[PyOpenGL-Users] Texture Blitting?

[Jasper P. <ja...@pe...>]

I've just recently started to use pygame, and am rendering in OpenGL as that
allows smooth full screen scrolling without blitting, zooming, etc.  However,
I still want to change "texture" surfaces, and thus need to blit to them.
This seems simple enough in concept, once you know about OpenGL's
glTexSubImage2d(), but I'm getting strange behavior...

My texture updates work, except on mipmapped textures -- then they seem to
"blend" with the original surface.  Even weirder, if multiple blits target
the same "texels", only the latest blit is "blended" with the original
image!?  Obviously I'm missing something...

Does anyone know how to make this work correctly with mipmapping?  I tried
changing the "level" argument to glTexSubImage2d(), as it's docs allude
to a connection with mipmapping, but that just crashes.

-Jasper