Tuesday, June 25, 2019

Making a DX12 'Hello World' Starting Point from D3D2HelloWorld Samples

To create a very basic starting point DX12 Visual Studio based on the D3D12 Samples SDK codebase (branching from friendly developer license code as starting point):

Update for Visual Studio 2019:

  • create an x64 project, unicode looks like default
  • didn't need the win32 preprocessor defn below.
  • did need the libs
  • did need to change the subystem to windows
  • did need to disable shaders.hlsl compilation

Visual Studio 2017
Create a console application (File->New Project->Empty Project)
Pull in .cpp, .c, and .hlsl files from D3DFramebuffer (my feeling is this is the best base case due to correct render loop that does not block on previous frames Present call before starting to build command list for next frame).

Changed to an x64 build environment
On the project, walked the 'full compiler options' and the 'full linker options'

  1. Change character set to unicode from multibyte
  2. Add  'WIN32' to preprocessor definitions


  1. Add d3d12.lib, d3dcompiler.lib, and dxgi.lib to the set of files to link to
  2. Change subsystem to  'Windows' 
  3. Disabled compilation of shaders.hlsl by Visual studio

Change the lines that compile the shaders from this:
 ThrowIfFailed(D3DCompileFromFile(GetAssetFullPath(L"shaders.hlsl").c_str(), nullptr, nullptr, "VSMain", "vs_5_0", compileFlags, 0, &vertexShader, nullptr));
 ThrowIfFailed(D3DCompileFromFile(GetAssetFullPath(L"shaders.hlsl").c_str(), nullptr, nullptr, "PSMain", "ps_5_0", compileFlags, 0, &pixelShader, nullptr));
To this:
ThrowIfFailed(D3DCompileFromFile(L"shaders.hlsl", nullptr, nullptr, "VSMain", "vs_5_0", compileFlags, 0, &vertexShader, nullptr));
ThrowIfFailed(D3DCompileFromFile(L"shaders.hlsl", nullptr, nullptr, "PSMain", "ps_5_0", compileFlags, 0, &pixelShader, nullptr));

Note: I am sure GetAssetFullPath is useful, probably esp. in remote debug cases. Will circle back to this later.

imgui for DX12 hints

command line, in a visual studio window, builds the .objs but does not create a .exe. Did not resolve.

was able to pull in the project for the visual studio solution into the main solution for the imgui project. i used that to create build the project. i got a runtime error on line 384:

    // Store our identifier
//    static_assert(sizeof(ImTextureID) >= sizeof(g_hFontSrvGpuDescHandle.ptr), "Can't pack descriptor handle into TexID, 32-bit not supported yet.");

commented this out to get the basic sample running and it did not crash.

useful to at least investigate/learn more about imgui with DX12

Sunday, June 02, 2019

Sinus infection doctor recommendations

aleve/advil X
mucinex X
sudafed X X (don't take after 3pm)
clariten X X (via 24hr version)
nedi pot