PostGIS  2.5.1dev-r@@SVN_REVISION@@

◆ RASTER_getBandPixelType()

Datum RASTER_getBandPixelType ( PG_FUNCTION_ARGS  )

Definition at line 72 of file rtpg_band_properties.c.

References ovdump::band, FALSE, PG_FUNCTION_INFO_V1(), rtrowdump::raster, RASTER_getBandPixelTypeName(), rt_band_get_pixtype(), rt_raster_deserialize(), rt_raster_destroy(), and rt_raster_get_band().

73 {
74  rt_pgraster *pgraster = NULL;
75  rt_raster raster = NULL;
76  rt_band band = NULL;
77  rt_pixtype pixtype;
78  int32_t bandindex;
79 
80  /* Deserialize raster */
81  if (PG_ARGISNULL(0)) PG_RETURN_NULL();
82  pgraster = (rt_pgraster *)PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
83 
84  /* Index is 1-based */
85  bandindex = PG_GETARG_INT32(1);
86  if ( bandindex < 1 ) {
87  elog(NOTICE, "Invalid band index (must use 1-based). Returning NULL");
88  PG_FREE_IF_COPY(pgraster, 0);
89  PG_RETURN_NULL();
90  }
91 
92  raster = rt_raster_deserialize(pgraster, FALSE);
93  if ( ! raster ) {
94  PG_FREE_IF_COPY(pgraster, 0);
95  elog(ERROR, "RASTER_getBandPixelType: Could not deserialize raster");
96  PG_RETURN_NULL();
97  }
98 
99  /* Fetch requested band and its pixel type */
100  band = rt_raster_get_band(raster, bandindex - 1);
101  if ( ! band ) {
102  elog(NOTICE, "Could not find raster band of index %d when getting pixel type. Returning NULL", bandindex);
103  rt_raster_destroy(raster);
104  PG_FREE_IF_COPY(pgraster, 0);
105  PG_RETURN_NULL();
106  }
107 
108  pixtype = rt_band_get_pixtype(band);
109 
110  rt_raster_destroy(raster);
111  PG_FREE_IF_COPY(pgraster, 0);
112 
113  PG_RETURN_INT32(pixtype);
114 }
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_pixtype
Definition: librtcore.h:185
rt_band rt_raster_get_band(rt_raster raster, int bandNum)
Return Nth band, or NULL if unavailable.
Definition: rt_raster.c:381
void rt_raster_destroy(rt_raster raster)
Release memory associated to a raster.
Definition: rt_raster.c:82
#define FALSE
Definition: dbfopen.c:168
Struct definitions.
Definition: librtcore.h:2250
rt_pixtype rt_band_get_pixtype(rt_band band)
Return pixeltype of this band.
Definition: rt_band.c:631
rt_raster rt_raster_deserialize(void *serialized, int header_only)
Return a raster from a serialized form.
Definition: rt_serialize.c:725
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