Does anyone know if glCopyTexSubImage2D() is reasonable well supported on modern CPU's (what is a minimum requirement for it to be hardware accelerated?), and what kind of speed it can achieve? I don't want to resort to using extensions, just standard GL 1.2.
Any info appreciated.
i found a ppt from the developers conference saying if you are ever going to use a texture copying routine, that's the one to use. It was from 2001 so i think you're safe plus..you don't have much of another choice do you?
Yah. I guess it'll be okay. I'll only be copying the alpha channel into a GL_ALPHA texture so it should be okay.