LibGDX Raspberry Pi 使用 JOGL - 运行 出错
LibGDX on Raspberry Pi using JOGL - error on run
我正在尝试 运行 LibGDX 桌面应用程序（一个简单的应用程序，只显示图像，没有其他内容）在 Raspberry Pi 2 上使用 JOGL 后端（https://github.com/gouessej/libgdx/).
在当前的 libgdx 版本中，JoglApplicationConfiguration 是抽象的，并且有 2 个子 classes：JoglAwtApplicationConfiguration 和 JoglNewtApplicationConfiguration。
当我尝试使用 JoglAwtApplicationConfiguration 运行 时，出现错误：
[java] glGetError 0x500
[java] glGetError 0x500
[java] JoglApplication: Couldn't initialize audio, disabling audio
[java] java.lang.ExceptionInInitializerError
[java] at com.badlogic.gdx.backends.jogamp.JoglApplicationBase.<init>(JoglApplicationBase.java:54)
[java] at com.badlogic.gdx.backends.jogamp.JoglNewtApplication.<init>(JoglNewtApplication.java:49)
[java] at com.mygdx.game.desktop.DesktopLauncher.main(DesktopLauncher.java:14)
[java] Caused by: com.jogamp.openal.ALException: Error opening default OpenAL device
[java] at com.jogamp.openal.util.ALut.alutInit(ALut.java:69)
[java] at com.badlogic.gdx.backends.jogamp.audio.OpenALAudio.<clinit>(OpenALAudio.java:41)
[java] ... 3 more
[java] AL lib: (EE) ALCplaybackOSS_open: Could not open /dev/dsp: Nie ma takiego pliku ani katalogu
[java] glGetError 0x500
[java] Exception in thread "main-Animator#00" com.jogamp.opengl.util.AnimatorBase$UncaughtAnimatorException: com.jogamp.opengl.GLException: Caught NoSuchFieldError: gl on thread main-Animator#00
[java] at com.jogamp.opengl.util.DefaultAnimatorImpl.display(DefaultAnimatorImpl.java:61)
[java] at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:451)
[java] at com.jogamp.opengl.util.Animator$MainLoop.run(Animator.java:198)
[java] at java.lang.Thread.run(Thread.java:724)
[java] Caused by: com.jogamp.opengl.GLException: Caught NoSuchFieldError: gl on thread main-Animator#00
[java] at com.jogamp.opengl.GLException.newGLException(GLException.java:76)
[java] at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1311)
[java] at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1131)
[java] at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:680)
[java] at com.jogamp.opengl.util.DefaultAnimatorImpl.display(DefaultAnimatorImpl.java:54)
[java] ... 3 more
[java] Caused by: java.lang.NoSuchFieldError: gl
[java] at com.mygdx.game.MyGdxGame.render(MyGdxGame.java:21)
[java] at com.badlogic.gdx.backends.jogamp.JoglGraphicsBase.display(JoglGraphicsBase.java:164)
[java] at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:691)
[java] at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:673)
[java] at jogamp.opengl.GLAutoDrawableBase.run(GLAutoDrawableBase.java:442)
[java] at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1277)
[java] ... 6 more
[java] EGLDisplayUtil.EGLDisplays: Shutdown (open: 1)
[java] EGLDisplayUtil: Open EGL Display Connections: 1
[java] EGLDisplayUtil: Open[0]: 0x1: EGLDisplayRef[0x1: refCnt 2]
在使用 JoglNewtApplicationConfiguration 时出现其他错误：
[java] glGetError 0x500
[java] glGetError 0x500
[java] JoglApplication: Couldn't initialize audio, disabling audio
[java] java.lang.ExceptionInInitializerError
[java] at com.badlogic.gdx.backends.jogamp.JoglApplicationBase.<init>(JoglApplicationBase.java:54)
[java] at com.badlogic.gdx.backends.jogamp.JoglAwtApplication.<init>(JoglAwtApplication.java:49)
[java] at com.mygdx.game.desktop.DesktopLauncher.main(DesktopLauncher.java:16)
[java] Caused by: com.jogamp.openal.ALException: Error opening default OpenAL device
[java] at com.jogamp.openal.util.ALut.alutInit(ALut.java:69)
[java] at com.badlogic.gdx.bacAL lib: (EE) ALCplaybackOSS_open: Could not open /dev/dsp: Nie ma takiego pliku ani katalogu
[java] kends.jogamp.audio.OpenALAudio.<clinit>(OpenALAudio.java:41)
[java] ... 3 more
[java] Exception in thread "main" com.badlogic.gdx.utils.GdxRuntimeException: Creating window failed
[java] at com.badlogic.gdx.backends.jogamp.JoglAwtApplication.<init>(JoglAwtApplication.java:103)
[java] at com.mygdx.game.desktop.DesktopLauncher.main(DesktopLauncher.java:16)
[java] Caused by: java.lang.reflect.InvocationTargetException
[java] at java.awt.EventQueue.invokeAndWait(EventQueue.java:1272)
[java] at java.awt.EventQueue.invokeAndWait(EventQueue.java:1247)
[java] at com.badlogic.gdx.backends.jogamp.JoglAwtApplication.<init>(JoglAwtApplication.java:101)
[java] ... 1 more
[java] Caused by: java.lang.ClassCastException: com.jogamp.nativewindow.DefaultGraphicsConfiguration cannot be cast to com.jogamp.nativewindow.awt.AWTGraphicsConfiguration
[java] at com.jogamp.opengl.awt.GLCanvas.chooseGraphicsConfiguration(GLCanvas.java:1557)
