| // dear imgui: Renderer for DirectX12 |
| // This needs to be used along with a Platform Binding (e.g. Win32) |
| |
| // Implemented features: |
| // [X] Renderer: User texture binding. Use 'D3D12_GPU_DESCRIPTOR_HANDLE' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp. |
| // [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices. |
| // Issues: |
| // [ ] 64-bit only for now! (Because sizeof(ImTextureId) == sizeof(void*)). See github.com/ocornut/imgui/pull/301 |
| |
| // 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) |
| // 2019-05-29: DirectX12: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag. |
| // 2019-04-30: DirectX12: Added support for special ImDrawCallback_ResetRenderState callback to reset render state. |
| // 2019-03-29: Misc: Various minor tidying up. |
| // 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. |
| // 2018-06-12: DirectX12: Moved the ID3D12GraphicsCommandList* parameter from NewFrame() to RenderDrawData(). |
| // 2018-06-08: Misc: Extracted imgui_impl_dx12.cpp/.h away from the old combined DX12+Win32 example. |
| // 2018-06-08: DirectX12: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle (to ease support for future multi-viewport). |
| // 2018-02-22: Merged into master with all Win32 code synchronized to other examples. |
| |
| #include "imgui.h" |
| #include "imgui_impl_dx12.h" |
| |
| // DirectX |
| #include <d3d12.h> |
| #include <dxgi1_4.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 ID3D12Device* g_pd3dDevice = NULL; |
| static ID3D10Blob* g_pVertexShaderBlob = NULL; |
| static ID3D10Blob* g_pPixelShaderBlob = NULL; |
| static ID3D12RootSignature* g_pRootSignature = NULL; |
| static ID3D12PipelineState* g_pPipelineState = NULL; |
| static DXGI_FORMAT g_RTVFormat = DXGI_FORMAT_UNKNOWN; |
| static ID3D12Resource* g_pFontTextureResource = NULL; |
| static D3D12_CPU_DESCRIPTOR_HANDLE g_hFontSrvCpuDescHandle = {}; |
| static D3D12_GPU_DESCRIPTOR_HANDLE g_hFontSrvGpuDescHandle = {}; |
| |
| struct FrameResources |
| { |
| ID3D12Resource* IndexBuffer; |
| ID3D12Resource* VertexBuffer; |
| int IndexBufferSize; |
| int VertexBufferSize; |
| }; |
| static FrameResources* g_pFrameResources = NULL; |
| static UINT g_numFramesInFlight = 0; |
| static UINT g_frameIndex = UINT_MAX; |
| |
| struct VERTEX_CONSTANT_BUFFER |
| { |
| float mvp[4][4]; |
| }; |
| |
| static void ImGui_ImplDX12_SetupRenderState(ImDrawData* draw_data, ID3D12GraphicsCommandList* ctx, FrameResources* fr) |
| { |
| // 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). |
| VERTEX_CONSTANT_BUFFER vertex_constant_buffer; |
| { |
| 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(&vertex_constant_buffer.mvp, mvp, sizeof(mvp)); |
| } |
| |
| // Setup viewport |
| D3D12_VIEWPORT vp; |
| memset(&vp, 0, sizeof(D3D12_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 = 0.0f; |
| ctx->RSSetViewports(1, &vp); |
| |
| // Bind shader and vertex buffers |
| unsigned int stride = sizeof(ImDrawVert); |
| unsigned int offset = 0; |
| D3D12_VERTEX_BUFFER_VIEW vbv; |
| memset(&vbv, 0, sizeof(D3D12_VERTEX_BUFFER_VIEW)); |
| vbv.BufferLocation = fr->VertexBuffer->GetGPUVirtualAddress() + offset; |
| vbv.SizeInBytes = fr->VertexBufferSize * stride; |
| vbv.StrideInBytes = stride; |
| ctx->IASetVertexBuffers(0, 1, &vbv); |
