Lazy loading of GEOS functions
This commit is contained in:
Claude Paroz
parent
143255c8bb
commit
61d09e61f5
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@ -1,8 +1,7 @@
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from django.contrib.gis.db.backends.base.features import BaseSpatialFeatures
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from django.contrib.gis.geos import geos_version
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from django.contrib.gis.geos import geos_version_info
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from django.db.backends.sqlite3.features import \
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DatabaseFeatures as SQLiteDatabaseFeatures
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from django.utils.encoding import force_text
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from django.utils.functional import cached_property
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@ -20,4 +19,4 @@ class DatabaseFeatures(BaseSpatialFeatures, SQLiteDatabaseFeatures):
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@cached_property
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def supports_3d_storage(self):
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return force_text(geos_version()) >= '3.3'
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return geos_version_info()['version'] >= '3.3'
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@ -14,9 +14,12 @@ from ctypes.util import find_library
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from django.contrib.gis.geos.error import GEOSException
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from django.core.exceptions import ImproperlyConfigured
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from django.utils.functional import SimpleLazyObject
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logger = logging.getLogger('django.contrib.gis')
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def load_geos():
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# Custom library path set?
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try:
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from django.conf import settings
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@ -53,12 +56,19 @@ if lib_path is None:
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'Try setting GEOS_LIBRARY_PATH in your settings.' %
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'", "'.join(lib_names)
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)
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# Getting the GEOS C library. The C interface (CDLL) is used for
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# both *NIX and Windows.
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# See the GEOS C API source code for more details on the library function calls:
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# http://geos.refractions.net/ro/doxygen_docs/html/geos__c_8h-source.html
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lgeos = CDLL(lib_path)
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_lgeos = CDLL(lib_path)
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# Here we set up the prototypes for the initGEOS_r and finishGEOS_r
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# routines. These functions aren't actually called until they are
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# attached to a GEOS context handle -- this actually occurs in
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# geos/prototypes/threadsafe.py.
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_lgeos.initGEOS_r.restype = CONTEXT_PTR
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_lgeos.finishGEOS_r.argtypes = [CONTEXT_PTR]
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return _lgeos
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# The notice and error handler C function callback definitions.
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# Supposed to mimic the GEOS message handler (C below):
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@ -120,11 +130,42 @@ def get_pointer_arr(n):
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GeomArr = GEOM_PTR * n
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return GeomArr()
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lgeos = SimpleLazyObject(load_geos)
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class GEOSFuncFactory(object):
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argtypes = None
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restype = None
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errcheck = None
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def __init__(self, func_name, *args, **kwargs):
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self.func_name = func_name
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self.restype = kwargs.pop('restype', self.restype)
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self.errcheck = kwargs.pop('errcheck', self.errcheck)
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self.argtypes = kwargs.pop('argtypes', self.argtypes)
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self.args = args
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self.kwargs = kwargs
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self.func = None
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def __call__(self, *args, **kwargs):
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if self.func is None:
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self.func = self.get_func(*self.args, **self.kwargs)
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return self.func(*args, **kwargs)
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def get_func(self, *args, **kwargs):
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from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
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func = GEOSFunc(self.func_name)
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func.argtypes = self.argtypes or []
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func.restype = self.restype
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if self.errcheck:
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func.errcheck = self.errcheck
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return func
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# Returns the string version of the GEOS library. Have to set the restype
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# explicitly to c_char_p to ensure compatibility across 32 and 64-bit platforms.
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geos_version = lgeos.GEOSversion
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geos_version.argtypes = None
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geos_version.restype = c_char_p
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geos_version = GEOSFuncFactory('GEOSversion', restype=c_char_p)
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# Regular expression should be able to parse version strings such as
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# '3.0.0rc4-CAPI-1.3.3', '3.0.0-CAPI-1.4.1', '3.4.0dev-CAPI-1.8.0' or '3.4.0dev-CAPI-1.8.0 r0'
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@ -147,18 +188,3 @@ def geos_version_info():
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raise GEOSException('Could not parse version info string "%s"' % ver)
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return {key: m.group(key) for key in (
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'version', 'release_candidate', 'capi_version', 'major', 'minor', 'subminor')}
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# Version numbers and whether or not prepared geometry support is available.
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_verinfo = geos_version_info()
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GEOS_MAJOR_VERSION = int(_verinfo['major'])
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GEOS_MINOR_VERSION = int(_verinfo['minor'])
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GEOS_SUBMINOR_VERSION = int(_verinfo['subminor'])
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del _verinfo
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GEOS_VERSION = (GEOS_MAJOR_VERSION, GEOS_MINOR_VERSION, GEOS_SUBMINOR_VERSION)
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# Here we set up the prototypes for the initGEOS_r and finishGEOS_r
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# routines. These functions aren't actually called until they are
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# attached to a GEOS context handle -- this actually occurs in
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# geos/prototypes/threadsafe.py.
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lgeos.initGEOS_r.restype = CONTEXT_PTR
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lgeos.finishGEOS_r.argtypes = [CONTEXT_PTR]
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@ -1,23 +1,12 @@
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from ctypes import POINTER, c_double, c_int, c_uint
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from django.contrib.gis.geos.libgeos import CS_PTR, GEOM_PTR
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from django.contrib.gis.geos.libgeos import CS_PTR, GEOM_PTR, GEOSFuncFactory
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from django.contrib.gis.geos.prototypes.errcheck import (
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GEOSException, last_arg_byref,
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)
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from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
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# ## Error-checking routines specific to coordinate sequences. ##
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def check_cs_ptr(result, func, cargs):
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"Error checking on routines that return Geometries."
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if not result:
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raise GEOSException(
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'Error encountered checking Coordinate Sequence returned from GEOS '
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'C function "%s".' % func.__name__
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)
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return result
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def check_cs_op(result, func, cargs):
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"Checks the status code of a coordinate sequence operation."
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if result == 0:
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@ -33,63 +22,73 @@ def check_cs_get(result, func, cargs):
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return last_arg_byref(cargs)
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# ## Coordinate sequence prototype generation functions. ##
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def cs_int(func):
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# ## Coordinate sequence prototype factory classes. ##
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class CsInt(GEOSFuncFactory):
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"For coordinate sequence routines that return an integer."
