PostGIS  2.5.0beta2dev-r@@SVN_REVISION@@

◆ RASTER_setBandNoDataValue()

Datum RASTER_setBandNoDataValue ( PG_FUNCTION_ARGS  )

Definition at line 775 of file rtpg_band_properties.c.

References ovdump::band, FALSE, PG_FUNCTION_INFO_V1(), POSTGIS_RT_DEBUGF, rtrowdump::raster, RASTER_setBandIsNoData(), rt_band_check_is_nodata(), rt_band_set_hasnodata_flag(), rt_band_set_nodata(), rt_raster_deserialize(), rt_raster_destroy(), rt_raster_get_band(), rt_raster_serialize(), rt_raster_serialized_t::size, and TRUE.

Referenced by RASTER_bandmetadata().

776 {
777  rt_pgraster *pgraster = NULL;
778  rt_pgraster *pgrtn = NULL;
779  rt_raster raster = NULL;
780  rt_band band = NULL;
781  double nodata;
782  int32_t bandindex;
783  bool forcechecking = FALSE;
784  bool skipset = FALSE;
785 
786  /* Deserialize raster */
787  if (PG_ARGISNULL(0))
788  PG_RETURN_NULL();
789  pgraster = (rt_pgraster *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
790 
791  /* Check index is not NULL or smaller than 1 */
792  if (PG_ARGISNULL(1))
793  bandindex = -1;
794  else
795  bandindex = PG_GETARG_INT32(1);
796  if (bandindex < 1) {
797  elog(NOTICE, "Invalid band index (must use 1-based). Nodata value not set. Returning original raster");
798  skipset = TRUE;
799  }
800 
801  raster = rt_raster_deserialize(pgraster, FALSE);
802  if (!raster) {
803  PG_FREE_IF_COPY(pgraster, 0);
804  elog(ERROR, "RASTER_setBandNoDataValue: Could not deserialize raster");
805  PG_RETURN_NULL();
806  }
807 
808  if (!skipset) {
809  /* Fetch requested band */
810  band = rt_raster_get_band(raster, bandindex - 1);
811  if (!band) {
812  elog(NOTICE, "Could not find raster band of index %d when setting pixel value. Nodata value not set. Returning original raster", bandindex);
813  }
814  else {
815  if (!PG_ARGISNULL(3))
816  forcechecking = PG_GETARG_BOOL(3);
817 
818  if (PG_ARGISNULL(2)) {
819  /* Set the hasnodata flag to FALSE */
821  POSTGIS_RT_DEBUGF(3, "Raster band %d does not have a nodata value", bandindex);
822  }
823  else {
824  /* Get the nodata value */
825  nodata = PG_GETARG_FLOAT8(2);
826 
827  /* Set the band's nodata value */
828  rt_band_set_nodata(band, nodata, NULL);
829 
830  /* Recheck all pixels if requested */
831  if (forcechecking)
833  }
834  }
835  }
836 
837  pgrtn = rt_raster_serialize(raster);
838  rt_raster_destroy(raster);
839  PG_FREE_IF_COPY(pgraster, 0);
840  if (!pgrtn)
841  PG_RETURN_NULL();
842 
843  SET_VARSIZE(pgrtn, pgrtn->size);
844  PG_RETURN_POINTER(pgrtn);
845 }
void * rt_raster_serialize(rt_raster raster)
Return this raster in serialized form.
Definition: rt_serialize.c:521
raster
Be careful!! Zeros function&#39;s input parameter can be a (height x width) array, not (width x height): ...
Definition: rtrowdump.py:121
band
Definition: ovdump.py:57
rt_errorstate rt_band_set_nodata(rt_band band, double val, int *converted)
Set nodata value.
Definition: rt_band.c:733
#define POSTGIS_RT_DEBUGF(level, msg,...)
Definition: rtpostgis.h:65
rt_band rt_raster_get_band(rt_raster raster, int bandNum)
Return Nth band, or NULL if unavailable.
Definition: rt_raster.c:381
int rt_band_check_is_nodata(rt_band band)
Returns TRUE if the band is only nodata values.
Definition: rt_band.c:1752
void rt_raster_destroy(rt_raster raster)
Release memory associated to a raster.
Definition: rt_raster.c:82
void rt_band_set_hasnodata_flag(rt_band band, int flag)
Set hasnodata flag value.
Definition: rt_band.c:681
#define FALSE
Definition: dbfopen.c:168
Struct definitions.
Definition: librtcore.h:2250
#define TRUE
Definition: dbfopen.c:169
rt_raster rt_raster_deserialize(void *serialized, int header_only)
Return a raster from a serialized form.
Definition: rt_serialize.c:717
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