| D3D12_INDEX_BUFFER_VIEW ibv; |
| memset(&ibv, 0, sizeof(D3D12_INDEX_BUFFER_VIEW)); |
| ibv.BufferLocation = fr->IndexBuffer->GetGPUVirtualAddress(); |
| ibv.SizeInBytes = fr->IndexBufferSize * sizeof(ImDrawIdx); |
| ibv.Format = sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT; |
| ctx->IASetIndexBuffer(&ibv); |
| ctx->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST); |
| ctx->SetPipelineState(g_pPipelineState); |
| ctx->SetGraphicsRootSignature(g_pRootSignature); |
| ctx->SetGraphicsRoot32BitConstants(0, 16, &vertex_constant_buffer, 0); |
| |
| // Setup blend factor |
| const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f }; |
| ctx->OMSetBlendFactor(blend_factor); |
| } |
| |
| // 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_ImplDX12_RenderDrawData(ImDrawData* draw_data, ID3D12GraphicsCommandList* ctx) |
| { |
| // Avoid rendering when minimized |
| if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f) |
| return; |
| |
| // FIXME: I'm assuming that this only gets called once per frame! |
| // If not, we can't just re-allocate the IB or VB, we'll have to do a proper allocator. |
| g_frameIndex = g_frameIndex + 1; |
| FrameResources* fr = &g_pFrameResources[g_frameIndex % g_numFramesInFlight]; |
| |
| // Create and grow vertex/index buffers if needed |
| if (fr->VertexBuffer == NULL || fr->VertexBufferSize < draw_data->TotalVtxCount) |
| { |
| if (fr->VertexBuffer != NULL) { fr->VertexBuffer->Release(); fr->VertexBuffer = NULL; } |
| fr->VertexBufferSize = draw_data->TotalVtxCount + 5000; |
| D3D12_HEAP_PROPERTIES props; |
| memset(&props, 0, sizeof(D3D12_HEAP_PROPERTIES)); |
| props.Type = D3D12_HEAP_TYPE_UPLOAD; |
| props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN; |
| props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN; |
| D3D12_RESOURCE_DESC desc; |
| memset(&desc, 0, sizeof(D3D12_RESOURCE_DESC)); |
| desc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER; |
| desc.Width = fr->VertexBufferSize * sizeof(ImDrawVert); |
| desc.Height = 1; |
| desc.DepthOrArraySize = 1; |
| desc.MipLevels = 1; |
| desc.Format = DXGI_FORMAT_UNKNOWN; |
| desc.SampleDesc.Count = 1; |
| desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR; |
| desc.Flags = D3D12_RESOURCE_FLAG_NONE; |
| if (g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&fr->VertexBuffer)) < 0) |
| return; |
| } |
| if (fr->IndexBuffer == NULL || fr->IndexBufferSize < draw_data->TotalIdxCount) |
| { |
| if (fr->IndexBuffer != NULL) { fr->IndexBuffer->Release(); fr->IndexBuffer = NULL; } |
| fr->IndexBufferSize = draw_data->TotalIdxCount + 10000; |
| D3D12_HEAP_PROPERTIES props; |
| memset(&props, 0, sizeof(D3D12_HEAP_PROPERTIES)); |
| props.Type = D3D12_HEAP_TYPE_UPLOAD; |
| props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN; |
| props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN; |
| D3D12_RESOURCE_DESC desc; |
| memset(&desc, 0, sizeof(D3D12_RESOURCE_DESC)); |
| desc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER; |
| desc.Width = fr->IndexBufferSize * sizeof(ImDrawIdx); |
| desc.Height = 1; |
| desc.DepthOrArraySize = 1; |
| desc.MipLevels = 1; |
| desc.Format = DXGI_FORMAT_UNKNOWN; |
| desc.SampleDesc.Count = 1; |
| desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR; |
