Hello GLFW

CMakeLists.txt

@@ -5,5 +5,8 @@ project(pt-playground)
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+add_subdirectory(external)
+
 add_executable(pt src/main.cpp)
+target_link_libraries(pt PRIVATE glfw)
 set_target_properties(pt PROPERTIES COMPILE_WARNING_AS_ERROR ON)

external/CMakeLists.txt

@@ -0,0 +1,12 @@
+include(FetchContent)
+
+# Declare
+FetchContent_Declare(glfw
+    GIT_REPOSITORY "https://github.com/glfw/glfw"
+    GIT_TAG 7482de6) # 3.3.8
+
+# Fetch
+message(STATUS "Fetching glfw...")
+FetchContent_MakeAvailable(glfw)
+
+# Configure

src/main.cpp

@@ -1,6 +1,50 @@
+#include <chrono>
 #include <cstdio>
 
+#include <thread>
+
+#include <GLFW/glfw3.h>
+
+inline constexpr int defaultWindowWidth = 640;
+inline constexpr int defaultWindowHeight = 480;
+
 int main()
 {
-    std::printf("Hello, world\n");
+    if (!glfwInit())
+    {
+        std::fprintf(stderr, "Failed to initialize GLFW\n");
+        return -1;
+    }
+
+    GLFWwindow* const window = glfwCreateWindow(
+        defaultWindowWidth, defaultWindowHeight, "pt-playground 🛝", nullptr, nullptr);
+    if (!window)
+    {
+        std::fprintf(stderr, "Failed to create GLFW window\n");
+        glfwTerminate();
+        return -1;
+    }
+
+    {
+        glfwMakeContextCurrent(window);
+
+        while (!glfwWindowShouldClose(window))
+        {
+            glfwPollEvents();
+
+            if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+            {
+                glfwSetWindowShouldClose(window, GLFW_TRUE);
+            }
+
+            glfwSwapBuffers(window);
+
+            std::this_thread::sleep_for(std::chrono::milliseconds(16));
+        }
+    }
+
+    glfwDestroyWindow(window);
+    glfwTerminate();
+
+    return 0;
 }