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README.md

      1 The resulting d3d10sw.dll implements D3D10's software rendering interface, like
      2 WARP.
      3 
      4 
      5 It can be used directly from WLK 1.6 and WHCK 2.0 D3D10+ tests, via the -Src
      6 and -SWDLL options. For example:
      7 
      8     wgf11blend.exe -Debug -DoNotCatchExceptions -DXGI:1.1 -FeatureLevel:10.0 -Src:SW -SWDLL:d3d10sw.dll -LogClean -LogVerbose
      9 
     10 However, as of WHCK version 2.1 this mechanism no longer works reliably.
     11 Either you use WHCK 2.0 binaries, or you must use the alternative method
     12 cribed below (of copying d3d10sw.dll into the executable directory and rename
     13 it such that it matches the D3D10 UMD of the test machine).
     14 
     15 
     16 Examples can be easily modified to load it too:
     17 
     18     D3D10CreateDeviceAndSwapChain(NULL,
     19                                   D3D10_DRIVER_TYPE_SOFTWARE,
     20                                   LoadLibraryA("d3d10sw"), /* Software */
     21                                   Flags,
     22                                   D3D10_SDK_VERSION,
     23                                   &SwapChainDesc,
     24                                   &g_pSwapChain,
     25                                   &g_pDevice);
     26 
     27     D3D11CreateDeviceAndSwapChain(NULL, /* pAdapter */
     28                                   D3D_DRIVER_TYPE_SOFTWARE,
     29                                   LoadLibraryA("d3d10sw"), /* Software */
     30                                   Flags,
     31                                   FeatureLevels,
     32                                   sizeof FeatureLevels / sizeof FeatureLevels[0],
     33                                   D3D11_SDK_VERSION,
     34                                   &SwapChainDesc,
     35                                   &g_pSwapChain,
     36                                   &g_pDevice,
     37                                   NULL, /* pFeatureLevel */
     38                                   &g_pDeviceContext); /* ppImmediateContext */
     39 
     40 
     41 Alternatively, it can be renamed into the system's D3D10 UMD driver (e.g.,
     42 vm3dum_10.dll for VMware vGPU, nvwgf2um.dll for NVIDIA GPU), and placed into
     43 the application directory, or system's directory, and used instead.
     44 
     45 For the DLL to be picked from the application directory you'll need to do the
     46 following once:
     47 
     48     reg add "HKLM\System\CurrentControlSet\Control\Session Manager" /v "SafeDllSearchMode" /t REG_DWORD /d 0 /f
     49 
     50 See also https://docs.microsoft.com/en-us/windows/win32/dlls/dynamic-link-library-search-order
     51