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

Definition at line 1951 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_AddPolygon(), and rt_raster_compute_skewed_raster().

1952 {
1953  GSERIALIZED *geom1;
1954  GSERIALIZED *geom2;
1955  int result;
1956  GBOX box1, box2;
1957  PrepGeomCache *prep_cache;
1958 
1959  geom1 = PG_GETARG_GSERIALIZED_P(0);
1960  geom2 = PG_GETARG_GSERIALIZED_P(1);
1961 
1962  /* A.Covers(Empty) == FALSE */
1963  if ( gserialized_is_empty(geom1) || gserialized_is_empty(geom2) )
1964  PG_RETURN_BOOL(false);
1965 
1966  errorIfGeometryCollection(geom1,geom2);
1968 
1969  /*
1970  * short-circuit 1: if geom2 bounding box is not completely inside
1971  * geom1 bounding box we can prematurely return FALSE.
1972  */
1973  if ( gserialized_get_gbox_p(geom1, &box1) &&
1974  gserialized_get_gbox_p(geom2, &box2) )
1975  {
1976  if ( ! gbox_contains_2d(&box1, &box2) )
1977  {
1978  PG_RETURN_BOOL(false);
1979  }
1980  }
1981  /*
1982  * short-circuit 2: if geom2 is a point and geom1 is a polygon
1983  * call the point-in-polygon function.
1984  */
1985  if (is_poly(geom1) && is_point(geom2))
1986  {
1987  GSERIALIZED* gpoly = is_poly(geom1) ? geom1 : geom2;
1988  GSERIALIZED* gpoint = is_point(geom1) ? geom1 : geom2;
1989  RTREE_POLY_CACHE* cache = GetRtreeCache(fcinfo, gpoly);
1990  int retval;
1991 
1992  POSTGIS_DEBUG(3, "Point in Polygon test requested...short-circuiting.");
1993  if (gserialized_get_type(gpoint) == POINTTYPE)
1994  {
1995  LWGEOM* point = lwgeom_from_gserialized(gpoint);
1996  int pip_result = pip_short_circuit(cache, lwgeom_as_lwpoint(point), gpoly);
1997  lwgeom_free(point);
1998 
1999  retval = (pip_result != -1); /* not outside */
2000  }
2001  else if (gserialized_get_type(gpoint) == MULTIPOINTTYPE)
2002  {
2004  uint32_t i;
2005 
2006  retval = LW_TRUE;
2007  for (i = 0; i < mpoint->ngeoms; i++)
2008  {
2009  int pip_result = pip_short_circuit(cache, mpoint->geoms[i], gpoly);
2010  if (pip_result == -1)
2011  {
2012  retval = LW_FALSE;
2013  break;
2014  }
2015  }
2016 
2017  lwmpoint_free(mpoint);
2018  }
2019  else
2020  {
2021  /* Never get here */
2022  elog(ERROR,"Type isn't point or multipoint!");
2023  PG_RETURN_NULL();
2024  }
2025 
2026  PG_FREE_IF_COPY(geom1, 0);
2027  PG_FREE_IF_COPY(geom2, 1);
2028  PG_RETURN_BOOL(retval);
2029  }
2030  else
2031  {
2032  POSTGIS_DEBUGF(3, "Covers: type1: %d, type2: %d", gserialized_get_type(geom1), gserialized_get_type(geom2));
2033  }
2034 
2035  initGEOS(lwpgnotice, lwgeom_geos_error);
2036 
2037  prep_cache = GetPrepGeomCache( fcinfo, geom1, 0 );
2038 
2039  if ( prep_cache && prep_cache->prepared_geom && prep_cache->argnum == 1 )
2040  {
2041  GEOSGeometry *g1 = (GEOSGeometry *)POSTGIS2GEOS(geom2);
2042  if (!g1)
2044  "First argument geometry could not be converted to "
2045  "GEOS");
2046  result = GEOSPreparedCovers( prep_cache->prepared_geom, g1);
2047  GEOSGeom_destroy(g1);
2048  }
2049  else
2050  {
2051  GEOSGeometry *g1;
2052  GEOSGeometry *g2;
2053 
2054  g1 = (GEOSGeometry *)POSTGIS2GEOS(geom1);
2055  if (!g1)
2057  "First argument geometry could not be converted to "
2058  "GEOS");
2059  g2 = (GEOSGeometry *)POSTGIS2GEOS(geom2);
2060  if (!g2)
2061  {
2062  GEOSGeom_destroy(g1);
2064  "Second argument geometry could not be converted "
2065  "to GEOS");
2066  }
2067  result = GEOSRelatePattern( g1, g2, "******FF*" );
2068  GEOSGeom_destroy(g1);
2069  GEOSGeom_destroy(g2);
2070  }
2071 
2072  if (result == 2) HANDLE_GEOS_ERROR("GEOSCovers");
2073 
2074  PG_FREE_IF_COPY(geom1, 0);
2075  PG_FREE_IF_COPY(geom2, 1);
2076 
2077  PG_RETURN_BOOL(result);
2078 
2079 }
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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