mirror of
https://github.com/Drezil/imgui.git
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668 lines
27 KiB
C++
668 lines
27 KiB
C++
// ImGui Win32 + DirectX12 binding
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// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
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// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
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// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
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// https://github.com/ocornut/imgui
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#include <imgui.h>
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#include "imgui_impl_dx12.h"
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// DirectX
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#include <d3d12.h>
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#include <d3dcompiler.h>
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struct FrameResources
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{
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ID3D12Resource* IB;
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ID3D12Resource* VB;
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int VertexBufferSize;
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int IndexBufferSize;
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};
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// Data
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static INT64 g_Time = 0;
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static INT64 g_TicksPerSecond = 0;
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static HWND g_hWnd = 0;
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static ID3D12Device* g_pd3dDevice = NULL;
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static ID3D12GraphicsCommandList* g_pd3dCommandList = NULL;
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static ID3D10Blob* g_pVertexShaderBlob = NULL;
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static ID3D10Blob* g_pPixelShaderBlob = NULL;
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static ID3D12RootSignature* g_pRootSignature = NULL;
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static ID3D12PipelineState* g_pPipelineState = NULL;
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static ID3D12Resource* g_pFontTextureResource = NULL;
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static D3D12_CPU_DESCRIPTOR_HANDLE g_hFontSrvCpuDescHandle = {};
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static D3D12_GPU_DESCRIPTOR_HANDLE g_hFontSrvGpuDescHandle = {};
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static FrameResources* g_pFrameResources = NULL;
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static UINT g_numFramesInFlight = 0;
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static UINT g_frameIndex = UINT_MAX;
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struct VERTEX_CONSTANT_BUFFER
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{
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float mvp[4][4];
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};
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// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
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// If text or lines are blurry when integrating ImGui in your engine:
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// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
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void ImGui_ImplDX12_RenderDrawLists(ImDrawData* draw_data)
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{
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// Create and grow vertex/index buffers if needed
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//
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// NOTE: I'm assuming that this only get's called once per frame! If not,
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// we can't just re-allocate the IB or VB, we'll have to do a proper
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// allocator.
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g_frameIndex = g_frameIndex + 1;
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FrameResources* frameResources = &g_pFrameResources[g_frameIndex % g_numFramesInFlight];
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D3D12_HEAP_PROPERTIES props = {};
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props.Type = D3D12_HEAP_TYPE_UPLOAD;
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props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;
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props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;
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D3D12_RESOURCE_DESC desc = {};
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desc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
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desc.Height = 1;
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desc.DepthOrArraySize = 1;
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desc.MipLevels = 1;
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desc.Format = DXGI_FORMAT_UNKNOWN;
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desc.SampleDesc.Count = 1;
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desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
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desc.Flags = D3D12_RESOURCE_FLAG_NONE;
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if (!frameResources->VB || frameResources->VertexBufferSize < draw_data->TotalVtxCount)
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{
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if (frameResources->VB) { frameResources->VB->Release(); frameResources->VB = NULL; }
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frameResources->VertexBufferSize = draw_data->TotalVtxCount + 5000;
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desc.Width = frameResources->VertexBufferSize * sizeof(ImDrawVert);
