_php_image_convert  167 gd/gd.c        static void _php_image_convert(INTERNAL_FUNCTION_PARAMETERS, int image_type);
_php_image_convert 4506 gd/gd.c        	_php_image_convert(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_JPG);
_php_image_convert 4516 gd/gd.c        	_php_image_convert(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_PNG);