Support for remote control

DebugGUI/src/DebugGUI.cxx

@@ -24,24 +24,50 @@ namespace framework
 // @return an object of kind GLFWwindow* as void* to avoid having a direct dependency
 void* initGUI(const char* name, void(*error_callback)(int, char const*description))
 {
-  // Setup window
-  if (error_callback == nullptr) {
-    glfwSetErrorCallback(default_error_callback);
+  GLFWwindow* window = nullptr;
+  if (name) {
+    // Setup window
+    if (error_callback == nullptr) {
+      glfwSetErrorCallback(default_error_callback);
+    }
+    if (!glfwInit())
+      return nullptr;
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+  #if __APPLE__
+    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+  #endif
+    window = glfwCreateWindow(1280, 720, name, nullptr, nullptr);
+    glfwMakeContextCurrent(window);
+    gl3wInit();
+
+    // Setup ImGui binding
+    ImGui_ImplGlfwGL3_Init(window, true);
+  } else {
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO();
+    ImGui::StyleColorsDark();
+    io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB;
+    io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
+    io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
+    io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
+    io.KeyMap[ImGuiKey_DownArrow] = GLFW_KEY_DOWN;
+    io.KeyMap[ImGuiKey_PageUp] = GLFW_KEY_PAGE_UP;
+    io.KeyMap[ImGuiKey_PageDown] = GLFW_KEY_PAGE_DOWN;
+    io.KeyMap[ImGuiKey_Home] = GLFW_KEY_HOME;
+    io.KeyMap[ImGuiKey_End] = GLFW_KEY_END;
+    io.KeyMap[ImGuiKey_Delete] = GLFW_KEY_DELETE;
+    io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
+    io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
+    io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
+    io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
+    io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;
+    io.KeyMap[ImGuiKey_V] = GLFW_KEY_V;
+    io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
+    io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
+    io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
   }
-  if (!glfwInit())
-    return nullptr;
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-#if __APPLE__
-  glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
-#endif
-  GLFWwindow* window = glfwCreateWindow(1280, 720, name, nullptr, nullptr);
-  glfwMakeContextCurrent(window);
-  gl3wInit();
-
-  // Setup ImGui binding
-  ImGui_ImplGlfwGL3_Init(window, true);
 
   // Load Fonts
   // (there is a default font, this is only if you want to change it. see extra_fonts/README.txt for more details)
@@ -50,7 +76,13 @@ void* initGUI(const char* name, void(*error_callback)(int, char const*descriptio
   static const ImWchar icons_ranges[] = { ICON_MIN_FA, ICON_MAX_FA, 0 };
   ImFontConfig icons_config; icons_config.MergeMode = true; icons_config.PixelSnapH = true; icons_config.FontDataOwnedByAtlas = false;
   io.Fonts->AddFontFromMemoryTTF((void*)s_iconsFontAwesomeTtf, sizeof(s_iconsFontAwesomeTtf), 12.0f, &icons_config, icons_ranges);
-
+
+  // this initializes the texture
+  if (io.Fonts->ConfigData.empty())
+    io.Fonts->AddFontDefault();
+  io.Fonts->Build();
+  io.DisplaySize = ImVec2(1280, 720);
+
   ImPlot::CreateContext();
   return window;
 }
@@ -186,23 +218,31 @@ void getFrameRaw(void *data, void **raw_data, int *size)
   *raw_data = local_data_base;
 }
 
-bool pollGUIPreRender(void* context)
+bool pollGUIPreRender(void* context, float delta)
 {
-  GLFWwindow* window = reinterpret_cast<GLFWwindow*>(context);
+  if (context) {
+    GLFWwindow* window = reinterpret_cast<GLFWwindow*>(context);
 
