int msContourLayerClose(layerObj *layer)
{
contourLayerInfo *clinfo = (contourLayerInfo *) layer->layerinfo;
if (layer->debug)
msDebug("Entering msContourLayerClose().\n");
if (clinfo) {
if (clinfo->hOGRDS)
msConnPoolRelease(&clinfo->ogrLayer, clinfo->hOGRDS);
msLayerClose(&clinfo->ogrLayer);
if (clinfo->hDS) {
GDALClose(clinfo->hDS);
clinfo->hDS = NULL;
free(clinfo->buffer);
}
if (clinfo->hOrigDS) {
GDALClose(clinfo->hOrigDS);
clinfo->hOrigDS = NULL;
}
msContourLayerInfoFree(layer);
}
return MS_SUCCESS;
}
int msContourLayerWhichShapes(layerObj *layer, rectObj rect, int isQuery)
{
rectObj newRect;
contourLayerInfo *clinfo = (contourLayerInfo *) layer->layerinfo;
if (layer->debug)
msDebug("Entering msContourLayerWhichShapes().\n");
if (clinfo == NULL) {
msSetError(MS_MISCERR, "Assertion failed: Contour layer not opened!!!",
"msContourLayerWhichShapes()");
return MS_FAILURE;
}
newRect = rect;
#ifdef USE_PROJ
/* if necessary, project the searchrect to source coords */
if (msProjectionsDiffer( &(layer->map->projection), &(layer->projection))) {
if (msProjectRect(&layer->projection, &layer->map->projection, &newRect)
!= MS_SUCCESS ) {
msDebug("msContourLayerWhichShapes(%s): unable to reproject map request rectangle into layer projection, canceling.\n", layer->name);
return MS_FAILURE;
}
}
#endif
/* regenerate the raster io */
msConnPoolRelease(&clinfo->ogrLayer, clinfo->hOGRDS);
msLayerClose(&clinfo->ogrLayer);
/* Open the raster source */
if (msContourLayerReadRaster(layer, newRect) != MS_SUCCESS)
return MS_FAILURE;
/* Generate Contour Dataset */
if (msContourLayerGenerateContour(layer) != MS_SUCCESS)
return MS_FAILURE;
GDALClose(clinfo->hDS);
clinfo->hDS = NULL;
free(clinfo->buffer);
/* Open our virtual ogr layer */
if (msLayerOpen(&clinfo->ogrLayer) != MS_SUCCESS)
return MS_FAILURE;
clinfo->ogrLayer.numitems = layer->numitems;
clinfo->ogrLayer.items = CSLDuplicate(layer->items);
return msLayerWhichShapes(&clinfo->ogrLayer, rect, isQuery);
}