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swiftopengl-eseaglcontext
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Reputation: 93

EAGLContext to UIImage

In objective-C, I was able to render the EAGLContext to UIImage using glReadPixels to read the pixel data from the framebuffer, creating a CGImage using the pixel data, and then retrieving a UIImage from the context.

I am trying a new method in Swift, but it is returning an empty image. I would like to create a GLKView from the EAGLContext, and then use 'snapshot' to get the UIImage. The “myEaglContext” passed into the GLKView constructor has data on it. 

let glkView = GLKView(frame: CGRect(x: 0,y: 0,width: self.frame.size.width,height: self.frame.size.height),context: myEaglContext)

glkView.bindDrawable()
glkView.display()

let image : UIImage = glkView.snapshot

Does anyone know why this approach is not working?

Upvotes: 0

Views: 360

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