Change lines 70-98 of the CropTransformer.php to allow the ability to directly pass coordinates for cropping.

CropTransformer.php

if(!is_array($location)){
  		if ($widthScale > $heightScale) {
				$src_w = round($width * $heightScale);
	
				// Position horizontally in the middle
				if ($location === self::CENTER) {
					$src_x = round(($baseWidth / 2) - (($width / 2) * $heightScale));
	
				// Position at the far right
				} else if ($location === self::RIGHT || $location === self::BOTTOM) {
					$src_x = $baseWidth - $src_w;
				}
	
			// Source height is larger, use width scale as the base
			} else {
				$src_h = round($height * $widthScale);
	
				// Position vertically in the middle
				if ($location === self::CENTER) {
					$src_y = round(($baseHeight / 2) - (($height / 2) * $widthScale));
	
				// Position at the bottom
				} else if ($location === self::RIGHT || $location === self::BOTTOM) {
					$src_y = $baseHeight - $src_h;
				}
			}
		}else{
			list($src_x, $src_y, $src_w, $src_h) = $location;
		}