Cleanup more ctypes bindings.

__init__.py

@@ -101,10 +101,6 @@ def _ushortp(x):
     assert x.typecode == 'H'
     return x.buffer_info()[0]
 
-def _uintp(x):
-    assert x.typecode == 'I'
-    return x.buffer_info()[0]
-
 def _floatp(x):
     assert x.typecode == 'f'
     return x.buffer_info()[0]
@@ -287,19 +283,14 @@ select_vertices = _lib.rk_select_vertices
 select_vertices.argtypes = (
     ctypes.c_void_p,) # vertices
 
-_draw_batch = _lib.rk_draw_batch
-_draw_batch.argtypes = (
+draw_batch = _lib.rk_draw_batch
+draw_batch.argtypes = (
     ctypes.c_void_p, # batch
     ctypes.c_uint, # size
-    ctypes.c_void_p, # flags
-    ctypes.c_void_p, # meshes
+    ctypes.POINTER(ctypes.c_ubyte), # flags
+    ctypes.POINTER(ctypes.c_uint), # meshes
     ctypes.c_void_p) # params
 
-def draw_batch(batch, flags, meshes, params):
-    size = len(flags)
-    assert len(meshes) == size
-    _draw_batch(batch, size, _ubytep(flags), _uintp(meshes), params)
-
 unselect_vertices = _lib.rk_unselect_vertices
 unselect_vertices.argtypes = (
     ctypes.c_void_p,) # vertices