From 2fb85dc9a2f5b886bd3efcdc1f9b7fabdba4f0b1 Mon Sep 17 00:00:00 2001
From: Brett <brettmaster1@gmail.com>
Date: Sat, 16 Dec 2023 01:32:25 -0500
Subject: [PATCH] imgui working

---
 commit.sh              |  4 ++++
 src/blt/gfx/window.cpp | 47 ++++++++++++++++++++++++++++++++++++++++++
 src/main.cpp           |  3 ++-
 3 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100755 commit.sh

diff --git a/commit.sh b/commit.sh
new file mode 100755
index 0000000..0471948
--- /dev/null
+++ b/commit.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+git add *
+git commit
+git push -u origin main
diff --git a/src/blt/gfx/window.cpp b/src/blt/gfx/window.cpp
index 92ae633..ba96006 100644
--- a/src/blt/gfx/window.cpp
+++ b/src/blt/gfx/window.cpp
@@ -8,6 +8,9 @@
 #include <blt/std/logging.h>
 #include <blt/gfx/input.h>
 #include <queue>
+#include <imgui.h>
+#include "backends/imgui_impl_opengl3.h"
+#include "backends/imgui_impl_glfw.h"
 
 void error_callback(int error, const char* description)
 {
@@ -86,6 +89,30 @@ namespace blt::gfx
         });
     }
     
+    void setup_ImGUI()
+    {
+        const char* glsl_version = "#version 100";
+        
+        // Setup Dear ImGui context
+        IMGUI_CHECKVERSION();
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO(); (void)io;
+        io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
+        io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+        
+        // Setup Dear ImGui style
+        ImGui::StyleColorsDark();
+        //ImGui::StyleColorsLight();
+        
+        // Setup Platform/Renderer backends
+        ImGui_ImplGlfw_InitForOpenGL(window_state.window, true);
+        ImGui_ImplOpenGL3_Init(glsl_version);
+
+#ifdef __EMSCRIPTEN__
+        io.IniFilename = nullptr;
+#endif
+    }
+    
     void init(const window_data& data)
     {
         /* -- Setup Error Callback -- */
@@ -107,8 +134,13 @@ namespace blt::gfx
         glfwSwapInterval(data.sync_interval);
         gladLoadGL(glfwGetProcAddress);
         
+        /* -- Setup our local callbacks, ImGUI will then call these -- */
         create_callbacks();
         
+        /* -- Setup ImGUI -- */
+        setup_ImGUI();
+        
+        
         /* -- Call User Provided post-window-init function  -- */
         data.init();
         
@@ -118,10 +150,21 @@ namespace blt::gfx
             /* -- Get the current framebuffer size, update the global width/height state, along with OpenGL viewport -- */
             glfwGetFramebufferSize(window_state.window, &window_state.width, &window_state.height);
             glViewport(0, 0, window_state.width, window_state.height);
+            // TODO: user option for this
+            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+            
+            /* -- Begin the next ImGUI frame -- */
+            ImGui_ImplOpenGL3_NewFrame();
+            ImGui_ImplGlfw_NewFrame();
+            ImGui::NewFrame();
             
             /* -- Call user update function -- */
             data.update(window_state.width, window_state.height);
             
+            /* -- Render the ImGUI frame -- */
+            ImGui::Render();
+            ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+            
             /* -- Update GLFW state -- */
             glfwSwapBuffers(window_state.window);
             glfwPollEvents();
@@ -130,6 +173,10 @@ namespace blt::gfx
     
     void cleanup()
     {
+        ImGui_ImplOpenGL3_Shutdown();
+        ImGui_ImplGlfw_Shutdown();
+        ImGui::DestroyContext();
+        
         glfwDestroyWindow(window_state.window);
         glfwTerminate();
     }
diff --git a/src/main.cpp b/src/main.cpp
index bc7c634..5698959 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6 +1,7 @@
 #include <iostream>
 
 #include <blt/gfx/window.h>
+#include <imgui.h>
 
 void init()
 {
@@ -9,7 +10,7 @@ void init()
 
 void update(std::int32_t width, std::int32_t height)
 {
-
+    ImGui::ShowDemoWindow();
 }
 
 int main()