mirror of
https://github.com/ocornut/imgui.git
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226 lines
8.3 KiB
C++
226 lines
8.3 KiB
C++
// ImGui - standalone example application for DirectX 11
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#include <imgui.h>
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#include "imgui_impl_dx11.h"
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#include <d3d11.h>
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#include <d3dcompiler.h>
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#define DIRECTINPUT_VERSION 0x0800
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#include <dinput.h>
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// Data
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static ID3D11Device* g_pd3dDevice = NULL;
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static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
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static IDXGISwapChain* g_pSwapChain = NULL;
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static ID3D11RenderTargetView* g_mainRenderTargetView = NULL;
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void CreateRenderTarget()
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{
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DXGI_SWAP_CHAIN_DESC sd;
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g_pSwapChain->GetDesc(&sd);
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// Create the render target
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ID3D11Texture2D* pBackBuffer;
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D3D11_RENDER_TARGET_VIEW_DESC render_target_view_desc;
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ZeroMemory(&render_target_view_desc, sizeof(render_target_view_desc));
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render_target_view_desc.Format = sd.BufferDesc.Format;
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render_target_view_desc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
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g_pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
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g_pd3dDevice->CreateRenderTargetView(pBackBuffer, &render_target_view_desc, &g_mainRenderTargetView);
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g_pd3dDeviceContext->OMSetRenderTargets(1, &g_mainRenderTargetView, NULL);
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pBackBuffer->Release();
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}
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void CleanupRenderTarget()
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{
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if (g_mainRenderTargetView) { g_mainRenderTargetView->Release(); g_mainRenderTargetView = NULL; }
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}
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HRESULT CreateDeviceD3D(HWND hWnd)
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{
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// Setup swap chain
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DXGI_SWAP_CHAIN_DESC sd;
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{
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ZeroMemory(&sd, sizeof(sd));
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sd.BufferCount = 2;
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sd.BufferDesc.Width = 0;
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sd.BufferDesc.Height = 0;
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sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
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sd.BufferDesc.RefreshRate.Numerator = 60;
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sd.BufferDesc.RefreshRate.Denominator = 1;
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sd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;
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sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
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sd.OutputWindow = hWnd;
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sd.SampleDesc.Count = 1;
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sd.SampleDesc.Quality = 0;
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sd.Windowed = TRUE;
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sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
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}
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UINT createDeviceFlags = 0;
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#ifdef _DEBUG
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createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
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#endif
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D3D_FEATURE_LEVEL featureLevel;
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const D3D_FEATURE_LEVEL featureLevelArray[1] = { D3D_FEATURE_LEVEL_11_0, };
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if (D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, createDeviceFlags, featureLevelArray, 1, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceContext) != S_OK)
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return E_FAIL;
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// Setup rasterizer
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{
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D3D11_RASTERIZER_DESC RSDesc;
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memset(&RSDesc, 0, sizeof(D3D11_RASTERIZER_DESC));
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RSDesc.FillMode = D3D11_FILL_SOLID;
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RSDesc.CullMode = D3D11_CULL_NONE;
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RSDesc.FrontCounterClockwise = FALSE;
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RSDesc.DepthBias = 0;
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RSDesc.SlopeScaledDepthBias = 0.0f;
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RSDesc.DepthBiasClamp = 0;
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RSDesc.DepthClipEnable = TRUE;
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RSDesc.ScissorEnable = TRUE;
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RSDesc.AntialiasedLineEnable = FALSE;
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RSDesc.MultisampleEnable = (sd.SampleDesc.Count > 1) ? TRUE : FALSE;
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ID3D11RasterizerState* pRState = NULL;
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g_pd3dDevice->CreateRasterizerState(&RSDesc, &pRState);
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g_pd3dDeviceContext->RSSetState(pRState);
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pRState->Release();
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}
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CreateRenderTarget();
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return S_OK;
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}
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void CleanupDeviceD3D()
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{
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CleanupRenderTarget();
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if (g_pSwapChain) { g_pSwapChain->Release(); g_pSwapChain = NULL; }
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if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }
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if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
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}
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extern LRESULT ImGui_ImplDX11_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
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LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
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{
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if (ImGui_ImplDX11_WndProcHandler(hWnd, msg, wParam, lParam))
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return true;
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switch (msg)
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{
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case WM_SIZE:
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if (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED)
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{
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ImGui_ImplDX11_InvalidateDeviceObjects();
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CleanupRenderTarget();
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g_pSwapChain->ResizeBuffers(0, (UINT)LOWORD(lParam), (UINT)HIWORD(lParam), DXGI_FORMAT_UNKNOWN, 0);
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CreateRenderTarget();
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ImGui_ImplDX11_CreateDeviceObjects();
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}
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return 0;
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case WM_SYSCOMMAND:
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if ((wParam & 0xfff0) == SC_KEYMENU) // Disable ALT application menu
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return 0;
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break;
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case WM_DESTROY:
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PostQuitMessage(0);
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return 0;
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}
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return DefWindowProc(hWnd, msg, wParam, lParam);
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}
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int main(int, char**)
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{
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// Create application window
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WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, LoadCursor(NULL, IDC_ARROW), NULL, NULL, L"ImGui Example", NULL };
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RegisterClassEx(&wc);
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HWND hwnd = CreateWindow(L"ImGui Example", L"ImGui DirectX11 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
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// Initialize Direct3D
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if (CreateDeviceD3D(hwnd) < 0)
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{
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CleanupDeviceD3D();
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UnregisterClass(L"ImGui Example", wc.hInstance);
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return 1;
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}
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// Show the window
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ShowWindow(hwnd, SW_SHOWDEFAULT);
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UpdateWindow(hwnd);
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// Setup ImGui binding
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ImGui_ImplDX11_Init(hwnd, g_pd3dDevice, g_pd3dDeviceContext);
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// Load Fonts
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// (see extra_fonts/README.txt for more details)
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//ImGuiIO& io = ImGui::GetIO();
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//io.Fonts->AddFontDefault();
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//io.Fonts->AddFontFromFileTTF("../../extra_fonts/Cousine-Regular.ttf", 15.0f);
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//io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f);
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//io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyClean.ttf", 13.0f);
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//io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyTiny.ttf", 10.0f);
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//io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
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// Merge glyphs from multiple fonts into one (e.g. combine default font with another with Chinese glyphs, or add icons)
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//ImWchar icons_ranges[] = { 0xf000, 0xf3ff, 0 };
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//ImFontConfig icons_config; icons_config.MergeMode = true; icons_config.PixelSnapH = true;
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//io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 18.0f);
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//io.Fonts->AddFontFromFileTTF("../../extra_fonts/fontawesome-webfont.ttf", 18.0f, &icons_config, icons_ranges);
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bool show_test_window = true;
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bool show_another_window = false;
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ImVec4 clear_col = ImColor(114, 144, 154);
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// Main loop
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MSG msg;
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ZeroMemory(&msg, sizeof(msg));
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while (msg.message != WM_QUIT)
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{
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if (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
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{
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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continue;
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}
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ImGui_ImplDX11_NewFrame();
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// 1. Show a simple window
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// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
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{
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static float f = 0.0f;
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ImGui::Text("Hello, world!");
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ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
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ImGui::ColorEdit3("clear color", (float*)&clear_col);
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if (ImGui::Button("Test Window")) show_test_window ^= 1;
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if (ImGui::Button("Another Window")) show_another_window ^= 1;
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ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
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}
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// 2. Show another simple window, this time using an explicit Begin/End pair
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if (show_another_window)
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{
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ImGui::SetNextWindowSize(ImVec2(200,100), ImGuiSetCond_FirstUseEver);
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ImGui::Begin("Another Window", &show_another_window);
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ImGui::Text("Hello");
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ImGui::End();
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}
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// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
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if (show_test_window)
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{
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ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver); // Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
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ImGui::ShowTestWindow(&show_test_window);
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}
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// Rendering
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g_pd3dDeviceContext->ClearRenderTargetView(g_mainRenderTargetView, (float*)&clear_col);
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ImGui::Render();
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g_pSwapChain->Present(0, 0);
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}
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ImGui_ImplDX11_Shutdown();
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CleanupDeviceD3D();
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UnregisterClass(L"ImGui Example", wc.hInstance);
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return 0;
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}
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