examples/imgui_impl_dx11.cpp - external/github.com/ocornut/imgui.git - Git at Google

 // dear imgui: Renderer for DirectX11
 // This needs to be used along with a Platform Binding (e.g. Win32)

 // Implemented features:
 //  [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.

 // You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
 // If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp
 // https://github.com/ocornut/imgui

 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2018-12-03: Misc: Added #pragma comment statement to automatically link with d3dcompiler.lib when using D3DCompile().
 //  2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
 //  2018-08-01: DirectX11: Querying for IDXGIFactory instead of IDXGIFactory1 to increase compatibility.
 //  2018-07-13: DirectX11: Fixed unreleased resources in Init and Shutdown functions.
 //  2018-06-08: Misc: Extracted imgui_impl_dx11.cpp/.h away from the old combined DX11+Win32 example.
 //  2018-06-08: DirectX11: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
 //  2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplDX11_RenderDrawData() in the .h file so you can call it yourself.
 //  2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
 //  2016-05-07: DirectX11: Disabling depth-write.

 #include "imgui.h"
 #include "imgui_impl_dx11.h"

 // DirectX
 #include <stdio.h>
 #include <d3d11.h>
 #include <d3dcompiler.h>
 #ifdef _MSC_VER
 #pragma comment(lib, "d3dcompiler") // Automatically link with d3dcompiler.lib as we are using D3DCompile() below.
 #endif

 // DirectX data
 static ID3D11Device*            g_pd3dDevice = NULL;
 static ID3D11DeviceContext*     g_pd3dDeviceContext = NULL;
 static IDXGIFactory*            g_pFactory = NULL;
 static ID3D11Buffer*            g_pVB = NULL;
 static ID3D11Buffer*            g_pIB = NULL;
 static ID3D10Blob*              g_pVertexShaderBlob = NULL;
 static ID3D11VertexShader*      g_pVertexShader = NULL;
 static ID3D11InputLayout*       g_pInputLayout = NULL;
 static ID3D11Buffer*            g_pVertexConstantBuffer = NULL;
 static ID3D10Blob*              g_pPixelShaderBlob = NULL;
 static ID3D11PixelShader*       g_pPixelShader = NULL;
 static ID3D11SamplerState*      g_pFontSampler = NULL;
 static ID3D11ShaderResourceView*g_pFontTextureView = NULL;
 static ID3D11RasterizerState*   g_pRasterizerState = NULL;
 static ID3D11BlendState*        g_pBlendState = NULL;
 static ID3D11DepthStencilState* g_pDepthStencilState = NULL;
 static int                      g_VertexBufferSize = 5000, g_IndexBufferSize = 10000;

 struct VERTEX_CONSTANT_BUFFER
 {
     float   mvp[4][4];
 };

 // Render function
 // (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
 void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
 {
     ID3D11DeviceContext* ctx = g_pd3dDeviceContext;

     // Create and grow vertex/index buffers if needed
     if (!g_pVB || g_VertexBufferSize < draw_data->TotalVtxCount)
     {
         if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
         g_VertexBufferSize = draw_data->TotalVtxCount + 5000;
         D3D11_BUFFER_DESC desc;
         memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
         desc.Usage = D3D11_USAGE_DYNAMIC;
         desc.ByteWidth = g_VertexBufferSize * sizeof(ImDrawVert);
         desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
         desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
         desc.MiscFlags = 0;
         if (g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVB) < 0)
             return;
     }
     if (!g_pIB || g_IndexBufferSize < draw_data->TotalIdxCount)
     {
         if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
         g_IndexBufferSize = draw_data->TotalIdxCount + 10000;
         D3D11_BUFFER_DESC desc;
         memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
         desc.Usage = D3D11_USAGE_DYNAMIC;
         desc.ByteWidth = g_IndexBufferSize * sizeof(ImDrawIdx);
         desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
         desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
         if (g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pIB) < 0)
             return;
     }

     // Copy and convert all vertices into a single contiguous buffer
     D3D11_MAPPED_SUBRESOURCE vtx_resource, idx_resource;
     if (ctx->Map(g_pVB, 0, D3D11_MAP_WRITE_DISCARD, 0, &vtx_resource) != S_OK)
         return;
     if (ctx->Map(g_pIB, 0, D3D11_MAP_WRITE_DISCARD, 0, &idx_resource) != S_OK)
         return;
     ImDrawVert* vtx_dst = (ImDrawVert*)vtx_resource.pData;
     ImDrawIdx* idx_dst = (ImDrawIdx*)idx_resource.pData;
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
         memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
         memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
         vtx_dst += cmd_list->VtxBuffer.Size;
         idx_dst += cmd_list->IdxBuffer.Size;
     }
     ctx->Unmap(g_pVB, 0);
     ctx->Unmap(g_pIB, 0);

     // Setup orthographic projection matrix into our constant buffer
     // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right).
     {
         D3D11_MAPPED_SUBRESOURCE mapped_resource;
         if (ctx->Map(g_pVertexConstantBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped_resource) != S_OK)
             return;
         VERTEX_CONSTANT_BUFFER* constant_buffer = (VERTEX_CONSTANT_BUFFER*)mapped_resource.pData;
         float L = draw_data->DisplayPos.x;
         float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
         float T = draw_data->DisplayPos.y;
         float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
         float mvp[4][4] =
         {
             { 2.0f/(R-L),   0.0f,           0.0f,       0.0f },
             { 0.0f,         2.0f/(T-B),     0.0f,       0.0f },
             { 0.0f,         0.0f,           0.5f,       0.0f },
             { (R+L)/(L-R),  (T+B)/(B-T),    0.5f,       1.0f },
         };
         memcpy(&constant_buffer->mvp, mvp, sizeof(mvp));
         ctx->Unmap(g_pVertexConstantBuffer, 0);
     }

