Multiple Sources

glGenTexturesEXT( n, texlist ) glBindTextureEXT( texlist[i] ) glTexImage[n]D[EXT]( GLenum target, GLint level, GLint components/internalFormat, GLsizei w, [h, [d,]] GLint border, GLenum format, type, void *data );	glBindTextureEXT( texlist[i] ) glTexSubImage[n]DEXT( GLenum target, GLint level, GLint xoffset, [yoffset, [zoffset,]] GLsizei w, [h, [d,]] GLenum format, type, void * data );
glXMakeCurrentReadSGI( Display *dpy, GLXDrawable draw, read, GLXContext gc ); glCopyTexImage2DEXT( GLenum target, GLint level, GLenum internalFormat, GLint x, y, w, h, GLint border );	glXMakeCurrentReadSGI( Display *dpy, GLXDrawable draw, read, GLXContext gc ); glCopyTexSubImage2DEXT( GLenum target, GLint level, GLint xoffset, yoffset, GLint x, y, w, h );