Function msGetMarkerSize

mapsymbol.c:588–658

** Returns the size, in pixels, of a marker symbol defined by a specific style and scalefactor. Used for annotation ** layer collision avoidance. A marker is made up of a number of styles so the calling code must either do the looping ** itself or call this function for the bottom style which should be the largest. */

** itself or call this function for the bottom style which should be the largest.
*/
int msGetMarkerSize(symbolSetObj *symbolset, styleObj *style, int *width, int *height, double scalefactor)
{  
  rectObj rect;
  int size;
  symbolObj *symbol;
  *width = *height = 0; /* set a starting value */

  if(style->symbol > symbolset->numsymbols || style->symbol < 0) return(MS_FAILURE); /* no such symbol, 0 is OK */

  if(style->symbol == 0) { /* single point */
    *width = 1;
    *height = 1;
    return(MS_SUCCESS);
  }
  
  symbol = symbolset->symbol[style->symbol];
  if(style->size == -1) {
      size = MS_NINT( msSymbolGetDefaultSize(symbol) * scalefactor );
  }
  else
      size = MS_NINT(style->size*scalefactor);
  size = MS_MAX(size, style->minsize);
  size = MS_MIN(size, style->maxsize);

  switch(symbol->type) {  
   
#ifdef USE_GD_FT
  case(MS_SYMBOL_TRUETYPE):
	if(!symbol->full_font_path) {
		char *font = msLookupHashTable(&(symbolset->fontset->fonts),symbol->font);
		if(!font) {
			msSetError(MS_MISCERR,"font (%s) not found in fontset","msGetMarkerSize()",symbol->font);
			return(MS_FAILURE);
		}
		symbol->full_font_path =  msStrdup(font);
	}
    if(msGetTruetypeTextBBox(MS_MAP_RENDERER(symbolset->map),symbol->full_font_path,size,symbol->character,&rect,NULL) != MS_SUCCESS) 
      return(MS_FAILURE);

    *width = (int) MS_MAX(*width, rect.maxx - rect.minx);
    *height = (int) MS_MAX(*height, rect.maxy - rect.miny);

    break;
#endif

  case(MS_SYMBOL_PIXMAP): 
    if(!symbol->pixmap_buffer) {
        msSetError(MS_MISCERR,"msGetMarkerSize() called on unloaded pixmap symbol, this is a bug in mapserver itself","msGetMArkerSize()");
        return MS_FAILURE;
    }
    if(size == 1) {        
      *width = MS_MAX(*width, symbol->pixmap_buffer->width);
      *height = MS_MAX(*height, symbol->pixmap_buffer->height);
    } else {
      *width = MS_MAX(*width, MS_NINT((size/symbol->pixmap_buffer->height) * symbol->pixmap_buffer->width));
      *height = MS_MAX(*height, size);
    }
    break;