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Viewing changes to django/contrib/gis/geos/prototypes/topology.py

  • Committer: Bazaar Package Importer
  • Author(s): Chris Lamb
  • Date: 2010-05-21 07:52:55 UTC
  • mfrom: (1.3.6 upstream)
  • mto: This revision was merged to the branch mainline in revision 28.
  • Revision ID: james.westby@ubuntu.com-20100521075255-ii78v1dyfmyu3uzx
Tags: upstream-1.2
Import upstream version 1.2

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django/contrib/gis/geos/prototypes/topology.py
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           'geos_simplify', 'geos_symdifference', 'geos_union', 'geos_relate']
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from ctypes import c_char_p, c_double, c_int
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from django.contrib.gis.geos.libgeos import lgeos, GEOM_PTR, GEOS_PREPARE
 
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from django.contrib.gis.geos.libgeos import GEOM_PTR, GEOS_PREPARE
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from django.contrib.gis.geos.prototypes.errcheck import check_geom, check_string
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from django.contrib.gis.geos.prototypes.geom import geos_char_p
 
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from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
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def topology(func, *args):
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    "For GEOS unary topology functions."
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    return func
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### Topology Routines ###
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geos_boundary = topology(lgeos.GEOSBoundary)
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geos_buffer = topology(lgeos.GEOSBuffer, c_double, c_int)
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geos_centroid = topology(lgeos.GEOSGetCentroid)
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geos_convexhull = topology(lgeos.GEOSConvexHull)
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geos_difference = topology(lgeos.GEOSDifference, GEOM_PTR)
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geos_envelope = topology(lgeos.GEOSEnvelope)
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geos_intersection = topology(lgeos.GEOSIntersection, GEOM_PTR)
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geos_linemerge = topology(lgeos.GEOSLineMerge)
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geos_pointonsurface = topology(lgeos.GEOSPointOnSurface)
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geos_preservesimplify = topology(lgeos.GEOSTopologyPreserveSimplify, c_double)
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geos_simplify = topology(lgeos.GEOSSimplify, c_double)
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geos_symdifference = topology(lgeos.GEOSSymDifference, GEOM_PTR)
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geos_union = topology(lgeos.GEOSUnion, GEOM_PTR)
 
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geos_boundary = topology(GEOSFunc('GEOSBoundary'))
 
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geos_buffer = topology(GEOSFunc('GEOSBuffer'), c_double, c_int)
 
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geos_centroid = topology(GEOSFunc('GEOSGetCentroid'))
 
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geos_convexhull = topology(GEOSFunc('GEOSConvexHull'))
 
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geos_difference = topology(GEOSFunc('GEOSDifference'), GEOM_PTR)
 
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geos_envelope = topology(GEOSFunc('GEOSEnvelope'))
 
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geos_intersection = topology(GEOSFunc('GEOSIntersection'), GEOM_PTR)
 
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geos_linemerge = topology(GEOSFunc('GEOSLineMerge'))
 
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geos_pointonsurface = topology(GEOSFunc('GEOSPointOnSurface'))
 
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geos_preservesimplify = topology(GEOSFunc('GEOSTopologyPreserveSimplify'), c_double)
 
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geos_simplify = topology(GEOSFunc('GEOSSimplify'), c_double)
 
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geos_symdifference = topology(GEOSFunc('GEOSSymDifference'), GEOM_PTR)
 
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geos_union = topology(GEOSFunc('GEOSUnion'), GEOM_PTR)
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# GEOSRelate returns a string, not a geometry.
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geos_relate = lgeos.GEOSRelate
 
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geos_relate = GEOSFunc('GEOSRelate')
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geos_relate.argtypes = [GEOM_PTR, GEOM_PTR]
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geos_relate.restype = geos_char_p
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geos_relate.errcheck = check_string
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# Routines only in GEOS 3.1+
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if GEOS_PREPARE:
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    geos_cascaded_union = lgeos.GEOSUnionCascaded
 
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    geos_cascaded_union = GEOSFunc('GEOSUnionCascaded')
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    geos_cascaded_union.argtypes = [GEOM_PTR]
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    geos_cascaded_union.restype = GEOM_PTR
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    __all__.append('geos_cascaded_union')