code: function TbsPicGetDim_Drawings($Txt, $Pos, $dim_inner) {
  
  		if ($dim_inner===false) return false;
  		if (strpos($this->TBS->OtbsCurrFile, 'xl/drawings/')!==0) return false;
  
  		$cx = $dim_inner['wv'];
  		$cy = $dim_inner['hv'];
  
  		$loc = clsTbsXmlLoc::FindStartTag($Txt, 'xdr:twoCellAnchor', $Pos, false);
  		if ($loc===false) return false;
  		$loc = clsTbsXmlLoc::FindStartTag($Txt, 'xdr:to', $loc->PosBeg, true);
  		if ($loc===false) return false;
  		$p = $loc->PosBeg;
  
  		$res = array();
  
  		$loc = clsTbsXmlLoc::FindElement($Txt, 'xdr:colOff', $p, true);
  		if ($loc===false) return false;
  		$res['wb'] = $loc->GetInnerStart();
  		$res['wl'] = $loc->GetInnerLen();
  		$res['wu'] = '';
  		$res['wv'] = $cx;
  		$res['wt'] = $loc->GetInnerSrc();
  		$res['wo'] = intval($res['wt']) - $cx;
  
  		$loc = clsTbsXmlLoc::FindElement($Txt, 'xdr:rowOff', $p, true);
  		if ($loc===false) return false;
  		$res['hb'] = $loc->GetInnerStart();
  		$res['hl'] = $loc->GetInnerLen();
  		$res['hu'] = '';
  		$res['hv'] = $cy;
  		$res['ht'] = $loc->GetInnerSrc();
  		$res['ho'] = intval($res['ht']) - $cy;
  
  		$res['r'] = ($res['hv']==0) ? 0.0 : $res['wv']/$res['hv']; // ratio W/H;
  		$res['dec'] = 0;
  		$res['cpt'] = 12700;
  
  		return $res;
  
  	}
docs: Get Dim in a OpenXML Drawing (pictures in an XLSX)