glfw_dx11_example: add main.cpp

backend_test/example_glfw_dx11/CMakeLists.txt

@@ -1,4 +1,4 @@
-Project(cimgui_glfw)
+Project(cimgui_glfwdx11)
 cmake_minimum_required(VERSION 3.11)
 if(WIN32) # to mingw work as all the others
 	set(CMAKE_SHARED_LIBRARY_PREFIX "")
@@ -92,11 +92,11 @@ target_link_libraries(cimgui ${IMGUI_LIBRARIES} glfw)
 
 # using library
 include_directories(../../generator/output/)
-#add_executable(${PROJECT_NAME} main.c)
-#target_compile_definitions(${PROJECT_NAME} PUBLIC -DCIMGUI_USE_DX11 -DCIMGUI_USE_GLFW)
+add_executable(${PROJECT_NAME} main.cpp)
+target_compile_definitions(${PROJECT_NAME} PUBLIC -DCIMGUI_USE_DX11 -DCIMGUI_USE_GLFW)
 if (MINGW)
 	#target_link_options(${PROJECT_NAME} PRIVATE "-mconsole")
 endif()
-#target_link_libraries(${PROJECT_NAME} ${IMGUI_SDL_LIBRARY} cimgui)
+target_link_libraries(${PROJECT_NAME} d3d11 d3dcompiler.lib cimgui)
 
 

