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Hooking via VTable

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Minizbot2012 2020-01-18 13:18:28 -05:00
parent f3bdea3c43
commit 17c18300b2
2 changed files with 95 additions and 7 deletions
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89
Dalamud/Game/Internal/DXGI/DXHookD3D11.cs Normal file
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@ -0,0 +1,89 @@
using SharpDX.Direct3D;
using SharpDX.Direct3D11;
using SharpDX.DXGI;
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
namespace Dalamud.Game.Internal.DXGI
{
public class DXHookD3D11
{
const int DXGI_SWAPCHAIN_METHOD_COUNT = 18;
const int D3D11_DEVICE_METHOD_COUNT = 43;
public static SharpDX.DXGI.SwapChainDescription CreateSwapChainDescription(IntPtr renderForm)
{
return new SharpDX.DXGI.SwapChainDescription
{
BufferCount = 1,
Flags = SharpDX.DXGI.SwapChainFlags.None,
IsWindowed = true,
ModeDescription = new SharpDX.DXGI.ModeDescription(100, 100, new Rational(60, 1), SharpDX.DXGI.Format.R8G8B8A8_UNorm),
OutputHandle = renderForm,
SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0),
SwapEffect = SharpDX.DXGI.SwapEffect.Discard,
Usage = SharpDX.DXGI.Usage.RenderTargetOutput
};
}
protected IntPtr[] GetVTblAddresses(IntPtr pointer, int numberOfMethods)
{
return GetVTblAddresses(pointer, 0, numberOfMethods);
}
protected IntPtr[] GetVTblAddresses(IntPtr pointer, int startIndex, int numberOfMethods)
{
List<IntPtr> vtblAddresses = new List<IntPtr>();
IntPtr vTable = Marshal.ReadIntPtr(pointer);
for (int i = startIndex; i < startIndex + numberOfMethods; i++)
vtblAddresses.Add(Marshal.ReadIntPtr(vTable, i * IntPtr.Size)); // using IntPtr.Size allows us to support both 32 and 64-bit processes
return vtblAddresses.ToArray();
}
List<IntPtr> _d3d11VTblAddresses = null;
List<IntPtr> _dxgiSwapChainVTblAddresses = null;
#region Internal device resources
SharpDX.Direct3D11.Device _device;
SharpDX.DXGI.SwapChain _swapChain;
SharpDX.Windows.RenderForm _renderForm;
#endregion
#region Main device resources
public SharpDX.Windows.RenderForm RenderForm { get => _renderForm; set => _renderForm = value; }
#endregion
public IntPtr Hook()
{
if (_d3d11VTblAddresses == null)
{
_d3d11VTblAddresses = new List<IntPtr>();
_dxgiSwapChainVTblAddresses = new List<IntPtr>();
#region Get Device and SwapChain method addresses
// Create temporary device + swapchain and determine method addresses
RenderForm = new SharpDX.Windows.RenderForm();
SharpDX.Direct3D11.Device.CreateWithSwapChain(
DriverType.Hardware,
DeviceCreationFlags.BgraSupport,
CreateSwapChainDescription(RenderForm.Handle),
out _device,
out _swapChain
);
if (_device != null && _swapChain != null)
{
_d3d11VTblAddresses.AddRange(GetVTblAddresses(_device.NativePointer, D3D11_DEVICE_METHOD_COUNT));
_dxgiSwapChainVTblAddresses.AddRange(GetVTblAddresses(_swapChain.NativePointer, DXGI_SWAPCHAIN_METHOD_COUNT));
}
_device.Dispose();
_swapChain.Dispose();
#endregion
}
return _dxgiSwapChainVTblAddresses[8];
}
}
}

13
Dalamud/Interface/InterfaceManager.cs
View file

@ -27,7 +27,7 @@ namespace Dalamud.Interface
private readonly Hook<PresentDelegate> presentHook;
private SwapChainAddressResolver Address { get; }
private DXHookD3D11 dXHookD3D11 = new DXHookD3D11();
private RawDX11Scene scene;
@ -38,16 +38,15 @@ namespace Dalamud.Interface
public InterfaceManager(SigScanner scanner)
{
Address = new SwapChainAddressResolver();
Address.Setup(scanner);
IntPtr addr = dXHookD3D11.Hook();
Log.Verbose("===== S W A P C H A I N =====");
Log.Verbose("Present address {Present}", Address.Present);
Log.Verbose("Present address {Present}", addr);
this.presentHook =
new Hook<PresentDelegate>(Address.Present,
new PresentDelegate(PresentDetour),
this);
new Hook<PresentDelegate>(addr,
new PresentDelegate(PresentDetour),
this);
}
public void Enable()