Django-1.2.1/build/lib.linux-i686-2.6/django/contrib/gis/geos/prototypes/prepared.py

   1 from ctypes import c_char
   2 from django.contrib.gis.geos.libgeos import GEOM_PTR, PREPGEOM_PTR
   3 from django.contrib.gis.geos.prototypes.errcheck import check_predicate
   4 from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
   5
   6 # Prepared geometry constructor and destructors.
   7 geos_prepare = GEOSFunc('GEOSPrepare')
   8 geos_prepare.argtypes = [GEOM_PTR]
   9 geos_prepare.restype = PREPGEOM_PTR
  10
  11 prepared_destroy = GEOSFunc('GEOSPreparedGeom_destroy')
  12 prepared_destroy.argtpes = [PREPGEOM_PTR]
  13 prepared_destroy.restype = None
  14
  15 # Prepared geometry binary predicate support.
  16 def prepared_predicate(func):
  17     func.argtypes= [PREPGEOM_PTR, GEOM_PTR]
  18     func.restype = c_char
  19     func.errcheck = check_predicate
  20     return func
  21
  22 prepared_contains = prepared_predicate(GEOSFunc('GEOSPreparedContains'))
  23 prepared_contains_properly = prepared_predicate(GEOSFunc('GEOSPreparedContainsProperly'))
  24 prepared_covers = prepared_predicate(GEOSFunc('GEOSPreparedCovers'))
  25 prepared_intersects = prepared_predicate(GEOSFunc('GEOSPreparedIntersects'))