OMG!! Now we have OpenGLES 3.0 to look forward to

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• hgvyas123 Guru

  September 2013 edited September 2013

  just wondering does we need to recompile and upload our game to appstore to support 64 bit
  
  [edit] or iphone5s ?
  
  

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• john26 Maintainer

  September 2013 edited September 2013

  32-bit will still run
  
  http://www.engadget.com/gallery/iphone-5s/996309/#!slide=996326
  
  Apparently there will be a "seamless developer transition" *ahem*
  

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  http://giderosmobile.com
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• hgvyas123 Guru

  September 2013

  that's the good news
  
  

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• john26 Maintainer

  September 2013 edited September 2013

  What I don't understand is why they haven't redesigned the god awful icons on the iOS 7 home screen. They look like they were scribbled by a 5 year old. The old icons were classy, these look like Microsoft clipart.

  Likes: ar2rsawseen

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• OZApps Guru

  September 2013

  32-bit will still run
  
  http://www.engadget.com/gallery/iphone-5s/996309/#!slide=996326
  
  Apparently there will be a "seamless developer transition" *ahem*
  

  @John, I think you have not understood what my question is.
  
  1. If you use luac with a lua program, you get a compiled lua file (bytecode).
  2. Gideros, Corona compile the source code into bytecode and embed into the app to protect the source from casual browsing.
  3. Lua bytecode is portable, however it is specific to the platform and size, it can be a 32-bit or a 64-bit
  4. If you have brought any compiled library from me, you would get a 32-bit that you need to include with your app and a 64-bit that you need to use for the desktop Gideros player.
  
  Now that the iPoneS will be a 64-bit processor, the luaVM will reject the file stating that it is incompatible.
  
  MacOSX uses 64-bit, windows and mobiles use(d) 32-bit.
  
  So would all of the Lua based apps just fail on the new iPhoneS ?? That is my question.

  twitter: @ozapps | http://www.oz-apps.com | http://howto.oz-apps.com | http://reviewme.oz-apps.com
  Author of Learn Lua for iOS Game Development from Apress ( http://www.apress.com/9781430246626 )
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• john26 Maintainer

  September 2013

  Well, I'd like to hear from the devs, but my guess is the 32-bit program (including Lua VM) will run fine on the new 64 bit processor. The app store has hundreds of thousands of apps many using Lua and/or virtual machines of some sort. If they all break Apple has a problem. I think the new chip will be 100% 32 bit compatible such that any "legacy" 32-bit program will see it as a 32 bit chip. The 64 bit nature of the chip should be entirely hidden from all parts of the app.
  
  It's like the transition 32-64 on PCs. Most PC are now 64 bit but most programs remain 32-bit (some are no longer maintained but in many cases devs see no advantage converting to 64 bit) but I've not heard of any compatibility issues...

  Likes: hgvyas123

  http://giderosmobile.com
  https://github.com/gideros/gideros
  https://www.youtube.com/c/JohnBlackburn1975
  

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• Vramin Member

  September 2013

  I just watched the announcement video last night and he very clearly states that all 32 bit programs will run just fine on the 64 bit processor.

  Likes: hgvyas123

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• john26 Maintainer

  September 2013 edited September 2013

  The real question is whether 64 bit will make any difference to mobile apps. There are several cases where 64 bit helps
  
  1) You need more than 4 Gb RAM
  2) You need to lots do integer arithmetic with 64-bit integers.
  3) Compiler can potentially optimize better due to more registers (not a 64-bit issue per se)
  
  Neither looks greatly relevant to most mobile apps. No device currently has more than 4Gb. Most arithmetic, including games, is done on floating point not integer, and this is on the FPU so 64 bit makes no difference (correct me if I'm wrong). Lua doesn't even support integers! Even if you do need integer arithmetic, how often do you need 64-bit integers? Only for cryptography I think and this is not a common activity on mobile phones...
  
  On the other hand, the Infinity Blade folks say their 64 bit version is better perhaps due to point (3) which is more to do with the new design than 64 vs 32 bit...

  http://giderosmobile.com
  https://github.com/gideros/gideros
  https://www.youtube.com/c/JohnBlackburn1975
  

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• atilim Maintainer

  September 2013 edited September 2013

  @john26 totally agree. I think the only important item here is point #1. IMHO, on PC side, there isn't much performance change between 32-bit and 64-bit applications on 64-bit machines (except highly use of 64-bit integers).
  
  Also http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-September/065480.html -> here it says it will take at least several months to release LLVM backend for 64-bit A7.
  

  http://en.wikipedia.org/wiki/Cytorus

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