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ogrgrasslayer.cpp
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/******************************************************************************
*
* Project: OpenGIS Simple Features Reference Implementation
* Purpose: Implements OGRGRASSLayer class.
* Author: Radim Blazek, radim.blazek@gmail.com
*
******************************************************************************
* Copyright (c) 2005, Radim Blazek <radim.blazek@gmail.com>
* Copyright (c) 2008-2020, Even Rouault <even dot rouault at spatialys.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include <signal.h>
#include "ogrgrass.h"
#include "cpl_conv.h"
/************************************************************************/
/* OGRGRASSLayer() */
/************************************************************************/
OGRGRASSLayer::OGRGRASSLayer(int layerIndex, struct Map_info *map)
{
CPLDebug("GRASS", "OGRGRASSLayer::OGRGRASSLayer layerIndex = %d",
layerIndex);
iLayerIndex = layerIndex;
poMap = map;
poSRS = NULL;
iNextId = 0;
poPoints = Vect_new_line_struct();
poCats = Vect_new_cats_struct();
pszQuery = NULL;
paQueryMatch = NULL;
paSpatialMatch = NULL;
iCurrentCat = 0;
iLayer = Vect_cidx_get_field_number(poMap, iLayerIndex);
CPLDebug("GRASS", "iLayer = %d", iLayer);
poLink = Vect_get_field(poMap, iLayer); // May be NULL if not defined
// Layer name
if (poLink && poLink->name)
{
pszName = CPLStrdup(poLink->name);
}
else
{
char buf[20];
snprintf(buf, sizeof(buf), "%d", iLayer);
pszName = CPLStrdup(buf);
}
// Because we don't represent centroids as any simple feature, we have to scan
// category index and create index of feature IDs pointing to category index
nTotalCount =
Vect_cidx_get_type_count(poMap, iLayer, GV_POINT | GV_LINES | GV_AREA);
CPLDebug("GRASS", "nTotalCount = %d", nTotalCount);
paFeatureIndex = (int *)CPLMalloc(nTotalCount * sizeof(int));
int n =
Vect_cidx_get_type_count(poMap, iLayer, GV_POINTS | GV_LINES | GV_AREA);
int cnt = 0;
for (int i = 0; i < n; i++)
{
int cat, type, id;
Vect_cidx_get_cat_by_index(poMap, iLayerIndex, i, &cat, &type, &id);
if (!(type & (GV_POINT | GV_LINES | GV_AREA)))
continue;
paFeatureIndex[cnt++] = i;
}
poFeatureDefn = new OGRFeatureDefn(pszName);
SetDescription(poFeatureDefn->GetName());
poFeatureDefn->Reference();
// Get type definition
int nTypes = Vect_cidx_get_num_types_by_index(poMap, iLayerIndex);
int types = 0;
for (int i = 0; i < nTypes; i++)
{
int type, count;
Vect_cidx_get_type_count_by_index(poMap, iLayerIndex, i, &type, &count);
if (!(type & (GV_POINT | GV_LINES | GV_AREA)))
continue;
types |= type;
CPLDebug("GRASS", "type = %d types = %d", type, types);
}
OGRwkbGeometryType eGeomType = wkbUnknown;
if (types == GV_LINE || types == GV_BOUNDARY || types == GV_LINES)
{
eGeomType = wkbLineString;
}
else if (types == GV_POINT)
{
eGeomType = wkbPoint;
}
else if (types == GV_AREA)
{
CPLDebug("GRASS", "set wkbPolygon");
eGeomType = wkbPolygon;
}
if (Vect_is_3d(poMap))
poFeatureDefn->SetGeomType(wkbSetZ(eGeomType));
else
poFeatureDefn->SetGeomType(eGeomType);
// Get attributes definition
poDbString = (dbString *)CPLMalloc(sizeof(dbString));
poCursor = (dbCursor *)CPLMalloc(sizeof(dbCursor));
bCursorOpened = FALSE;
poDriver = NULL;
bHaveAttributes = false;
db_init_string(poDbString);
if (poLink)
{
if (StartDbDriver())
{
db_set_string(poDbString, poLink->table);
dbTable *table = NULL;
if (db_describe_table(poDriver, poDbString, &table) == DB_OK)
{
nFields = db_get_table_number_of_columns(table);
iCatField = -1;
for (int i = 0; i < nFields; i++)
{
dbColumn *column = db_get_table_column(table, i);
int ctype =
db_sqltype_to_Ctype(db_get_column_sqltype(column));
OGRFieldType ogrFtype = OFTInteger;
switch (ctype)
{
case DB_C_TYPE_INT:
ogrFtype = OFTInteger;
break;
case DB_C_TYPE_DOUBLE:
ogrFtype = OFTReal;
break;
case DB_C_TYPE_STRING:
ogrFtype = OFTString;
break;
case DB_C_TYPE_DATETIME:
ogrFtype = OFTDateTime;
break;
}
CPLDebug("GRASS", "column = %s type = %d",
db_get_column_name(column), ctype);
OGRFieldDefn oField(db_get_column_name(column), ogrFtype);
poFeatureDefn->AddFieldDefn(&oField);
if (G_strcasecmp(db_get_column_name(column), poLink->key) ==
0)
{
iCatField = i;
}
}
if (iCatField >= 0)
{
bHaveAttributes = true;
}
else
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot find key field");
db_close_database_shutdown_driver(poDriver);
poDriver = NULL;
}
}
else
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot describe table %s", poLink->table);
}
db_close_database_shutdown_driver(poDriver);
poDriver = NULL;
}
}
if (!bHaveAttributes &&
iLayer > 0) // Because features in layer 0 have no cats
{
OGRFieldDefn oField("cat", OFTInteger);
poFeatureDefn->AddFieldDefn(&oField);
}
if (getenv("GISBASE")) // We have some projection info in GISBASE
{
struct Key_Value *projinfo, *projunits;
// Note: we do not have to reset GISDBASE and LOCATION_NAME because
// OGRGRASSLayer constructor is called from OGRGRASSDataSource::Open
// where those variables are set
projinfo = G_get_projinfo();
projunits = G_get_projunits();
char *srsWkt = GPJ_grass_to_wkt(projinfo, projunits, 0, 0);
if (srsWkt)
{
poSRS = new OGRSpatialReference(srsWkt);
poSRS->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
G_free(srsWkt);
}
G_free_key_value(projinfo);
G_free_key_value(projunits);
}
}
/************************************************************************/
/* ~OGRGRASSLayer() */
/************************************************************************/
OGRGRASSLayer::~OGRGRASSLayer()
{
if (bCursorOpened)
{
db_close_cursor(poCursor);
}
if (poDriver)
{
StopDbDriver();
}
if (pszName)
CPLFree(pszName);
if (poFeatureDefn)
poFeatureDefn->Release();
if (poSRS)
poSRS->Release();
if (pszQuery)
CPLFree(pszQuery);
if (paFeatureIndex)
CPLFree(paFeatureIndex);
if (poLink)
G_free(poLink);
Vect_destroy_line_struct(poPoints);
Vect_destroy_cats_struct(poCats);
db_free_string(poDbString);
CPLFree(poDbString);
CPLFree(poCursor);
if (paSpatialMatch)
CPLFree(paSpatialMatch);
if (paQueryMatch)
CPLFree(paQueryMatch);
}
/************************************************************************/
/* StartDbDriver */
/************************************************************************/
bool OGRGRASSLayer::StartDbDriver()
{
CPLDebug("GRASS", "StartDbDriver()");
bCursorOpened = false;
if (!poLink)
{
return false;
}
poDriver = db_start_driver_open_database(poLink->driver, poLink->database);
if (poDriver == NULL)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot open database %s by driver %s, "
"check if GISBASE environment variable is set, the driver is "
"available "
" and the database is accessible.",
poLink->driver, poLink->database);
return false;
}
return true;
}
/************************************************************************/
/* StopDbDriver */
/************************************************************************/
bool OGRGRASSLayer::StopDbDriver()
{
if (!poDriver)
{
CPLError(CE_Failure, CPLE_AppDefined, "Driver is not started");
return true; // I think that true is OK here
}
// TODO!!!: Because of bug in GRASS library it is impossible
// to stop drivers in FIFO order. Until this is fixed
// we have to use kill
CPLDebug("GRASS", "driver PID = %d", poDriver->pid);
#if defined(_WIN32) || defined(__WIN32__)
db_close_database_shutdown_driver(poDriver);
#else
if (kill(poDriver->pid, SIGINT) != 0)
{
if (kill(poDriver->pid, SIGKILL) != 0)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot stop database "
"driver pid = %d",
poDriver->pid);
}
}
#endif
bCursorOpened = false;
return true;
}
/************************************************************************/
/* ResetReading() */
/************************************************************************/
void OGRGRASSLayer::ResetReading()
{
iNextId = 0;
if (bCursorOpened)
{
ResetSequentialCursor();
}
}
/************************************************************************/
/* SetNextByIndex() */
/* */
/* If we already have an FID list, we can easily reposition */
/* ourselves in it. */
/************************************************************************/
OGRErr OGRGRASSLayer::SetNextByIndex(GIntBig nIndex)
{
if (m_poFilterGeom != NULL || m_poAttrQuery != NULL)
{
iNextId = 0;
int count = 0;
while (true)
{
if (iNextId >= nTotalCount)
break;
if (count == nIndex)
break;
// Attributes
if (pszQuery != NULL && !paQueryMatch[iNextId])
{
iNextId++;
continue;
}
// Spatial
if (m_poFilterGeom && !paSpatialMatch[iNextId])
{
iNextId++;
continue;
}
count++;
}
}
iNextId = nIndex;
return OGRERR_NONE;
}
/************************************************************************/
/* SetAttributeFilter */
/************************************************************************/
OGRErr OGRGRASSLayer::SetAttributeFilter(const char *query)
{
CPLDebug("GRASS", "SetAttributeFilter: %s", query);
if (query == NULL)
{
// Release old if any
if (pszQuery)
{
CPLFree(pszQuery);
pszQuery = NULL;
}
if (paQueryMatch)
{
CPLFree(paQueryMatch);
paQueryMatch = NULL;
}
return OGRERR_NONE;
}
paQueryMatch = (char *)CPLMalloc(nTotalCount);
memset(paQueryMatch, 0x0, nTotalCount);
pszQuery = CPLStrdup(query);
OGRLayer::SetAttributeFilter(query); // Otherwise crash on delete
if (bHaveAttributes)
{
if (!poDriver)
{
StartDbDriver();
}
if (poDriver)
{
if (bCursorOpened)
{
db_close_cursor(poCursor);
bCursorOpened = false;
}
OpenSequentialCursor();
if (bCursorOpened)
{
SetQueryMatch();
db_close_cursor(poCursor);
bCursorOpened = false;
}
else
{
CPLFree(pszQuery);
pszQuery = NULL;
return OGRERR_FAILURE;
}
db_close_database_shutdown_driver(poDriver);
poDriver = NULL;
}
else
{
CPLFree(pszQuery);
pszQuery = NULL;
return OGRERR_FAILURE;
}
}
else
{
// Use OGR to evaluate category match
for (int i = 0; i < nTotalCount; i++)
{
OGRFeature *feature = GetFeature(i);
CPLDebug("GRASS", "i = %d eval = %d", i,
m_poAttrQuery->Evaluate(feature));
if (m_poAttrQuery->Evaluate(feature))
{
paQueryMatch[i] = 1;
}
}
}
return OGRERR_NONE;
}
/************************************************************************/
/* SetQueryMatch */
/************************************************************************/
bool OGRGRASSLayer::SetQueryMatch()
{
CPLDebug("GRASS", "SetQueryMatch");
// NOTE: we don't have to call ResetSequentialCursor() first because
// this method is called immediately after OpenSequentialCursor()
if (!bCursorOpened)
{
CPLError(CE_Failure, CPLE_AppDefined, "Cursor is not opened.");
return false;
}
int more;
int cidx = 0; // index to category index
int fidx = 0; // index to feature index (paFeatureIndex)
// number of categories in category index
int ncats = Vect_cidx_get_num_cats_by_index(poMap, iLayerIndex);
dbTable *table = db_get_cursor_table(poCursor);
while (true)
{
if (db_fetch(poCursor, DB_NEXT, &more) != DB_OK)
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot fetch attributes.");
return false;
}
if (!more)
break;
dbColumn *column = db_get_table_column(table, iCatField);
dbValue *value = db_get_column_value(column);
int cat = db_get_value_int(value);
// NOTE: because of bug in GRASS library it is impossible to use
// Vect_cidx_find_next
// Go through category index until first record of current category
// is found or a category > current is found
int id = -1;
while (cidx < ncats)
{
int cidxcat = 0;
int type = 0;
Vect_cidx_get_cat_by_index(poMap, iLayerIndex, cidx, &cidxcat,
&type, &id);
if (cidxcat < cat)
{
cidx++;
continue;
}
if (cidxcat > cat)
break; // Not found
// We have the category we want, check type
if (!(type & (GV_POINT | GV_LINES | GV_AREA)))
{
cidx++;
continue;
}
// Both category and type match -> find feature and set it on
while (true)
{
if (fidx > nTotalCount || paFeatureIndex[fidx] > cidx)
{
// should not happen
break;
}
if (paFeatureIndex[fidx] == cidx)
{
paQueryMatch[fidx] = 1;
fidx++;
break;
}
fidx++;
}
cidx++;
}
if (id < 0)
continue; // not found
}
return true;
}
/************************************************************************/
/* OpenSequentialCursor */
/************************************************************************/
bool OGRGRASSLayer::OpenSequentialCursor()
{
CPLDebug("GRASS", "OpenSequentialCursor: %s", pszQuery);
if (!poDriver)
{
CPLError(CE_Failure, CPLE_AppDefined, "Driver not opened.");
return false;
}
if (bCursorOpened)
{
db_close_cursor(poCursor);
bCursorOpened = false;
}
char buf[2000];
snprintf(buf, sizeof(buf), "SELECT * FROM %s ", poLink->table);
db_set_string(poDbString, buf);
if (pszQuery)
{
snprintf(buf, sizeof(buf), "WHERE %s ", pszQuery);
db_append_string(poDbString, buf);
}
snprintf(buf, sizeof(buf), "ORDER BY %s", poLink->key);
db_append_string(poDbString, buf);
CPLDebug("GRASS", "Query: %s", db_get_string(poDbString));
if (db_open_select_cursor(poDriver, poDbString, poCursor, DB_SCROLL) ==
DB_OK)
{
iCurrentCat = -1;
bCursorOpened = true;
CPLDebug("GRASS", "num rows = %d", db_get_num_rows(poCursor));
}
else
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot open cursor.");
return false;
}
return true;
}
/************************************************************************/
/* ResetSequentialCursor */
/************************************************************************/
bool OGRGRASSLayer::ResetSequentialCursor()
{
CPLDebug("GRASS", "ResetSequentialCursor");
int more;
if (db_fetch(poCursor, DB_FIRST, &more) != DB_OK)
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot reset cursor.");
return false;
}
if (db_fetch(poCursor, DB_PREVIOUS, &more) != DB_OK)
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot reset cursor.");
return false;
}
return true;
}
/************************************************************************/
/* SetSpatialFilter */
/************************************************************************/
void OGRGRASSLayer::SetSpatialFilter(OGRGeometry *poGeomIn)
{
CPLDebug("GRASS", "SetSpatialFilter");
OGRLayer::SetSpatialFilter(poGeomIn);
if (poGeomIn == NULL)
{
// Release old if any
if (paSpatialMatch)
{
CPLFree(paSpatialMatch);
paSpatialMatch = NULL;
}
return;
}
SetSpatialMatch();
}
/************************************************************************/
/* SetSpatialMatch */
/************************************************************************/
bool OGRGRASSLayer::SetSpatialMatch()
{
CPLDebug("GRASS", "SetSpatialMatch");
if (!paSpatialMatch)
{
paSpatialMatch = (char *)CPLMalloc(nTotalCount);
}
memset(paSpatialMatch, 0x0, nTotalCount);
OGRLineString *lstring = new OGRLineString();
lstring->setNumPoints(5);
OGRGeometry *geom = lstring;
for (int i = 0; i < nTotalCount; i++)
{
int cidx = paFeatureIndex[i];
int cat, type, id;
Vect_cidx_get_cat_by_index(poMap, iLayerIndex, cidx, &cat, &type, &id);
struct bound_box box;
switch (type)
{
case GV_POINT:
case GV_LINE:
case GV_BOUNDARY:
Vect_get_line_box(poMap, id, &box);
break;
case GV_AREA:
Vect_get_area_box(poMap, id, &box);
break;
}
lstring->setPoint(0, box.W, box.N, 0.);
lstring->setPoint(1, box.W, box.S, 0.);
lstring->setPoint(2, box.E, box.S, 0.);
lstring->setPoint(3, box.E, box.N, 0.);
lstring->setPoint(4, box.W, box.N, 0.);
if (FilterGeometry(geom))
{
CPLDebug("GRASS", "Feature %d in filter", i);
paSpatialMatch[i] = 1;
}
}
delete lstring;
return true;
}
/************************************************************************/
/* GetNextFeature() */
/************************************************************************/
OGRFeature *OGRGRASSLayer::GetNextFeature()
{
CPLDebug("GRASS", "OGRGRASSLayer::GetNextFeature");
OGRFeature *poFeature = NULL;
int cat;
// Get next iNextId
while (true)
{
if (iNextId >= nTotalCount) // No more features
{
// Close cursor / driver if opened
if (bCursorOpened)
{
db_close_cursor(poCursor);
bCursorOpened = false;
}
if (poDriver)
{
db_close_database_shutdown_driver(poDriver);
poDriver = NULL;
}
return NULL;
}
// Attributes
if (pszQuery != NULL && !paQueryMatch[iNextId])
{
iNextId++;
continue;
}
// Spatial
if (m_poFilterGeom && !paSpatialMatch[iNextId])
{
iNextId++;
continue;
}
break; // Attributes & spatial filter match
}
OGRGeometry *poOGR = GetFeatureGeometry(iNextId, &cat);
poFeature = new OGRFeature(poFeatureDefn);
poFeature->SetGeometryDirectly(poOGR);
poFeature->SetFID(iNextId);
iNextId++;
// Get attributes
CPLDebug("GRASS", "bHaveAttributes = %d", bHaveAttributes);
if (bHaveAttributes)
{
if (!poDriver)
{
StartDbDriver();
}
if (poDriver)
{
if (!bCursorOpened)
{
OpenSequentialCursor();
}
if (bCursorOpened)
{
dbTable *table = db_get_cursor_table(poCursor);
if (iCurrentCat < cat)
{
while (true)
{
int more;
if (db_fetch(poCursor, DB_NEXT, &more) != DB_OK)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot fetch attributes.");
break;
}
if (!more)
break;
dbColumn *column =
db_get_table_column(table, iCatField);
dbValue *value = db_get_column_value(column);
iCurrentCat = db_get_value_int(value);
if (iCurrentCat >= cat)
break;
}
}
if (cat == iCurrentCat)
{
SetAttributes(poFeature, table);
}
else
{
CPLError(CE_Failure, CPLE_AppDefined,
"Attributes not found.");
}
}
}
}
else if (iLayer > 0) // Add category
{
poFeature->SetField(0, cat);
}
m_nFeaturesRead++;
return poFeature;
}
/************************************************************************/
/* GetFeature() */
/************************************************************************/
OGRFeature *OGRGRASSLayer::GetFeature(GIntBig nFeatureId)
{
CPLDebug("GRASS", "OGRGRASSLayer::GetFeature nFeatureId = " CPL_FRMT_GIB,
nFeatureId);
int cat;
OGRGeometry *poOGR = GetFeatureGeometry(nFeatureId, &cat);
OGRFeature *poFeature = new OGRFeature(poFeatureDefn);
poFeature->SetGeometryDirectly(poOGR);
poFeature->SetFID(nFeatureId);
// Get attributes
if (bHaveAttributes && !poDriver)
{
StartDbDriver();
}
if (poDriver)
{
if (bCursorOpened)
{
db_close_cursor(poCursor);
bCursorOpened = false;
}
CPLDebug("GRASS", "Open cursor for key = %d", cat);
char buf[2000];
snprintf(buf, sizeof(buf), "SELECT * FROM %s WHERE %s = %d",
poLink->table, poLink->key, cat);
db_set_string(poDbString, buf);
if (db_open_select_cursor(poDriver, poDbString, poCursor,
DB_SEQUENTIAL) == DB_OK)
{
iCurrentCat = cat; // Not important
bCursorOpened = true;
}
else
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot open cursor.");
}
if (bCursorOpened)
{
int more;
if (db_fetch(poCursor, DB_NEXT, &more) != DB_OK)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot fetch attributes.");
}
else
{
if (!more)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Attributes not found.");
}
else
{
dbTable *table = db_get_cursor_table(poCursor);
SetAttributes(poFeature, table);
}
}
db_close_cursor(poCursor);
bCursorOpened = false;
}
}
else if (iLayer > 0) // Add category
{
poFeature->SetField(0, cat);
}
m_nFeaturesRead++;
return poFeature;
}
/************************************************************************/
/* GetFeatureGeometry() */
/************************************************************************/
OGRGeometry *OGRGRASSLayer::GetFeatureGeometry(long nFeatureId, int *cat)
{
CPLDebug("GRASS", "OGRGRASSLayer::GetFeatureGeometry nFeatureId = %ld",
nFeatureId);
int cidx = paFeatureIndex[(int)nFeatureId];
int type, id;
Vect_cidx_get_cat_by_index(poMap, iLayerIndex, cidx, cat, &type, &id);
//CPLDebug ( "GRASS", "cat = %d type = %d id = %d", *cat, type, id );
OGRGeometry *poOGR = NULL;
int bIs3D = Vect_is_3d(poMap);
switch (type)
{
case GV_POINT:
{
Vect_read_line(poMap, poPoints, poCats, id);
if (bIs3D)
poOGR = new OGRPoint(poPoints->x[0], poPoints->y[0],
poPoints->z[0]);
else
poOGR = new OGRPoint(poPoints->x[0], poPoints->y[0]);
}
break;
case GV_LINE:
case GV_BOUNDARY:
{
Vect_read_line(poMap, poPoints, poCats, id);
OGRLineString *poOGRLine = new OGRLineString();
if (bIs3D)
poOGRLine->setPoints(poPoints->n_points, poPoints->x,
poPoints->y, poPoints->z);
else
poOGRLine->setPoints(poPoints->n_points, poPoints->x,
poPoints->y);
poOGR = poOGRLine;
}
break;
case GV_AREA:
{
Vect_get_area_points(poMap, id, poPoints);
OGRPolygon *poOGRPoly = new OGRPolygon();
OGRLinearRing *poRing = new OGRLinearRing();
if (bIs3D)
poRing->setPoints(poPoints->n_points, poPoints->x, poPoints->y,
poPoints->z);
else
poRing->setPoints(poPoints->n_points, poPoints->x, poPoints->y);
poOGRPoly->addRingDirectly(poRing);
// Islands
int nisles = Vect_get_area_num_isles(poMap, id);
for (int i = 0; i < nisles; i++)
{
int isle = Vect_get_area_isle(poMap, id, i);
Vect_get_isle_points(poMap, isle, poPoints);
poRing = new OGRLinearRing();
if (bIs3D)
poRing->setPoints(poPoints->n_points, poPoints->x,
poPoints->y, poPoints->z);
else
poRing->setPoints(poPoints->n_points, poPoints->x,
poPoints->y);
poOGRPoly->addRingDirectly(poRing);
}
poOGR = poOGRPoly;
}
break;
default: // Should not happen
{
CPLError(CE_Failure, CPLE_AppDefined,