Function msEmbedScalebar

mapscale.c:342–454

}

int msEmbedScalebar(mapObj *map, imageObj *img)
{
  int l,index;
  pointObj point;
  imageObj *image = NULL;
  rendererVTableObj *renderer = MS_MAP_RENDERER(map);
  symbolObj *embededSymbol;
  
  if( ! renderer ) {
	  msSetError(MS_MISCERR,"unsupported outputformat","msEmbedScalebar()");
	  return MS_FAILURE;
  }
  index = msGetSymbolIndex(&(map->symbolset), "scalebar", MS_FALSE);
  if(index != -1)
	  msRemoveSymbol(&(map->symbolset), index); /* remove cached symbol in case the function is called multiple
											times with different zoom levels */

  if((embededSymbol=msGrowSymbolSet(&map->symbolset)) == NULL)
    return MS_FAILURE;
  map->symbolset.numsymbols++;
  
  image = msDrawScalebar(map);
  if(!image) {
	  msSetError(MS_RENDERERERR,"failed to create scalebar image","msEmbedScalebar()");
	  return MS_FAILURE;
  }
  embededSymbol->pixmap_buffer = calloc(1,sizeof(rasterBufferObj));
  MS_CHECK_ALLOC(embededSymbol->pixmap_buffer, sizeof(rasterBufferObj), MS_FAILURE);

  if(MS_SUCCESS != renderer->getRasterBufferCopy(image,embededSymbol->pixmap_buffer)) {
	  return MS_FAILURE;
  }
  
  embededSymbol->type = MS_SYMBOL_PIXMAP; /* intialize a few things */
  embededSymbol->name = msStrdup("scalebar");  
  embededSymbol->sizex = embededSymbol->pixmap_buffer->width;
  embededSymbol->sizey = embededSymbol->pixmap_buffer->height;
  if(map->scalebar.transparent) {
      embededSymbol->transparent = MS_TRUE;
      embededSymbol->transparentcolor = 0;
  }

  switch(map->scalebar.position) {
  case(MS_LL):
    point.x = MS_NINT(embededSymbol->pixmap_buffer->width/2.0);
    point.y = map->height - MS_NINT(embededSymbol->pixmap_buffer->height/2.0);
    break;
  case(MS_LR):
    point.x = map->width - MS_NINT(embededSymbol->pixmap_buffer->width/2.0);
    point.y = map->height - MS_NINT(embededSymbol->pixmap_buffer->height/2.0);
    break;
  case(MS_LC):
    point.x = MS_NINT(map->width/2.0);
    point.y = map->height - MS_NINT(embededSymbol->pixmap_buffer->height/2.0);
    break;
  case(MS_UR):
    point.x = map->width - MS_NINT(embededSymbol->pixmap_buffer->width/2.0);
    point.y = MS_NINT(embededSymbol->pixmap_buffer->height/2.0);