added imgui to the template

include/io.h

@@ -0,0 +1,13 @@
+#pragma once
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+char* readFile(const char* filePath);
+
+#ifdef __cplusplus
+}
+#endif

source/io.c

@@ -0,0 +1,20 @@
+#include "io.h"
+
+char* readFile(const char* filePath) {
+    FILE* file = fopen(filePath, "rb");
+    if (file == NULL) {
+        fprintf(stderr, "Error: Could not open file %s\n", filePath);
+        return NULL;
+    }
+
+    fseek(file, 0, SEEK_END);
+    long length = ftell(file);
+    fseek(file, 0, SEEK_SET);
+
+    char* buffer = (char*)malloc(length + 1);
+    fread(buffer, 1, length, file);
+    buffer[length] = '\0';
+
+    fclose(file);
+    return buffer;
+}

source/main.cpp

@@ -2,11 +2,19 @@
 #include <GLFW/glfw3.h>
 #include <iostream>
 
+#include "io.h"
+
 // ImGui includes
 #include "imgui/imgui.h"
 #include "imgui/imgui_impl_glfw.h"
 #include "imgui/imgui_impl_opengl3.h"
 
+char* fragmentShaderFile = "./source/shader/fragment.glsl";
+char* vertexShaderFile = "./source/shader/vertex.glsl";
+
+const unsigned int SCR_WIDTH = 1920;
+const unsigned int SCR_HEIGHT = 1080;
+
 // Callback to resize the viewport when the window is resized
 void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
 	(void)window; // Unused parameter
@@ -14,9 +22,7 @@ void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
 }
 
 int main() {
-	// 1. Initialize GLFW
 	glfwInit();
-    // Set OpenGL version to 3.3 Core Profile - For MacOS, you may need to uncomment the next line
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
@@ -26,8 +32,7 @@ int main() {
     glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // Required on Mac
 #endif
 
-	// 2. Create the Window
+	GLFWwindow *window = glfwCreateWindow( SCR_WIDTH, SCR_HEIGHT , "OpenGLTemplate", NULL, NULL);
-	GLFWwindow *window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
 	if (window == NULL) {
 		std::cout << "Failed to create GLFW window" << std::endl;
 		glfwTerminate();
@@ -36,57 +41,68 @@ int main() {
 	glfwMakeContextCurrent(window);
 	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
 
-	// 3. Initialize GLAD (Load function pointers)
 	if (!gladLoadGLLoader(reinterpret_cast<GLADloadproc>(glfwGetProcAddress))) {
 		std::cout << "Failed to initialize GLAD" << std::endl;
 		return -1;
 	}
 
-	// --- ImGui Setup Start ---
+    // Compile shaders
+    char* vertexShaderSource = readFile(vertexShaderFile);
+    char* fragmentShaderSource = readFile(fragmentShaderFile);
+
+    unsigned int vertexShader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
+    glCompileShader(vertexShader);
+
+    unsigned int fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
+    glCompileShader(fragmentShader);
+
+    unsigned int shaderProgram = glCreateProgram();
+    glAttachShader(shaderProgram, vertexShader);
+    glAttachShader(shaderProgram, fragmentShader);
+    glLinkProgram(shaderProgram);
+
+    glDeleteShader(vertexShader);
+    glDeleteShader(fragmentShader);
+
+    delete[] vertexShaderSource;
+    delete[] fragmentShaderSource;
+
+    // --- ImGui Setup Start ---
 	IMGUI_CHECKVERSION();
 	ImGui::CreateContext();
 	ImGuiIO &io = ImGui::GetIO();
 	(void)io;
-
-	// Setup Dear ImGui style
 	ImGui::StyleColorsDark();
-	// ImGui::StyleColorsLight();
-
-	// Setup Platform/Renderer backends
 	ImGui_ImplGlfw_InitForOpenGL(window, true);
 	ImGui_ImplOpenGL3_Init(glsl_version);
 
-	// 4. The Render Loop
 	while (!glfwWindowShouldClose(window)) {
-		// Input
 		if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
 			glfwSetWindowShouldClose(window, true);
 
-        // --- ImGui Frame Start ---
         ImGui_ImplOpenGL3_NewFrame();
         ImGui_ImplGlfw_NewFrame();
         ImGui::NewFrame();
 
-        // Create a simple window
         ImGui::Begin("Settings");
-        ImGui::Text("Hello from Dear ImGui!");
+        ImGui::Text("FPS: %.1f", static_cast<double>(ImGui::GetIO().Framerate));
         ImGui::End();
-        // --- ImGui Frame End ---
+        glUseProgram(shaderProgram);
 
-		// Rendering commands here
 		glClearColor(0.01f, 0.01f, 0.01f, 1.0f); // Set clear color (Dark Gray)
 		glClear(GL_COLOR_BUFFER_BIT);         // Clear the screen
 
+
         ImGui::Render();
         ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
 
-		// Swap buffers and poll IO events
 		glfwSwapBuffers(window);
 		glfwPollEvents();
 	}
 
 	// 5. Clean up
-
     ImGui_ImplOpenGL3_Shutdown();
     ImGui_ImplGlfw_Shutdown();
     ImGui::DestroyContext();

source/shader/fragment.glsl

@@ -0,0 +1,8 @@
+#version 330 core
+out vec4 FragColor;
+
+void main() {
+    FragColor = vec4(1.0, 1.0, 1.0, 1.0);
+}
+
+

source/shader/vertex.glsl

@@ -0,0 +1,9 @@
+#version 330 core
+layout (location = 0) in vec2 aPos;
+
+out vec3 vColor;
+
+void main() {
+    gl_Position = vec4(aPos, 0.0, 1.0);
+}
+