4n How to Hook DirectX11 get Shader bytecode

• Question

• 

  

  0

  Sign in to vote

  【DirectX9 Get shader bytecode-】 I hook DrawIndexedPrimitive

  HookCode(PPointer(g_DeviceBaseAddr + $148)^,@NewDrawIndexedPrimitive, @OldDrawIndexedPrimitive);    
  
  function NewDrawIndexedPrimitive(const Device:IDirect3DDevice9;_Type: TD3DPrimitiveType; BaseVertexIndex: Integer; MinVertexIndex, NumVertices, startIndex, primCount: LongWord): HResult; stdcall;
  var
      ppShader: IDirect3DVertexShader9;
      _Code:Pointer;
      _CodeLen:Cardinal;
  begin
      Device.GetVertexShader(ppShader);//<------1.Get ShaderObject(ppShader)
      ppShader.GetFunction(nil,_CodeLen);
      GetMem(_Code,_CodeLen);
      ppShader.GetFunction(_Code,_CodeLen);//<----2.Get bytecode from ShaderObject(ppShader)
      Result:=OldDrawIndexedPrimitive(Self,_Type,BaseVertexIndex,MinVertexIndex, NumVertices, startIndex, primCount);
  end;
  

  【How to DirectX11 Get VSShader bytecode?】 I hook DrawIndexed

  pDrawIndexed:=PPointer(PUINT_PTR(UINT_PTR(g_ImmContext)+0)^ + 12 * SizeOf(Pointer))^;
  HookCode(pDrawIndexed,@NewDrawIndexed,@OldDrawIndexed);
  
  procedure NewDrawIndexed(g_Real_ImmContext:ID3D11DeviceContext;IndexCount:     UINT;StartIndexLocation: UINT;BaseVertexLocation: Integer); stdcall;
  var
      game_pVertexShader: ID3D11VertexShader;
          ppClassInstances: ID3D11ClassInstance;
          NumClassInstances: UINT
  begin
      g_Real_ImmContext.VSGetShader(game_pVertexShader,ppClassInstances,NumClassInstances);    //<------1.Get ShaderObject(game_pVertexShader)
      .....//<----2.Here's how to get bytecode from ShaderObject(game_pVertexShader)?
      OldDrawIndexed(ImmContext, IndexCount, StartIndexLocation, BaseVertexLocation);
  end;
  

  Another way:

  HOOK CreateVertexShader()

  but

  HOOK need to be created before the game CreateVertexShader, HOOK will not get bytecode if the game is running later,I need to get bytecode at any time like DirectX9

  
  

  • Edited by hksoobe Sunday, February 25, 2018 9:07 AM
  • Moved by Annie Chen-MSFT Monday, February 26, 2018 3:17 AM

  Sunday, February 25, 2018 5:59 AM