CPLXMLNode* OGR_G_ExportEnvelopeToKMLTree( OGRGeometryH hGeometry )
{
VALIDATE_POINTER1( hGeometry, "OGR_G_ExportEnvelopeToKMLTree", NULL );
CPLXMLNode* psBox = NULL;
CPLXMLNode* psCoord = NULL;
OGREnvelope sEnvelope;
char szCoordinate[256] = { 0 };
char* pszY = NULL;
memset( &sEnvelope, 0, sizeof(sEnvelope) );
((OGRGeometry*)(hGeometry))->getEnvelope( &sEnvelope );
if( sEnvelope.MinX == 0 && sEnvelope.MaxX == 0
&& sEnvelope.MaxX == 0 && sEnvelope.MaxY == 0 )
{
/* there is apparently a special way of representing a null box
geometry ... we should use it here eventually. */
return NULL;
}
psBox = CPLCreateXMLNode( NULL, CXT_Element, "Box" );
/* -------------------------------------------------------------------- */
/* Add minxy coordinate. */
/* -------------------------------------------------------------------- */
psCoord = CPLCreateXMLNode( psBox, CXT_Element, "coord" );
MakeKMLCoordinate( szCoordinate, sEnvelope.MinX, sEnvelope.MinY, 0.0,
FALSE );
pszY = strstr(szCoordinate,",") + 1;
pszY[-1] = '\0';
CPLCreateXMLElementAndValue( psCoord, "X", szCoordinate );
CPLCreateXMLElementAndValue( psCoord, "Y", pszY );
/* -------------------------------------------------------------------- */
/* Add maxxy coordinate. */
/* -------------------------------------------------------------------- */
psCoord = CPLCreateXMLNode( psBox, CXT_Element, "coord" );
MakeKMLCoordinate( szCoordinate, sEnvelope.MaxX, sEnvelope.MaxY, 0.0,
FALSE );
pszY = strstr(szCoordinate,",") + 1;
pszY[-1] = '\0';
CPLCreateXMLElementAndValue( psCoord, "X", szCoordinate );
CPLCreateXMLElementAndValue( psCoord, "Y", pszY );
return psBox;
}
static void AppendCoordinateList( OGRLineString *poLine,
char **ppszText, size_t *pnLength,
size_t *pnMaxLength )
{
char szCoordinate[256]= { 0 };
const bool b3D = CPL_TO_BOOL(wkbHasZ(poLine->getGeometryType()));
*pnLength += strlen(*ppszText + *pnLength);
_GrowBuffer( *pnLength + 20, ppszText, pnMaxLength );
strcat( *ppszText + *pnLength, "<coordinates>" );
*pnLength += strlen(*ppszText + *pnLength);
for( int iPoint = 0; iPoint < poLine->getNumPoints(); iPoint++ )
{
MakeKMLCoordinate( szCoordinate, sizeof(szCoordinate),
poLine->getX(iPoint),
poLine->getY(iPoint),
poLine->getZ(iPoint),
b3D );
_GrowBuffer( *pnLength + strlen(szCoordinate)+1,
ppszText, pnMaxLength );
if( iPoint != 0 )
strcat( *ppszText + *pnLength, " " );
strcat( *ppszText + *pnLength, szCoordinate );
*pnLength += strlen(*ppszText + *pnLength);
}
_GrowBuffer( *pnLength + 20, ppszText, pnMaxLength );
strcat( *ppszText + *pnLength, "</coordinates>" );
*pnLength += strlen(*ppszText + *pnLength);
}
static void AppendCoordinateList( OGRLineString *poLine,
char **ppszText, int *pnLength,
int *pnMaxLength )
{
char szCoordinate[256]= { 0 };
int b3D = (poLine->getGeometryType() & wkb25DBit);
*pnLength += strlen(*ppszText + *pnLength);
_GrowBuffer( *pnLength + 20, ppszText, pnMaxLength );
strcat( *ppszText + *pnLength, "<coordinates>" );
*pnLength += strlen(*ppszText + *pnLength);
for( int iPoint = 0; iPoint < poLine->getNumPoints(); iPoint++ )
{
MakeKMLCoordinate( szCoordinate,
poLine->getX(iPoint),
poLine->getY(iPoint),
poLine->getZ(iPoint),
b3D );
_GrowBuffer( *pnLength + strlen(szCoordinate)+1,
ppszText, pnMaxLength );
if( iPoint != 0 )
strcat( *ppszText + *pnLength, " " );
strcat( *ppszText + *pnLength, szCoordinate );
*pnLength += strlen(*ppszText + *pnLength);
}
_GrowBuffer( *pnLength + 20, ppszText, pnMaxLength );
strcat( *ppszText + *pnLength, "</coordinates>" );
*pnLength += strlen(*ppszText + *pnLength);
}
static bool OGR2KMLGeometryAppend( OGRGeometry *poGeometry,
char **ppszText, size_t *pnLength,
size_t *pnMaxLength, char *szAltitudeMode )
{
/* -------------------------------------------------------------------- */
/* 2D Point */
/* -------------------------------------------------------------------- */
if( poGeometry->getGeometryType() == wkbPoint )
{
OGRPoint* poPoint = static_cast<OGRPoint*>(poGeometry);
if (poPoint->getCoordinateDimension() == 0)
{
_GrowBuffer( *pnLength + 10,
ppszText, pnMaxLength );
strcat( *ppszText + *pnLength, "<Point/>");
*pnLength += strlen( *ppszText + *pnLength );
}
else
{
char szCoordinate[256] = { 0 };
MakeKMLCoordinate( szCoordinate, sizeof(szCoordinate),
poPoint->getX(), poPoint->getY(), 0.0, FALSE );
_GrowBuffer( *pnLength + strlen(szCoordinate) + 60,
ppszText, pnMaxLength );
snprintf( *ppszText + *pnLength, *pnMaxLength - *pnLength,
"<Point><coordinates>%s</coordinates></Point>",
szCoordinate );
*pnLength += strlen( *ppszText + *pnLength );
}
}
/* -------------------------------------------------------------------- */
/* 3D Point */
/* -------------------------------------------------------------------- */
else if( poGeometry->getGeometryType() == wkbPoint25D )
{
char szCoordinate[256] = { 0 };
OGRPoint *poPoint = static_cast<OGRPoint*>(poGeometry);
MakeKMLCoordinate( szCoordinate, sizeof(szCoordinate),
poPoint->getX(), poPoint->getY(), poPoint->getZ(),
true );
if (NULL == szAltitudeMode)
{
_GrowBuffer( *pnLength + strlen(szCoordinate) + 70,
ppszText, pnMaxLength );
snprintf( *ppszText + *pnLength, *pnMaxLength - *pnLength,
"<Point><coordinates>%s</coordinates></Point>",
szCoordinate );
}
else
{
_GrowBuffer( *pnLength + strlen(szCoordinate)
+ strlen(szAltitudeMode) + 70,
ppszText, pnMaxLength );
snprintf( *ppszText + *pnLength, *pnMaxLength - *pnLength,
"<Point>%s<coordinates>%s</coordinates></Point>",
szAltitudeMode, szCoordinate );
}
*pnLength += strlen( *ppszText + *pnLength );
}
/* -------------------------------------------------------------------- */
/* LineString and LinearRing */
/* -------------------------------------------------------------------- */
else if( poGeometry->getGeometryType() == wkbLineString
|| poGeometry->getGeometryType() == wkbLineString25D )
{
const bool bRing = EQUAL(poGeometry->getGeometryName(),"LINEARRING");
if( bRing )
AppendString( ppszText, pnLength, pnMaxLength,
"<LinearRing>" );
else
AppendString( ppszText, pnLength, pnMaxLength,
"<LineString>" );
if (NULL != szAltitudeMode)
{
AppendString( ppszText, pnLength, pnMaxLength, szAltitudeMode);
}
AppendCoordinateList( reinterpret_cast<OGRLineString *>(poGeometry),
ppszText, pnLength, pnMaxLength );
if( bRing )
AppendString( ppszText, pnLength, pnMaxLength,
"</LinearRing>" );
else
AppendString( ppszText, pnLength, pnMaxLength,
"</LineString>" );
}
/* -------------------------------------------------------------------- */
/* Polygon */
/* -------------------------------------------------------------------- */
else if( poGeometry->getGeometryType() == wkbPolygon
|| poGeometry->getGeometryType() == wkbPolygon25D )
{
OGRPolygon* poPolygon = static_cast<OGRPolygon*>(poGeometry);
AppendString( ppszText, pnLength, pnMaxLength, "<Polygon>" );
if (NULL != szAltitudeMode)
{
AppendString( ppszText, pnLength, pnMaxLength, szAltitudeMode);
}
if( poPolygon->getExteriorRing() != NULL )
{
AppendString( ppszText, pnLength, pnMaxLength,
"<outerBoundaryIs>" );
if( !OGR2KMLGeometryAppend( poPolygon->getExteriorRing(),
ppszText, pnLength, pnMaxLength,
szAltitudeMode ) )
{
return false;
}
AppendString( ppszText, pnLength, pnMaxLength,
"</outerBoundaryIs>" );
}
for( int iRing = 0; iRing < poPolygon->getNumInteriorRings(); iRing++ )
{
OGRLinearRing *poRing = poPolygon->getInteriorRing(iRing);
AppendString( ppszText, pnLength, pnMaxLength,
"<innerBoundaryIs>" );
if( !OGR2KMLGeometryAppend( poRing, ppszText, pnLength,
pnMaxLength, szAltitudeMode ) )
{
return false;
}
AppendString( ppszText, pnLength, pnMaxLength,
"</innerBoundaryIs>" );
}
AppendString( ppszText, pnLength, pnMaxLength,
"</Polygon>" );
}
/* -------------------------------------------------------------------- */
/* MultiPolygon */
/* -------------------------------------------------------------------- */
else if( wkbFlatten(poGeometry->getGeometryType()) == wkbMultiPolygon
|| wkbFlatten(poGeometry->getGeometryType()) == wkbMultiLineString
|| wkbFlatten(poGeometry->getGeometryType()) == wkbMultiPoint
|| wkbFlatten(poGeometry->getGeometryType()) ==
wkbGeometryCollection )
{
OGRGeometryCollection* poGC = NULL;
poGC = static_cast<OGRGeometryCollection*>(poGeometry);
AppendString( ppszText, pnLength, pnMaxLength, "<MultiGeometry>" );
// XXX - mloskot
//if (NULL != szAltitudeMode)
//{
// AppendString( ppszText, pnLength, pnMaxLength, szAltitudeMode);
//}
for( int iMember = 0; iMember < poGC->getNumGeometries(); iMember++)
{
OGRGeometry *poMember = poGC->getGeometryRef( iMember );
if( !OGR2KMLGeometryAppend( poMember, ppszText, pnLength,
pnMaxLength, szAltitudeMode ) )
{
return false;
}
}
AppendString( ppszText, pnLength, pnMaxLength, "</MultiGeometry>" );
}
else
{
return false;
}
return true;
}