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HRESULT hr = g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&frameResources->VB));
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assert(SUCCEEDED(hr));
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}
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if (!frameResources->IB || frameResources->IndexBufferSize < draw_data->TotalIdxCount)
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{
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if (frameResources->IB) { frameResources->IB->Release(); frameResources->IB = NULL; }
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frameResources->IndexBufferSize = draw_data->TotalIdxCount + 10000;
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desc.Width = frameResources->IndexBufferSize * sizeof(ImDrawIdx);
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HRESULT hr = g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&frameResources->IB));
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assert(SUCCEEDED(hr));
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}
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// Copy and convert all vertices into a single contiguous buffer
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D3D12_RANGE range = {};
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void* vtx_resource = NULL;
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HRESULT hr = frameResources->VB->Map(0, &range, &vtx_resource);
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assert(SUCCEEDED(hr));
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void* idx_resource = NULL;
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hr = frameResources->IB->Map(0, &range, &idx_resource);
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assert(SUCCEEDED(hr));
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ImDrawVert* vtx_dst = (ImDrawVert*)vtx_resource;
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ImDrawIdx* idx_dst = (ImDrawIdx*)idx_resource;
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for (int n = 0; n < draw_data->CmdListsCount; n++)
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{
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const ImDrawList* cmd_list = draw_data->CmdLists[n];
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memcpy(vtx_dst, &cmd_list->VtxBuffer[0], cmd_list->VtxBuffer.size() * sizeof(ImDrawVert));
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memcpy(idx_dst, &cmd_list->IdxBuffer[0], cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx));
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vtx_dst += cmd_list->VtxBuffer.size();
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idx_dst += cmd_list->IdxBuffer.size();
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}
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frameResources->VB->Unmap(0, &range);
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frameResources->IB->Unmap(0, &range);
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// Setup orthographic projection matrix into our constant buffer
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VERTEX_CONSTANT_BUFFER vertexConstantBuffer = {};
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{
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const float L = 0.0f;
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const float R = ImGui::GetIO().DisplaySize.x;
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const float B = ImGui::GetIO().DisplaySize.y;
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const float T = 0.0f;
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const float mvp[4][4] =
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{
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{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
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{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
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{ 0.0f, 0.0f, 0.5f, 0.0f },
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{ (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f },
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};
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memcpy(&vertexConstantBuffer.mvp, mvp, sizeof(mvp));
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}
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// Setup viewport
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D3D12_VIEWPORT viewport = {};
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viewport.Width = ImGui::GetIO().DisplaySize.x;
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viewport.Height = ImGui::GetIO().DisplaySize.y;
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viewport.MinDepth = 0.0f;
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viewport.MaxDepth = 1.0f;
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viewport.TopLeftX = 0;
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viewport.TopLeftY = 0;
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// Bind shader and vertex buffers
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D3D12_VERTEX_BUFFER_VIEW vbv = {};
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vbv.BufferLocation = frameResources->VB->GetGPUVirtualAddress();
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vbv.SizeInBytes = frameResources->VertexBufferSize * sizeof(ImDrawVert);
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vbv.StrideInBytes = sizeof(ImDrawVert);
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D3D12_INDEX_BUFFER_VIEW ibv = {};
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ibv.BufferLocation = frameResources->IB->GetGPUVirtualAddress();
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ibv.SizeInBytes = frameResources->IndexBufferSize * sizeof(ImDrawIdx);
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ibv.Format = sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT;
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FLOAT blendFactor[4] = { 0.f, 0.f, 0.f, 0.f };
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g_pd3dCommandList->SetPipelineState(g_pPipelineState);
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g_pd3dCommandList->SetGraphicsRootSignature(g_pRootSignature);
