Upgrade project to libgdx 1.12.1

lwjgl3/src/main/java/de/samdev/colorrunner/lwjgl3/Lwjgl3Launcher.java

@@ -0,0 +1,31 @@
+package de.samdev.colorrunner.lwjgl3;
+
+import com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application;
+import com.badlogic.gdx.backends.lwjgl3.Lwjgl3ApplicationConfiguration;
+import de.samdev.colorrunner.CRGame;
+
+/** Launches the desktop (LWJGL3) application. */
+public class Lwjgl3Launcher {
+    public static void main(String[] args) {
+        if (StartupHelper.startNewJvmIfRequired()) return; // This handles macOS support and helps on Windows.
+        createApplication();
+    }
+
+    private static Lwjgl3Application createApplication() {
+        return new Lwjgl3Application(new CRGame(), getDefaultConfiguration());
+    }
+
+    private static Lwjgl3ApplicationConfiguration getDefaultConfiguration() {
+        Lwjgl3ApplicationConfiguration configuration = new Lwjgl3ApplicationConfiguration();
+        configuration.setTitle("ColorRunner");
+        configuration.useVsync(true);
+        //// Limits FPS to the refresh rate of the currently active monitor.
+        configuration.setForegroundFPS(Lwjgl3ApplicationConfiguration.getDisplayMode().refreshRate);
+        //// If you remove the above line and set Vsync to false, you can get unlimited FPS, which can be
+        //// useful for testing performance, but can also be very stressful to some hardware.
+        //// You may also need to configure GPU drivers to fully disable Vsync; this can cause screen tearing.
+        configuration.setWindowedMode(640, 480);
+        configuration.setWindowIcon("libgdx128.png", "libgdx64.png", "libgdx32.png", "libgdx16.png");
+        return configuration;
+    }
+}