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func.argtypes = [CS_PTR, POINTER(c_uint)]
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func.restype = c_int
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func.errcheck = check_cs_get
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return func
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argtypes = [CS_PTR, POINTER(c_uint)]
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restype = c_int
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errcheck = staticmethod(check_cs_get)
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def cs_operation(func, ordinate=False, get=False):
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class CsOperation(GEOSFuncFactory):
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"For coordinate sequence operations."
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restype = c_int
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def get_func(self, ordinate=False, get=False):
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if get:
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# Get routines get double parameter passed-in by reference.
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func.errcheck = check_cs_get
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# Get routines have double parameter passed-in by reference.
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self.errcheck = check_cs_get
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dbl_param = POINTER(c_double)
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else:
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func.errcheck = check_cs_op
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self.errcheck = check_cs_op
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dbl_param = c_double
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if ordinate:
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# Get/Set ordinate routines have an extra uint parameter.
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func.argtypes = [CS_PTR, c_uint, c_uint, dbl_param]
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self.argtypes = [CS_PTR, c_uint, c_uint, dbl_param]
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else:
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func.argtypes = [CS_PTR, c_uint, dbl_param]
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func.restype = c_int
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return func
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self.argtypes = [CS_PTR, c_uint, dbl_param]
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return super(CsOperation, self).get_func()
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def cs_output(func, argtypes):
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"For routines that return a coordinate sequence."
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func.argtypes = argtypes
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func.restype = CS_PTR
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func.errcheck = check_cs_ptr
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return func
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class CsOutput(GEOSFuncFactory):
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restype = CS_PTR
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def get_func(self, argtypes):
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self.argtypes = argtypes
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return super(CsOutput, self).get_func()
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@staticmethod
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def errcheck(result, func, cargs):
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if not result:
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raise GEOSException(
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'Error encountered checking Coordinate Sequence returned from GEOS '
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'C function "%s".' % func.__name__
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)
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return result
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# ## Coordinate Sequence ctypes prototypes ##
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# Coordinate Sequence constructors & cloning.
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cs_clone = cs_output(GEOSFunc('GEOSCoordSeq_clone'), [CS_PTR])
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create_cs = cs_output(GEOSFunc('GEOSCoordSeq_create'), [c_uint, c_uint])
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get_cs = cs_output(GEOSFunc('GEOSGeom_getCoordSeq'), [GEOM_PTR])
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cs_clone = CsOutput('GEOSCoordSeq_clone', [CS_PTR])
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create_cs = CsOutput('GEOSCoordSeq_create', [c_uint, c_uint])
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get_cs = CsOutput('GEOSGeom_getCoordSeq', [GEOM_PTR])
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# Getting, setting ordinate
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cs_getordinate = cs_operation(GEOSFunc('GEOSCoordSeq_getOrdinate'), ordinate=True, get=True)
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cs_setordinate = cs_operation(GEOSFunc('GEOSCoordSeq_setOrdinate'), ordinate=True)
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cs_getordinate = CsOperation('GEOSCoordSeq_getOrdinate', ordinate=True, get=True)
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cs_setordinate = CsOperation('GEOSCoordSeq_setOrdinate', ordinate=True)
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# For getting, x, y, z
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cs_getx = cs_operation(GEOSFunc('GEOSCoordSeq_getX'), get=True)
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cs_gety = cs_operation(GEOSFunc('GEOSCoordSeq_getY'), get=True)
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cs_getz = cs_operation(GEOSFunc('GEOSCoordSeq_getZ'), get=True)
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cs_getx = CsOperation('GEOSCoordSeq_getX', get=True)
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cs_gety = CsOperation('GEOSCoordSeq_getY', get=True)
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cs_getz = CsOperation('GEOSCoordSeq_getZ', get=True)
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# For setting, x, y, z
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cs_setx = cs_operation(GEOSFunc('GEOSCoordSeq_setX'))
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cs_sety = cs_operation(GEOSFunc('GEOSCoordSeq_setY'))
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cs_setz = cs_operation(GEOSFunc('GEOSCoordSeq_setZ'))
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cs_setx = CsOperation('GEOSCoordSeq_setX')
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cs_sety = CsOperation('GEOSCoordSeq_setY')
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cs_setz = CsOperation('GEOSCoordSeq_setZ')
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# These routines return size & dimensions.
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cs_getsize = cs_int(GEOSFunc('GEOSCoordSeq_getSize'))
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cs_getdims = cs_int(GEOSFunc('GEOSCoordSeq_getDimensions'))
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cs_getsize = CsInt('GEOSCoordSeq_getSize')
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cs_getdims = CsInt('GEOSCoordSeq_getDimensions')
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@ -4,13 +4,12 @@
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from ctypes import c_void_p, string_at
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from django.contrib.gis.geos.error import GEOSException
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from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
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from django.contrib.gis.geos.libgeos import GEOSFuncFactory
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# Getting the `free` routine used to free the memory allocated for
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# string pointers returned by GEOS.
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free = GEOSFunc('GEOSFree')
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free = GEOSFuncFactory('GEOSFree')
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free.argtypes = [c_void_p]
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free.restype = None
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def last_arg_byref(args):
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@ -1,10 +1,9 @@
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from ctypes import POINTER, c_char_p, c_int, c_size_t, c_ubyte
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from django.contrib.gis.geos.libgeos import CS_PTR, GEOM_PTR
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from django.contrib.gis.geos.libgeos import CS_PTR, GEOM_PTR, GEOSFuncFactory
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from django.contrib.gis.geos.prototypes.errcheck import (
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check_geom, check_minus_one, check_sized_string, check_string, check_zero,
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)
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from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
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# This is the return type used by binary output (WKB, HEX) routines.
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c_uchar_p = POINTER(c_ubyte)
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@ -21,109 +20,96 @@ class geos_char_p(c_char_p):
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pass
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# ### ctypes generation functions ###
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def bin_constructor(func):
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# ### ctypes factory classes ###
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class BinConstructor(GEOSFuncFactory):
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"Generates a prototype for binary construction (HEX, WKB) GEOS routines."
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func.argtypes = [c_char_p, c_size_t]
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func.restype = GEOM_PTR
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func.errcheck = check_geom
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return func
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argtypes = [c_char_p, c_size_t]
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restype = GEOM_PTR
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errcheck = staticmethod(check_geom)
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# HEX & WKB output
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def bin_output(func):
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class BinOutput(GEOSFuncFactory):
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"Generates a prototype for the routines that return a sized string."
