ios 8 opengl es 1.1 discontinued?

Question

We are about to launch a title on the iOS appstore, and we've just recently found that it does not work on iOS 8. The game loads to a black screen, however everything else apepars to be working (music can be heard, it reacts to touchscreen, just nothing on the display).

Our engine is quite old and uses OpenGL ES 1.1. I'm now convinced this is the issue, as I've tried another (old) tutorial that renders a black screen.

I've looked online for any sort of discussion about this, but can't seem to find anything. Does anyone have any 1.1 apps out there that they can confirm have either stopped working, or do work?

I'm now looking at the task of updating the engine to 2.0, which is no small feat considering the size of the project, and the fact we're due to launch very shortly. It wouldn't make sense that Apple would just drop support for 1.1 without saying anything, so I'm hoping i'm mistaken in this.

Answer 1

I had the same problem. The fix was - NOT to addSubview

//[self.window addSubview:glView]; // this produces black screen on ios8 devices

[self setView: glView];

Another trick about ios8 is that for a landscape App this code

const CGRect r = [[UIScreen mainScreen] bounds];

returns landscape screen size. For iOS <8 it was always portrait screen size. So now I am using max(x,y) for X and min(x,y) for Y.

Answer 2

OK, I've made some progress. In answer to my question, OpenGL ES 1.1 is NOT discontinued.

I don't know what's changed since iOS 8, but certainly some code doesn't work anymore. I've managed to make some headway by replacing my main app delegate and GL Viewcontroller with one off a tutorial, and it's now rendering, albeit on half the screen and skewed.

So to confirm, 1.1 is fine, it's an issue with my code.

Answer 3

I fixed an issue similarly described here by changing CGFloats to GLfloats (This includes CGPoints because they use CGFloats.) This has nothing to do with OpenGLES 1.1 or 2.0 since I was having the same issue in both of them.

The issue was that OpenGL was that CGfloats are a typedef of float on 32-bit devices while they are a typedef of double on 64-bit devices. GLfloats are provided for exactly this purpose to solve this issue. GLKVector2 is also provided by apple to solve this problem between 32 and 64-bit devices.