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Comment by interpol_p | Hacker News Reader

I still fail to understand your point. I'm trying to educate myself on the N95 but videos of its interaction bear no resemblance to the first iPhone OS.

Putting a touch interface OS on a hardware GPU is not the same as the specific developments I am talking about. The graphics compositor (CoreAnimation / CALayer architecture on iOS), physics-driven animation and one-to-one correspondence with your touch at 60fps was what made the platform unique on its release.

Edit: this is the best video I can find of a 2007 Nokia device with touch interaction: https://youtu.be/YrS1PGj27VI?t=1m4s — the interaction is incredibly high latency and not at all one-to-one like an iPhone. Absolutely none of the innovations I mentioned are present on the Nokia (or if they are, they are not being used to facilitate human interaction with the device in this video).

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I also mentioned Series 90, aka Nokia 7710.

Although I do concede that if it wasn't for iPhone's success, OpenGL ES would probably never had taken off, as Symbian was one of the very few mobile OSes that had some flagship devices with hardware support for it.

Thank you for the specific device (Nokia 7710). I've looked at some videos and I can explain more clearly what I mean.

In the following video https://youtu.be/CUUnnf_gX1s?t=46s you'll see that when the button is tapped, the screen "tears" when the device re-renders its display. I doubt this OS was using the GPU to render and composite its components to the display. It seems more like it is software rendering the UI then passing the entire buffer to the GPU for display.

Notice also that the scrolling on the device is line-by-line rather than per-pixel. It's done to minimise screen redraws but it is exactly the opposite of what made the first iPhone so pleasant to use. The only one-to-one interaction in the Nokia 7710 video is the little sliders being moved by the stylus, but they too flicker when redrawing.

My point wasn't really about whether a phone supported OpenGL. I was pointing out the software design of the graphical compositor used to render and animate the UI, and how every small decision was made in favour of prioritising an immediate reaction to human input.

The only reason I mentioned the iPhone's meagre mobile GPU was to emphasise how iOS was able to produce such low-latency and smooth performance from very low powered hardware.

Yep—smooth scrolling was a famous obsession of Steve Jobs that was emphasized in just about every Apple product where it was feasible, the idea borrowed from one of the fated PARC demos. Little things like this go a long way in building a sense of symbiosis between user and device.

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