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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  • OCedHrt - Sunday, June 24, 2012 - link

    He missed another important point. All of that was in 3 lbs. Now, the current generation starting from last summer has an external discrete graphics and optical drive connected via a thunderbolt based connector (because Apple had exclusivity) with the laptop being only 2.5 lbs.

    This isn't going to compare to the retina macbook pro though - at 15 inches 4.5 lbs is pretty impressive though I think if Sony wanted to do it they could do 4 lbs or less.
    Reply
  • deathdemon89 - Saturday, June 23, 2012 - link

    I agree completely, I'm a proud owner of the old Z, and even today it doesn't feel the least bit dated. And the 1080p screen is holding up admirably well, with no signs of pixellation at normal viewing distances. This device was truly innovative for its time. I still don't understand why it received such mixed reviews by the press. Reply
  • Spunjji - Monday, June 25, 2012 - link

    Mainly the price. Only Apple are allowed to charge that much for a laptop. Also, only Apple can have hot systems. Repeat ad infinitum. Reply
  • mlambert890 - Wednesday, November 28, 2012 - link

    Really ridiculous comment. I can see you are bitter, as is the other mega z fan, but come on already. I worked for Sony for 5 years and love the company. I have owned probably a dozen Vaios including the top of the line last gen Z (with the SSD RAID)

    Instead of ranting and raving you need to ask yourself *why it is* that "only Apple can charge so much" and why "Anand only gives a free pass to Apple"

    You feel what exactly? That there is some grand conspiracy in play? Do you realize how ridiculous that sounds?

    WHY has Sony *lost the ability to charge a premium*? In other words WHY have they *burned all customer loyalty and good will*? I left the company back in 1999 because I saw the writing on the wall.

    You (and the other Z guy) are no different than any other apologist. Companies dont bleed marketshare and fail to sell cancer curing products (you guys are presenting the Z as "truly revolutionary" right?) for no reason. Sorry to tell you there is no "big conspiracy".

    Sony sells super high priced products into a super commoditized market and then they layer on a CRAP TON of bloatware dragging the machine to a stop, make idiot decisions like the HDMI one, and push proprietary crap *worse* than Apple ever has. All of that into the Wintel space which, sorry to tell you, was *always* driven by the cheapest possible parts at the best possible price.

    The PC industry grew *because it was cheap*. Apple *always* occupied a premium niche. I vividly remember the initial release of the Apple I, the Lisa, the Mac 128. These were all always premium products and the competition at the time (be it Commodore, Atari, Ti, or the wintel ecosystem) *always* captured share by being cheap.

    That may annoy you for some reason, but Apple has pretty much *always* held a core premium audience. The only exception was the period of insanity when Jobs had been pushed out and Scully destroyed the company. Even then, the core fans stayed.

    You two make it sound like poor Sony is a victim because the world doesnt all run out and by the Vaio Z.

    Even *without Apple* Sony would be going under, hate to tell you. Sony's problems are Sony's and the whole is *not* the sum of its parts with a laptop.
    Reply
  • solipsism - Saturday, June 23, 2012 - link

    None of that makes sense and is, in fact, rubbish.

    Sony added 1080p because it was it was popular not because it made sense. You have a 168 PPI display on 13" machine which makes text too small to be a good experience for most users.

    They also didn't use a good quality display or add anything to the SW to make the experience good (unlike what Anand talked about in this review), they just added the single metric that was trending because of HDTVs.

    Blu-ray in a notebook has always been a silly option for most users. There is a reason the BRD adoption failed on PCs and it's not because everyone is stupid... except you. ODDs are long overdue for being removed since they take up 25% of the chassis, require them to placed at an edge reducing over 5" of port real estate and restricting design, require a lot of power, are noisy, more prone to break due to the many moving parts, are slow, are just too expensive to be feasible, and add nothing visually that most users trying to watch a movie can discern.

    Quad-SSDs? Really? That's a sensible solution for a consumer notebook?
    Reply
  • EnzoFX - Saturday, June 23, 2012 - link

    and that really is what people don't get. It isn't just about raw specs. The package needs to be complete, polished, what have you. In this case of high dpi screens, is good scaling support, and Apple did it. Support on the software side is something they never get credit for by the Apple haters. All they can see is numbers and think "I've seen numbers like that before". Reply
  • mabellon - Saturday, June 23, 2012 - link

    No Apple didn't do it. Just like on the iPad, they increased resolution by doubling width and height. Their software simply doesn't scale well to arbitrary higher resolution. If it was done right then Chrome would work out of the box - instead the OS 2x scales everything without increasing resolution/quality.

    To the consumer, the choice means a good experience without breaking apps. But claiming that Apple was successful simply bc of software? HA!
    Reply
  • Ohhmaagawd - Saturday, June 23, 2012 - link

    Did you actually read the retina part of the review?

    Chrome doesn't work right because they do their own text rendering. Read the review. If an app uses the native text rendering, the app will look good (at least the text portion). They will have to update the graphical assets of course.

    BTW, Chrome Dev builds have this issue fixed.

    Windows DPI setting isn't default, so few use or even know about the setting and devs haven't made sure they work properly in the high DPI settings.

    Apple has made a move that will be short-term painful in having apps that aren't updated look a bit fuzzy. But since they made it default, this will force devs to update.
    Reply
  • OCedHrt - Sunday, June 24, 2012 - link

    What do you mean Windows DPI setting isn't default? You can change it in a few clicks, but the same thing applies - if your app does not read the DPI values, then Windows can't help you. This is because windows UI is not vector based (I don't know about now, but older apps definitely not) and many applications back then were coded with hard coded pixel counts.

    When the DPI is changed, windows scales the text but the UI dimensions is controlled by the application implementation.
    Reply
  • KitsuneKnight - Saturday, July 07, 2012 - link

    On Windows, changing the DPI will generally mean a huge amount of applications will become simply unusable.

    On this Retina MBP, the worst case appears to be slightly blurry text (which was quickly updated).

    Apple's solution is a good one, because it does things in a way that should keep existing apps working fine, while allowing future developers to leverage new APIs to take advantage of the increased resolution.
    Reply

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