| desc.Flags = D3D12_RESOURCE_FLAG_NONE; |
| if (g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&fr->IndexBuffer)) < 0) |
| return; |
| } |
| |
| // Upload vertex/index data into a single contiguous GPU buffer |
| void* vtx_resource, *idx_resource; |
| D3D12_RANGE range; |
| memset(&range, 0, sizeof(D3D12_RANGE)); |
| if (fr->VertexBuffer->Map(0, &range, &vtx_resource) != S_OK) |
| return; |
| if (fr->IndexBuffer->Map(0, &range, &idx_resource) != S_OK) |
| return; |
| ImDrawVert* vtx_dst = (ImDrawVert*)vtx_resource; |
| ImDrawIdx* idx_dst = (ImDrawIdx*)idx_resource; |
| 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; |
| } |
| fr->VertexBuffer->Unmap(0, &range); |
| fr->IndexBuffer->Unmap(0, &range); |
| |
| // Setup desired DX state |
| ImGui_ImplDX12_SetupRenderState(draw_data, ctx, fr); |
| |
| // Render command lists |
| // (Because we merged all buffers into a single one, we maintain our own offset into them) |
| int global_vtx_offset = 0; |
| int global_idx_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_ImplDX12_SetupRenderState(draw_data, ctx, fr); |
| else |
| pcmd->UserCallback(cmd_list, pcmd); |
| } |
| else |
| { |
| // Apply Scissor, Bind texture, Draw |
| const D3D12_RECT r = { (LONG)(pcmd->ClipRect.x - clip_off.x), (LONG)(pcmd->ClipRect.y - clip_off.y), (LONG)(pcmd->ClipRect.z - clip_off.x), (LONG)(pcmd->ClipRect.w - clip_off.y) }; |
| ctx->SetGraphicsRootDescriptorTable(1, *(D3D12_GPU_DESCRIPTOR_HANDLE*)&pcmd->TextureId); |
| ctx->RSSetScissorRects(1, &r); |
| ctx->DrawIndexedInstanced(pcmd->ElemCount, 1, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset, 0); |
| } |
| } |
| global_idx_offset += cmd_list->IdxBuffer.Size; |
| global_vtx_offset += cmd_list->VtxBuffer.Size; |
| } |
| } |
| |
| static void ImGui_ImplDX12_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 |
| { |
| D3D12_HEAP_PROPERTIES props; |
| memset(&props, 0, sizeof(D3D12_HEAP_PROPERTIES)); |
| props.Type = D3D12_HEAP_TYPE_DEFAULT; |
| props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN; |
| props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN; |
| |
| D3D12_RESOURCE_DESC desc; |
| ZeroMemory(&desc, sizeof(desc)); |
| desc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D; |
| desc.Alignment = 0; |
| desc.Width = width; |
| desc.Height = height; |
| desc.DepthOrArraySize = 1; |
| desc.MipLevels = 1; |
| desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; |
| desc.SampleDesc.Count = 1; |
| desc.SampleDesc.Quality = 0; |
| desc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN; |
| desc.Flags = D3D12_RESOURCE_FLAG_NONE; |
| |
| ID3D12Resource* pTexture = NULL; |
| g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc, |
| D3D12_RESOURCE_STATE_COPY_DEST, NULL, IID_PPV_ARGS(&pTexture)); |
| |
| UINT uploadPitch = (width * 4 + D3D12_TEXTURE_DATA_PITCH_ALIGNMENT - 1u) & ~(D3D12_TEXTURE_DATA_PITCH_ALIGNMENT - 1u); |
| UINT uploadSize = height * uploadPitch; |
| desc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER; |
| desc.Alignment = 0; |
| desc.Width = uploadSize; |
| desc.Height = 1; |
| desc.DepthOrArraySize = 1; |
| desc.MipLevels = 1; |
| desc.Format = DXGI_FORMAT_UNKNOWN; |
| desc.SampleDesc.Count = 1; |
| desc.SampleDesc.Quality = 0; |
| desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR; |