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func.argtypes = [GEOM_PTR, POINTER(c_size_t)]
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func.errcheck = check_sized_string
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func.restype = c_uchar_p
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return func
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argtypes = [GEOM_PTR, POINTER(c_size_t)]
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restype = c_uchar_p
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errcheck = staticmethod(check_sized_string)
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def geom_output(func, argtypes):
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class GeomOutput(GEOSFuncFactory):
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"For GEOS routines that return a geometry."
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if argtypes:
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func.argtypes = argtypes
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func.restype = GEOM_PTR
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func.errcheck = check_geom
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return func
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restype = GEOM_PTR
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errcheck = staticmethod(check_geom)
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def get_func(self, argtypes):
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self.argtypes = argtypes
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return super(GeomOutput, self).get_func()
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def geom_index(func):
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"For GEOS routines that return geometries from an index."
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return geom_output(func, [GEOM_PTR, c_int])
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def int_from_geom(func, zero=False):
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class IntFromGeom(GEOSFuncFactory):
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"Argument is a geometry, return type is an integer."
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func.argtypes = [GEOM_PTR]
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func.restype = c_int
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argtypes = [GEOM_PTR]
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restype = c_int
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def get_func(self, zero=False):
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if zero:
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func.errcheck = check_zero
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self.errcheck = check_zero
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else:
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func.errcheck = check_minus_one
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return func
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self.errcheck = check_minus_one
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return super(IntFromGeom, self).get_func()
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def string_from_geom(func):
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class StringFromGeom(GEOSFuncFactory):
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"Argument is a Geometry, return type is a string."
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func.argtypes = [GEOM_PTR]
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func.restype = geos_char_p
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func.errcheck = check_string
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return func
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argtypes = [GEOM_PTR]
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restype = geos_char_p
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errcheck = staticmethod(check_string)
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# ### ctypes prototypes ###
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# Deprecated creation routines from WKB, HEX, WKT
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from_hex = bin_constructor(GEOSFunc('GEOSGeomFromHEX_buf'))
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from_wkb = bin_constructor(GEOSFunc('GEOSGeomFromWKB_buf'))
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from_wkt = geom_output(GEOSFunc('GEOSGeomFromWKT'), [c_char_p])
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from_hex = BinConstructor('GEOSGeomFromHEX_buf')
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from_wkb = BinConstructor('GEOSGeomFromWKB_buf')
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from_wkt = GeomOutput('GEOSGeomFromWKT', [c_char_p])
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# Deprecated output routines
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to_hex = bin_output(GEOSFunc('GEOSGeomToHEX_buf'))
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to_wkb = bin_output(GEOSFunc('GEOSGeomToWKB_buf'))
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to_wkt = string_from_geom(GEOSFunc('GEOSGeomToWKT'))
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to_hex = BinOutput('GEOSGeomToHEX_buf')
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to_wkb = BinOutput('GEOSGeomToWKB_buf')
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to_wkt = StringFromGeom('GEOSGeomToWKT')
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# The GEOS geometry type, typeid, num_coordites and number of geometries
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geos_normalize = int_from_geom(GEOSFunc('GEOSNormalize'))
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geos_type = string_from_geom(GEOSFunc('GEOSGeomType'))
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geos_typeid = int_from_geom(GEOSFunc('GEOSGeomTypeId'))
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get_dims = int_from_geom(GEOSFunc('GEOSGeom_getDimensions'), zero=True)
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get_num_coords = int_from_geom(GEOSFunc('GEOSGetNumCoordinates'))
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get_num_geoms = int_from_geom(GEOSFunc('GEOSGetNumGeometries'))
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geos_normalize = IntFromGeom('GEOSNormalize')
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geos_type = StringFromGeom('GEOSGeomType')
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geos_typeid = IntFromGeom('GEOSGeomTypeId')
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get_dims = IntFromGeom('GEOSGeom_getDimensions', zero=True)
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get_num_coords = IntFromGeom('GEOSGetNumCoordinates')
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get_num_geoms = IntFromGeom('GEOSGetNumGeometries')
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# Geometry creation factories
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create_point = geom_output(GEOSFunc('GEOSGeom_createPoint'), [CS_PTR])
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create_linestring = geom_output(GEOSFunc('GEOSGeom_createLineString'), [CS_PTR])
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create_linearring = geom_output(GEOSFunc('GEOSGeom_createLinearRing'), [CS_PTR])
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create_point = GeomOutput('GEOSGeom_createPoint', [CS_PTR])
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create_linestring = GeomOutput('GEOSGeom_createLineString', [CS_PTR])
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create_linearring = GeomOutput('GEOSGeom_createLinearRing', [CS_PTR])
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# Polygon and collection creation routines are special and will not
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# have their argument types defined.
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create_polygon = geom_output(GEOSFunc('GEOSGeom_createPolygon'), None)
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create_collection = geom_output(GEOSFunc('GEOSGeom_createCollection'), None)
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create_polygon = GeomOutput('GEOSGeom_createPolygon', None)
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create_collection = GeomOutput('GEOSGeom_createCollection', None)
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# Ring routines
|
||||
get_extring = geom_output(GEOSFunc('GEOSGetExteriorRing'), [GEOM_PTR])
|
||||
get_intring = geom_index(GEOSFunc('GEOSGetInteriorRingN'))
|
||||
get_nrings = int_from_geom(GEOSFunc('GEOSGetNumInteriorRings'))
|
||||
get_extring = GeomOutput('GEOSGetExteriorRing', [GEOM_PTR])
|
||||
get_intring = GeomOutput('GEOSGetInteriorRingN', [GEOM_PTR, c_int])
|
||||
get_nrings = IntFromGeom('GEOSGetNumInteriorRings')
|
||||
|
||||
# Collection Routines
|
||||
get_geomn = geom_index(GEOSFunc('GEOSGetGeometryN'))
|
||||
get_geomn = GeomOutput('GEOSGetGeometryN', [GEOM_PTR, c_int])
|
||||
|
||||
# Cloning
|
||||
geom_clone = GEOSFunc('GEOSGeom_clone')
|
||||
geom_clone.argtypes = [GEOM_PTR]
|
||||
geom_clone.restype = GEOM_PTR
|
||||
geom_clone = GEOSFuncFactory('GEOSGeom_clone', argtypes=[GEOM_PTR], restype=GEOM_PTR)
