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  Get texture Data from LWJGL Given a Texture Id?  (Read 7000 times)
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Offline wessles
« Posted 2013-10-09 23:10:35 »

So, in my texture class, I want to be able to get a buffered image (or any kind of image data) from lwjgl based off of a texture id. Is there a way to do that?
Offline Cero
« Reply #1 - Posted 2013-10-09 23:19:22 »

you do use the search function of this board, right ?

Offline Agro
« Reply #2 - Posted 2013-10-09 23:54:34 »

Shouldn't you have the image data in the first place if you even have an ID for it?

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« Reply #3 - Posted 2013-10-10 00:19:14 »

You'd have to read from the texture's buffer, then decode that into a bufferedimage.

I won't go into detail because a) I don't know the exact API calls (if they exist); and b) Agro is right; why do you even need to do this? You should think about how you are going about this problem, and just do things the sensible way.

Offline davedes
« Reply #4 - Posted 2013-10-10 01:41:21 »

Very easy to find this through a google search.

There are realistically very few instances where this is a good approach. If you need to modify something per-pixel, and you can't use a shader, then just store the image in RAM after you decode it (either through ImageIO, PNGDecoder, etc).

It's really slow to grab pixels from a texture, and not supported in GL ES (mobile/web).

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