imgui

src/game/rendering/Rendering.cpp

@@ -5,6 +5,8 @@
 #include "../Mesh.h"
 #include "Rendering.h"
 
+#include "SDL3/SDL_events.h"
+#include "backends/imgui_impl_sdl3.h"
 #include "bgfx/defines.h"
 #include "bx/filepath.h"
 #include "bx/math.h"
@@ -228,6 +230,21 @@ namespace Game
         Materials[0] = Material::LoadFromShader("vert", "frag", Textures[0].Handle, Textures[0].SamplerHandle);
         imguiCreate();
 
+        if (!ImGui_ImplSDL3_InitForOther(shared.Window.SDLWindow))
+        {
+            Log("Failed to set up imgui implementation!");
+            return;
+        }
+
+        // ImGui::GetIO().BackendFlags |= ImGuiBackendFlags_RendererHasViewports;
+        ImGui::GetIO().ConfigFlags |= ImGuiConfigFlags_DockingEnable;
+        // ImGui::GetIO().ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;
+        // auto& platIO = ImGui::GetPlatformIO();
+        // platIO.Renderer_CreateWindow = TODO;
+        // platIO.Platform_DestroyWindow = TODO;
+        // platIO.Platform_SetWindowSize = TODO;
+        // platIO.Platform_RenderWindow = TODO;
+
         if (!GetInstance().IsInitialized)
         {
             GetInstance().Time.StartTime = bx::getHPCounter();
@@ -236,10 +253,19 @@ namespace Game
 
     void GameRendering::Update()
     {
-        imguiBeginFrame(0, 0, 0, 0, 100, 100);
-        ImGui::ShowDemoWindow();
         SharedData& shared = GetShared();
 
+        for (uint16_t i = 0; i < shared.Window.SDLEventCount; ++i)
+        {
+            ImGui_ImplSDL3_ProcessEvent(&shared.Window.SDLEvents[i]);
+        }
+        shared.Window.SDLEventCount = 0;
+
+        ImGui_ImplSDL3_NewFrame();
+        imguiBeginFrame(0, 0, 0, 0, shared.Window.WindowWidth, shared.Window.WindowHeight);
+        ImGui::DockSpaceOverViewport();
+        ImGui::ShowDemoWindow();
+
         // Reload shaders if necessary
         FileChangeNotification* shaderChange = nullptr;
         if (shared.Dev.ChangedShaderCount > 0)
@@ -305,6 +331,12 @@ namespace Game
         }
         imguiEndFrame();
 
+        if (ImGui::GetIO().ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+        {
+            ImGui::UpdatePlatformWindows();
+            ImGui::RenderPlatformWindowsDefault();
+        }
+
         START_PERF();
         bgfx::frame();
         END_PERF(shared.Window.PerfCounters, PerfCounterType::Submit, shared.Window.FrameCounter);
@@ -312,6 +344,7 @@ namespace Game
 
     void GameRendering::Shutdown()
     {
+        ImGui_ImplSDL3_Shutdown();
         imguiDestroy();
         bgfx::shutdown();
     }