|
||||
|
||||
# Destruction routine.
|
||||
destroy_geom = GEOSFunc('GEOSGeom_destroy')
|
||||
destroy_geom.argtypes = [GEOM_PTR]
|
||||
destroy_geom.restype = None
|
||||
destroy_geom = GEOSFuncFactory('GEOSGeom_destroy', argtypes=[GEOM_PTR])
|
||||
|
||||
# SRID routines
|
||||
geos_get_srid = GEOSFunc('GEOSGetSRID')
|
||||
geos_get_srid.argtypes = [GEOM_PTR]
|
||||
geos_get_srid.restype = c_int
|
||||
|
||||
geos_set_srid = GEOSFunc('GEOSSetSRID')
|
||||
geos_set_srid.argtypes = [GEOM_PTR, c_int]
|
||||
geos_set_srid.restype = None
|
||||
geos_get_srid = GEOSFuncFactory('GEOSGetSRID', argtypes=[GEOM_PTR], restype=c_int)
|
||||
geos_set_srid = GEOSFuncFactory('GEOSSetSRID', argtypes=[GEOM_PTR, c_int])
|
||||
|
|
|
|||
|
|
@ -2,12 +2,11 @@ import threading
|
|||
from ctypes import POINTER, Structure, byref, c_char, c_char_p, c_int, c_size_t
|
||||
|
||||
from django.contrib.gis.geos.base import GEOSBase
|
||||
from django.contrib.gis.geos.libgeos import GEOM_PTR
|
||||
from django.contrib.gis.geos.libgeos import GEOM_PTR, GEOSFuncFactory
|
||||
from django.contrib.gis.geos.prototypes.errcheck import (
|
||||
check_geom, check_sized_string, check_string,
|
||||
)
|
||||
from django.contrib.gis.geos.prototypes.geom import c_uchar_p, geos_char_p
|
||||
from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
|
||||
from django.utils import six
|
||||
from django.utils.encoding import force_bytes
|
||||
|
||||
|
|
@ -34,99 +33,90 @@ WKB_READ_PTR = POINTER(WKBReader_st)
|
|||
WKB_WRITE_PTR = POINTER(WKBReader_st)
|
||||
|
||||
# WKTReader routines
|
||||
wkt_reader_create = GEOSFunc('GEOSWKTReader_create')
|
||||
wkt_reader_create.restype = WKT_READ_PTR
|
||||
|
||||
wkt_reader_destroy = GEOSFunc('GEOSWKTReader_destroy')
|
||||
wkt_reader_destroy.argtypes = [WKT_READ_PTR]
|
||||
|
||||
wkt_reader_read = GEOSFunc('GEOSWKTReader_read')
|
||||
wkt_reader_read.argtypes = [WKT_READ_PTR, c_char_p]
|
||||
wkt_reader_read.restype = GEOM_PTR
|
||||
wkt_reader_read.errcheck = check_geom
|
||||
wkt_reader_create = GEOSFuncFactory('GEOSWKTReader_create', restype=WKT_READ_PTR)
|
||||
wkt_reader_destroy = GEOSFuncFactory('GEOSWKTReader_destroy', argtypes=[WKT_READ_PTR])
|
||||
|
||||
wkt_reader_read = GEOSFuncFactory(
|
||||
'GEOSWKTReader_read', argtypes=[WKT_READ_PTR, c_char_p], restype=GEOM_PTR, errcheck=check_geom
|
||||
)
|
||||
# WKTWriter routines
|
||||
wkt_writer_create = GEOSFunc('GEOSWKTWriter_create')
|
||||
wkt_writer_create.restype = WKT_WRITE_PTR
|
||||
wkt_writer_create = GEOSFuncFactory('GEOSWKTWriter_create', restype=WKT_WRITE_PTR)
|
||||
wkt_writer_destroy = GEOSFuncFactory('GEOSWKTWriter_destroy', argtypes=[WKT_WRITE_PTR])
|
||||
|
||||
wkt_writer_destroy = GEOSFunc('GEOSWKTWriter_destroy')
|
||||
wkt_writer_destroy.argtypes = [WKT_WRITE_PTR]
|
||||
wkt_writer_write = GEOSFuncFactory(
|
||||
'GEOSWKTWriter_write', argtypes=[WKT_WRITE_PTR, GEOM_PTR], restype=geos_char_p, errcheck=check_string
|
||||
)
|
||||
|
||||
wkt_writer_write = GEOSFunc('GEOSWKTWriter_write')
|
||||
wkt_writer_write.argtypes = [WKT_WRITE_PTR, GEOM_PTR]
|
||||
wkt_writer_write.restype = geos_char_p
|
||||
wkt_writer_write.errcheck = check_string
|
||||
|
||||
class WKTOutputDim(GEOSFuncFactory):
|
||||
def get_func(self, *args, **kwargs):
|
||||
try:
|
||||
wkt_writer_get_outdim = GEOSFunc('GEOSWKTWriter_getOutputDimension')
|
||||
wkt_writer_get_outdim.argtypes = [WKT_WRITE_PTR]
|
||||
wkt_writer_get_outdim.restype = c_int
|
||||
wkt_writer_set_outdim = GEOSFunc('GEOSWKTWriter_setOutputDimension')
|
||||
wkt_writer_set_outdim.argtypes = [WKT_WRITE_PTR, c_int]
|
||||
return super(WKTOutputDim, self).get_func(*args, **kwargs)
|
||||
except AttributeError:
|
||||
# GEOSWKTWriter_get/setOutputDimension has been introduced in GEOS 3.3.0
|
||||
# Always return 2 if not available
|
||||
wkt_writer_get_outdim = lambda ptr: 2
|
||||
wkt_writer_set_outdim = lambda ptr, dim: None
|
||||
return {
|
||||
'GEOSWKTWriter_getOutputDimension': lambda ptr: 2,
|
||||
'GEOSWKTWriter_setOutputDimension': lambda ptr, dim: None,
|
||||
}.get(self.func_name)
|
||||
|
||||
wkt_writer_get_outdim = WKTOutputDim(
|
||||
'GEOSWKTWriter_getOutputDimension', argtypes=[WKT_WRITE_PTR], restype=c_int
|
||||
)
|
||||
wkt_writer_set_outdim = WKTOutputDim(
|
||||
'GEOSWKTWriter_setOutputDimension', argtypes=[WKT_WRITE_PTR, c_int]
|
||||
)
|
||||
|
||||
# WKBReader routines
|
||||
wkb_reader_create = GEOSFunc('GEOSWKBReader_create')
|
||||
wkb_reader_create.restype = WKB_READ_PTR
|
||||
|
||||
wkb_reader_destroy = GEOSFunc('GEOSWKBReader_destroy')
|
||||
wkb_reader_destroy.argtypes = [WKB_READ_PTR]
|
||||
wkb_reader_create = GEOSFuncFactory('GEOSWKBReader_create', restype=WKB_READ_PTR)
|
||||
wkb_reader_destroy = GEOSFuncFactory('GEOSWKBReader_destroy', argtypes=[WKB_READ_PTR])
|
||||
|
||||
|
||||
def wkb_read_func(func):
|
||||
class WKBReadFunc(GEOSFuncFactory):
