Pixel information from a Texture?

OpenGL Development
#1

Is there any way to get the pixel information from a Texture? All I need are the colors. Currently I’m storing both a BufferedImage and an OpenGL Texture just to access pixel information, which is obviously wasteful if there’s another way to do it.

Thanks.

#2

While I’m here it would actually be useful to be able to directly edit the pixel information in a texture as well. Currently I’m editing the buffered image and then creating a new texture.

#3

You should be able to use glGetTexImage() to get the pixels from a texture. I’ve never used that myself, though. Personally I would keep BufferedImage in memory as well for modifications, unless memory usage is the problem. To upload changes back to the texture, use glTexSubImage2D() instead of recreating the whole texture. :slight_smile:

#4

Cool, I’ll try those out!