     // Backup DX state that will be modified to restore it afterwards (unfortunately this is very ugly looking and verbose. Close your eyes!)
     struct BACKUP_DX11_STATE
     {
         UINT                        ScissorRectsCount, ViewportsCount;
         D3D11_RECT                  ScissorRects[D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
         D3D11_VIEWPORT              Viewports[D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
         ID3D11RasterizerState*      RS;
         ID3D11BlendState*           BlendState;
         FLOAT                       BlendFactor[4];
         UINT                        SampleMask;
         UINT                        StencilRef;
         ID3D11DepthStencilState*    DepthStencilState;
         ID3D11ShaderResourceView*   PSShaderResource;
         ID3D11SamplerState*         PSSampler;
         ID3D11PixelShader*          PS;
         ID3D11VertexShader*         VS;
         UINT                        PSInstancesCount, VSInstancesCount;
         ID3D11ClassInstance*        PSInstances[256], *VSInstances[256];   // 256 is max according to PSSetShader documentation
         D3D11_PRIMITIVE_TOPOLOGY    PrimitiveTopology;
         ID3D11Buffer*               IndexBuffer, *VertexBuffer, *VSConstantBuffer;
         UINT                        IndexBufferOffset, VertexBufferStride, VertexBufferOffset;
         DXGI_FORMAT                 IndexBufferFormat;
         ID3D11InputLayout*          InputLayout;
     };
     BACKUP_DX11_STATE old;
     old.ScissorRectsCount = old.ViewportsCount = D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE;
     ctx->RSGetScissorRects(&old.ScissorRectsCount, old.ScissorRects);
     ctx->RSGetViewports(&old.ViewportsCount, old.Viewports);
     ctx->RSGetState(&old.RS);
     ctx->OMGetBlendState(&old.BlendState, old.BlendFactor, &old.SampleMask);
     ctx->OMGetDepthStencilState(&old.DepthStencilState, &old.StencilRef);
     ctx->PSGetShaderResources(0, 1, &old.PSShaderResource);
     ctx->PSGetSamplers(0, 1, &old.PSSampler);
     old.PSInstancesCount = old.VSInstancesCount = 256;
     ctx->PSGetShader(&old.PS, old.PSInstances, &old.PSInstancesCount);
     ctx->VSGetShader(&old.VS, old.VSInstances, &old.VSInstancesCount);
     ctx->VSGetConstantBuffers(0, 1, &old.VSConstantBuffer);
     ctx->IAGetPrimitiveTopology(&old.PrimitiveTopology);
     ctx->IAGetIndexBuffer(&old.IndexBuffer, &old.IndexBufferFormat, &old.IndexBufferOffset);
     ctx->IAGetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset);
     ctx->IAGetInputLayout(&old.InputLayout);

     // Setup viewport
     D3D11_VIEWPORT vp;
     memset(&vp, 0, sizeof(D3D11_VIEWPORT));
     vp.Width =  draw_data->DisplaySize.x;
     vp.Height = draw_data->DisplaySize.y;
     vp.MinDepth = 0.0f;
     vp.MaxDepth = 1.0f;
     vp.TopLeftX = vp.TopLeftY = 0;
     ctx->RSSetViewports(1, &vp);

     // Bind shader and vertex buffers
     unsigned int stride = sizeof(ImDrawVert);
     unsigned int offset = 0;
     ctx->IASetInputLayout(g_pInputLayout);
     ctx->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
     ctx->IASetIndexBuffer(g_pIB, sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT, 0);
     ctx->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
     ctx->VSSetShader(g_pVertexShader, NULL, 0);
     ctx->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
     ctx->PSSetShader(g_pPixelShader, NULL, 0);
     ctx->PSSetSamplers(0, 1, &g_pFontSampler);

     // Setup render state
     const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f };
     ctx->OMSetBlendState(g_pBlendState, blend_factor, 0xffffffff);
     ctx->OMSetDepthStencilState(g_pDepthStencilState, 0);
     ctx->RSSetState(g_pRasterizerState);

     // Render command lists
     int vtx_offset = 0;
     int idx_offset = 0;
     ImVec2 pos = draw_data->DisplayPos;
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
         for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
             {
                 // User callback (registered via ImDrawList::AddCallback)
                 pcmd->UserCallback(cmd_list, pcmd);
             }
             else
             {
                 // Apply scissor/clipping rectangle
                 const D3D11_RECT r = { (LONG)(pcmd->ClipRect.x - pos.x), (LONG)(pcmd->ClipRect.y - pos.y), (LONG)(pcmd->ClipRect.z - pos.x), (LONG)(pcmd->ClipRect.w - pos.y) };
                 ctx->RSSetScissorRects(1, &r);

