GL_ARB_texture_buffer_range
http://www.opengl.org/registry/specs/ARB/texture_buffer_range.txt
GL_ARB_texture_buffer_range
	GL_TEXTURE_BUFFER_OFFSET 0x919D
	GL_TEXTURE_BUFFER_SIZE 0x919E
	GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT 0x919F
	void glTexBufferRange (GLenum target, GLenum internalformat, GLuint buffer, GLintptr offset, GLsizeiptr size)
	void glTextureBufferRangeEXT (GLuint texture, GLenum target, GLenum internalformat, GLuint buffer, GLintptr offset, GLsizeiptr size)