I was going through https://www.codeandweb.com/texturepacker/tutorials/dynamic-content-scaling-for-corona-sdk to know more about content scaling using sprite-sheets.
I downloaded the attached source code and found out that there was two sets of sprite-sheet images(normal & prefixed @2x) which is fine.
But what I couldn't comprehend was the existence of two sprite-sheet information files( normal & prefixed @2x).
From what I have learned so far, that by using sheetContentWidth & sheetContentHeight, corona automatically fetches the right sprite-sheet image based on the size of the content area screen, provided image suffix was defined in the config file.
So why is there a prefixed(@2x) version of sprite-sheet information file? Is it redundant?