                 // Bind texture, Draw
                 ID3D11ShaderResourceView* texture_srv = (ID3D11ShaderResourceView*)pcmd->TextureId;
                 ctx->PSSetShaderResources(0, 1, &texture_srv);
                 ctx->DrawIndexed(pcmd->ElemCount, idx_offset, vtx_offset);
             }
             idx_offset += pcmd->ElemCount;
         }
         vtx_offset += cmd_list->VtxBuffer.Size;
     }

     // Restore modified DX state
     ctx->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);
     ctx->RSSetViewports(old.ViewportsCount, old.Viewports);
     ctx->RSSetState(old.RS); if (old.RS) old.RS->Release();
     ctx->OMSetBlendState(old.BlendState, old.BlendFactor, old.SampleMask); if (old.BlendState) old.BlendState->Release();
     ctx->OMSetDepthStencilState(old.DepthStencilState, old.StencilRef); if (old.DepthStencilState) old.DepthStencilState->Release();
     ctx->PSSetShaderResources(0, 1, &old.PSShaderResource); if (old.PSShaderResource) old.PSShaderResource->Release();
     ctx->PSSetSamplers(0, 1, &old.PSSampler); if (old.PSSampler) old.PSSampler->Release();
     ctx->PSSetShader(old.PS, old.PSInstances, old.PSInstancesCount); if (old.PS) old.PS->Release();
     for (UINT i = 0; i < old.PSInstancesCount; i++) if (old.PSInstances[i]) old.PSInstances[i]->Release();
     ctx->VSSetShader(old.VS, old.VSInstances, old.VSInstancesCount); if (old.VS) old.VS->Release();
     ctx->VSSetConstantBuffers(0, 1, &old.VSConstantBuffer); if (old.VSConstantBuffer) old.VSConstantBuffer->Release();
     for (UINT i = 0; i < old.VSInstancesCount; i++) if (old.VSInstances[i]) old.VSInstances[i]->Release();
     ctx->IASetPrimitiveTopology(old.PrimitiveTopology);
     ctx->IASetIndexBuffer(old.IndexBuffer, old.IndexBufferFormat, old.IndexBufferOffset); if (old.IndexBuffer) old.IndexBuffer->Release();
     ctx->IASetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset); if (old.VertexBuffer) old.VertexBuffer->Release();
     ctx->IASetInputLayout(old.InputLayout); if (old.InputLayout) old.InputLayout->Release();
 }

 static void ImGui_ImplDX11_CreateFontsTexture()
 {
     // Build texture atlas
     ImGuiIO& io = ImGui::GetIO();
     unsigned char* pixels;
     int width, height;
     io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);

     // Upload texture to graphics system
     {
         D3D11_TEXTURE2D_DESC desc;
         ZeroMemory(&desc, sizeof(desc));
         desc.Width = width;
         desc.Height = height;
         desc.MipLevels = 1;
         desc.ArraySize = 1;
         desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
         desc.SampleDesc.Count = 1;
         desc.Usage = D3D11_USAGE_DEFAULT;
         desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
         desc.CPUAccessFlags = 0;

         ID3D11Texture2D *pTexture = NULL;
         D3D11_SUBRESOURCE_DATA subResource;
         subResource.pSysMem = pixels;
         subResource.SysMemPitch = desc.Width * 4;
         subResource.SysMemSlicePitch = 0;
         g_pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture);

         // Create texture view
         D3D11_SHADER_RESOURCE_VIEW_DESC srvDesc;
         ZeroMemory(&srvDesc, sizeof(srvDesc));
         srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
         srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
         srvDesc.Texture2D.MipLevels = desc.MipLevels;
         srvDesc.Texture2D.MostDetailedMip = 0;
         g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &g_pFontTextureView);
         pTexture->Release();
     }

     // Store our identifier
     io.Fonts->TexID = (ImTextureID)g_pFontTextureView;

     // Create texture sampler
     {
         D3D11_SAMPLER_DESC desc;
         ZeroMemory(&desc, sizeof(desc));
         desc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
         desc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
         desc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
         desc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
         desc.MipLODBias = 0.f;
         desc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
         desc.MinLOD = 0.f;
         desc.MaxLOD = 0.f;
         g_pd3dDevice->CreateSamplerState(&desc, &g_pFontSampler);
     }
 }

 bool    ImGui_ImplDX11_CreateDeviceObjects()
 {
     if (!g_pd3dDevice)
         return false;
     if (g_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;\
             }";

         D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_4_0", 0, 0, &g_pVertexShaderBlob, NULL);
         if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
             return false;
         if (g_pd3dDevice->CreateVertexShader((DWORD*)g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), NULL, &g_pVertexShader) != S_OK)
             return false;

         // Create the input layout
         D3D11_INPUT_ELEMENT_DESC local_layout[] =
         {
             { "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (size_t)(&((ImDrawVert*)0)->pos), D3D11_INPUT_PER_VERTEX_DATA, 0 },
             { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (size_t)(&((ImDrawVert*)0)->uv),  D3D11_INPUT_PER_VERTEX_DATA, 0 },
             { "COLOR",    0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (size_t)(&((ImDrawVert*)0)->col), D3D11_INPUT_PER_VERTEX_DATA, 0 },
         };
         if (g_pd3dDevice->CreateInputLayout(local_layout, 3, g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pInputLayout) != S_OK)
             return false;

