GL_ARB_vertex_attrib_64bit
http://www.opengl.org/registry/specs/ARB/vertex_attrib_64bit.txt
GL_ARB_vertex_attrib_64bit
	GL_DOUBLE_MAT2 0x8F46
	GL_DOUBLE_MAT3 0x8F47
	GL_DOUBLE_MAT4 0x8F48
	GL_DOUBLE_VEC2 0x8FFC
	GL_DOUBLE_VEC3 0x8FFD
	GL_DOUBLE_VEC4 0x8FFE
	void glGetVertexAttribLdv (GLuint index, GLenum pname, GLdouble* params)
	void glVertexAttribL1d (GLuint index, GLdouble x)
	void glVertexAttribL1dv (GLuint index, const GLdouble* v)
	void glVertexAttribL2d (GLuint index, GLdouble x, GLdouble y)
	void glVertexAttribL2dv (GLuint index, const GLdouble* v)
	void glVertexAttribL3d (GLuint index, GLdouble x, GLdouble y, GLdouble z)
	void glVertexAttribL3dv (GLuint index, const GLdouble* v)
	void glVertexAttribL4d (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w)
	void glVertexAttribL4dv (GLuint index, const GLdouble* v)
	void glVertexAttribLPointer (GLuint index, GLint size, GLenum type, GLsizei stride, const void* pointer)