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g_pd3dCommandList->SetGraphicsRoot32BitConstants(0, 16, &vertexConstantBuffer, 0);
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g_pd3dCommandList->IASetIndexBuffer(&ibv);
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g_pd3dCommandList->IASetVertexBuffers(0, 1, &vbv);
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g_pd3dCommandList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
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g_pd3dCommandList->RSSetViewports(1, &viewport);
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g_pd3dCommandList->OMSetBlendFactor(blendFactor);
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// Render command lists
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int vtx_offset = 0;
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int idx_offset = 0;
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for (int n = 0; n < draw_data->CmdListsCount; n++)
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{
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const ImDrawList* cmd_list = draw_data->CmdLists[n];
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for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
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{
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const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
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if (pcmd->UserCallback)
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{
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pcmd->UserCallback(cmd_list, pcmd);
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}
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else
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{
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D3D12_RECT scissorRect = { (LONG)pcmd->ClipRect.x, (LONG)pcmd->ClipRect.y, (LONG)pcmd->ClipRect.z, (LONG)pcmd->ClipRect.w };
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D3D12_GPU_DESCRIPTOR_HANDLE srvHandle = {};
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srvHandle.ptr = (UINT64) pcmd->TextureId;
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g_pd3dCommandList->SetGraphicsRootDescriptorTable(1, srvHandle);
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g_pd3dCommandList->RSSetScissorRects(1, &scissorRect);
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g_pd3dCommandList->DrawIndexedInstanced(pcmd->ElemCount, 1, idx_offset, vtx_offset, 0);
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}
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idx_offset += pcmd->ElemCount;
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}
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vtx_offset += cmd_list->VtxBuffer.size();
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}
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}
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IMGUI_API LRESULT ImGui_ImplDX12_WndProcHandler(HWND, UINT msg, WPARAM wParam, LPARAM lParam)
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{
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ImGuiIO& io = ImGui::GetIO();
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switch (msg)
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{
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case WM_LBUTTONDOWN:
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io.MouseDown[0] = true;
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return true;
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case WM_LBUTTONUP:
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io.MouseDown[0] = false;
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return true;
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case WM_RBUTTONDOWN:
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io.MouseDown[1] = true;
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return true;
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case WM_RBUTTONUP:
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io.MouseDown[1] = false;
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return true;
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case WM_MBUTTONDOWN:
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io.MouseDown[2] = true;
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return true;
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case WM_MBUTTONUP:
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io.MouseDown[2] = false;
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return true;
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case WM_MOUSEWHEEL:
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io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
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return true;
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case WM_MOUSEMOVE:
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io.MousePos.x = (signed short)(lParam);
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io.MousePos.y = (signed short)(lParam >> 16);
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return true;
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case WM_KEYDOWN:
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if (wParam < 256)
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io.KeysDown[wParam] = 1;
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return true;
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case WM_KEYUP:
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if (wParam < 256)
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io.KeysDown[wParam] = 0;
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return true;
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case WM_CHAR:
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// You can also use ToAscii()+GetKeyboardState() to retrieve characters.
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if (wParam > 0 && wParam < 0x10000)
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io.AddInputCharacter((unsigned short)wParam);
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return true;