         // Create the constant buffer
         {
             D3D11_BUFFER_DESC desc;
             desc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER);
             desc.Usage = D3D11_USAGE_DYNAMIC;
             desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
             desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
             desc.MiscFlags = 0;
             g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVertexConstantBuffer);
         }
     }

     // Create the pixel shader
     {
         static const char* pixelShader =
             "struct PS_INPUT\
             {\
             float4 pos : SV_POSITION;\
             float4 col : COLOR0;\
             float2 uv  : TEXCOORD0;\
             };\
             sampler sampler0;\
             Texture2D texture0;\
             \
             float4 main(PS_INPUT input) : SV_Target\
             {\
             float4 out_col = input.col * texture0.Sample(sampler0, input.uv); \
             return out_col; \
             }";

         D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_4_0", 0, 0, &g_pPixelShaderBlob, NULL);
         if (g_pPixelShaderBlob == NULL)  // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
             return false;
         if (g_pd3dDevice->CreatePixelShader((DWORD*)g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize(), NULL, &g_pPixelShader) != S_OK)
             return false;
     }

     // Create the blending setup
     {
         D3D11_BLEND_DESC desc;
         ZeroMemory(&desc, sizeof(desc));
         desc.AlphaToCoverageEnable = false;
         desc.RenderTarget[0].BlendEnable = true;
         desc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
         desc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
         desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
         desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA;
         desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
         desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
         desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
         g_pd3dDevice->CreateBlendState(&desc, &g_pBlendState);
     }

     // Create the rasterizer state
     {
         D3D11_RASTERIZER_DESC desc;
         ZeroMemory(&desc, sizeof(desc));
         desc.FillMode = D3D11_FILL_SOLID;
         desc.CullMode = D3D11_CULL_NONE;
         desc.ScissorEnable = true;
         desc.DepthClipEnable = true;
         g_pd3dDevice->CreateRasterizerState(&desc, &g_pRasterizerState);
     }

     // Create depth-stencil State
     {
         D3D11_DEPTH_STENCIL_DESC desc;
         ZeroMemory(&desc, sizeof(desc));
         desc.DepthEnable = false;
         desc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
         desc.DepthFunc = D3D11_COMPARISON_ALWAYS;
         desc.StencilEnable = false;
         desc.FrontFace.StencilFailOp = desc.FrontFace.StencilDepthFailOp = desc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
         desc.FrontFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
         desc.BackFace = desc.FrontFace;
         g_pd3dDevice->CreateDepthStencilState(&desc, &g_pDepthStencilState);
     }

     ImGui_ImplDX11_CreateFontsTexture();

     return true;
 }

 void    ImGui_ImplDX11_InvalidateDeviceObjects()
 {
     if (!g_pd3dDevice)
         return;

     if (g_pFontSampler) { g_pFontSampler->Release(); g_pFontSampler = NULL; }
     if (g_pFontTextureView) { g_pFontTextureView->Release(); g_pFontTextureView = NULL; ImGui::GetIO().Fonts->TexID = NULL; } // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
     if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
     if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }

     if (g_pBlendState) { g_pBlendState->Release(); g_pBlendState = NULL; }
     if (g_pDepthStencilState) { g_pDepthStencilState->Release(); g_pDepthStencilState = NULL; }
     if (g_pRasterizerState) { g_pRasterizerState->Release(); g_pRasterizerState = NULL; }
     if (g_pPixelShader) { g_pPixelShader->Release(); g_pPixelShader = NULL; }
     if (g_pPixelShaderBlob) { g_pPixelShaderBlob->Release(); g_pPixelShaderBlob = NULL; }
     if (g_pVertexConstantBuffer) { g_pVertexConstantBuffer->Release(); g_pVertexConstantBuffer = NULL; }
     if (g_pInputLayout) { g_pInputLayout->Release(); g_pInputLayout = NULL; }
     if (g_pVertexShader) { g_pVertexShader->Release(); g_pVertexShader = NULL; }
     if (g_pVertexShaderBlob) { g_pVertexShaderBlob->Release(); g_pVertexShaderBlob = NULL; }
 }

 bool    ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_context)
 {
     ImGuiIO& io = ImGui::GetIO();
     io.BackendRendererName = "imgui_impl_dx11";

     // Get factory from device
     IDXGIDevice* pDXGIDevice = NULL;
     IDXGIAdapter* pDXGIAdapter = NULL;
     IDXGIFactory* pFactory = NULL;

     if (device->QueryInterface(IID_PPV_ARGS(&pDXGIDevice)) == S_OK)
         if (pDXGIDevice->GetParent(IID_PPV_ARGS(&pDXGIAdapter)) == S_OK)
             if (pDXGIAdapter->GetParent(IID_PPV_ARGS(&pFactory)) == S_OK)
             {
                 g_pd3dDevice = device;
                 g_pd3dDeviceContext = device_context;
                 g_pFactory = pFactory;
             }
     if (pDXGIDevice) pDXGIDevice->Release();
     if (pDXGIAdapter) pDXGIAdapter->Release();

     return true;
 }

 void ImGui_ImplDX11_Shutdown()
 {
     ImGui_ImplDX11_InvalidateDeviceObjects();
     if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
     g_pd3dDevice = NULL;
     g_pd3dDeviceContext = NULL;
 }

 void ImGui_ImplDX11_NewFrame()
 {
     if (!g_pFontSampler)
         ImGui_ImplDX11_CreateDeviceObjects();
 }
	// dear imgui: Renderer for DirectX11
	// This needs to be used along with a Platform Binding (e.g. Win32)

	// Implemented features:
	// [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.

	// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
	// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp
	// https://github.com/ocornut/imgui

	// CHANGELOG
	// (minor and older changes stripped away, please see git history for details)
	// 2018-12-03: Misc: Added #pragma comment statement to automatically link with d3dcompiler.lib when using D3DCompile().
	// 2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
	// 2018-08-01: DirectX11: Querying for IDXGIFactory instead of IDXGIFactory1 to increase compatibility.
	// 2018-07-13: DirectX11: Fixed unreleased resources in Init and Shutdown functions.
	// 2018-06-08: Misc: Extracted imgui_impl_dx11.cpp/.h away from the old combined DX11+Win32 example.
	// 2018-06-08: DirectX11: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
	// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplDX11_RenderDrawData() in the .h file so you can call it yourself.
	// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
	// 2016-05-07: DirectX11: Disabling depth-write.

	#include "imgui.h"
	#include "imgui_impl_dx11.h"

	// DirectX
	#include <stdio.h>
	#include <d3d11.h>
	#include <d3dcompiler.h>
	#ifdef _MSC_VER
	#pragma comment(lib, "d3dcompiler") // Automatically link with d3dcompiler.lib as we are using D3DCompile() below.
	#endif

	// DirectX data
	static ID3D11Device* g_pd3dDevice = NULL;
	static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
	static IDXGIFactory* g_pFactory = NULL;
	static ID3D11Buffer* g_pVB = NULL;
	static ID3D11Buffer* g_pIB = NULL;
	static ID3D10Blob* g_pVertexShaderBlob = NULL;
	static ID3D11VertexShader* g_pVertexShader = NULL;
	static ID3D11InputLayout* g_pInputLayout = NULL;
	static ID3D11Buffer* g_pVertexConstantBuffer = NULL;
	static ID3D10Blob* g_pPixelShaderBlob = NULL;
	static ID3D11PixelShader* g_pPixelShader = NULL;
	static ID3D11SamplerState* g_pFontSampler = NULL;
	static ID3D11ShaderResourceView*g_pFontTextureView = NULL;
	static ID3D11RasterizerState* g_pRasterizerState = NULL;
	static ID3D11BlendState* g_pBlendState = NULL;
	static ID3D11DepthStencilState* g_pDepthStencilState = NULL;
	static int g_VertexBufferSize = 5000, g_IndexBufferSize = 10000;

	struct VERTEX_CONSTANT_BUFFER
	{
	float mvp[4][4];
	};

	// Render function
	// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
	void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
	{
	ID3D11DeviceContext* ctx = g_pd3dDeviceContext;

	// Create and grow vertex/index buffers if needed
	if (!g_pVB \|\| g_VertexBufferSize < draw_data->TotalVtxCount)
	{
	if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
	g_VertexBufferSize = draw_data->TotalVtxCount + 5000;
	D3D11_BUFFER_DESC desc;
	memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
	desc.Usage = D3D11_USAGE_DYNAMIC;
	desc.ByteWidth = g_VertexBufferSize * sizeof(ImDrawVert);
	desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
	desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
	desc.MiscFlags = 0;
	if (g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVB) < 0)
	return;
	}
	if (!g_pIB \|\| g_IndexBufferSize < draw_data->TotalIdxCount)
	{
	if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
	g_IndexBufferSize = draw_data->TotalIdxCount + 10000;
	D3D11_BUFFER_DESC desc;
	memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
	desc.Usage = D3D11_USAGE_DYNAMIC;
	desc.ByteWidth = g_IndexBufferSize * sizeof(ImDrawIdx);
	desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
	desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
	if (g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pIB) < 0)
	return;
	}

	// Copy and convert all vertices into a single contiguous buffer
	D3D11_MAPPED_SUBRESOURCE vtx_resource, idx_resource;
	if (ctx->Map(g_pVB, 0, D3D11_MAP_WRITE_DISCARD, 0, &vtx_resource) != S_OK)
	return;
	if (ctx->Map(g_pIB, 0, D3D11_MAP_WRITE_DISCARD, 0, &idx_resource) != S_OK)
	return;
	ImDrawVert* vtx_dst = (ImDrawVert*)vtx_resource.pData;
	ImDrawIdx* idx_dst = (ImDrawIdx*)idx_resource.pData;
	for (int n = 0; n < draw_data->CmdListsCount; n++)
	{
	const ImDrawList* cmd_list = draw_data->CmdLists[n];
	memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
	memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
	vtx_dst += cmd_list->VtxBuffer.Size;
	idx_dst += cmd_list->IdxBuffer.Size;
	}
	ctx->Unmap(g_pVB, 0);
	ctx->Unmap(g_pIB, 0);

	// Setup orthographic projection matrix into our constant buffer
	// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right).
	{
	D3D11_MAPPED_SUBRESOURCE mapped_resource;
	if (ctx->Map(g_pVertexConstantBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped_resource) != S_OK)
	return;
	VERTEX_CONSTANT_BUFFER* constant_buffer = (VERTEX_CONSTANT_BUFFER*)mapped_resource.pData;
	float L = draw_data->DisplayPos.x;
	float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
	float T = draw_data->DisplayPos.y;
	float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
	float mvp[4][4] =
	{
	{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
	{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
	{ 0.0f, 0.0f, 0.5f, 0.0f },
	{ (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f },
	};
	memcpy(&constant_buffer->mvp, mvp, sizeof(mvp));
	ctx->Unmap(g_pVertexConstantBuffer, 0);
	}

