Achieving Retina

To make the MacBook Pro’s Retina Display a reality Apple had to work with panel vendors to build the panels it wanted at a reasonable cost, as well as deliver the software necessary to support insanely high resolutions. There was another problem Apple faced in making the rMBP a reality: the display pipeline of the GPUs Apple wanted to use didn't officially support scaling to the resolution Apple demanded of them. Let me explain.

All modern GPUs have fixed function scaling hardware that is used to efficiently scale between resolutions. A scaler either in your GPU or in your display panel is what lets you run non-native resolutions at full screen on your LCD (e.g. running 1680 x 1050 on a 1920 x 1080 panel). None of the GPUs used in the Retina Display MacBook Pro officially support fixed-function scaling of 3840 x 2400 or 3360 x 2100 to 2880 x 1800 however. Modern day GPUs are tested against 2560 x 1440 and 2560 x 1600, but not this particular 5MP resolution. Even 4K resolution support isn’t widespread among what’s available today. Rather than wait for updated hardware and/or validation, Apple took matters into its own hands and built its own GPU accelerated scaling routines for these higher resolutions. Fixed function hardware is almost always more efficient from a performance and power standpoint, which is why there’s some additional performance loss in these scaled resolution modes. 

What’s even crazier is Apple wasn’t pleased with the difference in baseline filtering quality between the Intel HD 4000 and NVIDIA GeForce GT 650M GPUs. As the Retina Display MacBook Pro would have to regularly switch between GPUs, Apple wanted to ensure a consistently good experience regardless of which GPU was active. There are a lot of filtering operations at work when doing all of this resolution scaling, so rather than compromise user experience Apple simply wrote its own default filtering routines. Since you want your upscale and downscale quality to be identical, Apple had to roll its own implementation on both. Apple’s obsessive attention to detail really made it possible to pull all of this off. It’s just insane to think about.

The Software Side of Retina: Making it All Work Driving the Retina Display: A Performance Discussion
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  • orthorim - Wednesday, June 27, 2012 - link

    A very high resolution display is not a retina display - totally different thing.

    Retina is a special mode where each logical pixel is made up of 4 physical pixels, and special support for fonts and images.

    It's a huge step to go from 1:1 logical : physical pixels to a different factor. It's like bitmap based fonts vs. points-based vector fonts.

    Maybe a lot of PC manufacturers just don't get that?
  • vegemeister - Monday, July 2, 2012 - link

    Apple is not using a PPI independent UI for their high-res displays though. There's a separate set of assets at 2x resolution, and programs that don't acknowledge that they're rendering at 2x resolution get upscaled.

    A real PPI independent UI, such as Gnome 2, uses vector resources for everything and allows applications to query the PPI of the display so they can render at appropriate dimensions.
  • maraboshi - Saturday, June 30, 2012 - link

    and still that was FAIL because it runs Windows and not a brilliant OS like the Apple one...when will you stupid Apple haters will understand the fucking difference?????
  • gbanfalvi - Sunday, July 1, 2012 - link

    I have it. It's a piece of crap. It feels like they just stuffed everything they could in this device without thinking.

    The pads on the bottom fell of from the heat.
    The battery died seven months in.
    The trackpad starts glitching regularly (not to mention it's terrible in general).
    The 1080p screen gets lines across it.
    The laptop overheats when I put it in speed mode.

    Evidence: https://dl.dropbox.com/u/245279/Photos/Photo%20201...
  • azaat07 - Friday, July 13, 2012 - link

    Hole in your hyperbole...

    Only option is Intel Graphics 4000, shared memory.

    Intel 4k graphics are on par with 2007 discrete.

    Andrew
  • woodsielord - Sunday, July 15, 2012 - link

    I have the said computer. I bought it with very high expectations, and the screen is still amazing, but the rest of the hardware keeps causing trouble. I have lived without my computer 3+ months due to repairs, and currently I'm typing this from my girlfriend's Zenbook (which, on the other hand, is zero problems and all play).

    The lack of international Sony support and the proclimity to hardware failure rule out Sony of all my future purchases. Many times I said to myself that I should have bought a MBP instead. If Sony stopped spewing forth so many products and instead tended to the details of flagship products and cared about its customers, it might have worked.
  • mark3785 - Saturday, September 8, 2012 - link

    Ok, I'll play the fanboy…

    This is where Apple haters really get pissed (and as an Apple fan from the mid 80s (and a loyalist from the 90 days from bankruptcy days) (if I'm playing the fanboi thing I may as well go whole hog) I really start to chuckle).

    The MacBook Pro with retina display is proof positive that Apple can do things that the windows community can't because Apple has control of both sides of the coin, the hardware and the OS, plus (and this is a really huge plus) they have some very smart people working for them. It's one thing to put a hires display on a computer and an entirely different thing to make that display resolution independent. Sony may have come out with a hires laptop back in 2010, but they didn't do anything interesting with it.

    Eventually 2880x1800 will be run of the mill and higher resolutions will start to dominate. It isn't the number of pixels, it's how the system uses them to it's best advantage. This is (hopefully) the beginning of a new trend.

    BTW, one helluva review! Reviews are boring, though comforting when they state the obvious (yes, you bought a nifty machine, pat on the head) but a review this informative and complete just reinvigorates my interest in the hobby.
  • Targon - Saturday, June 23, 2012 - link

    You need to look at the different price points that machines are sold for before you make statements like that. Most manufacturers see far greater volumes in the $500 range than they see in the $1500+ range, and it is that range that the majority of consumers look when it comes to buying a computer, either desktop or laptop.

    The area that manufacturers SHOULD be moving in is to make the move to a 1920x1080 display across their entire range of 14 inch and greater machines as the norm, rather than as an extra feature that people need to pay extra for if you are in the $450+ price range. Higher resolutions should be offered as the norm for higher end laptop displays. Until that happens, the PC side of the industry will seem to be inferior when it comes to display technology.

    If you think about it, display technologies have been fairly stagnant except from Apple, and we have not seen an aggressive attempt to improve what we see out there. 1920x1080 displays have been the norm for too long, and going to 1920x1200 isn't enough.
  • OCedHrt - Sunday, June 24, 2012 - link

    Check out the new Sony TT
  • vegemeister - Monday, July 2, 2012 - link

    1920x1080 should be the norm for 11".

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