Thread: a question on textures

I have always been under the impression that in OpenGL textures must have dimensions that are a power of 2. I have always used textures conforming to that rule.

Today I threw in a texture with dimensions 384x256. Although 256 is a power of 2, 384 is definitely not. The texture worked, surprisingly, because I didn't expect it to even show up. When I used it on several surfaces, however, it slowed my system to a crawl.

So anyways...why did the texture work in the first place? I thought only dimensions that are powers of 2 are allowed in OpenGL.

According to OpenGL 2.1:

Originally Posted by http://www.opengl.org/documentation/current_version/

Non-Power-Of-Two Textures

* The restriction of textures to power-of-two dimensions has been relaxed for all texture targets, so that non-power-of-two textures may be specified without generating errors. Non-power-of-two textures was promoted from the ARB texture non power of two extension.