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}
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return 0;
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}
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static void ImGui_ImplDX12_CreateFontsTexture()
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{
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// Build texture atlas
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ImGuiIO& io = ImGui::GetIO();
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unsigned char* pixels;
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int width, height;
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io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
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// Upload texture to graphics system
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{
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D3D12_RESOURCE_DESC resourceDesc = {};
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resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
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resourceDesc.Alignment = 0;
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resourceDesc.Width = width;
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resourceDesc.Height = height;
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resourceDesc.DepthOrArraySize = 1;
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resourceDesc.MipLevels = 1;
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resourceDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
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resourceDesc.SampleDesc.Count = 1;
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resourceDesc.SampleDesc.Quality = 0;
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resourceDesc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN;
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resourceDesc.Flags = D3D12_RESOURCE_FLAG_NONE;
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D3D12_HEAP_PROPERTIES props = {};
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props.Type = D3D12_HEAP_TYPE_DEFAULT;
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props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;
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props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;
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HRESULT hr = g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &resourceDesc,
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D3D12_RESOURCE_STATE_COPY_DEST, NULL, IID_PPV_ARGS(&g_pFontTextureResource));
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assert(SUCCEEDED(hr));
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UINT uploadPitch = (width * 4 + D3D12_TEXTURE_DATA_PITCH_ALIGNMENT - 1u) & ~(D3D12_TEXTURE_DATA_PITCH_ALIGNMENT - 1u);
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UINT uploadSize = height * uploadPitch;
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resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
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resourceDesc.Alignment = 0;
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resourceDesc.Width = uploadSize;
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resourceDesc.Height = 1;
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resourceDesc.DepthOrArraySize = 1;
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resourceDesc.MipLevels = 1;
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resourceDesc.Format = DXGI_FORMAT_UNKNOWN;
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resourceDesc.SampleDesc.Count = 1;
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resourceDesc.SampleDesc.Quality = 0;
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resourceDesc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
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resourceDesc.Flags = D3D12_RESOURCE_FLAG_NONE;
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props.Type = D3D12_HEAP_TYPE_UPLOAD;
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props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;
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props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;
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ID3D12Resource* uploadBuffer = NULL;
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hr = g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &resourceDesc,
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D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&uploadBuffer));
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assert(SUCCEEDED(hr));
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void* mapped = NULL;
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D3D12_RANGE range = { 0, uploadSize };
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hr = uploadBuffer->Map(0, &range, &mapped);
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assert(SUCCEEDED(hr));
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for (int y = 0; y < height; ++y)
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{
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memcpy((void*) ((uintptr_t) mapped + y * uploadPitch), pixels + y * width * 4, width * 4);
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}
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uploadBuffer->Unmap(0, &range);
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D3D12_TEXTURE_COPY_LOCATION srcLocation = {};
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srcLocation.pResource = uploadBuffer;
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srcLocation.Type = D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT;
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srcLocation.PlacedFootprint.Footprint.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
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srcLocation.PlacedFootprint.Footprint.Width = width;
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srcLocation.PlacedFootprint.Footprint.Height = height;
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srcLocation.PlacedFootprint.Footprint.Depth = 1;
