blob: 07fa997619b3ee8b9ebbbc36b72c537844c3bdeb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
using System;
using System.ComponentModel;
using GLKit;
using OpenGLES;
using Foundation;
using CoreAnimation;
using RectangleF = CoreGraphics.CGRect;
namespace Xamarin.Forms.Platform.iOS
{
internal class OpenGLViewRenderer : ViewRenderer<OpenGLView, GLKView>
{
CADisplayLink _displayLink;
public void Display(object sender, EventArgs eventArgs)
{
if (Element.HasRenderLoop)
return;
SetupRenderLoop(true);
}
protected override void Dispose(bool disposing)
{
if (_displayLink != null)
{
_displayLink.Invalidate();
_displayLink.Dispose();
_displayLink = null;
if (Element != null)
Element.DisplayRequested -= Display;
}
base.Dispose(disposing);
}
protected override void OnElementChanged(ElementChangedEventArgs<OpenGLView> e)
{
if (e.OldElement != null)
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) };
SetNativeControl(glkView);
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 = CADisplayLink.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.AddToRunLoop(NSRunLoop.Current, NSRunLoop.NSRunLoopCommonModes);
}
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());
}
}
}
}
|