backend_test/example_glfw_dx11/main.cpp

@@ -0,0 +1,240 @@
+#define CIMGUI_DEFINE_ENUMS_AND_STRUCTS
+#include "cimgui.h"
+#include "cimgui_impl.h"
+#include <d3d11.h>
+#include <GLFW/glfw3.h>
+#define GLFW_EXPOSE_NATIVE_WIN32
+#include <GLFW/glfw3native.h>
+#include <stdio.h>
+#ifdef _MSC_VER
+#include <windows.h>
+#endif
+
+
+
+#ifdef IMGUI_HAS_IMSTR
+#define igBegin igBegin_Str
+#define igSliderFloat igSliderFloat_Str
+#define igCheckbox igCheckbox_Str
+#define igColorEdit3 igColorEdit3_Str
+#define igButton igButton_Str
+#endif
+
+GLFWwindow *window;
+
+// Data
+static ID3D11Device*            g_pd3dDevice = NULL;
+static ID3D11DeviceContext*     g_pd3dDeviceContext = NULL;
+static IDXGISwapChain*          g_pSwapChain = NULL;
+static ID3D11RenderTargetView*  g_mainRenderTargetView = NULL;
+
+// Forward declarations of helper functions
+bool CreateDeviceD3D(HWND hWnd);
+void CleanupDeviceD3D();
+void CreateRenderTarget();
+void CleanupRenderTarget();
+
+void window_size_callback(GLFWwindow* window, int width, int height)
+{
+	CleanupRenderTarget();
+    g_pSwapChain->ResizeBuffers(0, width, height, DXGI_FORMAT_UNKNOWN, 0);
+    CreateRenderTarget();
+}
+
+int main(int argc, char *argv[])
+{
+
+  if (!glfwInit())
+    return -1;
+
+  // Decide GL+GLSL versions
+  glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
+
+
+
+  // just an extra window hint for resize
+  glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
+
+  window = glfwCreateWindow(1024, 768, "Hello World!", NULL, NULL);
+  if (!window) 
+  {
+    printf("Failed to create window! Terminating!\n");
+    glfwTerminate();
+    return -1;
+  }
+
+  //
+  HWND hwnd = glfwGetWin32Window(window);
+  if (hwnd == NULL)
+  {
+	  printf("Failed to get win32 window! Terminating!\n");
+	  glfwTerminate();
+		return -1;
+  }
+	 // Initialize Direct3D
+    if (!CreateDeviceD3D(hwnd))
+    {
+        CleanupDeviceD3D();
+        return 1;
+    }
+
+	glfwSetWindowSizeCallback(window, window_size_callback);
+
+  // setup imgui
+  igCreateContext(NULL);
+
+  // set docking
+  ImGuiIO *ioptr = igGetIO();
+  ioptr->ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;   // Enable Keyboard Controls
+  //ioptr->ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;  // Enable Gamepad Controls
+#ifdef IMGUI_HAS_DOCK
+  ioptr->ConfigFlags |= ImGuiConfigFlags_DockingEnable;       // Enable Docking
+  ioptr->ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;     // Enable Multi-Viewport / Platform Windows
+#endif
+
+  ImGui_ImplGlfw_InitForOther(window, true);
+  ImGui_ImplDX11_Init(g_pd3dDevice, g_pd3dDeviceContext);
+
+  igStyleColorsDark(NULL);
+  // ImFontAtlas_AddFontDefault(io.Fonts, NULL);
+
+  bool showDemoWindow = true;
+  bool showAnotherWindow = false;
+  ImVec4 clearColor;
+  clearColor.x = 0.45f;
+  clearColor.y = 0.55f;
+  clearColor.z = 0.60f;
+  clearColor.w = 1.00f;
+
+  // main event loop
+  bool quit = false;
+  while (!glfwWindowShouldClose(window))
+  {
+
+    glfwPollEvents();
+
+    // start imgui frame
+    ImGui_ImplDX11_NewFrame();
+    ImGui_ImplGlfw_NewFrame();
+    igNewFrame();
+
+    if (showDemoWindow)
+      igShowDemoWindow(&showDemoWindow);
+
+    // show a simple window that we created ourselves.
+    {
+      static float f = 0.0f;
+      static int counter = 0;
+
+      igBegin("Hello, world!", NULL, 0);
+      igText("This is some useful text");
+      igCheckbox("Demo window", &showDemoWindow);
+      igCheckbox("Another window", &showAnotherWindow);
+
+      igSliderFloat("Float", &f, 0.0f, 1.0f, "%.3f", 0);
+      igColorEdit3("clear color", (float *)&clearColor, 0);
+
+      ImVec2 buttonSize;
+      buttonSize.x = 0;
+      buttonSize.y = 0;
+      if (igButton("Button", buttonSize))
+        counter++;
+      igSameLine(0.0f, -1.0f);
+      igText("counter = %d", counter);
+
+      igText("Application average %.3f ms/frame (%.1f FPS)",
+             1000.0f / igGetIO()->Framerate, igGetIO()->Framerate);
+      igEnd();
+    }
+
+    if (showAnotherWindow) 
+    {
+      igBegin("imgui Another Window", &showAnotherWindow, 0);
+      igText("Hello from imgui");
+      ImVec2 buttonSize;
+      buttonSize.x = 0;
+      buttonSize.y = 0;
+      if (igButton("Close me", buttonSize)) {
+        showAnotherWindow = false;
+      }
+      igEnd();
+    }
+
+    // render
+    igRender();
+	ImGui_ImplDX11_RenderDrawData(igGetDrawData());
+#ifdef IMGUI_HAS_DOCK
+    if (ioptr->ConfigFlags & ImGuiConfigFlags_ViewportsEnable) 
+    {
+      igUpdatePlatformWindows();
+      igRenderPlatformWindowsDefault(NULL, NULL);
+    }
+#endif
+    g_pSwapChain->Present(1, 0); // Present with vsync
+    //g_pSwapChain->Present(0, 0); // Present without vsync
+  }
+
+  // clean up
+  ImGui_ImplDX11_Shutdown();
+  ImGui_ImplGlfw_Shutdown();
+  igDestroyContext(NULL);
+
+CleanupDeviceD3D();
+  glfwDestroyWindow(window);
+  glfwTerminate();
+
+  return 0;
+}
+
+// Helper functions to use DirectX11
+bool CreateDeviceD3D(HWND hWnd)
+{
+    // Setup swap chain
+    DXGI_SWAP_CHAIN_DESC sd;
+    ZeroMemory(&sd, sizeof(sd));
+    sd.BufferCount = 2;
+    sd.BufferDesc.Width = 0;
+    sd.BufferDesc.Height = 0;
+    sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+    sd.BufferDesc.RefreshRate.Numerator = 60;
+    sd.BufferDesc.RefreshRate.Denominator = 1;
+    sd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;
+    sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    sd.OutputWindow = hWnd;
+    sd.SampleDesc.Count = 1;
+    sd.SampleDesc.Quality = 0;
+    sd.Windowed = TRUE;
+    sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+
+    UINT createDeviceFlags = 0;
+    //createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
+    D3D_FEATURE_LEVEL featureLevel;
+    const D3D_FEATURE_LEVEL featureLevelArray[2] = { D3D_FEATURE_LEVEL_11_0, D3D_FEATURE_LEVEL_10_0, };
+    if (D3D11CreateDeviceAndSwapChain(nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, createDeviceFlags, featureLevelArray, 2, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceContext) != S_OK)
+        return false;
+
+    CreateRenderTarget();
+    return true;
+}
+
+void CleanupDeviceD3D()
+{
+    CleanupRenderTarget();
+    if (g_pSwapChain) { g_pSwapChain->Release(); g_pSwapChain = nullptr; }
+    if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = nullptr; }
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = nullptr; }
+}
+
+void CreateRenderTarget()
+{
+    ID3D11Texture2D* pBackBuffer;
+    g_pSwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
+    g_pd3dDevice->CreateRenderTargetView(pBackBuffer, nullptr, &g_mainRenderTargetView);
+    pBackBuffer->Release();
+}
+
+void CleanupRenderTarget()
+{
+    if (g_mainRenderTargetView) { g_mainRenderTargetView->Release(); g_mainRenderTargetView = nullptr; }
+}
+