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srcLocation.PlacedFootprint.Footprint.RowPitch = uploadPitch;
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D3D12_TEXTURE_COPY_LOCATION dstLocation = {};
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dstLocation.pResource = g_pFontTextureResource;
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dstLocation.Type = D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX;
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dstLocation.SubresourceIndex = 0;
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D3D12_RESOURCE_BARRIER barrier = {};
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barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
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barrier.Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE;
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barrier.Transition.pResource = g_pFontTextureResource;
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barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
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barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_COPY_DEST;
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barrier.Transition.StateAfter = D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE;
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ID3D12Fence* fence = NULL;
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hr = g_pd3dDevice->CreateFence(0, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(&fence));
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assert(SUCCEEDED(hr));
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HANDLE event = CreateEvent(0, 0, 0, 0);
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assert(event != NULL);
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D3D12_COMMAND_QUEUE_DESC queueDesc = {};
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queueDesc.Type = D3D12_COMMAND_LIST_TYPE_DIRECT;
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queueDesc.Flags = D3D12_COMMAND_QUEUE_FLAG_NONE;
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queueDesc.NodeMask = 1;
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ID3D12CommandQueue* cmdQueue = NULL;
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hr = g_pd3dDevice->CreateCommandQueue(&queueDesc, IID_PPV_ARGS(&cmdQueue));
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assert(SUCCEEDED(hr));
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ID3D12CommandAllocator* cmdAlloc = NULL;
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hr = g_pd3dDevice->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&cmdAlloc));
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assert(SUCCEEDED(hr));
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ID3D12GraphicsCommandList* cmdList = NULL;
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hr = g_pd3dDevice->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, cmdAlloc, NULL, IID_PPV_ARGS(&cmdList));
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assert(SUCCEEDED(hr));
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cmdList->CopyTextureRegion(&dstLocation, 0, 0, 0, &srcLocation, NULL);
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cmdList->ResourceBarrier(1, &barrier);
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hr = cmdList->Close();
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assert(SUCCEEDED(hr));
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cmdQueue->ExecuteCommandLists(1, (ID3D12CommandList* const*) &cmdList);
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hr = cmdQueue->Signal(fence, 1);
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assert(SUCCEEDED(hr));
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fence->SetEventOnCompletion(1, event);
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WaitForSingleObject(event, INFINITE);
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cmdList->Release();
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cmdAlloc->Release();
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cmdQueue->Release();
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CloseHandle(event);
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fence->Release();
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uploadBuffer->Release();
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}
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// Create texture view
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g_pd3dDevice->CreateShaderResourceView(g_pFontTextureResource, NULL, g_hFontSrvCpuDescHandle);
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// Store our identifier
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static_assert(sizeof(void*) >= sizeof(g_hFontSrvGpuDescHandle.ptr), "Can't pack descriptor handle into TexID");
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ImGui::GetIO().Fonts->TexID = (void*) g_hFontSrvGpuDescHandle.ptr;
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}
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bool ImGui_ImplDX12_CreateDeviceObjects()
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{
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if (!g_pd3dDevice)
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return false;
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if (g_pPipelineState)
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ImGui_ImplDX12_InvalidateDeviceObjects();
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// Create the root signature
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{
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D3D12_DESCRIPTOR_RANGE descRange = {};
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descRange.RangeType = D3D12_DESCRIPTOR_RANGE_TYPE_SRV;
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descRange.NumDescriptors = 1;
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descRange.BaseShaderRegister = 0;
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descRange.RegisterSpace = 0;
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descRange.OffsetInDescriptorsFromTableStart = 0;
