PostGIS  2.2.8dev-r@@SVN_REVISION@@

◆ RASTER_makeEmpty()

Datum RASTER_makeEmpty ( PG_FUNCTION_ARGS  )

Definition at line 55 of file rtpg_create.c.

References PG_FUNCTION_INFO_V1(), POSTGIS_RT_DEBUGF, rtrowdump::raster, RASTER_addBand(), rt_raster_destroy(), rt_raster_new(), rt_raster_serialize(), rt_raster_set_offsets(), rt_raster_set_scale(), rt_raster_set_skews(), rt_raster_set_srid(), rt_raster_serialized_t::size, and SRID_UNKNOWN.

56 {
57  uint16 width = 0, height = 0;
58  double ipx = 0, ipy = 0, scalex = 0, scaley = 0, skewx = 0, skewy = 0;
59  int32_t srid = SRID_UNKNOWN;
60  rt_pgraster *pgraster = NULL;
62 
63  if (PG_NARGS() < 9) {
64  elog(ERROR, "RASTER_makeEmpty: ST_MakeEmptyRaster requires 9 args");
65  PG_RETURN_NULL();
66  }
67 
68  if (!PG_ARGISNULL(0))
69  width = PG_GETARG_UINT16(0);
70 
71  if (!PG_ARGISNULL(1))
72  height = PG_GETARG_UINT16(1);
73 
74  if (!PG_ARGISNULL(2))
75  ipx = PG_GETARG_FLOAT8(2);
76 
77  if (!PG_ARGISNULL(3))
78  ipy = PG_GETARG_FLOAT8(3);
79 
80  if (!PG_ARGISNULL(4))
81  scalex = PG_GETARG_FLOAT8(4);
82 
83  if (!PG_ARGISNULL(5))
84  scaley = PG_GETARG_FLOAT8(5);
85 
86  if (!PG_ARGISNULL(6))
87  skewx = PG_GETARG_FLOAT8(6);
88 
89  if (!PG_ARGISNULL(7))
90  skewy = PG_GETARG_FLOAT8(7);
91 
92  if (!PG_ARGISNULL(8))
93  srid = PG_GETARG_INT32(8);
94 
95  POSTGIS_RT_DEBUGF(4, "%dx%d, ip:%g,%g, scale:%g,%g, skew:%g,%g srid:%d",
96  width, height, ipx, ipy, scalex, scaley,
97  skewx, skewy, srid);
98 
99  raster = rt_raster_new(width, height);
100  if (raster == NULL)
101  PG_RETURN_NULL(); /* error was supposedly printed already */
102 
103  rt_raster_set_scale(raster, scalex, scaley);
104  rt_raster_set_offsets(raster, ipx, ipy);
105  rt_raster_set_skews(raster, skewx, skewy);
106  rt_raster_set_srid(raster, srid);
107 
108  pgraster = rt_raster_serialize(raster);
109  rt_raster_destroy(raster);
110  if (!pgraster)
111  PG_RETURN_NULL();
112 
113  SET_VARSIZE(pgraster, pgraster->size);
114  PG_RETURN_POINTER(pgraster);
115 }
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
void rt_raster_set_skews(rt_raster raster, double skewX, double skewY)
Set skews about the X and Y axis.
Definition: rt_raster.c:168
#define POSTGIS_RT_DEBUGF(level, msg,...)
Definition: rtpostgis.h:57
void rt_raster_set_scale(rt_raster raster, double scaleX, double scaleY)
Set scale in projection units.
Definition: rt_raster.c:137
void rt_raster_set_offsets(rt_raster raster, double x, double y)
Set insertion points in projection units.
Definition: rt_raster.c:199
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:172
void rt_raster_set_srid(rt_raster raster, int32_t srid)
Set raster&#39;s SRID.
Definition: rt_raster.c:363
void rt_raster_destroy(rt_raster raster)
Release memory associated to a raster.
Definition: rt_raster.c:82
rt_raster rt_raster_new(uint32_t width, uint32_t height)
Construct a raster with given dimensions.
Definition: rt_raster.c:48
Struct definitions.
Definition: librtcore.h:2213
Here is the call graph for this function: