DynamicIndexBuffer.cs

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using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
 
namespace Microsoft.Xna.Framework.Graphics;
 
public class DynamicIndexBuffer : IndexBuffer, IGraphicsResource, IDynamicGraphicsResource
{
    internal bool _contentLost;
 
    private EventHandler<EventArgs> _003Cbacking_store_003EContentLost;
 
    public bool IsContentLost
    {
        [return: MarshalAs(UnmanagedType.U1)]
        get
        {
            if (!_contentLost)
            {
                _contentLost = _parent.IsDeviceLost;
            }
            return _contentLost;
        }
    }
 
    [SpecialName]
    public virtual event EventHandler<EventArgs> ContentLost
    {
        [MethodImpl(MethodImplOptions.Synchronized)]
        add
        {
            _003Cbacking_store_003EContentLost = (EventHandler<EventArgs>)Delegate.Combine(_003Cbacking_store_003EContentLost, value);
        }
        [MethodImpl(MethodImplOptions.Synchronized)]
        remove
        {
            _003Cbacking_store_003EContentLost = (EventHandler<EventArgs>)Delegate.Remove(_003Cbacking_store_003EContentLost, value);
        }
    }
 
    public unsafe DynamicIndexBuffer(GraphicsDevice graphicsDevice, Type indexType, int indexCount, BufferUsage usage)
    {
        try
        {
            if (indexCount <= 0)
            {
                throw new ArgumentOutOfRangeException("indexCount", FrameworkResources.ResourcesMustBeGreaterThanZeroSize);
            }
            _parent = graphicsDevice;
            uint indexSize = (uint)Marshal.SizeOf(indexType);
            CreateBuffer((uint)indexCount, indexSize, _003CModule_003E.ConvertXnaBufferUsageToDx(usage) | 0x200u, (_D3DPOOL)0);
            graphicsDevice.Resources.AddTrackedObject(this, pComPtr, 0u, _internalHandle, ref _internalHandle);
            return;
        }
        catch
        {
            //try-fault
            Dispose(true);
            throw;
        }
    }
 
    public unsafe DynamicIndexBuffer(GraphicsDevice graphicsDevice, IndexElementSize indexElementSize, int indexCount, BufferUsage usage)
    {
        try
        {
            if (indexCount <= 0)
            {
                throw new ArgumentOutOfRangeException("indexCount", FrameworkResources.ResourcesMustBeGreaterThanZeroSize);
            }
            _parent = graphicsDevice;
            int indexSize = ((indexElementSize == IndexElementSize.SixteenBits) ? 2 : 4);
            CreateBuffer((uint)indexCount, (uint)indexSize, _003CModule_003E.ConvertXnaBufferUsageToDx(usage) | 0x200u, (_D3DPOOL)0);
            graphicsDevice.Resources.AddTrackedObject(this, pComPtr, 0u, _internalHandle, ref _internalHandle);
            return;
        }
        catch
        {
            //try-fault
            Dispose(true);
            throw;
        }
    }
 
    public void SetData<T>(T[] data, int startIndex, int elementCount, SetDataOptions options) where T : struct
    {
        SetData(0, data, startIndex, elementCount, options);
    }
 
    public void SetData<T>(int offsetInBytes, T[] data, int startIndex, int elementCount, SetDataOptions options) where T : struct
    {
        CopyData(offsetInBytes, data, startIndex, elementCount, _003CModule_003E.ConvertXnaSetDataOptionsToDx(options), isSetting: true);
    }
 
    internal override int SaveDataForRecreation()
    {
        return 0;
    }
 
    int IGraphicsResource.SaveDataForRecreation()
    {
        //ILSpy generated this explicit interface implementation from .override directive in SaveDataForRecreation
        return this.SaveDataForRecreation();
    }
 
    internal unsafe override int RecreateAndPopulateObject()
    {
        if (pComPtr != null)
        {
            return -2147467259;
        }
        if (_bufferSize == 0)
        {
            return -2147467259;
        }
        fixed (IDirect3DIndexBuffer9** ptr2 = &pComPtr)
        {
            _D3DFORMAT d3DFORMAT = ((_indexSize == 4) ? ((_D3DFORMAT)102) : ((_D3DFORMAT)101));
            GraphicsDevice parent = _parent;
            IDirect3DDevice9* ptr = parent.pComPtr;
            GraphicsDevice graphicsDevice = parent;
            int num = *(int*)ptr + 108;
            int num2 = ((delegate* unmanaged[Stdcall, Stdcall]<IntPtr, uint, uint, _D3DFORMAT, _D3DPOOL, IDirect3DIndexBuffer9**, void**, int>)(int)(*(uint*)num))((nint)ptr, _bufferSize, graphicsDevice.GetBufferUsage(_usage) | 0x200u, d3DFORMAT, (_D3DPOOL)0, ptr2, null);
            if (num2 >= 0)
            {
                _parent.Resources.AddTrackedObject(this, pComPtr, 0u, _internalHandle, ref _internalHandle);
            }
            return num2;
        }
    }
 
    int IGraphicsResource.RecreateAndPopulateObject()
    {
        //ILSpy generated this explicit interface implementation from .override directive in RecreateAndPopulateObject
        return this.RecreateAndPopulateObject();
    }
 
    internal virtual void SetContentLost([MarshalAs(UnmanagedType.U1)] bool isContentLost)
    {
        _contentLost = isContentLost;
        if (isContentLost)
        {
            raise_ContentLost(this, EventArgs.Empty);
        }
    }
 
    void IDynamicGraphicsResource.SetContentLost([MarshalAs(UnmanagedType.U1)] bool isContentLost)
    {
        //ILSpy generated this explicit interface implementation from .override directive in SetContentLost
        this.SetContentLost(isContentLost);
    }
 
    [SpecialName]
    protected virtual void raise_ContentLost(object value0, EventArgs value1)
    {
        _003Cbacking_store_003EContentLost?.Invoke(value0, value1);
    }
}