lwjgl3/src/main/java/de/samdev/colorrunner/lwjgl3/StartupHelper.java

@@ -0,0 +1,179 @@
+/*
+ * Copyright 2020 damios
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+//Note, the above license and copyright applies to this file only.
+
+package de.samdev.colorrunner.lwjgl3;
+
+import org.lwjgl.system.macosx.LibC;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.InputStreamReader;
+import java.lang.management.ManagementFactory;
+import java.util.ArrayList;
+
+/**
+ * Adds some utilities to ensure that the JVM was started with the
+ * {@code -XstartOnFirstThread} argument, which is required on macOS for LWJGL 3
+ * to function. Also helps on Windows when users have names with characters from
+ * outside the Latin alphabet, a common cause of startup crashes.
+ * <br>
+ * <a href="https://jvm-gaming.org/t/starting-jvm-on-mac-with-xstartonfirstthread-programmatically/57547">Based on this java-gaming.org post by kappa</a>
+ * @author damios
+ */
+public class StartupHelper {
+
+    private static final String JVM_RESTARTED_ARG = "jvmIsRestarted";
+
+    private StartupHelper() {
+        throw new UnsupportedOperationException();
+    }
+
+    /**
+     * Starts a new JVM if the application was started on macOS without the
+     * {@code -XstartOnFirstThread} argument. This also includes some code for
+     * Windows, for the case where the user's home directory includes certain
+     * non-Latin-alphabet characters (without this code, most LWJGL3 apps fail
+     * immediately for those users). Returns whether a new JVM was started and
+     * thus no code should be executed.
+     * <p>
+     * <u>Usage:</u>
+     *
+     * <pre><code>
+     * public static void main(String... args) {
+     * 	if (StartupHelper.startNewJvmIfRequired(true)) return; // This handles macOS support and helps on Windows.
+     * 	// after this is the actual main method code
+     * }
+     * </code></pre>
+     *
+     * @param redirectOutput
+     *            whether the output of the new JVM should be rerouted to the
+     *            old JVM, so it can be accessed in the same place; keeps the
+     *            old JVM running if enabled
+     * @return whether a new JVM was started and thus no code should be executed
+     *         in this one
+     */
+    public static boolean startNewJvmIfRequired(boolean redirectOutput) {
+        String osName = System.getProperty("os.name").toLowerCase();
+        if (!osName.contains("mac")) {
+            if (osName.contains("windows")) {
+// Here, we are trying to work around an issue with how LWJGL3 loads its extracted .dll files.
+// By default, LWJGL3 extracts to the directory specified by "java.io.tmpdir", which is usually the user's home.
+// If the user's name has non-ASCII (or some non-alphanumeric) characters in it, that would fail.
+// By extracting to the relevant "ProgramData" folder, which is usually "C:\ProgramData", we avoid this.
+                System.setProperty("java.io.tmpdir", System.getenv("ProgramData") + "/libGDX-temp");
+            }
+            return false;
+        }
+
+        // There is no need for -XstartOnFirstThread on Graal native image
+        if (!System.getProperty("org.graalvm.nativeimage.imagecode", "").isEmpty()) {
+            return false;
+        }
+
+        long pid = LibC.getpid();
+
+        // check whether -XstartOnFirstThread is enabled
+        if ("1".equals(System.getenv("JAVA_STARTED_ON_FIRST_THREAD_" + pid))) {
+            return false;
+        }
+
+        // check whether the JVM was previously restarted
+        // avoids looping, but most certainly leads to a crash
+        if ("true".equals(System.getProperty(JVM_RESTARTED_ARG))) {
+            System.err.println(
+                    "There was a problem evaluating whether the JVM was started with the -XstartOnFirstThread argument.");
+            return false;
+        }
+
+        // Restart the JVM with -XstartOnFirstThread
+        ArrayList<String> jvmArgs = new ArrayList<>();
+        String separator = System.getProperty("file.separator");
+        // The following line is used assuming you target Java 8, the minimum for LWJGL3.
+        String javaExecPath = System.getProperty("java.home") + separator + "bin" + separator + "java";
+        // If targeting Java 9 or higher, you could use the following instead of the above line:
+        //String javaExecPath = ProcessHandle.current().info().command().orElseThrow();
+
+        if (!(new File(javaExecPath)).exists()) {
+            System.err.println(
+                    "A Java installation could not be found. If you are distributing this app with a bundled JRE, be sure to set the -XstartOnFirstThread argument manually!");
+            return false;
+        }
+
+        jvmArgs.add(javaExecPath);
+        jvmArgs.add("-XstartOnFirstThread");
+        jvmArgs.add("-D" + JVM_RESTARTED_ARG + "=true");
+        jvmArgs.addAll(ManagementFactory.getRuntimeMXBean().getInputArguments());
+        jvmArgs.add("-cp");
+        jvmArgs.add(System.getProperty("java.class.path"));
+        String mainClass = System.getenv("JAVA_MAIN_CLASS_" + pid);
+        if (mainClass == null) {
+            StackTraceElement[] trace = Thread.currentThread().getStackTrace();
+            if (trace.length > 0) {
+                mainClass = trace[trace.length - 1].getClassName();
+            } else {
+                System.err.println("The main class could not be determined.");
+                return false;
+            }
+        }
+        jvmArgs.add(mainClass);
+
+        try {
+            if (!redirectOutput) {
+                ProcessBuilder processBuilder = new ProcessBuilder(jvmArgs);
+                processBuilder.start();
+            } else {
+                Process process = (new ProcessBuilder(jvmArgs))
+                        .redirectErrorStream(true).start();
+                BufferedReader processOutput = new BufferedReader(
+                        new InputStreamReader(process.getInputStream()));
+                String line;
+
+                while ((line = processOutput.readLine()) != null) {
+                    System.out.println(line);
+                }
+
+                process.waitFor();
+            }
+        } catch (Exception e) {
+            System.err.println("There was a problem restarting the JVM");
+            e.printStackTrace();
+        }
+
+        return true;
+    }
+
+    /**
+     * Starts a new JVM if the application was started on macOS without the
+     * {@code -XstartOnFirstThread} argument. Returns whether a new JVM was
+     * started and thus no code should be executed. Redirects the output of the
+     * new JVM to the old one.
+     * <p>
+     * <u>Usage:</u>
+     *
+     * <pre>
+     * public static void main(String... args) {
+     * 	if (StartupHelper.startNewJvmIfRequired()) return; // This handles macOS support and helps on Windows.
+     * 	// the actual main method code
+     * }
+     * </pre>
+     *
+     * @return whether a new JVM was started and thus no code should be executed
+     *         in this one
+     */
+    public static boolean startNewJvmIfRequired() {
+        return startNewJvmIfRequired(true);
+    }
+}