preparing assets: which file format appropriate for 160ppi?

Discussion in 'Mac Programming' started by technekai, Apr 17, 2008.

  1. macrumors newbie

    i am preparing assets for an iPhone app built with the SDK. in which format should i save the images, in order to take advantage of the iPhone screen resolution of 160ppi? native Photoshop format is not an option, my programmer does not have it.

    TIFF at 160ppi?

    thank you for your advice,
  2. macrumors 6502

    PNG is the recommended format.

    You should save your images at 72dpi if you want one pixel in the image to correspond to one pixel on the iPhone.
  3. macrumors 601


    I find that PNG generally has better compression than TIF, I only use TIF when I need multiple alpha channels or layers. For graphics productions I also recommend rendering intermediate QuickTime movies using the QuickTime PNG rather than the Animation codec.
  4. macrumors 6502

    Xcode also performs additional (non-lossy) compression on PNGs at compile time, and iPhone OS apparently has an optimised pathway for PNG decompression, so it's a winner all round.

Share This Page