	// Backup DX state that will be modified to restore it afterwards (unfortunately this is very ugly looking and verbose. Close your eyes!)
	struct BACKUP_DX11_STATE
	{
	UINT ScissorRectsCount, ViewportsCount;
	D3D11_RECT ScissorRects[D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
	D3D11_VIEWPORT Viewports[D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
	ID3D11RasterizerState* RS;
	ID3D11BlendState* BlendState;
	FLOAT BlendFactor[4];
	UINT SampleMask;
	UINT StencilRef;
	ID3D11DepthStencilState* DepthStencilState;
	ID3D11ShaderResourceView* PSShaderResource;
	ID3D11SamplerState* PSSampler;
	ID3D11PixelShader* PS;
	ID3D11VertexShader* VS;
	UINT PSInstancesCount, VSInstancesCount;
	ID3D11ClassInstance* PSInstances[256], *VSInstances[256]; // 256 is max according to PSSetShader documentation
	D3D11_PRIMITIVE_TOPOLOGY PrimitiveTopology;
	ID3D11Buffer* IndexBuffer, VertexBuffer, VSConstantBuffer;
	UINT IndexBufferOffset, VertexBufferStride, VertexBufferOffset;
	DXGI_FORMAT IndexBufferFormat;
	ID3D11InputLayout* InputLayout;
	};
	BACKUP_DX11_STATE old;
	old.ScissorRectsCount = old.ViewportsCount = D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE;
	ctx->RSGetScissorRects(&old.ScissorRectsCount, old.ScissorRects);
	ctx->RSGetViewports(&old.ViewportsCount, old.Viewports);
	ctx->RSGetState(&old.RS);
	ctx->OMGetBlendState(&old.BlendState, old.BlendFactor, &old.SampleMask);
	ctx->OMGetDepthStencilState(&old.DepthStencilState, &old.StencilRef);
	ctx->PSGetShaderResources(0, 1, &old.PSShaderResource);
	ctx->PSGetSamplers(0, 1, &old.PSSampler);
	old.PSInstancesCount = old.VSInstancesCount = 256;
	ctx->PSGetShader(&old.PS, old.PSInstances, &old.PSInstancesCount);
	ctx->VSGetShader(&old.VS, old.VSInstances, &old.VSInstancesCount);
	ctx->VSGetConstantBuffers(0, 1, &old.VSConstantBuffer);
	ctx->IAGetPrimitiveTopology(&old.PrimitiveTopology);
	ctx->IAGetIndexBuffer(&old.IndexBuffer, &old.IndexBufferFormat, &old.IndexBufferOffset);
	ctx->IAGetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset);
	ctx->IAGetInputLayout(&old.InputLayout);

	// Setup viewport
	D3D11_VIEWPORT vp;
	memset(&vp, 0, sizeof(D3D11_VIEWPORT));
	vp.Width = draw_data->DisplaySize.x;
	vp.Height = draw_data->DisplaySize.y;
	vp.MinDepth = 0.0f;
	vp.MaxDepth = 1.0f;
	vp.TopLeftX = vp.TopLeftY = 0;
	ctx->RSSetViewports(1, &vp);

	// Bind shader and vertex buffers
	unsigned int stride = sizeof(ImDrawVert);
	unsigned int offset = 0;
	ctx->IASetInputLayout(g_pInputLayout);
	ctx->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
	ctx->IASetIndexBuffer(g_pIB, sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT, 0);
	ctx->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
	ctx->VSSetShader(g_pVertexShader, NULL, 0);
	ctx->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
	ctx->PSSetShader(g_pPixelShader, NULL, 0);
	ctx->PSSetSamplers(0, 1, &g_pFontSampler);

	// Setup render state
	const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f };
	ctx->OMSetBlendState(g_pBlendState, blend_factor, 0xffffffff);
	ctx->OMSetDepthStencilState(g_pDepthStencilState, 0);
	ctx->RSSetState(g_pRasterizerState);

	// Render command lists
	int vtx_offset = 0;
	int idx_offset = 0;
	ImVec2 pos = draw_data->DisplayPos;
	for (int n = 0; n < draw_data->CmdListsCount; n++)
	{
	const ImDrawList* cmd_list = draw_data->CmdLists[n];
	for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
	{
	const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
	if (pcmd->UserCallback)
	{
	// User callback (registered via ImDrawList::AddCallback)
	pcmd->UserCallback(cmd_list, pcmd);
	}
	else
	{
	// Apply scissor/clipping rectangle
	const D3D11_RECT r = { (LONG)(pcmd->ClipRect.x - pos.x), (LONG)(pcmd->ClipRect.y - pos.y), (LONG)(pcmd->ClipRect.z - pos.x), (LONG)(pcmd->ClipRect.w - pos.y) };
	ctx->RSSetScissorRects(1, &r);

