1
GL_ARB_pixel_buffer_object
2
http://oss.sgi.com/projects/ogl-sample/registry/ARB/pixel_buffer_object.txt
3
GL_PIXEL_PACK_BUFFER_ARB 0x88EB
4
GL_PIXEL_UNPACK_BUFFER_ARB 0x88EC
5
GL_PIXEL_PACK_BUFFER_BINDING_ARB 0x88ED
6
GL_PIXEL_UNPACK_BUFFER_BINDING_ARB 0x88EF