|
||||
# Although the function definitions take `const unsigned char *`
|
||||
# as their parameter, we use c_char_p here so the function may
|
||||
# take Python strings directly as parameters. Inside Python there
|
||||
# is not a difference between signed and unsigned characters, so
|
||||
# it is not a problem.
|
||||
func.argtypes = [WKB_READ_PTR, c_char_p, c_size_t]
|
||||
func.restype = GEOM_PTR
|
||||
func.errcheck = check_geom
|
||||
return func
|
||||
argtypes = [WKB_READ_PTR, c_char_p, c_size_t]
|
||||
restype = GEOM_PTR
|
||||
errcheck = staticmethod(check_geom)
|
||||
|
||||
wkb_reader_read = wkb_read_func(GEOSFunc('GEOSWKBReader_read'))
|
||||
wkb_reader_read_hex = wkb_read_func(GEOSFunc('GEOSWKBReader_readHEX'))
|
||||
|
||||
wkb_reader_read = WKBReadFunc('GEOSWKBReader_read')
|
||||
wkb_reader_read_hex = WKBReadFunc('GEOSWKBReader_readHEX')
|
||||
|
||||
# WKBWriter routines
|
||||
wkb_writer_create = GEOSFunc('GEOSWKBWriter_create')
|
||||
wkb_writer_create.restype = WKB_WRITE_PTR
|
||||
|
||||
wkb_writer_destroy = GEOSFunc('GEOSWKBWriter_destroy')
|
||||
wkb_writer_destroy.argtypes = [WKB_WRITE_PTR]
|
||||
wkb_writer_create = GEOSFuncFactory('GEOSWKBWriter_create', restype=WKB_WRITE_PTR)
|
||||
wkb_writer_destroy = GEOSFuncFactory('GEOSWKBWriter_destroy', argtypes=[WKB_WRITE_PTR])
|
||||
|
||||
|
||||
# WKB Writing prototypes.
|
||||
def wkb_write_func(func):
|
||||
func.argtypes = [WKB_WRITE_PTR, GEOM_PTR, POINTER(c_size_t)]
|
||||
func.restype = c_uchar_p
|
||||
func.errcheck = check_sized_string
|
||||
return func
|
||||
class WKBWriteFunc(GEOSFuncFactory):
|
||||
argtypes = [WKB_WRITE_PTR, GEOM_PTR, POINTER(c_size_t)]
|
||||
restype = c_uchar_p
|
||||
errcheck = staticmethod(check_sized_string)
|
||||
|
||||
wkb_writer_write = wkb_write_func(GEOSFunc('GEOSWKBWriter_write'))
|
||||
wkb_writer_write_hex = wkb_write_func(GEOSFunc('GEOSWKBWriter_writeHEX'))
|
||||
|
||||
wkb_writer_write = WKBWriteFunc('GEOSWKBWriter_write')
|
||||
wkb_writer_write_hex = WKBWriteFunc('GEOSWKBWriter_writeHEX')
|
||||
|
||||
|
||||
# WKBWriter property getter/setter prototypes.
|
||||
def wkb_writer_get(func, restype=c_int):
|
||||
func.argtypes = [WKB_WRITE_PTR]
|
||||
func.restype = restype
|
||||
return func
|
||||
class WKBWriterGet(GEOSFuncFactory):
|
||||
argtypes = [WKB_WRITE_PTR]
|
||||
restype = c_int
|
||||
|
||||
|
||||
def wkb_writer_set(func, argtype=c_int):
|
||||
func.argtypes = [WKB_WRITE_PTR, argtype]
|
||||
return func
|
||||
class WKBWriterSet(GEOSFuncFactory):
|
||||
argtypes = [WKB_WRITE_PTR, c_int]
|
||||
|
||||
wkb_writer_get_byteorder = wkb_writer_get(GEOSFunc('GEOSWKBWriter_getByteOrder'))
|
||||
wkb_writer_set_byteorder = wkb_writer_set(GEOSFunc('GEOSWKBWriter_setByteOrder'))
|
||||
wkb_writer_get_outdim = wkb_writer_get(GEOSFunc('GEOSWKBWriter_getOutputDimension'))
|
||||
wkb_writer_set_outdim = wkb_writer_set(GEOSFunc('GEOSWKBWriter_setOutputDimension'))
|
||||
wkb_writer_get_include_srid = wkb_writer_get(GEOSFunc('GEOSWKBWriter_getIncludeSRID'), restype=c_char)
|
||||
wkb_writer_set_include_srid = wkb_writer_set(GEOSFunc('GEOSWKBWriter_setIncludeSRID'), argtype=c_char)
|
||||
wkb_writer_get_byteorder = WKBWriterGet('GEOSWKBWriter_getByteOrder')
|
||||
wkb_writer_set_byteorder = WKBWriterSet('GEOSWKBWriter_setByteOrder')
|
||||
wkb_writer_get_outdim = WKBWriterGet('GEOSWKBWriter_getOutputDimension')
|
||||
wkb_writer_set_outdim = WKBWriterSet('GEOSWKBWriter_setOutputDimension')
|
||||
wkb_writer_get_include_srid = WKBWriterGet('GEOSWKBWriter_getIncludeSRID', restype=c_char)
|
||||
wkb_writer_set_include_srid = WKBWriterSet('GEOSWKBWriter_setIncludeSRID', argtypes=[WKB_WRITE_PTR, c_char])
|
||||
|
||||
|
||||
# ### Base I/O Class ###
|
||||
|
|
|
|||
|
|
@ -4,35 +4,35 @@
|
|||
"""
|
||||
from ctypes import POINTER, c_double, c_int
|
||||
|
||||
from django.contrib.gis.geos.libgeos import GEOM_PTR
|
||||
from django.contrib.gis.geos.libgeos import GEOM_PTR, GEOSFuncFactory
|
||||
from django.contrib.gis.geos.prototypes.errcheck import check_dbl, check_string
|
||||
from django.contrib.gis.geos.prototypes.geom import geos_char_p
|
||||
from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
|
||||
from django.utils.six.moves import range
|
||||
|
||||
__all__ = ['geos_area', 'geos_distance', 'geos_length', 'geos_isvalidreason']
|
||||
|
||||
|
||||
# ### ctypes generator function ###
|
||||
def dbl_from_geom(func, num_geom=1):
|
||||
class DblFromGeom(GEOSFuncFactory):
|
||||
"""
|
||||
Argument is a Geometry, return type is double that is passed
|
||||
in by reference as the last argument.
