Re: [PyOpenGL-Users] Suspiciously slow script

[Derakon <de...@gm...>]

Responses inline.

On Sat, May 22, 2010 at 12:04 PM, Mike C. Fletcher
<mcf...@vr...> wrote:
>
> To start debugging:
>
> does disabling OpenGL_accelerate change your performance (on my machine
> there is no difference, which suggests that OpenGL_accelerate isn't likely
> to be your problem)
>
> import OpenGL
> OpenGL.USE_ACCELERATE = False
>

Tried this; no change.

> confirm that your machine is using direct rendering (i.e. actually using
> your hardware driver, not a software renderer)
>
> on Linux:  glxinfo | grep direct
>

No idea how to do this on an OSX box, but given that I'm using a card
that shipped with the box, and that games do work properly, I'd be
extremely surprised if I were using software rendering.

> confirm that non-Python OpenGL programs are *currently* running reasonably
> well on this machine

They are. I've been playing Torchlight all last week; I assume it's
OpenGL because what else would it be on a Mac? DirectX is out of the
question and I'm not aware of any other graphics libraries that would
work.

> confirm that you are not using an OpenGL compositing desktop (e.g. compiz on
> Linux) which may cause indirect rendering of OpenGL windows

Again, not certain how to do this; however, I tested the script in
OSX's built-in X11 system, which (I'm fairly certain) skips most of
the pretty-ifying steps that the window manager normally does, and
it's still slow.

> confirm that you do not have system-level anti-aliasing settings enabled
> (i.e. a 4x or 8x antialiasing specified in ATIs control panel)

No ATI control panel, but again, something like this would affect games.

> try generating mipmaps and using mipmap-nearest (just for kicks)

Okay, I replaced the glTexImage2D in the script with this:

GLU.gluBuild2DMipmaps(GL.GL_TEXTURE_2D, GL.GL_RGBA, surface.get_width(),
        surface.get_height(), GL.GL_RGBA, GL.GL_UNSIGNED_BYTE, textureData)

and replaced the GL_TEXTURE_MIN_FILTER line with this:

GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER,
GL.GL_LINEAR_MIPMAP_LINEAR)

and now I get 333FPS! What the heck?

>
> Realize that isn't all that much help, but this is looking like a
> system/config issue.  Good luck,
> Mike
>
> --
> ________________________________________________
>   Mike C. Fletcher
>   Designer, VR Plumber, Coder
>   http://www.vrplumber.com
>   http://blog.vrplumber.com
>
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