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#region License
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/* FNA - XNA4 Reimplementation for Desktop Platforms
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* Copyright 2009-2020 Ethan Lee and the MonoGame Team
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*
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* Released under the Microsoft Public License.
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* See LICENSE for details.
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*/
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#endregion
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#region Using Statements
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using System;
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using System.Collections.Generic;
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#endregion
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namespace Microsoft.Xna.Framework.Graphics
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{
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public abstract class GraphicsResource : IDisposable
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{
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#region Public Properties
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public GraphicsDevice GraphicsDevice
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{
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get
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{
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return graphicsDevice;
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}
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internal set
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{
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if (graphicsDevice == value)
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{
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return;
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}
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/* VertexDeclaration objects can be bound to
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* multiple GraphicsDevice objects during their
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* lifetime. But only one GraphicsDevice should
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* retain ownership.
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*/
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if (graphicsDevice != null && selfReference != null)
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{
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graphicsDevice.RemoveResourceReference(selfReference);
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selfReference = null;
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}
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graphicsDevice = value;
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selfReference = new WeakReference(this);
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graphicsDevice.AddResourceReference(selfReference);
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}
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}
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public bool IsDisposed
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{
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get;
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private set;
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}
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public string Name
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{
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get;
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set;
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}
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public Object Tag
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{
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get;
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set;
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}
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#endregion
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#region Private Variables
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private WeakReference selfReference;
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private GraphicsDevice graphicsDevice;
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#endregion
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#region Disposing Event
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public event EventHandler<EventArgs> Disposing;
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#endregion
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#region Internal Constructor and Deconstructor
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internal GraphicsResource()
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{
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}
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~GraphicsResource()
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{
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// FIXME: We really should call Dispose() here! -flibit
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}
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#endregion
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#region Public Dispose Method
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public void Dispose()
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{
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// Dispose of unmanaged objects as well
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Dispose(true);
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// Since we have been manually disposed, do not call the finalizer on this object
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GC.SuppressFinalize(this);
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}
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#endregion
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#region Public Methods
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public override string ToString()
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{
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return string.IsNullOrEmpty(Name) ? base.ToString() : Name;
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}
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#endregion
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#region Internal Methods
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/// <summary>
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/// Called before the device is reset. Allows graphics resources to
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/// invalidate their state so they can be recreated after the device reset.
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/// Warning: This may be called after a call to Dispose() up until
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/// the resource is garbage collected.
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/// </summary>
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internal protected virtual void GraphicsDeviceResetting()
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{
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}
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#endregion
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#region Protected Dispose Method
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/// <summary>
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/// The method that derived classes should override to implement disposing of
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/// managed and native resources.
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/// </summary>
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/// <param name="disposing">True if managed objects should be disposed.</param>
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/// <remarks>
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/// Native resources should always be released regardless of the value of the
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/// disposing parameter.
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/// </remarks>
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protected virtual void Dispose(bool disposing)
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{
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if (!IsDisposed)
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{
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// Do not trigger the event if called from the finalizer
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if (disposing && Disposing != null)
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{
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Disposing(this, EventArgs.Empty);
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}
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// Remove from the list of graphics resources
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if (graphicsDevice != null && selfReference != null)
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{
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graphicsDevice.RemoveResourceReference(selfReference);
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selfReference = null;
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}
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IsDisposed = true;
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}
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}
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#endregion
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}
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}
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