WARNING! An extremely advanced question

OpenGL OpenGL: Advanced Coding
1

What could be the reason that when enabling 2d texture for tmu0, the rendering becomes very slow, obviously in software?

ATI Radeon X1600 with latest drivers.

How can I debug the program?

Thanks!

2

Pardon my ignorance - what is tmu0?

Are you using a shader? What is the format of the texture?

3

One would think that after 171 posts people should know the basics.

4

Maybe he is speaking about TrackMania United or in my opinion, about the Texture Mapping Unit 0.

5

Sorry…found it! i forgot that my textures are non power of 2.

6

TMU is Texture Mapping Unit, from the day of 3Dfx Glide.

7

you’re trying to use glide with a radeon?
how quaint.
but remember, this is an opengl forum.

8

The OpenGL answer:

Radeon X1600 can not sample from NPOT textures if any of the following are true:

a) mipmapped
b) repeat or mirror wrap mode
c) 3D or CUBE target

in other words, it only supports the RECT subset of NPOT.