feat: open window with GLFW on Windows

CMakeLists.txt

@@ -1,5 +1,17 @@
 cmake_minimum_required(VERSION 3.27)
+project(HelloGLFW)
 
-project(HelloWorld)
+# Define platform-specific paths and libraries
+if(WIN32)
+    set(GLFW_PATH "C:/libs/glfw-3.3.8.bin.WIN64")
+    include_directories(${GLFW_PATH}/include)
+    link_directories(${GLFW_PATH}/lib-vc2022)
+elseif(UNIX OR APPLE)
+    message(FATAL_ERROR "Linux and macOS platforms are not supported yet.")
+endif()
 
-add_executable(${PROJECT_NAME} hello.cpp)
+add_executable(${PROJECT_NAME} hello.cpp)
+
+if(WIN32)
+    target_link_libraries(${PROJECT_NAME} glfw3)
+endif()

hello.cpp

@@ -8,11 +8,39 @@
 // cd build
 // cmake ..
 // cmake --build .
+// The last step compiles the executable - this can also be done from Visual
+// Studio
 
-#include <iostream>
+// Install GLFW 3.3.8
+// https://www.glfw.org/download.html
+// On Windows:
+// extract the downloaded .zip file to "C:/libs"; this is currently expected
+// by our CMakeLists.txt.
+
+// To run in VS
+// Set startup project in Solution Explorer
+
+#include <GLFW/glfw3.h>
 
 int main()
 {
-    std::cout << "Hello, World!" << std::endl;
+    if (!glfwInit())
+        return -1;
+
+    GLFWwindow* window = glfwCreateWindow(640, 480, "Hello GLFW", NULL, NULL);
+    if (!window)
+    {
+        glfwTerminate();
+        return -1;
+    }
+
+    glfwMakeContextCurrent(window);
+
+    while (!glfwWindowShouldClose(window))
+    {
+        glfwPollEvents();
+    }
+
+    glfwTerminate();
     return 0;
 }