DX11 EndScene Hook

[zys924]

Thanks for your advice lanman92. But my problem lies in the SymFromName() function call's 126 error. The 2 debug libraries are correctly loaded actually.

The key is for kernel32 + CreateProcessW, it works. But for d3d9 + CD3DBase::EndScene, It does not.

Is there a possibility that my d3d9 or dxgi does not have symbols?

On the other hand, is there a way to grab the IDXGISwapChain VTable base address just like the way we grab EndScene() using static pointers? And in this way we can do simple VTable hook instead of a detour hook. That sounds nice~

[_Mike]

Thanks for your advice lanman92. But my problem lies in the SymFromName() function call's 126 error. The 2 debug libraries are correctly loaded actually.

The key is for kernel32 + CreateProcessW, it works. But for d3d9 + CD3DBase::EndScene, It does not.

Is there a possibility that my d3d9 or dxgi does not have symbols?

Very unlikely.
What does the debug output say, and what is your symbol search path?
Since you are calling SymInitialize() with null I assume you have a valid _NT_SYMBOL_PATH var.
If _NT_SYMBOL_PATH is empty and you aren't using a user specified one then dbghelp will only search the current working directory for symbol files. It will not download them from the net.

On the other hand, is there a way to grab the IDXGISwapChain VTable base address just like the way we grab EndScene() using static pointers? And in this way we can do simple VTable hook instead of a detour hook. That sounds nice~

Of course there is. It's exactly the same way as for D3D9, just different offsets.
I haven't looked if they are posted here, but they shouldn't be that hard to find by yourself. Set a breakpoint on Present and see where it's called from and how.
But why go for a method that has to be updated every patch when you can use a version, and even game, independent way?
Wow requires an internet connection anyways, so it's not like downloading symbol files are going to be a problem

And while vtable hooks are good if you know what you are doing, D3D has a nasty habit of resetting it's vtables when you do things it doesn't like so then you'd need more hooks than just EndScene and/or Present.

[zys924]

Thanks very much.

If _NT_SYMBOL_PATH is empty and you aren't using a user specified one then dbghelp will only search the current working directory for symbol files. It will not download them from the net.

This is just the problem! I tried to set it to download from microsoft. It works!