105 lines
2.4 KiB
C#
105 lines
2.4 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using ANX.Framework.NonXNA;
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using ANX.Framework.NonXNA.Development;
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using ANX.Framework.NonXNA.RenderSystem;
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// This file is part of the ANX.Framework created by the
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// "ANX.Framework developer group" and released under the Ms-PL license.
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// For details see: http://anxframework.codeplex.com/license
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namespace ANX.Framework.Graphics
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{
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[PercentageComplete(100)]
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[TestState(TestStateAttribute.TestState.Untested)]
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[Developer("AstrorEnales")]
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public class OcclusionQuery : GraphicsResource, IGraphicsResource
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{
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#region Private
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private bool hasBegun;
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private bool completeCallPending;
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private IOcclusionQuery nativeQuery;
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#endregion
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#region Public
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public bool IsComplete
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{
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get
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{
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return nativeQuery.IsComplete;
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}
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}
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public int PixelCount
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{
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get
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{
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if (this.completeCallPending)
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throw new InvalidOperationException("The status of the query data is unknown. Use the IsComplete " +
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"property to determine if the data is available before attempting to retrieve it.");
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return nativeQuery.PixelCount;
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}
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}
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#endregion
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#region Constructor
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public OcclusionQuery(GraphicsDevice graphicsDevice)
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: base(graphicsDevice)
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{
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var creator = AddInSystemFactory.Instance.GetDefaultCreator<IRenderSystemCreator>();
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nativeQuery = creator.CreateOcclusionQuery();
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}
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~OcclusionQuery()
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{
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Dispose(true);
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}
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#endregion
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#region Begin
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public void Begin()
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{
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if (hasBegun)
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throw new InvalidOperationException("Begin cannot be called again until End is called.");
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if (completeCallPending)
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throw new InvalidOperationException("Begin may not be called on this query object again before IsComplete " +
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"is checked.");
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hasBegun = true;
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completeCallPending = true;
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nativeQuery.Begin();
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}
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#endregion
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#region End
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public void End()
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{
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if (this.hasBegun == false)
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throw new InvalidOperationException("Begin must be called before End can be called.");
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nativeQuery.End();
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}
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#endregion
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#region Dispose
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public override void Dispose()
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{
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Dispose(true);
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}
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protected override void Dispose([MarshalAs(UnmanagedType.U1)] bool disposeManaged)
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{
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if (nativeQuery != null)
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{
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nativeQuery.Dispose();
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nativeQuery = null;
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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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