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D3D12_ROOT_PARAMETER param[2] = {};
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param[0].ParameterType = D3D12_ROOT_PARAMETER_TYPE_32BIT_CONSTANTS;
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param[0].Constants.ShaderRegister = 0;
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param[0].Constants.RegisterSpace = 0;
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param[0].Constants.Num32BitValues = 16;
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param[0].ShaderVisibility = D3D12_SHADER_VISIBILITY_VERTEX;
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param[1].ParameterType = D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE;
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param[1].DescriptorTable.NumDescriptorRanges = 1;
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param[1].DescriptorTable.pDescriptorRanges = &descRange;
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param[1].ShaderVisibility = D3D12_SHADER_VISIBILITY_PIXEL;
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D3D12_STATIC_SAMPLER_DESC staticSampler = {};
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staticSampler.Filter = D3D12_FILTER_MIN_MAG_MIP_LINEAR;
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staticSampler.AddressU = D3D12_TEXTURE_ADDRESS_MODE_WRAP;
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staticSampler.AddressV = D3D12_TEXTURE_ADDRESS_MODE_WRAP;
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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();
|
|
}
|
|
// Create the pipeline state object
|
|
{
|
|
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;\
|
|
}";
|
|
|
|
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(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;
|
|
|
|
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;
|
|
|
|
D3D12_INPUT_ELEMENT_DESC localLayout[] = {
|
|
{ "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT, 0, (size_t)(&((ImDrawVert*)0)->pos), D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
|
|
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, (size_t)(&((ImDrawVert*)0)->uv), D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
|
|
{ "COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (size_t)(&((ImDrawVert*)0)->col), D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
|
|
};
|
|
|
|
D3D12_GRAPHICS_PIPELINE_STATE_DESC desc = {};
|
|
desc.NodeMask = 1;
|
|
desc.PrimitiveTopologyType = D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE;
|
|
desc.InputLayout = { localLayout, _countof(localLayout) };
|
|
desc.pRootSignature = g_pRootSignature;
|
|
desc.VS = { g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize() };
|
|
desc.PS = { g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize() };
|
|
desc.SampleMask = UINT_MAX;
|
|
desc.NumRenderTargets = 1;
|
|
desc.RTVFormats[0] = DXGI_FORMAT_B8G8R8A8_UNORM;
|
|
desc.SampleDesc.Count = 1;
|
|
desc.Flags = D3D12_PIPELINE_STATE_FLAG_NONE;
|
|
|
|
desc.RasterizerState.FillMode = D3D12_FILL_MODE_SOLID;
|
|
desc.RasterizerState.CullMode = D3D12_CULL_MODE_NONE;
|
|
desc.RasterizerState.FrontCounterClockwise = FALSE;
|
|
desc.RasterizerState.DepthBias = D3D12_DEFAULT_DEPTH_BIAS;
|
|
desc.RasterizerState.DepthBiasClamp = D3D12_DEFAULT_DEPTH_BIAS_CLAMP;
|
|
desc.RasterizerState.SlopeScaledDepthBias = D3D12_DEFAULT_SLOPE_SCALED_DEPTH_BIAS;
|
|
desc.RasterizerState.DepthClipEnable = TRUE;
|
|
desc.RasterizerState.MultisampleEnable = FALSE;
|
|
desc.RasterizerState.AntialiasedLineEnable = FALSE;
|
|
desc.RasterizerState.ForcedSampleCount = 0;
|
|
desc.RasterizerState.ConservativeRaster = D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF;
|
|
|
|
desc.BlendState.AlphaToCoverageEnable = FALSE;
|
|
desc.BlendState.RenderTarget[0].BlendEnable = TRUE;
|
|
desc.BlendState.RenderTarget[0].SrcBlend = D3D12_BLEND_SRC_ALPHA;
|
|
desc.BlendState.RenderTarget[0].DestBlend = D3D12_BLEND_INV_SRC_ALPHA;
|
|
desc.BlendState.RenderTarget[0].BlendOp = D3D12_BLEND_OP_ADD;
|
|
desc.BlendState.RenderTarget[0].SrcBlendAlpha = D3D12_BLEND_INV_SRC_ALPHA;
|
|
desc.BlendState.RenderTarget[0].DestBlendAlpha = D3D12_BLEND_ZERO;
|
|
desc.BlendState.RenderTarget[0].BlendOpAlpha = D3D12_BLEND_OP_ADD;
|
|
desc.BlendState.RenderTarget[0].RenderTargetWriteMask = D3D12_COLOR_WRITE_ENABLE_ALL;
|
|
|
|
desc.DepthStencilState.DepthEnable = FALSE;
|
|
desc.DepthStencilState.StencilEnable = FALSE;
|
|
|
|
HRESULT hr = g_pd3dDevice->CreateGraphicsPipelineState(&desc, IID_PPV_ARGS(&g_pPipelineState));
|
|
assert(SUCCEEDED(hr));
|
|
}
|
|
|
|
ImGui_ImplDX12_CreateFontsTexture();
|
|
|
|
return true;
|
|
}
|
|
|
|
void ImGui_ImplDX12_InvalidateDeviceObjects()
|
|
{
|
|
if (!g_pd3dDevice)
|
|
return;
|
|
|
|
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; }
|
|
for (UINT i = 0; i < g_numFramesInFlight; ++i)
|
|
{
|
|
if (g_pFrameResources[i].IB) { g_pFrameResources[i].IB->Release(); g_pFrameResources[i].IB = NULL; }
|
|
if (g_pFrameResources[i].VB) { g_pFrameResources[i].VB->Release(); g_pFrameResources[i].VB = NULL; }
|
|
}
|
|
ImGui::GetIO().Fonts->TexID = 0;
|
|
}
|
|
|
|
bool ImGui_ImplDX12_Init(void* hwnd, int numFramesInFlight,
|
|
ID3D12Device* device, ID3D12GraphicsCommandList* cmdList,
|
|
D3D12_CPU_DESCRIPTOR_HANDLE fontSrvCpuDescHandle,
|
|
D3D12_GPU_DESCRIPTOR_HANDLE fontSrvGpuDescHandle)
|
|
{
|
|
g_hWnd = (HWND)hwnd;
|
|
g_pd3dDevice = device;
|
|
g_pd3dCommandList = cmdList;
|
|
g_hFontSrvCpuDescHandle = fontSrvCpuDescHandle;
|
|
g_hFontSrvGpuDescHandle = fontSrvGpuDescHandle;
|
|
g_pFrameResources = new FrameResources [numFramesInFlight];
|
|
g_numFramesInFlight = numFramesInFlight;
|
|
g_frameIndex = UINT_MAX;
|
|
|
|
for (int i = 0; i < numFramesInFlight; ++i)
|
|
{
|
|
g_pFrameResources[i].IB = NULL;
|
|
g_pFrameResources[i].VB = NULL;
|
|
g_pFrameResources[i].VertexBufferSize = 5000;
|
|
g_pFrameResources[i].IndexBufferSize = 10000;
|
|
}
|
|
|
|
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond))
|
|
return false;
|
|
if (!QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
|
|
return false;
|
|
|
|
ImGuiIO& io = ImGui::GetIO();
|
|
io.KeyMap[ImGuiKey_Tab] = VK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array that we will update during the application lifetime.
