from kivy.graphics.cgl cimport GLuint cdef struct vertex_t: float x, y float s0, t0 ctypedef struct vertex_attr_t: char *name unsigned int index unsigned int size GLuint type unsigned int bytesize int per_vertex cdef class VertexFormat: cdef vertex_attr_t *vattr cdef long vattr_count cdef unsigned int vsize cdef unsigned int vbytesize cdef object last_shader