GL_EXT_texture_buffer_object
http://developer.download.nvidia.com/opengl/specs/GL_EXT_texture_buffer_object.txt
	GL_TEXTURE_BUFFER_EXT 0x8C2A
	GL_MAX_TEXTURE_BUFFER_SIZE_EXT 0x8C2B
	GL_TEXTURE_BINDING_BUFFER_EXT 0x8C2C
	GL_TEXTURE_BUFFER_DATA_STORE_BINDING_EXT 0x8C2D
	GL_TEXTURE_BUFFER_FORMAT_EXT 0x8C2E
	void glTexBufferEXT (GLenum target, GLenum internalformat, GLuint buffer)