From 888c438b55a54706766d6455debdf2fb4b2b0378 Mon Sep 17 00:00:00 2001
From: Florian RICHER <florian.richer@protonmail.com>
Date: Thu, 10 Oct 2024 20:57:31 +0200
Subject: [PATCH] First work

---
 pom.xml                                       |  67 +++++++++---
 .../java/fr/mrdev023/vulkan_java/App.java     | 100 +++++++++++++++++-
 2 files changed, 151 insertions(+), 16 deletions(-)

diff --git a/pom.xml b/pom.xml
index 54d4c2d..c3f2b43 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,6 +14,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.compiler.release>22</maven.compiler.release>
+    <lwjgl.version>3.2.3</lwjgl.version>
   </properties>
 
   <dependencyManagement>
@@ -25,21 +26,6 @@
         <type>pom</type>
         <scope>import</scope>
       </dependency>
-      <dependency>
-        <groupId>org.lwjgl</groupId>
-        <artifactId>lwjgl</artifactId>
-        <version>3.2.3</version>
-      </dependency>
-      <dependency>
-        <groupId>org.lwjgl</groupId>
-        <artifactId>lwjgl-glfw</artifactId>
-        <version>3.2.3</version>
-      </dependency>
-      <dependency>
-        <groupId>org.lwjgl</groupId>
-        <artifactId>lwjgl-vulkan</artifactId>
-        <version>3.2.3</version>
-      </dependency>
     </dependencies>
   </dependencyManagement>
 
@@ -55,6 +41,57 @@
       <artifactId>junit-jupiter-params</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl</artifactId>
+      <version>${lwjgl.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl</artifactId>
+      <version>${lwjgl.version}</version>
+      <classifier>natives-windows</classifier>
+    </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl</artifactId>
+      <version>${lwjgl.version}</version>
+      <classifier>natives-macos</classifier>
+    </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl</artifactId>
+      <version>${lwjgl.version}</version>
+      <classifier>natives-linux</classifier>
+    </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl-glfw</artifactId>
+      <version>${lwjgl.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl-glfw</artifactId>
+      <version>${lwjgl.version}</version>
+      <classifier>natives-windows</classifier>
+    </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl-glfw</artifactId>
+      <version>${lwjgl.version}</version>
+      <classifier>natives-macos</classifier>
+    </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl-glfw</artifactId>
+      <version>${lwjgl.version}</version>
+      <classifier>natives-linux</classifier>
+    </dependency>
+    <dependency>
+      <groupId>org.lwjgl</groupId>
+      <artifactId>lwjgl-vulkan</artifactId>
+      <version>${lwjgl.version}</version>
+    </dependency>
   </dependencies>
 
   <build>
diff --git a/src/main/java/fr/mrdev023/vulkan_java/App.java b/src/main/java/fr/mrdev023/vulkan_java/App.java
index 973e61d..6785f53 100644
--- a/src/main/java/fr/mrdev023/vulkan_java/App.java
+++ b/src/main/java/fr/mrdev023/vulkan_java/App.java
@@ -1,10 +1,108 @@
 package fr.mrdev023.vulkan_java;
 
+import org.lwjgl.*;
+import org.lwjgl.glfw.*;
+import org.lwjgl.system.*;
+
+import java.nio.*;
+
+import static org.lwjgl.glfw.Callbacks.*;
+import static org.lwjgl.glfw.GLFW.*;
+import static org.lwjgl.system.MemoryStack.*;
+import static org.lwjgl.system.MemoryUtil.*;
+
 /**
  * Hello world!
  */
 public class App {
+    // The window handle
+    private long window;
+
+    public void run() {
+        System.out.println("Hello LWJGL " + Version.getVersion() + "!");
+
+        init();
+        loop();
+
+        // Free the window callbacks and destroy the window
+        glfwFreeCallbacks(window);
+        glfwDestroyWindow(window);
+
+        // Terminate GLFW and free the error callback
+        glfwTerminate();
+        glfwSetErrorCallback(null).free();
+    }
+
+    private void init() {
+        // Setup an error callback. The default implementation
+        // will print the error message in System.err.
+        GLFWErrorCallback.createPrint(System.err).set();
+
+        // Initialize GLFW. Most GLFW functions will not work before doing this.
+        if ( !glfwInit() )
+            throw new IllegalStateException("Unable to initialize GLFW");
+
+        // Configure GLFW
+        glfwDefaultWindowHints(); // optional, the current window hints are already the default
+        glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE); // the window will stay hidden after creation
+        glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE); // the window will be resizable
+
+        // Create the window
+        window = glfwCreateWindow(300, 300, "Hello World!", NULL, NULL);
+        if ( window == NULL )
+            throw new RuntimeException("Failed to create the GLFW window");
+
+        // Setup a key callback. It will be called every time a key is pressed, repeated or released.
+        glfwSetKeyCallback(window, (window, key, scancode, action, mods) -> {
+            if ( key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE )
+                glfwSetWindowShouldClose(window, true); // We will detect this in the rendering loop
+        });
+
+        // Get the thread stack and push a new frame
+        try ( MemoryStack stack = stackPush() ) {
+            IntBuffer pWidth = stack.mallocInt(1); // int*
+            IntBuffer pHeight = stack.mallocInt(1); // int*
+
+            // Get the window size passed to glfwCreateWindow
+            glfwGetWindowSize(window, pWidth, pHeight);
+
+            // Get the resolution of the primary monitor
+            GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
+
+            // Center the window
+            glfwSetWindowPos(
+                    window,
+                    (vidmode.width() - pWidth.get(0)) / 2,
+                    (vidmode.height() - pHeight.get(0)) / 2
+            );
+        } // the stack frame is popped automatically
+
+        // Make the OpenGL context current
+        glfwMakeContextCurrent(window);
+        // Enable v-sync
+        glfwSwapInterval(1);
+
+        // Make the window visible
+        glfwShowWindow(window);
+    }
+
+    private void loop() {
+
+
+        // Run the rendering loop until the user has attempted to close
+        // the window or has pressed the ESCAPE key.
+        while ( !glfwWindowShouldClose(window) ) {
+            // Replace by clear framebuffer on vulkan
+
+            glfwSwapBuffers(window); // swap the color buffers
+
+            // Poll for window events. The key callback above will only be
+            // invoked during this call.
+            glfwPollEvents();
+        }
+    }
+
     public static void main(String[] args) {
-        System.out.println("Hello World!");
+        new App().run();
     }
 }