|
|
io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
|
|
io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
|
|
io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
|
|
io.KeyMap[ImGuiKey_DownArrow] = VK_DOWN;
|
|
io.KeyMap[ImGuiKey_PageUp] = VK_PRIOR;
|
|
io.KeyMap[ImGuiKey_PageDown] = VK_NEXT;
|
|
io.KeyMap[ImGuiKey_Home] = VK_HOME;
|
|
io.KeyMap[ImGuiKey_End] = VK_END;
|
|
io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
|
|
io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
|
|
io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
|
|
io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
|
|
io.KeyMap[ImGuiKey_A] = 'A';
|
|
io.KeyMap[ImGuiKey_C] = 'C';
|
|
io.KeyMap[ImGuiKey_V] = 'V';
|
|
io.KeyMap[ImGuiKey_X] = 'X';
|
|
io.KeyMap[ImGuiKey_Y] = 'Y';
|
|
io.KeyMap[ImGuiKey_Z] = 'Z';
|
|
|
|
io.RenderDrawListsFn = ImGui_ImplDX12_RenderDrawLists; // Alternatively you can set this to NULL and call ImGui::GetDrawData() after ImGui::Render() to get the same ImDrawData pointer.
|
|
io.ImeWindowHandle = g_hWnd;
|
|
|
|
return true;
|
|
}
|
|
|
|
void ImGui_ImplDX12_Shutdown()
|
|
{
|
|
ImGui_ImplDX12_InvalidateDeviceObjects();
|
|
ImGui::Shutdown();
|
|
delete[] g_pFrameResources;
|
|
g_pd3dDevice = NULL;
|
|
g_hWnd = (HWND)0;
|
|
g_pd3dCommandList = NULL;
|
|
g_hFontSrvCpuDescHandle.ptr = 0;
|
|
g_hFontSrvGpuDescHandle.ptr = 0;
|
|
g_pFrameResources = NULL;
|
|
g_numFramesInFlight = 0;
|
|
g_frameIndex = UINT_MAX;
|
|
}
|
|
|
|
void ImGui_ImplDX12_NewFrame()
|
|
{
|
|
if (!g_pPipelineState)
|
|
ImGui_ImplDX12_CreateDeviceObjects();
|
|
|
|
ImGuiIO& io = ImGui::GetIO();
|
|
|
|
// Setup display size (every frame to accommodate for window resizing)
|
|
RECT rect;
|
|
GetClientRect(g_hWnd, &rect);
|
|
io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
|
|
|
|
// Setup time step
|
|
INT64 current_time;
|
|
QueryPerformanceCounter((LARGE_INTEGER *)¤t_time);
|
|
io.DeltaTime = (float)(current_time - g_Time) / g_TicksPerSecond;
|
|
g_Time = current_time;
|
|
|
|
// Read keyboard modifiers inputs
|
|
io.KeyCtrl = (GetKeyState(VK_CONTROL) & 0x8000) != 0;
|
|
io.KeyShift = (GetKeyState(VK_SHIFT) & 0x8000) != 0;
|
|
io.KeyAlt = (GetKeyState(VK_MENU) & 0x8000) != 0;
|
|
// io.KeysDown : filled by WM_KEYDOWN/WM_KEYUP events
|
|
// io.MousePos : filled by WM_MOUSEMOVE events
|
|
// io.MouseDown : filled by WM_*BUTTON* events
|
|
// io.MouseWheel : filled by WM_MOUSEWHEEL events
|
|
|
|
// Hide OS mouse cursor if ImGui is drawing it
|
|
SetCursor(io.MouseDrawCursor ? NULL : LoadCursor(NULL, IDC_ARROW));
|
|
|
|
// Start the frame
|
|
ImGui::NewFrame();
|
|
}
|