| desc.Flags = D3D12_RESOURCE_FLAG_NONE; |
| |
| props.Type = D3D12_HEAP_TYPE_UPLOAD; |
| props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN; |
| props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN; |
| |
| ID3D12Resource* uploadBuffer = NULL; |
| HRESULT hr = g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc, |
| D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&uploadBuffer)); |
| IM_ASSERT(SUCCEEDED(hr)); |
| |
| void* mapped = NULL; |
| D3D12_RANGE range = { 0, uploadSize }; |
| hr = uploadBuffer->Map(0, &range, &mapped); |
| IM_ASSERT(SUCCEEDED(hr)); |
| for (int y = 0; y < height; y++) |
| memcpy((void*) ((uintptr_t) mapped + y * uploadPitch), pixels + y * width * 4, width * 4); |
| uploadBuffer->Unmap(0, &range); |
| |
| D3D12_TEXTURE_COPY_LOCATION srcLocation = {}; |
| srcLocation.pResource = uploadBuffer; |
| srcLocation.Type = D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT; |
| srcLocation.PlacedFootprint.Footprint.Format = DXGI_FORMAT_R8G8B8A8_UNORM; |
| srcLocation.PlacedFootprint.Footprint.Width = width; |
| srcLocation.PlacedFootprint.Footprint.Height = height; |
| srcLocation.PlacedFootprint.Footprint.Depth = 1; |
| srcLocation.PlacedFootprint.Footprint.RowPitch = uploadPitch; |
| |
| D3D12_TEXTURE_COPY_LOCATION dstLocation = {}; |
| dstLocation.pResource = pTexture; |
| dstLocation.Type = D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX; |
| dstLocation.SubresourceIndex = 0; |
| |
| D3D12_RESOURCE_BARRIER barrier = {}; |
| barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION; |
| barrier.Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE; |
| barrier.Transition.pResource = pTexture; |
| barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES; |
| barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_COPY_DEST; |
| barrier.Transition.StateAfter = D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE; |
| |
| ID3D12Fence* fence = NULL; |
| hr = g_pd3dDevice->CreateFence(0, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(&fence)); |
| IM_ASSERT(SUCCEEDED(hr)); |
| |
| HANDLE event = CreateEvent(0, 0, 0, 0); |
| IM_ASSERT(event != NULL); |
| |
| D3D12_COMMAND_QUEUE_DESC queueDesc = {}; |
| queueDesc.Type = D3D12_COMMAND_LIST_TYPE_DIRECT; |
| queueDesc.Flags = D3D12_COMMAND_QUEUE_FLAG_NONE; |
| queueDesc.NodeMask = 1; |
| |
| ID3D12CommandQueue* cmdQueue = NULL; |
| hr = g_pd3dDevice->CreateCommandQueue(&queueDesc, IID_PPV_ARGS(&cmdQueue)); |
| IM_ASSERT(SUCCEEDED(hr)); |
| |
| ID3D12CommandAllocator* cmdAlloc = NULL; |
| hr = g_pd3dDevice->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&cmdAlloc)); |
| IM_ASSERT(SUCCEEDED(hr)); |
| |
| ID3D12GraphicsCommandList* cmdList = NULL; |
| hr = g_pd3dDevice->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, cmdAlloc, NULL, IID_PPV_ARGS(&cmdList)); |
| IM_ASSERT(SUCCEEDED(hr)); |
| |
| cmdList->CopyTextureRegion(&dstLocation, 0, 0, 0, &srcLocation, NULL); |
| cmdList->ResourceBarrier(1, &barrier); |
| |
| hr = cmdList->Close(); |
| IM_ASSERT(SUCCEEDED(hr)); |
| |
| cmdQueue->ExecuteCommandLists(1, (ID3D12CommandList* const*) &cmdList); |
| hr = cmdQueue->Signal(fence, 1); |
| IM_ASSERT(SUCCEEDED(hr)); |
| |
| fence->SetEventOnCompletion(1, event); |
| WaitForSingleObject(event, INFINITE); |
| |
