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<Type Name="OpenGLView" FullName="Xamarin.Forms.OpenGLView">
<TypeSignature Language="C#" Value="public sealed class OpenGLView : Xamarin.Forms.View, Xamarin.Forms.IOpenGlViewController" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi sealed beforefieldinit OpenGLView extends Xamarin.Forms.View implements class Xamarin.Forms.IElementController, class Xamarin.Forms.IOpenGlViewController, class Xamarin.Forms.IViewController, class Xamarin.Forms.IVisualElementController" />
<AssemblyInfo>
<AssemblyName>Xamarin.Forms.Core</AssemblyName>
<AssemblyVersion>1.0.0.0</AssemblyVersion>
<AssemblyVersion>1.1.0.0</AssemblyVersion>
<AssemblyVersion>1.2.0.0</AssemblyVersion>
<AssemblyVersion>1.3.0.0</AssemblyVersion>
<AssemblyVersion>1.4.0.0</AssemblyVersion>
<AssemblyVersion>1.5.0.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Base>
<BaseTypeName>Xamarin.Forms.View</BaseTypeName>
</Base>
<Interfaces>
<Interface>
<InterfaceName>Xamarin.Forms.IOpenGlViewController</InterfaceName>
</Interface>
</Interfaces>
<Attributes>
<Attribute>
<AttributeName>Xamarin.Forms.RenderWith(typeof(Xamarin.Forms.Platform._OpenGLViewRenderer))</AttributeName>
</Attribute>
</Attributes>
<Docs>
<summary>A <see cref="T:Xamarin.Forms.View" /> that displays OpenGL content.</summary>
<remarks>
<para>
<see cref="T:Xamarin.Forms.OpenGLView" />s are easiest to program using Shared Projects, in which case the reference to OpenTK is straightforward. The following example shows a simple OpenGL app with a render loop:</para>
<example>
<code lang="C#"><![CDATA[
using Xamarin.Forms;
using OpenTK.Graphics.ES30;
namespace opengl
{
public class OpenGLPage : ContentPage
{
float red, green, blue;
public OpenGLPage ()
{
Title = "OpenGL";
var view = new OpenGLView { HasRenderLoop = true };
var toggle = new Switch { IsToggled = true };
var button = new Button { Text = "Display" };
view.HeightRequest = 300;
view.WidthRequest = 300;
view.OnDisplay = r => {
GL.ClearColor (red, green, blue, 1.0f);
GL.Clear ((ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit));
red += 0.01f;
if (red >= 1.0f)
red -= 1.0f;
green += 0.02f;
if (green >= 1.0f)
green -= 1.0f;
blue += 0.03f;
if (blue >= 1.0f)
blue -= 1.0f;
};
toggle.Toggled += (s, a) => {
view.HasRenderLoop = toggle.IsToggled;
};
button.Clicked += (s, a) => view.Display ();
var stack = new StackLayout {
Padding = new Size (20, 20),
Children = {view, toggle, button}
};
Content = stack;
}
}
}
]]></code>
</example>
<para>
<img href="OpenGL.Example.png" />
</para>
</remarks>
</Docs>
<Members>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public OpenGLView ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor() cil managed" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyVersion>1.0.0.0</AssemblyVersion>
<AssemblyVersion>1.1.0.0</AssemblyVersion>
<AssemblyVersion>1.2.0.0</AssemblyVersion>
<AssemblyVersion>1.3.0.0</AssemblyVersion>
<AssemblyVersion>1.4.0.0</AssemblyVersion>
<AssemblyVersion>1.5.0.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Parameters />
<Docs>
<summary>Creates a new <see cref="T:Xamarin.Forms.OpenGLView" /> object with default values.</summary>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="Display">
<MemberSignature Language="C#" Value="public void Display ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig instance void Display() cil managed" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>1.0.0.0</AssemblyVersion>
<AssemblyVersion>1.1.0.0</AssemblyVersion>
<AssemblyVersion>1.2.0.0</AssemblyVersion>
<AssemblyVersion>1.3.0.0</AssemblyVersion>
<AssemblyVersion>1.4.0.0</AssemblyVersion>
<AssemblyVersion>1.5.0.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Called prior to rendering.</summary>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="HasRenderLoop">
<MemberSignature Language="C#" Value="public bool HasRenderLoop { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance bool HasRenderLoop" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyVersion>1.0.0.0</AssemblyVersion>
<AssemblyVersion>1.1.0.0</AssemblyVersion>
<AssemblyVersion>1.2.0.0</AssemblyVersion>
<AssemblyVersion>1.3.0.0</AssemblyVersion>
<AssemblyVersion>1.4.0.0</AssemblyVersion>
<AssemblyVersion>1.5.0.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Docs>
<summary>Whether this <see cref="T:Xamarin.Forms.OpenGLView" /> has a custom rendering loop.</summary>
<value>To be added.</value>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="HasRenderLoopProperty">
<MemberSignature Language="C#" Value="public static readonly Xamarin.Forms.BindableProperty HasRenderLoopProperty;" />
<MemberSignature Language="ILAsm" Value=".field public static initonly class Xamarin.Forms.BindableProperty HasRenderLoopProperty" />
<MemberType>Field</MemberType>
<AssemblyInfo>
<AssemblyVersion>1.0.0.0</AssemblyVersion>
<AssemblyVersion>1.1.0.0</AssemblyVersion>
<AssemblyVersion>1.2.0.0</AssemblyVersion>
<AssemblyVersion>1.3.0.0</AssemblyVersion>
<AssemblyVersion>1.4.0.0</AssemblyVersion>
<AssemblyVersion>1.5.0.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>Xamarin.Forms.BindableProperty</ReturnType>
</ReturnValue>
<Docs>
<summary>Identifies the <see cref="P:Xamarin.Forms.OpenGLView.HasRenderLoop" /> bindable property.</summary>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="OnDisplay">
<MemberSignature Language="C#" Value="public Action<Xamarin.Forms.Rectangle> OnDisplay { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance class System.Action`1<valuetype Xamarin.Forms.Rectangle> OnDisplay" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyVersion>1.0.0.0</AssemblyVersion>
<AssemblyVersion>1.1.0.0</AssemblyVersion>
<AssemblyVersion>1.2.0.0</AssemblyVersion>
<AssemblyVersion>1.3.0.0</AssemblyVersion>
<AssemblyVersion>1.4.0.0</AssemblyVersion>
<AssemblyVersion>1.5.0.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Action<Xamarin.Forms.Rectangle></ReturnType>
</ReturnValue>
<Docs>
<summary>Overridden to create a custom rendering loop.</summary>
<value>To be added.</value>
<remarks>
<para>When overridden, creates a custom renderer: </para>
<example>
<code lang="C#"><![CDATA[
var view = new OpenGLView { HasRenderLoop = true };
view.OnDisplay = r => {
GL.ClearColor (red, green, blue, 1.0f);
GL.Clear ((ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit));
red += 0.01f;
if (red >= 1.0f)
red -= 1.0f;
green += 0.02f;
if (green >= 1.0f)
green -= 1.0f;
blue += 0.03f;
if (blue >= 1.0f)
blue -= 1.0f;
};
]]></code>
</example>
</remarks>
</Docs>
</Member>
</Members>
</Type>
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