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Refactor IID logic into marshaller type
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Sergio0694 committed Sep 29, 2024
1 parent da98a03 commit 2776383
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Showing 4 changed files with 70 additions and 57 deletions.
2 changes: 1 addition & 1 deletion src/ComputeSharp.UI/ComputeSharp.UI.projitems
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Expand Up @@ -17,7 +17,7 @@
<Compile Include="$(MSBuildThisFileDirectory)Extensions\IDXGIAdapterExtensions.cs" />
<Compile Include="$(MSBuildThisFileDirectory)Extensions\SemaphoreSlimExtensions.cs" />
<Compile Include="$(MSBuildThisFileDirectory)Helpers\DynamicResolutionManager.cs" />
<Compile Include="$(MSBuildThisFileDirectory)Helpers\SwapChainManager.IID.cs" />
<Compile Include="$(MSBuildThisFileDirectory)Helpers\SwapChainPanelNativeMarshaller.cs" />
<Compile Include="$(MSBuildThisFileDirectory)Helpers\SwapChainManager.cs" />
<Compile Include="$(MSBuildThisFileDirectory)Helpers\SwapChainManager.Rendering.cs" />
<Compile Include="$(MSBuildThisFileDirectory)IFrameRequestQueue.cs" />
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54 changes: 0 additions & 54 deletions src/ComputeSharp.UI/Helpers/SwapChainManager.IID.cs

This file was deleted.

3 changes: 1 addition & 2 deletions src/ComputeSharp.UI/Helpers/SwapChainManager.cs
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Expand Up @@ -20,7 +20,6 @@
using Windows.System;
using Windows.UI.Xaml.Controls;
#endif
using WinRT;

#if WINDOWS_UWP
namespace ComputeSharp.Uwp.Helpers;
Expand Down Expand Up @@ -233,7 +232,7 @@ public SwapChainManager(TOwner owner, GraphicsDevice device)
// IDXGISwapChain reference just created and set that as the swap chain panel to use.
fixed (ISwapChainPanelNative** swapChainPanelNative = this.swapChainPanelNative)
{
((IWinRTObject)owner).NativeObject.TryAs(*IID_ISwapChainPanelNative, out *(nint*)swapChainPanelNative).Assert();
SwapChainPanelNativeMarshaller.GetNativeObject(owner, swapChainPanelNative);
}

// Get the underlying ID3D12Device in use
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68 changes: 68 additions & 0 deletions src/ComputeSharp.UI/Helpers/SwapChainPanelNativeMarshaller.cs
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@@ -0,0 +1,68 @@
using System;
using System.Runtime.CompilerServices;
using ComputeSharp.Core.Extensions;
using ComputeSharp.Win32;
#if !WINDOWS_UWP
using Microsoft.UI.Xaml.Controls;
#endif
using System.Runtime.InteropServices;
#if WINDOWS_UWP
using Windows.UI.Xaml.Controls;
#endif
using WinRT;

#if WINDOWS_UWP
namespace ComputeSharp.Uwp.Helpers;
#else
namespace ComputeSharp.WinUI.Helpers;
#endif

/// <summary>
/// A helper type to handle marshalling <see cref="SwapChainPanel"/> objects for native interop.
/// </summary>
internal static unsafe class SwapChainPanelNativeMarshaller
{
/// <summary>
/// Retrieves the underlying <see cref="ISwapChainPanelNative"/> object for an input <see cref="SwapChainPanel"/> instance.
/// </summary>
/// <param name="managedObject">The input <see cref="SwapChainPanel"/> instance to unwrap.</param>
/// <param name="nativeObject">A pointer to the resulting <see cref="ISwapChainPanelNative"/> object to retrieve.</param>
public static void GetNativeObject(SwapChainPanel managedObject, ISwapChainPanelNative** nativeObject)
{
#if WINDOWS_UWP
ReadOnlySpan<byte> data =
[
0xD2, 0x19, 0x2F, 0xF9,
0xDE, 0x3A,
0xA6, 0x45,
0xA2,
0x0C,
0xF6,
0xF1,
0xEA,
0x90,
0x55,
0x4B
];
#else
ReadOnlySpan<byte> data =
[
0xB8, 0xD0, 0xAA, 0x63,
0x24, 0x7C,
0xFF, 0x40,
0x85,
0xA8,
0x64,
0x0D,
0x94,
0x4C,
0xC3,
0x25
];
#endif
// Unwrap and get the 'ISwapChainPanelNative' interface with the right IID depending on the UI framework
((IWinRTObject)managedObject).NativeObject.TryAs(
iid: Unsafe.As<byte, Guid>(ref MemoryMarshal.GetReference(data)),
ppv: out *(nint*)nativeObject).Assert();
}
}

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