| cmdList->Release(); |
| cmdAlloc->Release(); |
| cmdQueue->Release(); |
| CloseHandle(event); |
| fence->Release(); |
| uploadBuffer->Release(); |
| |
| // Create texture view |
| D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc; |
| ZeroMemory(&srvDesc, sizeof(srvDesc)); |
| srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; |
| srvDesc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D; |
| srvDesc.Texture2D.MipLevels = desc.MipLevels; |
| srvDesc.Texture2D.MostDetailedMip = 0; |
| srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING; |
| g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, g_hFontSrvCpuDescHandle); |
| if (g_pFontTextureResource != NULL) |
| g_pFontTextureResource->Release(); |
| g_pFontTextureResource = pTexture; |
| } |
| |
| // Store our identifier |
| static_assert(sizeof(ImTextureID) >= sizeof(g_hFontSrvGpuDescHandle.ptr), "Can't pack descriptor handle into TexID, 32-bit not supported yet."); |
| io.Fonts->TexID = (ImTextureID)g_hFontSrvGpuDescHandle.ptr; |
| } |
| |
| bool ImGui_ImplDX12_CreateDeviceObjects() |
| { |
| if (!g_pd3dDevice) |
| return false; |
| if (g_pPipelineState) |
| ImGui_ImplDX12_InvalidateDeviceObjects(); |
| |
| // Create the root signature |
| { |
| D3D12_DESCRIPTOR_RANGE descRange = {}; |
| descRange.RangeType = D3D12_DESCRIPTOR_RANGE_TYPE_SRV; |
| descRange.NumDescriptors = 1; |
| descRange.BaseShaderRegister = 0; |
| descRange.RegisterSpace = 0; |
| descRange.OffsetInDescriptorsFromTableStart = 0; |
| |
| D3D12_ROOT_PARAMETER param[2] = {}; |
| |
| param[0].ParameterType = D3D12_ROOT_PARAMETER_TYPE_32BIT_CONSTANTS; |
| param[0].Constants.ShaderRegister = 0; |
| param[0].Constants.RegisterSpace = 0; |
| param[0].Constants.Num32BitValues = 16; |
| param[0].ShaderVisibility = D3D12_SHADER_VISIBILITY_VERTEX; |
| |
| param[1].ParameterType = D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE; |
| param[1].DescriptorTable.NumDescriptorRanges = 1; |
| param[1].DescriptorTable.pDescriptorRanges = &descRange; |
| param[1].ShaderVisibility = D3D12_SHADER_VISIBILITY_PIXEL; |
| |
| D3D12_STATIC_SAMPLER_DESC staticSampler = {}; |
| staticSampler.Filter = D3D12_FILTER_MIN_MAG_MIP_LINEAR; |
| staticSampler.AddressU = D3D12_TEXTURE_ADDRESS_MODE_WRAP; |
| staticSampler.AddressV = D3D12_TEXTURE_ADDRESS_MODE_WRAP; |
| staticSampler.AddressW = D3D12_TEXTURE_ADDRESS_MODE_WRAP; |
| staticSampler.MipLODBias = 0.f; |
| staticSampler.MaxAnisotropy = 0; |
| staticSampler.ComparisonFunc = D3D12_COMPARISON_FUNC_ALWAYS; |
| staticSampler.BorderColor = D3D12_STATIC_BORDER_COLOR_TRANSPARENT_BLACK; |
| staticSampler.MinLOD = 0.f; |
| staticSampler.MaxLOD = 0.f; |
| staticSampler.ShaderRegister = 0; |
| staticSampler.RegisterSpace = 0; |
| staticSampler.ShaderVisibility = D3D12_SHADER_VISIBILITY_PIXEL; |
| |
| D3D12_ROOT_SIGNATURE_DESC desc = {}; |
| desc.NumParameters = _countof(param); |
| desc.pParameters = param; |
| desc.NumStaticSamplers = 1; |
| desc.pStaticSamplers = &staticSampler; |
| desc.Flags = |
| D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT | |
| D3D12_ROOT_SIGNATURE_FLAG_DENY_HULL_SHADER_ROOT_ACCESS | |
| D3D12_ROOT_SIGNATURE_FLAG_DENY_DOMAIN_SHADER_ROOT_ACCESS | |
| D3D12_ROOT_SIGNATURE_FLAG_DENY_GEOMETRY_SHADER_ROOT_ACCESS; |
| |
| ID3DBlob* blob = NULL; |
