PostGIS  2.5.0dev-r@@SVN_REVISION@@
Datum contains ( PG_FUNCTION_ARGS  )

Definition at line 1729 of file postgis/lwgeom_geos.c.

References PrepGeomCache::argnum, error_if_srid_mismatch(), errorIfGeometryCollection(), gbox_contains_2d(), LWMPOINT::geoms, GetPrepGeomCache(), GetRtreeCache(), gserialized_get_gbox_p(), gserialized_get_srid(), gserialized_get_type(), gserialized_is_empty(), HANDLE_GEOS_ERROR, is_point(), is_poly(), LW_FALSE, LW_TRUE, lwgeom_as_lwmpoint(), lwgeom_as_lwpoint(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_geos_error(), lwmpoint_free(), MULTIPOINTTYPE, LWMPOINT::ngeoms, pip_short_circuit(), POINTTYPE, POSTGIS2GEOS(), and PrepGeomCache::prepared_geom.

Referenced by _lwt_AddFaceSplit(), _lwt_AddPoint(), _lwt_CheckEdgeCrossing(), _lwt_FindFaceContainingRing(), lwpoly_split_by_line(), and lwpoly_to_points().

1730 {
1731  GSERIALIZED *geom1;
1732  GSERIALIZED *geom2;
1733  GEOSGeometry *g1, *g2;
1734  GBOX box1, box2;
1735  int result;
1736  PrepGeomCache *prep_cache;
1737 
1738  geom1 = PG_GETARG_GSERIALIZED_P(0);
1739  geom2 = PG_GETARG_GSERIALIZED_P(1);
1740 
1741  errorIfGeometryCollection(geom1,geom2);
1743 
1744  /* A.Contains(Empty) == FALSE */
1745  if ( gserialized_is_empty(geom1) || gserialized_is_empty(geom2) )
1746  PG_RETURN_BOOL(false);
1747 
1748  POSTGIS_DEBUG(3, "contains called.");
1749 
1750  /*
1751  ** short-circuit 1: if geom2 bounding box is not completely inside
1752  ** geom1 bounding box we can prematurely return FALSE.
1753  */
1754  if ( gserialized_get_gbox_p(geom1, &box1) &&
1755  gserialized_get_gbox_p(geom2, &box2) )
1756  {
1757  if ( ! gbox_contains_2d(&box1, &box2) )
1758  {
1759  PG_RETURN_BOOL(false);
1760  }
1761  }
1762 
1763  /*
1764  ** short-circuit 2: if geom2 is a point and geom1 is a polygon
1765  ** call the point-in-polygon function.
1766  */
1767  if (is_poly(geom1) && is_point(geom2))
1768  {
1769  GSERIALIZED* gpoly = is_poly(geom1) ? geom1 : geom2;
1770  GSERIALIZED* gpoint = is_point(geom1) ? geom1 : geom2;
1771  RTREE_POLY_CACHE* cache = GetRtreeCache(fcinfo, gpoly);
1772  int retval;
1773 
1774  POSTGIS_DEBUG(3, "Point in Polygon test requested...short-circuiting.");
1775  if (gserialized_get_type(gpoint) == POINTTYPE)
1776  {
1777  LWGEOM* point = lwgeom_from_gserialized(gpoint);
1778  int pip_result = pip_short_circuit(cache, lwgeom_as_lwpoint(point), gpoly);
1779  lwgeom_free(point);
1780 
1781  retval = (pip_result == 1); /* completely inside */
1782  }
1783  else if (gserialized_get_type(gpoint) == MULTIPOINTTYPE)
1784  {
1786  uint32_t i;
1787  int found_completely_inside = LW_FALSE;
1788 
1789  retval = LW_TRUE;
1790  for (i = 0; i < mpoint->ngeoms; i++)
1791  {
1792  /* We need to find at least one point that's completely inside the
1793  * polygons (pip_result == 1). As long as we have one point that's
1794  * completely inside, we can have as many as we want on the boundary
1795  * itself. (pip_result == 0)
1796  */
1797  int pip_result = pip_short_circuit(cache, mpoint->geoms[i], gpoly);
1798  if (pip_result == 1)
1799  found_completely_inside = LW_TRUE;
1800 
1801  if (pip_result == -1) /* completely outside */
1802  {
1803  retval = LW_FALSE;
1804  break;
1805  }
1806  }
1807 
1808  retval = retval && found_completely_inside;
1809  lwmpoint_free(mpoint);
1810  }
1811  else
1812  {
1813  /* Never get here */
1814  elog(ERROR,"Type isn't point or multipoint!");
1815  PG_RETURN_NULL();
1816  }
1817 
1818  PG_FREE_IF_COPY(geom1, 0);
1819  PG_FREE_IF_COPY(geom2, 1);
1820  PG_RETURN_BOOL(retval);
1821  }
1822  else
1823  {
1824  POSTGIS_DEBUGF(3, "Contains: type1: %d, type2: %d", gserialized_get_type(geom1), gserialized_get_type(geom2));
1825  }
1826 
1827  initGEOS(lwpgnotice, lwgeom_geos_error);
1828 