	// Bind texture, Draw
	ID3D11ShaderResourceView* texture_srv = (ID3D11ShaderResourceView*)pcmd->TextureId;
	ctx->PSSetShaderResources(0, 1, &texture_srv);
	ctx->DrawIndexed(pcmd->ElemCount, idx_offset, vtx_offset);
	}
	idx_offset += pcmd->ElemCount;
	}
	vtx_offset += cmd_list->VtxBuffer.Size;
	}

	// Restore modified DX state
	ctx->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);
	ctx->RSSetViewports(old.ViewportsCount, old.Viewports);
	ctx->RSSetState(old.RS); if (old.RS) old.RS->Release();
	ctx->OMSetBlendState(old.BlendState, old.BlendFactor, old.SampleMask); if (old.BlendState) old.BlendState->Release();
	ctx->OMSetDepthStencilState(old.DepthStencilState, old.StencilRef); if (old.DepthStencilState) old.DepthStencilState->Release();
	ctx->PSSetShaderResources(0, 1, &old.PSShaderResource); if (old.PSShaderResource) old.PSShaderResource->Release();
	ctx->PSSetSamplers(0, 1, &old.PSSampler); if (old.PSSampler) old.PSSampler->Release();
	ctx->PSSetShader(old.PS, old.PSInstances, old.PSInstancesCount); if (old.PS) old.PS->Release();
	for (UINT i = 0; i < old.PSInstancesCount; i++) if (old.PSInstances[i]) old.PSInstances[i]->Release();
	ctx->VSSetShader(old.VS, old.VSInstances, old.VSInstancesCount); if (old.VS) old.VS->Release();
	ctx->VSSetConstantBuffers(0, 1, &old.VSConstantBuffer); if (old.VSConstantBuffer) old.VSConstantBuffer->Release();
	for (UINT i = 0; i < old.VSInstancesCount; i++) if (old.VSInstances[i]) old.VSInstances[i]->Release();
	ctx->IASetPrimitiveTopology(old.PrimitiveTopology);
	ctx->IASetIndexBuffer(old.IndexBuffer, old.IndexBufferFormat, old.IndexBufferOffset); if (old.IndexBuffer) old.IndexBuffer->Release();
	ctx->IASetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset); if (old.VertexBuffer) old.VertexBuffer->Release();
	ctx->IASetInputLayout(old.InputLayout); if (old.InputLayout) old.InputLayout->Release();
	}

	static void ImGui_ImplDX11_CreateFontsTexture()
	{
	// Build texture atlas
	ImGuiIO& io = ImGui::GetIO();
	unsigned char* pixels;
	int width, height;
	io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);

	// Upload texture to graphics system
	{
	D3D11_TEXTURE2D_DESC desc;
	ZeroMemory(&desc, sizeof(desc));
	desc.Width = width;
	desc.Height = height;
	desc.MipLevels = 1;
	desc.ArraySize = 1;
	desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
	desc.SampleDesc.Count = 1;
	desc.Usage = D3D11_USAGE_DEFAULT;
	desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
	desc.CPUAccessFlags = 0;

	ID3D11Texture2D *pTexture = NULL;
	D3D11_SUBRESOURCE_DATA subResource;
	subResource.pSysMem = pixels;
	subResource.SysMemPitch = desc.Width * 4;
	subResource.SysMemSlicePitch = 0;
	g_pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture);

	// Create texture view
	D3D11_SHADER_RESOURCE_VIEW_DESC srvDesc;
	ZeroMemory(&srvDesc, sizeof(srvDesc));
	srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
	srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
	srvDesc.Texture2D.MipLevels = desc.MipLevels;
	srvDesc.Texture2D.MostDetailedMip = 0;
	g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &g_pFontTextureView);
	pTexture->Release();
	}

	// Store our identifier
	io.Fonts->TexID = (ImTextureID)g_pFontTextureView;

	// Create texture sampler
	{
	D3D11_SAMPLER_DESC desc;
	ZeroMemory(&desc, sizeof(desc));
	desc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
	desc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
	desc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
	desc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
	desc.MipLODBias = 0.f;
	desc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
	desc.MinLOD = 0.f;
	desc.MaxLOD = 0.f;
	g_pd3dDevice->CreateSamplerState(&desc, &g_pFontSampler);
	}
	}

	bool ImGui_ImplDX11_CreateDeviceObjects()
	{
	if (!g_pd3dDevice)
	return false;
	if (g_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;\
	}";

	D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_4_0", 0, 0, &g_pVertexShaderBlob, NULL);
	if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
	return false;
	if (g_pd3dDevice->CreateVertexShader((DWORD*)g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), NULL, &g_pVertexShader) != S_OK)
	return false;

	// Create the input layout
	D3D11_INPUT_ELEMENT_DESC local_layout[] =
	{
	{ "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT, 0, (size_t)(&((ImDrawVert*)0)->pos), D3D11_INPUT_PER_VERTEX_DATA, 0 },
	{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, (size_t)(&((ImDrawVert*)0)->uv), D3D11_INPUT_PER_VERTEX_DATA, 0 },
	{ "COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (size_t)(&((ImDrawVert*)0)->col), D3D11_INPUT_PER_VERTEX_DATA, 0 },
	};
	if (g_pd3dDevice->CreateInputLayout(local_layout, 3, g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pInputLayout) != S_OK)
	return false;

