Initialize an OpenGL application: display a single color

.gitignore

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+# CMake build directories
+build/
+cmake-build-*/
+out/
+
+# CMake generated files
+CMakeFiles/
+CMakeCache.txt
+cmake_install.cmake
+Makefile
+*.vcxproj*
+*.sln
+
+# IDE specific files
+.idea/
+.vscode/
+*.user
+
+# Other temporary files
+*.log
+*.tmp
+*.swp

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.12)
+project(OpenGLTest CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+
+find_package(OpenGL REQUIRED)
+find_package(GLEW REQUIRED)
+find_package(glfw3 REQUIRED)
+
+add_executable(opengl_test src/main.cpp)
+
+target_link_libraries(opengl_test
+    OpenGL::GL
+    GLEW::GLEW
+    glfw
+)

src/main.cpp

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+#include <stdio.h>
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+
+// Window dimensions
+const GLint WIDTH = 800, HEIGHT = 600;
+
+
+int main() {
+    // Initialize GLFW
+    glfwInitHint(GLFW_PLATFORM, GLFW_PLATFORM_WAYLAND);
+
+    if (!glfwInit()) {
+        printf("GLFW initialization failed!");
+        glfwTerminate();
+        return 1;
+    }
+
+
+    // Setup GLFW window properties
+    // OpenGL version
+    // @Reminder Look into making it work on Wayland
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
+    // Core profile means it will not be backwards compatible
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+
+    GLFWwindow *window = glfwCreateWindow(WIDTH, HEIGHT, "Test Window", NULL, NULL);
+
+    if (!window) {
+        const char *desc;
+        int code = glfwGetError(&desc);
+        printf("GLFW window creation failed!");
+        printf("GLFW error code: %d, description: %s\n", code, desc ? desc : "No description given");
+        glfwTerminate();
+        return 1;
+    }
+
+    // Get Buffer size information
+    int buffer_width, buffer_height;
+    glfwGetFramebufferSize(window, &buffer_width, &buffer_height);
+
+    // Set context for GLEW to use
+    glfwMakeContextCurrent(window);
+
+
+    glGetError();
+
+    // Allow modern extension features
+    glewExperimental = GL_TRUE;
+
+    GLenum err = glewInit();
+    if (err != GLEW_OK && err != GLEW_ERROR_NO_GLX_DISPLAY) {
+        printf("OpenGL version: %s\n", glGetString(GL_VERSION));
+        fprintf(stderr, "Error: %s\n", glewGetErrorString(err));
+        printf("glewInit() returned: %d\n", err);
+        glfwDestroyWindow(window);
+        glfwTerminate();
+        return 1;
+    }
+
+    // Setup viewport size
+    glViewport(0, 0, buffer_width, buffer_height);
+
+    // Loop until window is closed
+    while (!glfwWindowShouldClose(window)) {
+        // Get and handle user input events
+        glfwPollEvents();
+
+        // Clear window
+        glClearColor(1.0f, 0.9f, 0.4f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+
+        // We usually have two buffers, the first is hidden and that's the one
+        // we draw to. The second is the one we display, so when we're done drawing
+        // we call this glfwSwapBuffers() to swap the buffers to show the one we've
+        // been drawing to so that it now shows. We then can start drawing on the
+        // other buffer.
+        glfwSwapBuffers(window);
+    }
+
+    return 0;
+}