Add a Vulkan renderer backend to imgui-lwjgl3

example/src/main/java/ExampleVulkan.java

@@ -0,0 +1,29 @@
+import imgui.ImGui;
+import imgui.app.Application;
+import imgui.app.Backend;
+import imgui.app.Configuration;
+
+/**
+ * Smoke-test entry point for the Vulkan backend. Run with:
+ * <pre>
+ * ./gradlew :example:run -PmainClass=ExampleVulkan
+ * </pre>
+ */
+public class ExampleVulkan extends Application {
+    @Override
+    protected void configure(final Configuration config) {
+        config.setTitle("Example Application — Vulkan");
+        config.setBackend(Backend.VULKAN);
+    }
+
+    @Override
+    public void process() {
+        ImGui.begin("Vulkan");
+        ImGui.text("Hello from the Vulkan backend!");
+        ImGui.end();
+    }
+
+    public static void main(final String[] args) {
+        launch(new ExampleVulkan());
+    }
+}

imgui-app/build.gradle

@@ -23,6 +23,7 @@ dependencies {
     api 'org.lwjgl:lwjgl-glfw'
     api 'org.lwjgl:lwjgl-opengl'
     api 'org.lwjgl:lwjgl-sdl'
+    api 'org.lwjgl:lwjgl-vulkan'
 
     ['natives-linux', 'natives-windows', 'natives-windows-arm64', 'natives-macos', 'natives-macos-arm64'].each {
         api "org.lwjgl:lwjgl::$it"
@@ -31,6 +32,10 @@ dependencies {
         api "org.lwjgl:lwjgl-sdl::$it"
     }
 
+    ['natives-macos', 'natives-macos-arm64'].each {
+        api "org.lwjgl:lwjgl-vulkan::$it"
+    }
+
     api project(':imgui-binding')
     api project(':imgui-lwjgl3')
 }

imgui-app/src/main/java/imgui/app/Application.java

@@ -9,9 +9,8 @@
  * <h2>Life-cycle</h2>
  * <p>The entry point for ImGui applications is the Application class and {@link #launch(Application)} method.
  * It builds a {@link Configuration}, lets the user customize it (including selecting a {@link Backend}), then
- * instantiates the matching {@link Window} subclass ({@link WindowGlfw}, {@link WindowSdl} or
- * {@link WindowSdlRenderer}) and drives the
- * application loop:
+ * instantiates the matching {@link Window} subclass ({@link WindowGlfw}, {@link WindowSdl},
+ * {@link WindowSdlRenderer} or {@link WindowVulkan}) and drives the application loop:
  *
  * <ol>
  *     <li>{@link #configure(Configuration)} It's called before window creation, so only basic application setups are expected.</li>
@@ -142,6 +141,9 @@ public static void launch(final Application app) {
             case SDL_RENDERER:
                 app.window = new WindowSdlRenderer();
                 break;
+            case VULKAN:
+                app.window = new WindowVulkan();
+                break;
             case GLFW:
             default:
                 app.window = new WindowGlfw();

imgui-app/src/main/java/imgui/app/Backend.java

@@ -15,5 +15,9 @@ public enum Backend {
     /**
      * SDL3 platform + SDL_Renderer renderer.
      */
-    SDL_RENDERER
+    SDL_RENDERER,
+    /**
+     * GLFW platform + Vulkan renderer.
+     */
+    VULKAN
 }

imgui-app/src/main/java/imgui/app/Window.java

@@ -2,8 +2,8 @@
 
 /**
  * Abstract base for an application window. Subclasses bind a specific platform/renderer pair
- * (see {@link WindowGlfw}, {@link WindowSdl}, {@link WindowSdlRenderer}) and forward lifecycle hooks back to the owning
- * {@link Application} via {@link #owner}.
+ * (see {@link WindowGlfw}, {@link WindowSdl}, {@link WindowSdlRenderer} or {@link WindowVulkan}) and
+ * forward lifecycle hooks back to the owning {@link Application} via {@link #owner}.
  *
  * <p>Direct subclassing is supported but the supported integration path is to extend
  * {@link Application} and select a backend through {@link Configuration#setBackend(Backend)}.