	// Create the constant buffer
	{
	D3D11_BUFFER_DESC desc;
	desc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER);
	desc.Usage = D3D11_USAGE_DYNAMIC;
	desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
	desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
	desc.MiscFlags = 0;
	g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVertexConstantBuffer);
	}
	}

	// Create the pixel shader
	{
	static const char* pixelShader =
	"struct PS_INPUT\
	{\
	float4 pos : SV_POSITION;\
	float4 col : COLOR0;\
	float2 uv : TEXCOORD0;\
	};\
	sampler sampler0;\
	Texture2D texture0;\
	\
	float4 main(PS_INPUT input) : SV_Target\
	{\
	float4 out_col = input.col * texture0.Sample(sampler0, input.uv); \
	return out_col; \
	}";

	D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_4_0", 0, 0, &g_pPixelShaderBlob, NULL);
	if (g_pPixelShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
	return false;
	if (g_pd3dDevice->CreatePixelShader((DWORD*)g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize(), NULL, &g_pPixelShader) != S_OK)
	return false;
	}

	// Create the blending setup
	{
	D3D11_BLEND_DESC desc;
	ZeroMemory(&desc, sizeof(desc));
	desc.AlphaToCoverageEnable = false;
	desc.RenderTarget[0].BlendEnable = true;
	desc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
	desc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
	desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
	desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA;
	desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
	desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
	desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
	g_pd3dDevice->CreateBlendState(&desc, &g_pBlendState);
	}

	// Create the rasterizer state
	{
	D3D11_RASTERIZER_DESC desc;
	ZeroMemory(&desc, sizeof(desc));
	desc.FillMode = D3D11_FILL_SOLID;
	desc.CullMode = D3D11_CULL_NONE;
	desc.ScissorEnable = true;
	desc.DepthClipEnable = true;
	g_pd3dDevice->CreateRasterizerState(&desc, &g_pRasterizerState);
	}

	// Create depth-stencil State
	{
	D3D11_DEPTH_STENCIL_DESC desc;
	ZeroMemory(&desc, sizeof(desc));
	desc.DepthEnable = false;
	desc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
	desc.DepthFunc = D3D11_COMPARISON_ALWAYS;
	desc.StencilEnable = false;
	desc.FrontFace.StencilFailOp = desc.FrontFace.StencilDepthFailOp = desc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
	desc.FrontFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
	desc.BackFace = desc.FrontFace;
	g_pd3dDevice->CreateDepthStencilState(&desc, &g_pDepthStencilState);
	}

	ImGui_ImplDX11_CreateFontsTexture();

	return true;
	}

	void ImGui_ImplDX11_InvalidateDeviceObjects()
	{
	if (!g_pd3dDevice)
	return;

	if (g_pFontSampler) { g_pFontSampler->Release(); g_pFontSampler = NULL; }
	if (g_pFontTextureView) { g_pFontTextureView->Release(); g_pFontTextureView = NULL; ImGui::GetIO().Fonts->TexID = NULL; } // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
	if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
	if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }

	if (g_pBlendState) { g_pBlendState->Release(); g_pBlendState = NULL; }
	if (g_pDepthStencilState) { g_pDepthStencilState->Release(); g_pDepthStencilState = NULL; }
	if (g_pRasterizerState) { g_pRasterizerState->Release(); g_pRasterizerState = NULL; }
	if (g_pPixelShader) { g_pPixelShader->Release(); g_pPixelShader = NULL; }
	if (g_pPixelShaderBlob) { g_pPixelShaderBlob->Release(); g_pPixelShaderBlob = NULL; }
	if (g_pVertexConstantBuffer) { g_pVertexConstantBuffer->Release(); g_pVertexConstantBuffer = NULL; }
	if (g_pInputLayout) { g_pInputLayout->Release(); g_pInputLayout = NULL; }
	if (g_pVertexShader) { g_pVertexShader->Release(); g_pVertexShader = NULL; }
	if (g_pVertexShaderBlob) { g_pVertexShaderBlob->Release(); g_pVertexShaderBlob = NULL; }
	}

	bool ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_context)
	{
	ImGuiIO& io = ImGui::GetIO();
	io.BackendRendererName = "imgui_impl_dx11";

	// Get factory from device
	IDXGIDevice* pDXGIDevice = NULL;
	IDXGIAdapter* pDXGIAdapter = NULL;
	IDXGIFactory* pFactory = NULL;

	if (device->QueryInterface(IID_PPV_ARGS(&pDXGIDevice)) == S_OK)
	if (pDXGIDevice->GetParent(IID_PPV_ARGS(&pDXGIAdapter)) == S_OK)
	if (pDXGIAdapter->GetParent(IID_PPV_ARGS(&pFactory)) == S_OK)
	{
	g_pd3dDevice = device;
	g_pd3dDeviceContext = device_context;
	g_pFactory = pFactory;
	}
	if (pDXGIDevice) pDXGIDevice->Release();
	if (pDXGIAdapter) pDXGIAdapter->Release();

	return true;
	}

	void ImGui_ImplDX11_Shutdown()
	{
	ImGui_ImplDX11_InvalidateDeviceObjects();
	if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
	g_pd3dDevice = NULL;
	g_pd3dDeviceContext = NULL;
	}

	void ImGui_ImplDX11_NewFrame()
	{
	if (!g_pFontSampler)
	ImGui_ImplDX11_CreateDeviceObjects();
	}