Hardcoding HLSL Shader

Question

I have a shader written in HLSL that I do not want the user to be able to access. Is there a way I can go about compiling from a section of memory. The problem is that the following function accepts an LPCSTR in order to use a .fx file as input:

    HRESULT D3DXCreateEffectFromFile(
  _In_   LPDIRECT3DDEVICE9 pDevice,
  _In_   LPCTSTR pSrcFile,
  _In_   const D3DXMACRO *pDefines,
  _In_   LPD3DXINCLUDE pInclude,
  _In_   DWORD Flags,
  _In_   LPD3DXEFFECTPOOL pPool,
  _Out_  LPD3DXEFFECT *ppEffect,
  _Out_  LPD3DXBUFFER *ppCompilationErrors
);

I need something more along the lines of void* or at least some way to compile from a block of memory. Other than just saving the data to a file, compiling, and deleting the file, is there a way to do this?

wchar_t* shaderCode = L"//Poorly formatted shader code goes here";

I want to be able to literally compile from the above section of memory. How can this be done?

What is your development environment? (Microsoft Visual Studio provides resource files) — Hesam Qodsi, Jul 23 '13 at 20:58
Yes, microsoft visual studio indeed. I'm going to look into that, thanks! — Joseph Pla, Jul 23 '13 at 20:59

Aaron Hagan · Accepted Answer · 2013-07-23T21:03:55.950

3

Yes. the D3DXCreateEffect function. Creates an effect from an ASCII or binary effect description.

http://msdn.microsoft.com/en-us/library/windows/desktop/bb172763(v=vs.85).aspx

Might also check out D3DX10CompileFromMemory..

http://msdn.microsoft.com/en-us/library/windows/desktop/bb310587(v=vs.85).aspx

edited Jul 23 '13 at 21:03

answered Jul 23 '13 at 20:57

Aaron Hagan

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Wow, I feel really stupid. Thanks so much, this is perfect :) – Joseph Pla Jul 23 '13 at 21:00
I'll accept it as soon as I can, problem is you answered too fast ;) – Joseph Pla Jul 23 '13 at 21:01
@JosephPla: Note that this does *not* prevent a user from being able to access the shader. They can always yank it from your executable, though obviously it requires more effort. But it requires *less* effort than figuring out what compression your pack files use and decoding it from that. – Nicol Bolas Jul 23 '13 at 22:18
@NicolBolas alright, thanks alot. I'll definitely keep that in mind. – Joseph Pla Jul 23 '13 at 22:35

Hardcoding HLSL Shader

1 Answers1