Function ImGui_ImplDX11_CreateDeviceObjects

KBotExt/imgui/imgui_impl_dx11.cpp:370–522

}

bool    ImGui_ImplDX11_CreateDeviceObjects()
{
	ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
	if (!bd->pd3dDevice)
		return false;
	if (bd->pFontSampler)
		ImGui_ImplDX11_InvalidateDeviceObjects();

	// By using D3DCompile() from <d3dcompiler.h> / d3dcompiler.lib, we introduce a dependency to a given version of d3dcompiler_XX.dll (see D3DCOMPILER_DLL_A)
	// If you would like to use this DX11 sample code but remove this dependency you can:
	//  1) compile once, save the compiled shader blobs into a file or source code and pass them to CreateVertexShader()/CreatePixelShader() [preferred solution]
	//  2) use code to detect any version of the DLL and grab a pointer to D3DCompile from the DLL.
	// See https://github.com/ocornut/imgui/pull/638 for sources and details.

	// Create the vertex shader
	{
		static const char* vertexShader =
			"cbuffer vertexBuffer : register(b0) \
            {\
              float4x4 ProjectionMatrix; \
            };\
            struct VS_INPUT\
            {\
              float2 pos : POSITION;\
              float4 col : COLOR0;\
              float2 uv  : TEXCOORD0;\
            };\
            \
            struct PS_INPUT\
            {\
              float4 pos : SV_POSITION;\
              float4 col : COLOR0;\
              float2 uv  : TEXCOORD0;\
            };\
            \
            PS_INPUT main(VS_INPUT input)\
            {\
              PS_INPUT output;\
              output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
              output.col = input.col;\
              output.uv  = input.uv;\
              return output;\
            }";

		ID3DBlob* vertexShaderBlob;
		if (FAILED(D3DCompile(vertexShader, strlen(vertexShader), nullptr, nullptr, nullptr, "main", "vs_4_0", 0, 0, &vertexShaderBlob, nullptr)))
			return false; // NB: Pass ID3DBlob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
		if (bd->pd3dDevice->CreateVertexShader(vertexShaderBlob->GetBufferPointer(), vertexShaderBlob->GetBufferSize(), nullptr, &bd->pVertexShader) != S_OK)
		{
			vertexShaderBlob->Release();
			return false;
		}

		// Create the input layout
		D3D11_INPUT_ELEMENT_DESC local_layout[] =
		{
			{ "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (UINT)IM_OFFSETOF(ImDrawVert, pos), D3D11_INPUT_PER_VERTEX_DATA, 0 },
			{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (UINT)IM_OFFSETOF(ImDrawVert, uv),  D3D11_INPUT_PER_VERTEX_DATA, 0 },