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/*
*
* WKTRaster - Raster Types for PostGIS
* http://trac.osgeo.org/postgis/wiki/WKTRaster
*
* Copyright (C) 2011-2013 Regents of the University of California
* <bkpark@ucdavis.edu>
* Copyright (C) 2010-2011 Jorge Arevalo <jorge.arevalo@deimos-space.com>
* Copyright (C) 2010-2011 David Zwarg <dzwarg@azavea.com>
* Copyright (C) 2009-2011 Pierre Racine <pierre.racine@sbf.ulaval.ca>
* Copyright (C) 2009-2011 Mateusz Loskot <mateusz@loskot.net>
* Copyright (C) 2008-2009 Sandro Santilli <strk@kbt.io>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <postgres.h>
#include <fmgr.h>
#include "rtpostgis.h"
Datum RASTER_in(PG_FUNCTION_ARGS);
Datum RASTER_out(PG_FUNCTION_ARGS);
Datum RASTER_noop(PG_FUNCTION_ARGS);
Datum RASTER_to_bytea(PG_FUNCTION_ARGS);
Datum RASTER_to_binary(PG_FUNCTION_ARGS);
/**
* Input is a string with hex chars in it.
* Convert to binary and put in the result
*/
PG_FUNCTION_INFO_V1(RASTER_in);
Datum RASTER_in(PG_FUNCTION_ARGS)
{
rt_raster raster;
char *hexwkb = PG_GETARG_CSTRING(0);
void *result = NULL;
POSTGIS_RT_DEBUG(3, "Starting");
raster = rt_raster_from_hexwkb(hexwkb, strlen(hexwkb));
if (raster == NULL)
PG_RETURN_NULL();
result = rt_raster_serialize(raster);
rt_raster_destroy(raster);
if (result == NULL)
PG_RETURN_NULL();
SET_VARSIZE(result, ((rt_pgraster*)result)->size);
PG_RETURN_POINTER(result);
}
/**
* Given a RASTER structure, convert it to Hex and put it in a string
*/
PG_FUNCTION_INFO_V1(RASTER_out);
Datum RASTER_out(PG_FUNCTION_ARGS)
{
rt_pgraster *pgraster = NULL;
rt_raster raster = NULL;
uint32_t hexwkbsize = 0;
char *hexwkb = NULL;
POSTGIS_RT_DEBUG(3, "Starting");
if (PG_ARGISNULL(0)) PG_RETURN_NULL();
pgraster = (rt_pgraster *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
raster = rt_raster_deserialize(pgraster, FALSE);
if (!raster) {
PG_FREE_IF_COPY(pgraster, 0);
elog(ERROR, "RASTER_out: Could not deserialize raster");
PG_RETURN_NULL();
}
hexwkb = rt_raster_to_hexwkb(raster, FALSE, &hexwkbsize);
if (!hexwkb) {
rt_raster_destroy(raster);
PG_FREE_IF_COPY(pgraster, 0);
elog(ERROR, "RASTER_out: Could not HEX-WKBize raster");
PG_RETURN_NULL();
}
/* Free the raster objects used */
rt_raster_destroy(raster);
PG_FREE_IF_COPY(pgraster, 0);
PG_RETURN_CSTRING(hexwkb);
}
/**
* Return bytea object with raster in Well-Known-Binary form.
*/
PG_FUNCTION_INFO_V1(RASTER_to_bytea);
Datum RASTER_to_bytea(PG_FUNCTION_ARGS)
{
rt_pgraster *pgraster = NULL;
rt_raster raster = NULL;
uint8_t *wkb = NULL;
uint32_t wkb_size = 0;
bytea *result = NULL;
int result_size = 0;
if (PG_ARGISNULL(0)) PG_RETURN_NULL();
pgraster = (rt_pgraster *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
/* Get raster object */
raster = rt_raster_deserialize(pgraster, FALSE);
if (!raster) {
PG_FREE_IF_COPY(pgraster, 0);
elog(ERROR, "RASTER_to_bytea: Could not deserialize raster");
PG_RETURN_NULL();
}
/* Parse raster to wkb object */
wkb = rt_raster_to_wkb(raster, FALSE, &wkb_size);
if (!wkb) {
rt_raster_destroy(raster);
PG_FREE_IF_COPY(pgraster, 0);
elog(ERROR, "RASTER_to_bytea: Could not allocate and generate WKB data");
PG_RETURN_NULL();
}
/* Create varlena object */
result_size = wkb_size + VARHDRSZ;
result = (bytea *)palloc(result_size);
SET_VARSIZE(result, result_size);
memcpy(VARDATA(result), wkb, VARSIZE(result) - VARHDRSZ);
/* Free raster objects used */
rt_raster_destroy(raster);
pfree(wkb);
PG_FREE_IF_COPY(pgraster, 0);
PG_RETURN_POINTER(result);
}
/**
* Return bytea object with raster in Well-Known-Binary form requested using ST_AsBinary function.
*/
PG_FUNCTION_INFO_V1(RASTER_to_binary);
Datum RASTER_to_binary(PG_FUNCTION_ARGS)
{
rt_pgraster *pgraster = NULL;
rt_raster raster = NULL;
uint8_t *wkb = NULL;
uint32_t wkb_size = 0;
char *result = NULL;
int result_size = 0;
int outasin = FALSE;
if (PG_ARGISNULL(0)) PG_RETURN_NULL();
pgraster = (rt_pgraster *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
/* Get raster object */
raster = rt_raster_deserialize(pgraster, FALSE);
if (!raster) {
PG_FREE_IF_COPY(pgraster, 0);
elog(ERROR, "RASTER_to_binary: Could not deserialize raster");
PG_RETURN_NULL();
}
if (!PG_ARGISNULL(1))
outasin = PG_GETARG_BOOL(1);
/* Parse raster to wkb object */
wkb = rt_raster_to_wkb(raster, outasin, &wkb_size);
if (!wkb) {
rt_raster_destroy(raster);
PG_FREE_IF_COPY(pgraster, 0);
elog(ERROR, "RASTER_to_binary: Could not allocate and generate WKB data");
PG_RETURN_NULL();
}
/* Create varlena object */
result_size = wkb_size + VARHDRSZ;
result = (char *)palloc(result_size);
SET_VARSIZE(result, result_size);
memcpy(VARDATA(result), wkb, VARSIZE(result) - VARHDRSZ);
/* Free raster objects used */
rt_raster_destroy(raster);
pfree(wkb);
PG_FREE_IF_COPY(pgraster, 0);
PG_RETURN_POINTER(result);
}
PG_FUNCTION_INFO_V1(RASTER_noop);
Datum RASTER_noop(PG_FUNCTION_ARGS)
{
rt_raster raster;
rt_pgraster *pgraster, *result;
pgraster = (rt_pgraster *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
raster = rt_raster_deserialize(pgraster, FALSE);
if (!raster) {
PG_FREE_IF_COPY(pgraster, 0);
elog(ERROR, "RASTER_noop: Could not deserialize raster");
PG_RETURN_NULL();
}
result = rt_raster_serialize(raster);
rt_raster_destroy(raster);
if (result == NULL)
PG_RETURN_NULL();
SET_VARSIZE(result, raster->size);
PG_RETURN_POINTER(result);
}
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