|
||||
"""
|
||||
restype = c_int # Status code returned
|
||||
errcheck = staticmethod(check_dbl)
|
||||
|
||||
def get_func(self, num_geom=1):
|
||||
argtypes = [GEOM_PTR for i in range(num_geom)]
|
||||
argtypes += [POINTER(c_double)]
|
||||
func.argtypes = argtypes
|
||||
func.restype = c_int # Status code returned
|
||||
func.errcheck = check_dbl
|
||||
return func
|
||||
self.argtypes = argtypes
|
||||
return super(DblFromGeom, self).get_func()
|
||||
|
||||
|
||||
# ### ctypes prototypes ###
|
||||
|
||||
# Area, distance, and length prototypes.
|
||||
geos_area = dbl_from_geom(GEOSFunc('GEOSArea'))
|
||||
geos_distance = dbl_from_geom(GEOSFunc('GEOSDistance'), num_geom=2)
|
||||
geos_length = dbl_from_geom(GEOSFunc('GEOSLength'))
|
||||
geos_isvalidreason = GEOSFunc('GEOSisValidReason')
|
||||
geos_isvalidreason.argtypes = [GEOM_PTR]
|
||||
geos_isvalidreason.restype = geos_char_p
|
||||
geos_isvalidreason.errcheck = check_string
|
||||
geos_area = DblFromGeom('GEOSArea')
|
||||
geos_distance = DblFromGeom('GEOSDistance', num_geom=2)
|
||||
geos_length = DblFromGeom('GEOSLength')
|
||||
geos_isvalidreason = GEOSFuncFactory(
|
||||
'GEOSisValidReason', restype=geos_char_p, errcheck=check_string, argtypes=[GEOM_PTR]
|
||||
)
|
||||
|
|
|
|||
|
|
@ -4,45 +4,38 @@
|
|||
"""
|
||||
from ctypes import c_char, c_char_p, c_double
|
||||
|
||||
from django.contrib.gis.geos.libgeos import GEOM_PTR
|
||||
from django.contrib.gis.geos.libgeos import GEOM_PTR, GEOSFuncFactory
|
||||
from django.contrib.gis.geos.prototypes.errcheck import check_predicate
|
||||
from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
|
||||
|
||||
|
||||
# ## Binary & unary predicate functions ##
|
||||
def binary_predicate(func, *args):
|
||||
# ## Binary & unary predicate factories ##
|
||||
class UnaryPredicate(GEOSFuncFactory):
|
||||
"For GEOS unary predicate functions."
|
||||
argtypes = [GEOM_PTR]
|
||||
restype = c_char
|
||||
errcheck = staticmethod(check_predicate)
|
||||
|
||||
|
||||
class BinaryPredicate(UnaryPredicate):
|
||||
"For GEOS binary predicate functions."
|
||||
argtypes = [GEOM_PTR, GEOM_PTR]
|
||||
if args:
|
||||
argtypes += args
|
||||
func.argtypes = argtypes
|
||||
func.restype = c_char
|
||||
func.errcheck = check_predicate
|
||||
return func
|
||||
|
||||
|
||||
def unary_predicate(func):
|
||||
"For GEOS unary predicate functions."
|
||||
func.argtypes = [GEOM_PTR]
|
||||
func.restype = c_char
|
||||
func.errcheck = check_predicate
|
||||
return func
|
||||
|
||||
# ## Unary Predicates ##
|
||||
geos_hasz = unary_predicate(GEOSFunc('GEOSHasZ'))
|
||||
geos_isempty = unary_predicate(GEOSFunc('GEOSisEmpty'))
|
||||
geos_isring = unary_predicate(GEOSFunc('GEOSisRing'))
|
||||
geos_issimple = unary_predicate(GEOSFunc('GEOSisSimple'))
|
||||
geos_isvalid = unary_predicate(GEOSFunc('GEOSisValid'))
|
||||
geos_hasz = UnaryPredicate('GEOSHasZ')
|
||||
geos_isempty = UnaryPredicate('GEOSisEmpty')
|
||||
geos_isring = UnaryPredicate('GEOSisRing')
|
||||
geos_issimple = UnaryPredicate('GEOSisSimple')
|
||||
geos_isvalid = UnaryPredicate('GEOSisValid')
|
||||
|
||||
# ## Binary Predicates ##
|
||||
geos_contains = binary_predicate(GEOSFunc('GEOSContains'))
|
||||
geos_crosses = binary_predicate(GEOSFunc('GEOSCrosses'))
|
||||
geos_disjoint = binary_predicate(GEOSFunc('GEOSDisjoint'))
|
||||
geos_equals = binary_predicate(GEOSFunc('GEOSEquals'))
|
||||
geos_equalsexact = binary_predicate(GEOSFunc('GEOSEqualsExact'), c_double)
|
||||
geos_intersects = binary_predicate(GEOSFunc('GEOSIntersects'))
|
||||
geos_overlaps = binary_predicate(GEOSFunc('GEOSOverlaps'))
|
||||
geos_relatepattern = binary_predicate(GEOSFunc('GEOSRelatePattern'), c_char_p)
|
||||
geos_touches = binary_predicate(GEOSFunc('GEOSTouches'))
|
||||
geos_within = binary_predicate(GEOSFunc('GEOSWithin'))
|
||||
geos_contains = BinaryPredicate('GEOSContains')
|
||||
geos_crosses = BinaryPredicate('GEOSCrosses')
|
||||
geos_disjoint = BinaryPredicate('GEOSDisjoint')
|
||||
geos_equals = BinaryPredicate('GEOSEquals')
|
||||
geos_equalsexact = BinaryPredicate('GEOSEqualsExact', argtypes=[GEOM_PTR, GEOM_PTR, c_double])
|
||||
geos_intersects = BinaryPredicate('GEOSIntersects')
|
||||
geos_overlaps = BinaryPredicate('GEOSOverlaps')
|
||||
geos_relatepattern = BinaryPredicate('GEOSRelatePattern', argtypes=[GEOM_PTR, GEOM_PTR, c_char_p])
|
||||
geos_touches = BinaryPredicate('GEOSTouches')
|
||||
geos_within = BinaryPredicate('GEOSWithin')
|
||||
|
|
|
|||
|
|
@ -1,36 +1,30 @@
|
|||
from ctypes import c_char
|
||||
|
||||
from django.contrib.gis.geos.libgeos import (
|
||||
GEOM_PTR, PREPGEOM_PTR, geos_version_info,
|
||||
GEOM_PTR, PREPGEOM_PTR, GEOSFuncFactory,
|
||||
)
|
||||
from django.contrib.gis.geos.prototypes.errcheck import check_predicate
|
||||
from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
|
||||
|
||||
# Prepared geometry constructor and destructors.
|
||||
geos_prepare = GEOSFunc('GEOSPrepare')
|
||||
geos_prepare.argtypes = [GEOM_PTR]
|
||||
geos_prepare.restype = PREPGEOM_PTR
|
||||
|
||||
prepared_destroy = GEOSFunc('GEOSPreparedGeom_destroy')
|
||||
prepared_destroy.argtpes = [PREPGEOM_PTR]
|
||||
prepared_destroy.restype = None
|
||||
geos_prepare = GEOSFuncFactory('GEOSPrepare', argtypes=[GEOM_PTR], restype=PREPGEOM_PTR)
|
||||
prepared_destroy = GEOSFuncFactory('GEOSPreparedGeom_destroy', argtpes=[PREPGEOM_PTR])
|
||||
|
||||
|
||||
# Prepared geometry binary predicate support.
|
||||
def prepared_predicate(func):
|
||||
func.argtypes = [PREPGEOM_PTR, GEOM_PTR]
|
||||
func.restype = c_char
|
||||
func.errcheck = check_predicate
|
||||
return func
|
||||
class PreparedPredicate(GEOSFuncFactory):
|
||||
argtypes = [PREPGEOM_PTR, GEOM_PTR]
|
||||
restype = c_char
|
||||
errcheck = staticmethod(check_predicate)
|
||||
|
||||
prepared_contains = prepared_predicate(GEOSFunc('GEOSPreparedContains'))
|
||||
prepared_contains_properly = prepared_predicate(GEOSFunc('GEOSPreparedContainsProperly'))
|
||||
prepared_covers = prepared_predicate(GEOSFunc('GEOSPreparedCovers'))
|
||||
prepared_intersects = prepared_predicate(GEOSFunc('GEOSPreparedIntersects'))
|
||||
|
||||
if geos_version_info()['version'] > '3.3.0':
|
||||
prepared_crosses = prepared_predicate(GEOSFunc('GEOSPreparedCrosses'))
|
||||
prepared_disjoint = prepared_predicate(GEOSFunc('GEOSPreparedDisjoint'))
|
||||
prepared_overlaps = prepared_predicate(GEOSFunc('GEOSPreparedOverlaps'))
|
||||
prepared_touches = prepared_predicate(GEOSFunc('GEOSPreparedTouches'))
|
||||
prepared_within = prepared_predicate(GEOSFunc('GEOSPreparedWithin'))
|
||||
prepared_contains = PreparedPredicate('GEOSPreparedContains')
|
||||
prepared_contains_properly = PreparedPredicate('GEOSPreparedContainsProperly')
|
||||
prepared_covers = PreparedPredicate('GEOSPreparedCovers')
|
||||
prepared_intersects = PreparedPredicate('GEOSPreparedIntersects')
|
||||
|
||||
# Functions added in GEOS 3.3
|
||||
prepared_crosses = PreparedPredicate('GEOSPreparedCrosses')
|
||||
prepared_disjoint = PreparedPredicate('GEOSPreparedDisjoint')
|
||||
prepared_overlaps = PreparedPredicate('GEOSPreparedOverlaps')
|
||||
prepared_touches = PreparedPredicate('GEOSPreparedTouches')
|
||||
prepared_within = PreparedPredicate('GEOSPreparedWithin')
|
||||
|
|
|
|||
|
|
@ -2,64 +2,51 @@
|
|||
This module houses the GEOS ctypes prototype functions for the
|
||||
topological operations on geometries.
|
||||
"""
|
||||
__all__ = ['geos_boundary', 'geos_buffer', 'geos_cascaded_union',
|
||||
'geos_centroid', 'geos_convexhull', 'geos_difference',
|
||||
'geos_envelope', 'geos_intersection', 'geos_linemerge',
|
||||
'geos_pointonsurface', 'geos_preservesimplify', 'geos_simplify',
|
||||
'geos_symdifference', 'geos_union', 'geos_relate',
|
||||
'geos_project', 'geos_interpolate', 'geos_project_normalized',
|
||||
'geos_interpolate_normalized']
|
||||
|
||||
from ctypes import c_double, c_int
|
||||
|
||||
from django.contrib.gis.geos.libgeos import GEOM_PTR
|
||||
from django.contrib.gis.geos.libgeos import GEOM_PTR, GEOSFuncFactory
|
||||
from django.contrib.gis.geos.prototypes.errcheck import (
|
||||
check_geom, check_minus_one, check_string,
|
||||
)
|
||||
from django.contrib.gis.geos.prototypes.geom import geos_char_p
|
||||
from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
|
||||
|
||||
|
||||
def topology(func, *args, **kwargs):
|
||||
class Topology(GEOSFuncFactory):
|
||||
"For GEOS unary topology functions."
