diff options
Diffstat (limited to '3rdparty/imgui/backend/imgui_impl_dx11.cpp')
| -rw-r--r-- | 3rdparty/imgui/backend/imgui_impl_dx11.cpp | 594 |
1 files changed, 0 insertions, 594 deletions
diff --git a/3rdparty/imgui/backend/imgui_impl_dx11.cpp b/3rdparty/imgui/backend/imgui_impl_dx11.cpp deleted file mode 100644 index 3f628cb..0000000 --- a/3rdparty/imgui/backend/imgui_impl_dx11.cpp +++ /dev/null @@ -1,594 +0,0 @@ -// dear imgui: Renderer Backend for DirectX11 -// This needs to be used along with a Platform Backend (e.g. Win32) - -// Implemented features: -// [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID! -// [X] Renderer: Support for large meshes (64k+ vertices) with 16-bit indices. - -// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. -// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need. -// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp. -// Read online: https://github.com/ocornut/imgui/tree/master/docs - -// CHANGELOG -// (minor and older changes stripped away, please see git history for details) -// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX). -// 2021-05-19: DirectX11: Replaced direct access to ImDrawCmd::TextureId with a call to ImDrawCmd::GetTexID(). (will become a requirement) -// 2021-02-18: DirectX11: Change blending equation to preserve alpha in output buffer. -// 2019-08-01: DirectX11: Fixed code querying the Geometry Shader state (would generally error with Debug layer enabled). -// 2019-07-21: DirectX11: Backup, clear and restore Geometry Shader is any is bound when calling ImGui_ImplDX10_RenderDrawData. Clearing Hull/Domain/Compute shaders without backup/restore. -// 2019-05-29: DirectX11: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag. -// 2019-04-30: DirectX11: Added support for special ImDrawCallback_ResetRenderState callback to reset render state. -// 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 - -// DirectX11 data -struct ImGui_ImplDX11_Data -{ - ID3D11Device* pd3dDevice; - ID3D11DeviceContext* pd3dDeviceContext; - IDXGIFactory* pFactory; - ID3D11Buffer* pVB; - ID3D11Buffer* pIB; - ID3D11VertexShader* pVertexShader; - ID3D11InputLayout* pInputLayout; - ID3D11Buffer* pVertexConstantBuffer; - ID3D11PixelShader* pPixelShader; - ID3D11SamplerState* pFontSampler; - ID3D11ShaderResourceView* pFontTextureView; - ID3D11RasterizerState* pRasterizerState; - ID3D11BlendState* pBlendState; - ID3D11DepthStencilState* pDepthStencilState; - int VertexBufferSize; - int IndexBufferSize; - - ImGui_ImplDX11_Data() { memset(this, 0, sizeof(*this)); VertexBufferSize = 5000; IndexBufferSize = 10000; } -}; - -struct VERTEX_CONSTANT_BUFFER -{ - float mvp[4][4]; -}; - -// Backend data stored in io.BackendRendererUserData to allow support for multiple Dear ImGui contexts -// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts. -static ImGui_ImplDX11_Data* ImGui_ImplDX11_GetBackendData() -{ - return ImGui::GetCurrentContext() ? (ImGui_ImplDX11_Data*)ImGui::GetIO().BackendRendererUserData : NULL; -} - -// Functions -static void ImGui_ImplDX11_SetupRenderState(ImDrawData* draw_data, ID3D11DeviceContext* ctx) -{ - ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); - - // 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); - - // Setup shader and vertex buffers - unsigned int stride = sizeof(ImDrawVert); - unsigned int offset = 0; - ctx->IASetInputLayout(bd->pInputLayout); - ctx->IASetVertexBuffers(0, 1, &bd->pVB, &stride, &offset); - ctx->IASetIndexBuffer(bd->pIB, sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT, 0); - ctx->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST); - ctx->VSSetShader(bd->pVertexShader, NULL, 0); - ctx->VSSetConstantBuffers(0, 1, &bd->pVertexConstantBuffer); - ctx->PSSetShader(bd->pPixelShader, NULL, 0); - ctx->PSSetSamplers(0, 1, &bd->pFontSampler); - ctx->GSSetShader(NULL, NULL, 0); - ctx->HSSetShader(NULL, NULL, 0); // In theory we should backup and restore this as well.. very infrequently used.. - ctx->DSSetShader(NULL, NULL, 0); // In theory we should backup and restore this as well.. very infrequently used.. - ctx->CSSetShader(NULL, NULL, 0); // In theory we should backup and restore this as well.. very infrequently used.. - - // Setup blend state - const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f }; - ctx->OMSetBlendState(bd->pBlendState, blend_factor, 0xffffffff); - ctx->OMSetDepthStencilState(bd->pDepthStencilState, 0); - ctx->RSSetState(bd->pRasterizerState); -} - -// Render function -void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data) -{ - // Avoid rendering when minimized - if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f) - return; - - ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); - ID3D11DeviceContext* ctx = bd->pd3dDeviceContext; - - // Create and grow vertex/index buffers if needed - if (!bd->pVB || bd->VertexBufferSize < draw_data->TotalVtxCount) - { - if (bd->pVB) { bd->pVB->Release(); bd->pVB = NULL; } - bd->VertexBufferSize = draw_data->TotalVtxCount + 5000; - D3D11_BUFFER_DESC desc; - memset(&desc, 0, sizeof(D3D11_BUFFER_DESC)); - desc.Usage = D3D11_USAGE_DYNAMIC; - desc.ByteWidth = bd->VertexBufferSize * sizeof(ImDrawVert); - desc.BindFlags = D3D11_BIND_VERTEX_BUFFER; - desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; - desc.MiscFlags = 0; - if (bd->pd3dDevice->CreateBuffer(&desc, NULL, &bd->pVB) < 0) - return; - } - if (!bd->pIB || bd->IndexBufferSize < draw_data->TotalIdxCount) - { - if (bd->pIB) { bd->pIB->Release(); bd->pIB = NULL; } - bd->IndexBufferSize = draw_data->TotalIdxCount + 10000; - D3D11_BUFFER_DESC desc; - memset(&desc, 0, sizeof(D3D11_BUFFER_DESC)); - desc.Usage = D3D11_USAGE_DYNAMIC; - desc.ByteWidth = bd->IndexBufferSize * sizeof(ImDrawIdx); - desc.BindFlags = D3D11_BIND_INDEX_BUFFER; - desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; - if (bd->pd3dDevice->CreateBuffer(&desc, NULL, &bd->pIB) < 0) - return; - } - - // Upload vertex/index data into a single contiguous GPU buffer - D3D11_MAPPED_SUBRESOURCE vtx_resource, idx_resource; - if (ctx->Map(bd->pVB, 0, D3D11_MAP_WRITE_DISCARD, 0, &vtx_resource) != S_OK) - return; - if (ctx->Map(bd->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(bd->pVB, 0); - ctx->Unmap(bd->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). DisplayPos is (0,0) for single viewport apps. - { - D3D11_MAPPED_SUBRESOURCE mapped_resource; - if (ctx->Map(bd->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(bd->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; - ID3D11GeometryShader* GS; - UINT PSInstancesCount, VSInstancesCount, GSInstancesCount; - ID3D11ClassInstance *PSInstances[256], *VSInstances[256], *GSInstances[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 = old.GSInstancesCount = 256; - ctx->PSGetShader(&old.PS, old.PSInstances, &old.PSInstancesCount); - ctx->VSGetShader(&old.VS, old.VSInstances, &old.VSInstancesCount); - ctx->VSGetConstantBuffers(0, 1, &old.VSConstantBuffer); - ctx->GSGetShader(&old.GS, old.GSInstances, &old.GSInstancesCount); - - 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 desired DX state - ImGui_ImplDX11_SetupRenderState(draw_data, ctx); - - // Render command lists - // (Because we merged all buffers into a single one, we maintain our own offset into them) - int global_idx_offset = 0; - int global_vtx_offset = 0; - ImVec2 clip_off = 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 != NULL) - { - // User callback, registered via ImDrawList::AddCallback() - // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.) - if (pcmd->UserCallback == ImDrawCallback_ResetRenderState) - ImGui_ImplDX11_SetupRenderState(draw_data, ctx); - else - pcmd->UserCallback(cmd_list, pcmd); - } - else - { - // Project scissor/clipping rectangles into framebuffer space - ImVec2 clip_min(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y); - ImVec2 clip_max(pcmd->ClipRect.z - clip_off.x, pcmd->ClipRect.w - clip_off.y); - if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y) - continue; - - // Apply scissor/clipping rectangle - const D3D11_RECT r = { (LONG)clip_min.x, (LONG)clip_min.y, (LONG)clip_max.x, (LONG)clip_max.y }; - ctx->RSSetScissorRects(1, &r); - - // Bind texture, Draw - ID3D11ShaderResourceView* texture_srv = (ID3D11ShaderResourceView*)pcmd->GetTexID(); - ctx->PSSetShaderResources(0, 1, &texture_srv); - ctx->DrawIndexed(pcmd->ElemCount, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset); - } - } - global_idx_offset += cmd_list->IdxBuffer.Size; - global_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(); - ctx->GSSetShader(old.GS, old.GSInstances, old.GSInstancesCount); if (old.GS) old.GS->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(); - ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); - 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; - bd->pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture); - IM_ASSERT(pTexture != NULL); - - // 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; - bd->pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &bd->pFontTextureView); - pTexture->Release(); - } - - // Store our identifier - io.Fonts->SetTexID((ImTextureID)bd->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; - bd->pd3dDevice->CreateSamplerState(&desc, &bd->pFontSampler); - } -} - -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), NULL, NULL, NULL, "main", "vs_4_0", 0, 0, &vertexShaderBlob, NULL))) - 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(), NULL, &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 }, - { "COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (UINT)IM_OFFSETOF(ImDrawVert, col), D3D11_INPUT_PER_VERTEX_DATA, 0 }, - }; - if (bd->pd3dDevice->CreateInputLayout(local_layout, 3, vertexShaderBlob->GetBufferPointer(), vertexShaderBlob->GetBufferSize(), &bd->pInputLayout) != S_OK) - { - vertexShaderBlob->Release(); - return false; - } - vertexShaderBlob->Release(); - - // 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; - bd->pd3dDevice->CreateBuffer(&desc, NULL, &bd->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; \ - }"; - - ID3DBlob* pixelShaderBlob; - if (FAILED(D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_4_0", 0, 0, &pixelShaderBlob, NULL))) - 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->CreatePixelShader(pixelShaderBlob->GetBufferPointer(), pixelShaderBlob->GetBufferSize(), NULL, &bd->pPixelShader) != S_OK) - { - pixelShaderBlob->Release(); - return false; - } - pixelShaderBlob->Release(); - } - - // 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_ONE; - desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA; - desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD; - desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL; - bd->pd3dDevice->CreateBlendState(&desc, &bd->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; - bd->pd3dDevice->CreateRasterizerState(&desc, &bd->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; - bd->pd3dDevice->CreateDepthStencilState(&desc, &bd->pDepthStencilState); - } - - ImGui_ImplDX11_CreateFontsTexture(); - - return true; -} - -void ImGui_ImplDX11_InvalidateDeviceObjects() -{ - ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); - if (!bd->pd3dDevice) - return; - - if (bd->pFontSampler) { bd->pFontSampler->Release(); bd->pFontSampler = NULL; } - if (bd->pFontTextureView) { bd->pFontTextureView->Release(); bd->pFontTextureView = NULL; ImGui::GetIO().Fonts->SetTexID(NULL); } // We copied data->pFontTextureView to io.Fonts->TexID so let's clear that as well. - if (bd->pIB) { bd->pIB->Release(); bd->pIB = NULL; } - if (bd->pVB) { bd->pVB->Release(); bd->pVB = NULL; } - if (bd->pBlendState) { bd->pBlendState->Release(); bd->pBlendState = NULL; } - if (bd->pDepthStencilState) { bd->pDepthStencilState->Release(); bd->pDepthStencilState = NULL; } - if (bd->pRasterizerState) { bd->pRasterizerState->Release(); bd->pRasterizerState = NULL; } - if (bd->pPixelShader) { bd->pPixelShader->Release(); bd->pPixelShader = NULL; } - if (bd->pVertexConstantBuffer) { bd->pVertexConstantBuffer->Release(); bd->pVertexConstantBuffer = NULL; } - if (bd->pInputLayout) { bd->pInputLayout->Release(); bd->pInputLayout = NULL; } - if (bd->pVertexShader) { bd->pVertexShader->Release(); bd->pVertexShader = NULL; } -} - -bool ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_context) -{ - ImGuiIO& io = ImGui::GetIO(); - IM_ASSERT(io.BackendRendererUserData == NULL && "Already initialized a renderer backend!"); - - // Setup backend capabilities flags - ImGui_ImplDX11_Data* bd = IM_NEW(ImGui_ImplDX11_Data)(); - io.BackendRendererUserData = (void*)bd; - io.BackendRendererName = "imgui_impl_dx11"; - io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes. - - // 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) - { - bd->pd3dDevice = device; - bd->pd3dDeviceContext = device_context; - bd->pFactory = pFactory; - } - if (pDXGIDevice) pDXGIDevice->Release(); - if (pDXGIAdapter) pDXGIAdapter->Release(); - bd->pd3dDevice->AddRef(); - bd->pd3dDeviceContext->AddRef(); - - return true; -} - -void ImGui_ImplDX11_Shutdown() -{ - ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); - IM_ASSERT(bd != NULL && "No renderer backend to shutdown, or already shutdown?"); - ImGuiIO& io = ImGui::GetIO(); - - ImGui_ImplDX11_InvalidateDeviceObjects(); - if (bd->pFactory) { bd->pFactory->Release(); } - if (bd->pd3dDevice) { bd->pd3dDevice->Release(); } - if (bd->pd3dDeviceContext) { bd->pd3dDeviceContext->Release(); } - io.BackendRendererName = NULL; - io.BackendRendererUserData = NULL; - IM_DELETE(bd); -} - -void ImGui_ImplDX11_NewFrame() -{ - ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); - IM_ASSERT(bd != NULL && "Did you call ImGui_ImplDX11_Init()?"); - - if (!bd->pFontSampler) - ImGui_ImplDX11_CreateDeviceObjects(); -} |