How to resolve GLKView viewport issue in iOS

Question

I am trying to display an image using OpenGL ES in iOS. But image is covering only one quadrant of the screen. How can I show it to full screen?

Perhaps something is wrong with your quad vertices and texture coordinates. — stefos, Jun 01 '16 at 17:08

score 3 · Accepted Answer · edited May 23 '17 at 12:16

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I have found the solution. The problem is with setting the contentScaleFactor of UIView. By default, it is 2.0 for retina displays. So, it should be set to 1.0. Here is the link for more details: UIView ContentScaleFactor

edited May 23 '17 at 12:16

Community

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answered Jun 14 '16 at 08:10

R. Jari

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score 0 · Answer 2 · answered Oct 15 '16 at 18:26

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You can determine that programmatically by checking [UIScreen mainScreen].scale; then setting the glkView.contentScaleFactor. You should not be hard coding a scale value.

_glkView.contentScaleFactor = [UIScreen mainScreen].scale;

answered Oct 15 '16 at 18:26

n6xej

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How to resolve GLKView viewport issue in iOS

2 Answers2