| if (D3D12SerializeRootSignature(&desc, D3D_ROOT_SIGNATURE_VERSION_1, &blob, NULL) != S_OK) |
| return false; |
| |
| g_pd3dDevice->CreateRootSignature(0, blob->GetBufferPointer(), blob->GetBufferSize(), IID_PPV_ARGS(&g_pRootSignature)); |
| blob->Release(); |
| } |
| |
| // 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 DX12 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. |
| |
| D3D12_GRAPHICS_PIPELINE_STATE_DESC psoDesc; |
| memset(&psoDesc, 0, sizeof(D3D12_GRAPHICS_PIPELINE_STATE_DESC)); |
| psoDesc.NodeMask = 1; |
| psoDesc.PrimitiveTopologyType = D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE; |
| psoDesc.pRootSignature = g_pRootSignature; |
| psoDesc.SampleMask = UINT_MAX; |
| psoDesc.NumRenderTargets = 1; |
| psoDesc.RTVFormats[0] = g_RTVFormat; |
| psoDesc.SampleDesc.Count = 1; |
| psoDesc.Flags = D3D12_PIPELINE_STATE_FLAG_NONE; |
| |
| // 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_5_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; |
| psoDesc.VS = { g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize() }; |
| |
| // Create the input layout |
| static D3D12_INPUT_ELEMENT_DESC local_layout[] = { |
| { "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT, 0, IM_OFFSETOF(ImDrawVert, pos), D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 }, |
| { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, IM_OFFSETOF(ImDrawVert, uv), D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 }, |
| { "COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, IM_OFFSETOF(ImDrawVert, col), D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 }, |
| }; |
| psoDesc.InputLayout = { local_layout, 3 }; |
| } |
| |
| // Create the pixel shader |
| { |
| static const char* pixelShader = |
| "struct PS_INPUT\ |
| {\ |
| float4 pos : SV_POSITION;\ |
| float4 col : COLOR0;\ |
| float2 uv : TEXCOORD0;\ |
| };\ |
| SamplerState sampler0 : register(s0);\ |
| Texture2D texture0 : register(t0);\ |
| \ |
| 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_5_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; |
| psoDesc.PS = { g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize() }; |
| } |
| |
| // Create the blending setup |
| { |
| D3D12_BLEND_DESC& desc = psoDesc.BlendState; |
| desc.AlphaToCoverageEnable = false; |
| desc.RenderTarget[0].BlendEnable = true; |
| desc.RenderTarget[0].SrcBlend = D3D12_BLEND_SRC_ALPHA; |
| desc.RenderTarget[0].DestBlend = D3D12_BLEND_INV_SRC_ALPHA; |
| desc.RenderTarget[0].BlendOp = D3D12_BLEND_OP_ADD; |
| desc.RenderTarget[0].SrcBlendAlpha = D3D12_BLEND_INV_SRC_ALPHA; |
| desc.RenderTarget[0].DestBlendAlpha = D3D12_BLEND_ZERO; |
| desc.RenderTarget[0].BlendOpAlpha = D3D12_BLEND_OP_ADD; |
| desc.RenderTarget[0].RenderTargetWriteMask = D3D12_COLOR_WRITE_ENABLE_ALL; |
| } |
| |
| // Create the rasterizer state |
| { |
| D3D12_RASTERIZER_DESC& desc = psoDesc.RasterizerState; |
| desc.FillMode = D3D12_FILL_MODE_SOLID; |
| desc.CullMode = D3D12_CULL_MODE_NONE; |
| desc.FrontCounterClockwise = FALSE; |
| desc.DepthBias = D3D12_DEFAULT_DEPTH_BIAS; |
| desc.DepthBiasClamp = D3D12_DEFAULT_DEPTH_BIAS_CLAMP; |
| desc.SlopeScaledDepthBias = D3D12_DEFAULT_SLOPE_SCALED_DEPTH_BIAS; |
| desc.DepthClipEnable = true; |
| desc.MultisampleEnable = FALSE; |