|
||||
argtypes = [GEOM_PTR]
|
||||
if args:
|
||||
argtypes += args
|
||||
func.argtypes = argtypes
|
||||
func.restype = kwargs.get('restype', GEOM_PTR)
|
||||
func.errcheck = kwargs.get('errcheck', check_geom)
|
||||
return func
|
||||
restype = GEOM_PTR
|
||||
errcheck = staticmethod(check_geom)
|
||||
|
||||
|
||||
# Topology Routines
|
||||
geos_boundary = topology(GEOSFunc('GEOSBoundary'))
|
||||
geos_buffer = topology(GEOSFunc('GEOSBuffer'), c_double, c_int)
|
||||
geos_centroid = topology(GEOSFunc('GEOSGetCentroid'))
|
||||
geos_convexhull = topology(GEOSFunc('GEOSConvexHull'))
|
||||
geos_difference = topology(GEOSFunc('GEOSDifference'), GEOM_PTR)
|
||||
geos_envelope = topology(GEOSFunc('GEOSEnvelope'))
|
||||
geos_intersection = topology(GEOSFunc('GEOSIntersection'), GEOM_PTR)
|
||||
geos_linemerge = topology(GEOSFunc('GEOSLineMerge'))
|
||||
geos_pointonsurface = topology(GEOSFunc('GEOSPointOnSurface'))
|
||||
geos_preservesimplify = topology(GEOSFunc('GEOSTopologyPreserveSimplify'), c_double)
|
||||
geos_simplify = topology(GEOSFunc('GEOSSimplify'), c_double)
|
||||
geos_symdifference = topology(GEOSFunc('GEOSSymDifference'), GEOM_PTR)
|
||||
geos_union = topology(GEOSFunc('GEOSUnion'), GEOM_PTR)
|
||||
geos_boundary = Topology('GEOSBoundary')
|
||||
geos_buffer = Topology('GEOSBuffer', argtypes=[GEOM_PTR, c_double, c_int])
|
||||
geos_centroid = Topology('GEOSGetCentroid')
|
||||
geos_convexhull = Topology('GEOSConvexHull')
|
||||
geos_difference = Topology('GEOSDifference', argtypes=[GEOM_PTR, GEOM_PTR])
|
||||
geos_envelope = Topology('GEOSEnvelope')
|
||||
geos_intersection = Topology('GEOSIntersection', argtypes=[GEOM_PTR, GEOM_PTR])
|
||||
geos_linemerge = Topology('GEOSLineMerge')
|
||||
geos_pointonsurface = Topology('GEOSPointOnSurface')
|
||||
geos_preservesimplify = Topology('GEOSTopologyPreserveSimplify', argtypes=[GEOM_PTR, c_double])
|
||||
geos_simplify = Topology('GEOSSimplify', argtypes=[GEOM_PTR, c_double])
|
||||
geos_symdifference = Topology('GEOSSymDifference', argtypes=[GEOM_PTR, GEOM_PTR])
|
||||
geos_union = Topology('GEOSUnion', argtypes=[GEOM_PTR, GEOM_PTR])
|
||||
|
||||
geos_cascaded_union = GEOSFunc('GEOSUnionCascaded')
|
||||
geos_cascaded_union.argtypes = [GEOM_PTR]
|
||||
geos_cascaded_union.restype = GEOM_PTR
|
||||
geos_cascaded_union = GEOSFuncFactory('GEOSUnionCascaded', argtypes=[GEOM_PTR], restype=GEOM_PTR)
|
||||
|
||||
# GEOSRelate returns a string, not a geometry.
|
||||
geos_relate = GEOSFunc('GEOSRelate')
|
||||
geos_relate.argtypes = [GEOM_PTR, GEOM_PTR]
|
||||
geos_relate.restype = geos_char_p
|
||||
geos_relate.errcheck = check_string
|
||||
geos_relate = GEOSFuncFactory(
|
||||
'GEOSRelate', argtypes=[GEOM_PTR, GEOM_PTR], restype=geos_char_p, errcheck=check_string
|
||||
)
|
||||
|
||||
# Linear referencing routines
|
||||
geos_project = topology(GEOSFunc('GEOSProject'), GEOM_PTR,
|
||||
restype=c_double, errcheck=check_minus_one)
|
||||
geos_interpolate = topology(GEOSFunc('GEOSInterpolate'), c_double)
|
||||
geos_project = GEOSFuncFactory(
|
||||
'GEOSProject', argtypes=[GEOM_PTR, GEOM_PTR], restype=c_double, errcheck=check_minus_one
|
||||
)
|
||||
geos_interpolate = Topology('GEOSInterpolate', argtypes=[GEOM_PTR, c_double])
|
||||
|
||||
geos_project_normalized = topology(GEOSFunc('GEOSProjectNormalized'),
|
||||
GEOM_PTR, restype=c_double, errcheck=check_minus_one)
|
||||
geos_interpolate_normalized = topology(GEOSFunc('GEOSInterpolateNormalized'), c_double)
|
||||
geos_project_normalized = GEOSFuncFactory(
|
||||
'GEOSProjectNormalized', argtypes=[GEOM_PTR, GEOM_PTR], restype=c_double, errcheck=check_minus_one
|
||||
)
|
||||
geos_interpolate_normalized = Topology('GEOSInterpolateNormalized', argtypes=[GEOM_PTR, c_double])
|
||||
|
|
|
|||
|
|
@ -23,14 +23,14 @@ if HAS_GEOS:
|
|||
class DistanceTest(TestCase):
|
||||
fixtures = ['initial']
|
||||
|
||||
if HAS_GEOS:
|
||||
def setUp(self):
|
||||
# A point we are testing distances with -- using a WGS84
|
||||
# coordinate that'll be implicitly transformed to that to
|
||||
# the coordinate system of the field, EPSG:32140 (Texas South Central
|
||||
# w/units in meters)
|
||||
stx_pnt = GEOSGeometry('POINT (-95.370401017314293 29.704867409475465)', 4326)
|
||||
self.stx_pnt = GEOSGeometry('POINT (-95.370401017314293 29.704867409475465)', 4326)
|
||||
# Another one for Australia
|
||||
au_pnt = GEOSGeometry('POINT (150.791 -34.4919)', 4326)
|
||||
self.au_pnt = GEOSGeometry('POINT (150.791 -34.4919)', 4326)
|
||||
|
||||
def get_names(self, qs):
|
||||
cities = [c.name for c in qs]
|
||||
|
|
|
|||
Loading…
Reference in New Issue