-  if (glfwWindowShouldClose(window)) {
-    return false;
+    if (glfwWindowShouldClose(window)) {
+      return false;
+    }
+    glfwPollEvents();
+    ImGui_ImplGlfwGL3_NewFrame();
+
+    // Clearing the viewport
+    int display_w, display_h;
+    glfwGetFramebufferSize(window, &display_w, &display_h);
+    glViewport(0, 0, display_w, display_h);
+    ImVec4 clear_color = ImColor(114, 144, 154);
+    glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
+    glClear(GL_COLOR_BUFFER_BIT);
+  } else {
+    // Just initialize new frame
+    ImGuiIO& io = ImGui::GetIO();
+    io.DeltaTime = delta;
+    ImGui::NewFrame();
   }
-  glfwPollEvents();
-  ImGui_ImplGlfwGL3_NewFrame();
 
-  // Rendering
-  int display_w, display_h;
-  glfwGetFramebufferSize(window, &display_w, &display_h);
-  glViewport(0, 0, display_w, display_h);
-  ImVec4 clear_color = ImColor(114, 144, 154);
-  glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
-  glClear(GL_COLOR_BUFFER_BIT);
 
   return true;
 }
@@ -221,16 +261,18 @@ void *pollGUIRender(std::function<void(void)> guiCallback)
 
 void pollGUIPostRender(void* context, void *draw_data)
 {
-  GLFWwindow* window = reinterpret_cast<GLFWwindow*>(context);
+  if (context) {
+    GLFWwindow* window = reinterpret_cast<GLFWwindow*>(context);
 
-  ImGui_ImplGlfwGL3_RenderDrawLists((ImDrawData*)draw_data);
-  glfwSwapBuffers(window);
+    ImGui_ImplGlfwGL3_RenderDrawLists((ImDrawData*)draw_data);
+    glfwSwapBuffers(window);
+  }
 }
-
+  
 /// @return true if we do not need to exit, false if we do.
 bool pollGUI(void* context, std::function<void(void)> guiCallback)
 {
-  if (!pollGUIPreRender(context)) {
+  if (!pollGUIPreRender(context, 1.0f/60.0f)) {
     return false;
   }
   void *draw_data = pollGUIRender(guiCallback);

DebugGUI/src/DebugGUI.h

@@ -22,7 +22,7 @@ void* initGUI(const char* name, decltype(default_error_callback) = nullptr);
 bool pollGUI(void* context, std::function<void(void)> guiCallback);
 void getFrameJSON(void *data, std::ostream& json_data);
 void getFrameRaw(void *data, void **raw_data, int *size);
-bool pollGUIPreRender(void* context);
+bool pollGUIPreRender(void* context, float delta);
 void* pollGUIRender(std::function<void(void)> guiCallback);
 void pollGUIPostRender(void* context, void* draw_data);
 void disposeGUI();

DebugGUI/src/imgui_impl_glfw_gl3.cpp

@@ -381,19 +381,15 @@ void ImGui_ImplGlfwGL3_NewFrame()
         double mouse_x, mouse_y;
         glfwGetCursorPos(g_Window, &mouse_x, &mouse_y);
         io.MousePos = ImVec2((float)mouse_x, (float)mouse_y);   // Mouse position in screen coordinates (set to -1,-1 if no mouse / on another screen, etc.)
-    }
-    else
-    {
-        io.MousePos = ImVec2(-1,-1);
+        for (int i = 0; i < 3; i++)
+        {
+            io.MouseDown[i] = g_MousePressed[i] || glfwGetMouseButton(g_Window, i) != 0;    // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
+            g_MousePressed[i] = false;
+        }
+        io.MouseWheel = g_MouseWheel;
     }
 
-    for (int i = 0; i < 3; i++)
-    {
-        io.MouseDown[i] = g_MousePressed[i] || glfwGetMouseButton(g_Window, i) != 0;    // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
-        g_MousePressed[i] = false;
-    }
 
-    io.MouseWheel = g_MouseWheel;
     g_MouseWheel = 0.0f;
 
     // Hide OS mouse cursor if ImGui is drawing it