| desc.AntialiasedLineEnable = FALSE; |
| desc.ForcedSampleCount = 0; |
| desc.ConservativeRaster = D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF; |
| } |
| |
| // Create depth-stencil State |
| { |
| D3D12_DEPTH_STENCIL_DESC& desc = psoDesc.DepthStencilState; |
| desc.DepthEnable = false; |
| desc.DepthWriteMask = D3D12_DEPTH_WRITE_MASK_ALL; |
| desc.DepthFunc = D3D12_COMPARISON_FUNC_ALWAYS; |
| desc.StencilEnable = false; |
| desc.FrontFace.StencilFailOp = desc.FrontFace.StencilDepthFailOp = desc.FrontFace.StencilPassOp = D3D12_STENCIL_OP_KEEP; |
| desc.FrontFace.StencilFunc = D3D12_COMPARISON_FUNC_ALWAYS; |
| desc.BackFace = desc.FrontFace; |
| } |
| |
| if (g_pd3dDevice->CreateGraphicsPipelineState(&psoDesc, IID_PPV_ARGS(&g_pPipelineState)) != S_OK) |
| return false; |
| |
| ImGui_ImplDX12_CreateFontsTexture(); |
| |
| return true; |
| } |
| |
| void ImGui_ImplDX12_InvalidateDeviceObjects() |
| { |
| if (!g_pd3dDevice) |
| return; |
| |
| ImGuiIO& io = ImGui::GetIO(); |
| if (g_pVertexShaderBlob) { g_pVertexShaderBlob->Release(); g_pVertexShaderBlob = NULL; } |
| if (g_pPixelShaderBlob) { g_pPixelShaderBlob->Release(); g_pPixelShaderBlob = NULL; } |
| if (g_pRootSignature) { g_pRootSignature->Release(); g_pRootSignature = NULL; } |
| if (g_pPipelineState) { g_pPipelineState->Release(); g_pPipelineState = NULL; } |
| if (g_pFontTextureResource) { g_pFontTextureResource->Release(); g_pFontTextureResource = NULL; io.Fonts->TexID = NULL; } // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well. |
| for (UINT i = 0; i < g_numFramesInFlight; i++) |
| { |
| FrameResources* fr = &g_pFrameResources[i]; |
| if (fr->IndexBuffer) { fr->IndexBuffer->Release(); fr->IndexBuffer = NULL; } |
| if (fr->VertexBuffer) { fr->VertexBuffer->Release(); fr->VertexBuffer = NULL; } |
| } |
| } |
| |
| bool ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FORMAT rtv_format, |
| D3D12_CPU_DESCRIPTOR_HANDLE font_srv_cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE font_srv_gpu_desc_handle) |
| { |
| // Setup back-end capabilities flags |
| ImGuiIO& io = ImGui::GetIO(); |
| io.BackendRendererName = "imgui_impl_dx12"; |
| io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes. |
| |
| g_pd3dDevice = device; |
| g_RTVFormat = rtv_format; |
| g_hFontSrvCpuDescHandle = font_srv_cpu_desc_handle; |
| g_hFontSrvGpuDescHandle = font_srv_gpu_desc_handle; |
| g_pFrameResources = new FrameResources[num_frames_in_flight]; |
| g_numFramesInFlight = num_frames_in_flight; |
| g_frameIndex = UINT_MAX; |
| |
| // Create buffers with a default size (they will later be grown as needed) |
| for (int i = 0; i < num_frames_in_flight; i++) |
| { |
| FrameResources* fr = &g_pFrameResources[i]; |
| fr->IndexBuffer = NULL; |
| fr->VertexBuffer = NULL; |
| fr->IndexBufferSize = 10000; |
| fr->VertexBufferSize = 5000; |
| } |
| |
| return true; |
| } |
| |
| void ImGui_ImplDX12_Shutdown() |
| { |
| ImGui_ImplDX12_InvalidateDeviceObjects(); |
| delete[] g_pFrameResources; |
| g_pFrameResources = NULL; |
| g_pd3dDevice = NULL; |
| g_hFontSrvCpuDescHandle.ptr = 0; |
| g_hFontSrvGpuDescHandle.ptr = 0; |
| g_numFramesInFlight = 0; |
| g_frameIndex = UINT_MAX; |
| } |
| |
| void ImGui_ImplDX12_NewFrame() |
| { |
| if (!g_pPipelineState) |
| ImGui_ImplDX12_CreateDeviceObjects(); |
| } |