1829  prep_cache = GetPrepGeomCache( fcinfo, geom1, 0 );
1830 
1831  if ( prep_cache && prep_cache->prepared_geom && prep_cache->argnum == 1 )
1832  {
1833  g1 = (GEOSGeometry *)POSTGIS2GEOS(geom2);
1834  if (!g1)
1835  HANDLE_GEOS_ERROR("Geometry could not be converted to GEOS");
1836 
1837  POSTGIS_DEBUG(4, "containsPrepared: cache is live, running preparedcontains");
1838  result = GEOSPreparedContains( prep_cache->prepared_geom, g1);
1839  GEOSGeom_destroy(g1);
1840  }
1841  else
1842  {
1843  g1 = (GEOSGeometry *)POSTGIS2GEOS(geom1);
1844  if (!g1)
1846  "First argument geometry could not be converted to "
1847  "GEOS");
1848  g2 = (GEOSGeometry *)POSTGIS2GEOS(geom2);
1849  if (!g2)
1850  {
1852  "Second argument geometry could not be converted "
1853  "to GEOS");
1854  GEOSGeom_destroy(g1);
1855  }
1856  POSTGIS_DEBUG(4, "containsPrepared: cache is not ready, running standard contains");
1857  result = GEOSContains( g1, g2);
1858  GEOSGeom_destroy(g1);
1859  GEOSGeom_destroy(g2);
1860  }
1861 
1862  if (result == 2) HANDLE_GEOS_ERROR("GEOSContains");
1863 
1864  PG_FREE_IF_COPY(geom1, 0);
1865  PG_FREE_IF_COPY(geom2, 1);
1866 
1867  PG_RETURN_BOOL(result);
1868 
1869 }
int gserialized_get_gbox_p(const GSERIALIZED *g, GBOX *box)
Read the bounding box off a serialization and calculate one if it is not already there.
Definition: g_serialized.c:639
uint32_t gserialized_get_type(const GSERIALIZED *s)
Extract the geometry type from the serialized form (it hides in the anonymous data area...
Definition: g_serialized.c:86
uint32_t ngeoms
Definition: liblwgeom.h:467
const GEOSPreparedGeometry * prepared_geom
static char is_poly(const GSERIALIZED *g)
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1137
#define MULTIPOINTTYPE
Definition: liblwgeom.h:87
The tree structure used for fast P-i-P tests by point_in_multipolygon_rtree()
Definition: lwgeom_rtree.h:57
int gbox_contains_2d(const GBOX *g1, const GBOX *g2)
Return LW_TRUE if the first GBOX contains the second on the 2d plane, LW_FALSE otherwise.
Definition: g_box.c:346
void error_if_srid_mismatch(int srid1, int srid2)
Definition: lwutil.c:338
LWPOINT * lwgeom_as_lwpoint(const LWGEOM *lwgeom)
Definition: lwgeom.c:160
static char is_point(const GSERIALIZED *g)
int gserialized_is_empty(const GSERIALIZED *g)
Check if a GSERIALIZED is empty without deserializing first.
Definition: g_serialized.c:178
unsigned int uint32_t
Definition: uthash.h:78
void lwmpoint_free(LWMPOINT *mpt)
Definition: lwmpoint.c:72
void lwgeom_geos_error(const char *fmt,...)
#define LW_FALSE
Definition: liblwgeom.h:76
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:75
LWPOINT ** geoms
Definition: liblwgeom.h:469
GEOSGeometry * POSTGIS2GEOS(GSERIALIZED *pglwgeom)
#define POINTTYPE
LWTYPE numbers, used internally by PostGIS.
Definition: liblwgeom.h:84
LWMPOINT * lwgeom_as_lwmpoint(const LWGEOM *lwgeom)
Definition: lwgeom.c:232
PrepGeomCache * GetPrepGeomCache(FunctionCallInfoData *fcinfo, GSERIALIZED *g1, GSERIALIZED *g2)
Given a couple potential geometries and a function call context, return a prepared structure for one ...
#define HANDLE_GEOS_ERROR(label)
RTREE_POLY_CACHE * GetRtreeCache(FunctionCallInfoData *fcinfo, GSERIALIZED *g1)
Checks for a cache hit against the provided geometry and returns a pre-built index structure (RTREE_P...
Definition: lwgeom_rtree.c:432
int32_t gserialized_get_srid(const GSERIALIZED *s)
Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function)...
Definition: g_serialized.c:99
static int pip_short_circuit(RTREE_POLY_CACHE *poly_cache, LWPOINT *point, GSERIALIZED *gpoly)
void errorIfGeometryCollection(GSERIALIZED *g1, GSERIALIZED *g2)
Throws an ereport ERROR if either geometry is a COLLECTIONTYPE.

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