Resize images by sort or counter?

Question

1C-Bitrix

Good time, I'm collecting a
photo gallery:
all the photos are cut in 500x500, but I need 4 photos and 8 photos to be cut in a different resolution ... 500x900.
I do not understand how to specify this to the resizer.

I use a normal resizer in result_modifier:

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();

foreach($arResult["ITEMS"] as $cell=>$arItem){

  if($arItem["PREVIEW_PICTURE"]['ID']){
    $file = CFile::ResizeImageGet($arItem["PREVIEW_PICTURE"]['ID'],array("width" => 500, "height" => 500), BX_RESIZE_IMAGE_EXACT, true);
    $arResult["ITEMS"][$cell]["PREVIEW_PICTURE"]['WIDTH'] = $file['width'];
    $arResult["ITEMS"][$cell]["PREVIEW_PICTURE"]['HEIGHT'] = $file['height'];
    $arResult["ITEMS"][$cell]["PREVIEW_PICTURE"]['SRC'] = $file['src'];
  }

  /*кеш*/
  if($file['src'])
      $file['src'] = \CUtil::GetAdditionalFileURL($file['src'], true);
      $arItem['PREVIEW_PICTURE'] = array_change_key_case($file, CASE_UPPER);

}

Answer 1

The most obvious thing is to make an array with the required dimensions for each image and take the dimensions from there.