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using System;
using System.ComponentModel;
using CoreVideo;
namespace Xamarin.Forms.Platform.MacOS
{
// ReSharper disable once InconsistentNaming
internal class OpenGLViewRenderer : ViewRenderer<OpenGLView, MacOSOpenGLView>
{
CVDisplayLink _displayLink;
public void Display(object sender, EventArgs eventArgs)
{
if (Element.HasRenderLoop)
return;
SetupRenderLoop(true);
}
protected override void Dispose(bool disposing)
{
if (_displayLink != null)
{
_displayLink.Dispose();
_displayLink = null;
if (Element != null)
((IOpenGlViewController)Element).DisplayRequested -= Display;
}
base.Dispose(disposing);
}
protected override void OnElementChanged(ElementChangedEventArgs<OpenGLView> e)
{
if (e.OldElement != null)
((IOpenGlViewController)e.OldElement).DisplayRequested -= Display;
if (e.NewElement != null)
{
//var context = new EAGLContext(EAGLRenderingAPI.OpenGLES2);
//var glkView = new GLKView(RectangleF.Empty) { Context = context, DrawableDepthFormat = GLKViewDrawableDepthFormat.Format24, Delegate = new Delegate(e.NewElement) };
var glkView = new MacOSOpenGLView();
SetNativeControl(glkView);
((IOpenGlViewController)e.NewElement).DisplayRequested += Display;
SetupRenderLoop(false);
}
base.OnElementChanged(e);
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == OpenGLView.HasRenderLoopProperty.PropertyName)
SetupRenderLoop(false);
}
void SetupRenderLoop(bool oneShot)
{
if (_displayLink != null)
return;
if (!oneShot && !Element.HasRenderLoop)
return;
_displayLink = new CVDisplayLink();
//.Create(() =>
//{
// var control = Control;
// var model = Element;
// if (control != null)
// control.Display();
// if (control == null || model == null || !model.HasRenderLoop)
// {
// _displayLink.Invalidate();
// _displayLink.Dispose();
// _displayLink = null;
// }
//});
//_displayLink.(NSRunLoop.Current, NSRunLoop.NSDefaultRunLoopMode);
}
//class Delegate : GLKViewDelegate
//{
// readonly OpenGLView _model;
// public Delegate(OpenGLView model)
// {
// _model = model;
// }
// public override void DrawInRect(GLKView view, RectangleF rect)
// {
// var onDisplay = _model.OnDisplay;
// if (onDisplay == null)
// return;
// onDisplay(rect.ToRectangle());
// }
//}
}
}
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