if (!NamedBufferPageCommitment) NamedBufferPageCommitment = (PFNGLNAMEDBUFFERPAGECOMMITMENTPROC_MT)cmgr->getProcAddress("glNamedBufferPageCommitmentARB");
if (!TexPageCommitment) TexPageCommitment = (PFNGLTEXPAGECOMMITMENTPROC_MT)cmgr->getProcAddress("glTexPageCommitmentARB");
if (!NamedBufferPageCommitment) NamedBufferPageCommitment = (PFNGLNAMEDBUFFERPAGECOMMITMENTPROC_MT)cmgr->getProcAddress("glNamedBufferPageCommitmentARB");
if (!TexPageCommitment) TexPageCommitment = (PFNGLTEXPAGECOMMITMENTPROC_MT)cmgr->getProcAddress("glTexPageCommitmentARB");