Sketchy Multi Viewports

ExampleApps.nix

@@ -61,7 +61,7 @@
             -DRENDERER=1 \
             -DWINDOW=1 \
             -I include -I $imgui -I . \
-            -lGL -lEGL -lglfw -lGLEW \
+            -lEGL -lGL -lglfw -lGLEW \
             -Wall \
             -o $name -DIMGUI_IMPL_GLFW_DISABLE_X11 
         ''; 
@@ -103,7 +103,7 @@
             -DRENDERER=1 \
             -DWINDOW=1 \
             -I include -I $imgui -I . \
-            -lEGL -lglfw -lGLEW \
+            -lGL -lglfw -lGLEW \
             -Wall \
             -o $name -DIMGUI_IMPL_GLFW_DISABLE_X11 
         ''; 

flake.lock

@@ -49,11 +49,28 @@
         "type": "github"
       }
     },
+    "nixpkgs-old": {
+      "locked": {
+        "lastModified": 1720535198,
+        "narHash": "sha256-zwVvxrdIzralnSbcpghA92tWu2DV2lwv89xZc8MTrbg=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "205fd4226592cc83fd4c0885a3e4c9c400efabb5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-23.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "clay": "clay",
         "imgui": "imgui",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-old": "nixpkgs-old"
       }
     }
   },

flake.nix

@@ -3,6 +3,7 @@
 
     inputs = {
         nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
+        nixpkgs-old.url = "github:nixos/nixpkgs/nixos-23.11"; # Until Dear ImGUI has multi viewports on wayland
         imgui = {
             url = "github:ocornut/imgui?ref=docking";
             flake = false;
@@ -15,15 +16,17 @@
 
     outputs = { self, nixpkgs, imgui, clay, ... }@inputs: let
             system = "x86_64-linux";
-            pkgs = import nixpkgs { inherit system; };
+            pkgs-old = import inputs.nixpkgs-old { inherit system; };
+            viewport-overlay = final: prev: { glfw = pkgs-old.glfw; };
+            pkgs = import nixpkgs { inherit system; overlays = [ viewport-overlay ]; };
     in {
 
         Archimedes = {
-            examples = import ./ExampleApps.nix { inherit inputs; inherit pkgs; };
+            examples = import ./ExampleApps.nix { inherit inputs pkgs; };
         };
 
         Modules = {
-            examples = import ./ExampleModules.nix { inherit inputs; inherit pkgs; };
+            examples = import ./ExampleModules.nix { inherit inputs pkgs; };
 
             ServerModule = pkgs.stdenvNoCC.mkDerivation {
 
@@ -114,7 +117,7 @@
                     -DRENDERER=1 \
                     -DWINDOW=1 \
                     -DWINDOWMODULE_DYNAMIC \
-                    -lEGL -lglfw -lGLEW \
+                    -lGL -lglfw -lGLEW \
                     -Wall \
                     -o $name -DIMGUI_IMPL_GLFW_DISABLE_X11
                 ''; 
@@ -157,7 +160,7 @@
                     -DCUSTOMFONT=${pkgs.fira-code}/share/fonts/truetype/FiraCode-VF.ttf \
                     -fpic -shared \
                     -I include -I $imgui -I . \
-                    -lEGL -lglfw -lGLEW \
+                    -lGL -lglfw -lGLEW \
                     -Wall \
                     -o $name -DIMGUI_IMPL_GLFW_DISABLE_X11
                 ''; 
@@ -243,7 +246,7 @@
                     -DMAINGUI_DYNAMIC \
                     -fpic -shared \
                     -I include -I $imgui -I . \
-                    -lEGL -lglfw -lGLEW \
+                    -lGL -lglfw -lGLEW \
                     -Wall \
                     -o $name -DIMGUI_IMPL_GLFW_DISABLE_X11 
                 ''; 

modules/Archimedes-Modules/Calculator/Calculator.cpp

@@ -151,6 +151,8 @@ double Calculator::evaluate(std::string equation, std::unordered_map<char, std::
         default:
             break;
     }
+
+    return 0;
 }
 
 std::string Calculator::calculate(std::string equation) {

modules/Archimedes-Modules/Calculator/Calculator.h

@@ -17,7 +17,7 @@ class Calculator : public Archimedes::Module {
 
         bool parenthesis = true;
         
-        bool graphing = false;
+        //bool graphing = false;
 
         void basicCalculator();
 

modules/ImguiModule/ImguiModule.cpp

@@ -52,7 +52,7 @@ void ImguiModule::onLoad() {
 
     io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
     io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
-
+    
 #ifdef CUSTOMFONT
     io.Fonts->AddFontFromFileTTF(STRINGIZE_VALUE_OF(CUSTOMFONT), 13.0f);
 #endif
@@ -60,6 +60,18 @@ void ImguiModule::onLoad() {
     ImGui::StyleColorsDark();
     //ImGui::StyleColorsLight();
 
+    // Setup scaling
+    ImGuiStyle& style = ImGui::GetStyle();
+    io.ConfigDpiScaleFonts = true;          // [Experimental] Automatically overwrite style.FontScaleDpi in Begin() when Monitor DPI changes. This will scale fonts but _NOT_ scale sizes/padding for now.
+    io.ConfigDpiScaleViewports = true;      // [Experimental] Scale Dear ImGui and Platform Windows when Monitor DPI changes.
+
+    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        style.WindowRounding = 0.0f;
+        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
+    }
+
     // Setup Platform/Renderer backends
     if(!windowInit())
         std::cout << "windowInit failed\n";
@@ -73,9 +85,12 @@ void ImguiModule::onLoad() {
 
         rendererRenderDrawData();
 
-        rendererNewFrame();
+        if(ImGui::GetIO().ConfigFlags & ImGuiConfigFlags_ViewportsEnable) {
-        windowNewFrame();
+            ImGui::UpdatePlatformWindows();
-        ImGui::NewFrame();
+            ImGui::RenderPlatformWindowsDefault();
+
+            window->getWindowImpl().restoreContext();
+        }
     });
 
     rcmd_it = --wm->getRenderer()->getCmdList().end()++;
@@ -92,9 +107,14 @@ void ImguiModule::onLoad() {
     rendererNewFrame();
     windowNewFrame();
     ImGui::NewFrame();
-
 }
 
+void ImguiModule::run() {
+    rendererNewFrame();
+    windowNewFrame();
+    ImGui::NewFrame();
+};
+
 bool ImguiModule::onEvent(const Archimedes::Event &e) {
 
     return false;

modules/ImguiModule/ImguiModule.h

@@ -38,6 +38,8 @@ class ImguiModule : public Archimedes::Module {
         ~ImguiModule();
 
         void onLoad() override;
+        
+        void run() override;
 
         bool onEvent(const Archimedes::Event&) override;
 

modules/MainGUI/MainGUI.cpp

@@ -56,6 +56,8 @@ void MainGUI::run() {
 
         ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
         ImGui::End();
+
+        ImGui::ShowDemoWindow();
     } else {
         app->end();
     }