使用OpenGL ES 2.0的iOS 360视频

Question

I have an app that uses OpenGL ES 3.0 to play 360 Videos using a sky sphere implementation. I want to use OpenGL ES 2.0 to support more devices.

In ViewController.swift I create the EAGLContext in the method setupContext() and it works with .OpenGLES3 but when I try to use .OpenGLES2 I only see a black screen. There are no error messages and I am unable to discern what API functions are not supported in OpenGL ES 2.0.

context = EAGLContext(API: .OpenGLES3)
EAGLContext.setCurrentContext(context)

How can I use OpenGL ES 2.0 to display 360 videos using a sky sphere? The main implementation is in Skysphere.swift. Thanks.

Sample app is found here: https://github.com/devinshively/TestVideoPlayer

Answer 1

The issue was that OpenGL 3 automatically infers the pixel width and height. To use OpenGL 2 I needed to define the pixel buffer attributes kCVPixelBufferWidthKey and kCVPixelBufferHeightKey. I updated the test repo with the fix.

let pixelBufferAttributes = [kCVPixelBufferPixelFormatTypeKey as String : NSNumber(unsignedInt: kCVPixelFormatType_32BGRA),
                                       kCVPixelBufferWidthKey as String : 1024,
                                      kCVPixelBufferHeightKey as String : 512]