Function msDrawVectorLayer

mapdraw.c:782–1065

}

int msDrawVectorLayer(mapObj *map, layerObj *layer, imageObj *image)
{
  int         status, retcode=MS_SUCCESS;
  char        annotate=MS_TRUE;
  shapeObj    shape;
  rectObj     searchrect;
  char        cache=MS_FALSE;
  int         maxnumstyles=1;
  featureListNodeObjPtr shpcache=NULL, current=NULL;
  int nclasses = 0;
  int *classgroup = NULL;
  double minfeaturesize = -1;
  int maxfeatures=-1;
  int featuresdrawn=0;

  if (image)
    maxfeatures=msLayerGetMaxFeaturesToDraw(layer, image->format);
  
  //TODO TBT: draw as raster layer in vector renderers

  annotate = msEvalContext(map, layer, layer->labelrequires);
  if(map->scaledenom > 0) {
    if((layer->labelmaxscaledenom != -1) && (map->scaledenom >= layer->labelmaxscaledenom)) annotate = MS_FALSE;
    if((layer->labelminscaledenom != -1) && (map->scaledenom < layer->labelminscaledenom)) annotate = MS_FALSE;
  }

  /* reset layer pen values just in case the map has been previously processed */
  msClearLayerPenValues(layer);
  
  /* open this layer */
  status = msLayerOpen(layer);
  if(status != MS_SUCCESS) return MS_FAILURE;
  
  /* build item list */
    status = msLayerWhichItems(layer, MS_FALSE, NULL);

  if(status != MS_SUCCESS) {
    msLayerClose(layer);
    return MS_FAILURE;
  }
  
  /* identify target shapes */
  if(layer->transform == MS_TRUE)
    searchrect = map->extent;
  else {
    searchrect.minx = searchrect.miny = 0;
    searchrect.maxx = map->width-1;
    searchrect.maxy = map->height-1;
  }
  
#ifdef USE_PROJ
  if((map->projection.numargs > 0) && (layer->projection.numargs > 0))
    msProjectRect(&map->projection, &layer->projection, &searchrect); /* project the searchrect to source coords */
#endif
    
  status = msLayerWhichShapes(layer, searchrect, MS_FALSE);
  if(status == MS_DONE) { /* no overlap */
    msLayerClose(layer);