indeed a Pro only feature. But, to save memory, compressed textures are much more useful then 16-bit textures anyways, as they are smaller and natively supported by the GPU. compressed textures can be loaded using WWW.LoadImageIntoTexture!

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avatar image rudolfwm · Feb 22, 2011 at 07:52 AM 0
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Its for the iPhone. I need to save memory. Unfortunately I need to download textures from a website. I can only preprocess them with a .NET tool I build for this purpose.

avatar image rudolfwm · Feb 22, 2011 at 07:57 AM 0
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IS there a way to generate on your own (outside of Unity) assetbundles? (I guess not since its a Pro feature)

avatar image jonas-echterhoff ♦♦ · Feb 22, 2011 at 09:28 AM 0
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I edited my answer with more information based on your comments.

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