Texturing - subtexture

subtexture

Effective support of image size NON-power of 2 :
Faster Download Performances
Use for Video-Mapping, in conjunction with glXMakeCurrentReadSGI() :

" If GL_INTERLACE_SGIX is enabled, a complete video frame may be assembled in texture memory by invoking glTexSubImage2DEXT() on two consecutive video fields, with yoffset values that differ by one" from glTexSubImage2DEXT() man page
NB:
right-side of the subtexture must fall on a 32-pixels boundary