[java] at com.jogamp.opengl.awt.GLCanvas.addNotify(GLCanvas.java:615)
[java] at java.awt.Container.addNotify(Container.java:2769)
[java] at java.awt.Window.addNotify(Window.java:770)
[java] at java.awt.Frame.addNotify(Frame.java:487)
[java] at java.awt.Window.pack(Window.java:807)
[java] at com.badlogic.gdx.backends.jogamp.JoglAwtApplication.run(JoglAwtApplication.java:63)
[java] at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
[java] at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
[java] at java.awt.EventQueue.access0(EventQueue.java:103)
[java] at java.awt.EventQueue.run(EventQueue.java:694)
[java] at java.awt.EventQueue.run(EventQueue.java:692)
[java] at java.security.AccessController.doPrivileged(Native Method)
[java] at java.security.ProtectionDomain.doIntersectionPrivilege(ProtectionDomain.java:76)
[java] at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
[java] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
[java] at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
[java] at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
[java] at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
[java] at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
[java] at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
同时使用这两者，应用程序构建正常，但在我尝试 运行 时出现错误。
有人可以帮助我吗？
我的应用程序代码（使用 libgdx 生成器生成）：
package com.mygdx.game;
import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
public class MyGdxGame extends ApplicationAdapter {
SpriteBatch batch;
Texture img;
@Override
public void create () {
batch = new SpriteBatch();
img = new Texture("badlogic.jpg");
}
@Override
public void render () {
Gdx.gl.glClearColor(1, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
batch.begin();
batch.draw(img, 0, 0);
batch.end();
}
}
和启动器class：
package com.mygdx.game.desktop;
import com.badlogic.gdx.backends.jogamp.*;
import com.mygdx.game.MyGdxGame;
public class DesktopLauncher {
public static void main (String[] arg) {
JoglNewtApplicationConfiguration config = new JoglNewtApplicationConfiguration();
new JoglNewtApplication(new MyGdxGame(), config);
// OR:
//JoglAwtApplicationConfiguration config = new JoglAwtApplicationConfiguration();
//new JoglAwtApplication(new MyGdxGame(), config);
}
}
如果OpenAL初始化失败
"AL lib: (EE) ALCplaybackOSS_open: Could not open /dev/dsp: No such file or directory"
这源于 libopenal 声音库，
未能找到您的 raspberry pi 声卡
那么你有三个选择：
A) 为 Pi 的声卡加载 OSS linux 内核驱动程序
sudo modprobe snd_pcm_oss
B) 禁用OpenAL软oss驱动：
编辑 /etc/openal/alsoft.conf
并确保驱动程序列表包含 -oss（它禁用尝试使用不存在的 dsp 文件的 OSS 后端）
C) 最好的解决方案是 OpenAL-soft 项目可以检测到 OSS 后端不工作并使用其 ALSA 后端重试，但是这样的解决方案需要有人协作并在上游修补 OpenAL-soft 以让 OpenAl-soft 在 Raspberry Pi 上开箱即用：http://kcat.strangesoft.net/openal.html
我正在尝试 运行 LibGDX 桌面应用程序（一个简单的应用程序，只显示图像，没有其他内容）在 Raspberry Pi 2 上使用 JOGL 后端（https://github.com/gouessej/libgdx/).
在当前的 libgdx 版本中，JoglApplicationConfiguration 是抽象的，并且有 2 个子 classes：JoglAwtApplicationConfiguration 和 JoglNewtApplicationConfiguration。
当我尝试使用 JoglAwtApplicationConfiguration 运行 时，出现错误：
[java] glGetError 0x500
[java] glGetError 0x500
[java] JoglApplication: Couldn't initialize audio, disabling audio
[java] java.lang.ExceptionInInitializerError
[java] at com.badlogic.gdx.backends.jogamp.JoglApplicationBase.<init>(JoglApplicationBase.java:54)
[java] at com.badlogic.gdx.backends.jogamp.JoglNewtApplication.<init>(JoglNewtApplication.java:49)
[java] at com.mygdx.game.desktop.DesktopLauncher.main(DesktopLauncher.java:14)
[java] Caused by: com.jogamp.openal.ALException: Error opening default OpenAL device
[java] at com.jogamp.openal.util.ALut.alutInit(ALut.java:69)
[java] at com.badlogic.gdx.backends.jogamp.audio.OpenALAudio.<clinit>(OpenALAudio.java:41)
[java] ... 3 more
[java] AL lib: (EE) ALCplaybackOSS_open: Could not open /dev/dsp: Nie ma takiego pliku ani katalogu
[java] glGetError 0x500
[java] Exception in thread "main-Animator#00" com.jogamp.opengl.util.AnimatorBase$UncaughtAnimatorException: com.jogamp.opengl.GLException: Caught NoSuchFieldError: gl on thread main-Animator#00
[java] at com.jogamp.opengl.util.DefaultAnimatorImpl.display(DefaultAnimatorImpl.java:61)
[java] at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:451)
[java] at com.jogamp.opengl.util.Animator$MainLoop.run(Animator.java:198)
[java] at java.lang.Thread.run(Thread.java:724)
[java] Caused by: com.jogamp.opengl.GLException: Caught NoSuchFieldError: gl on thread main-Animator#00
[java] at com.jogamp.opengl.GLException.newGLException(GLException.java:76)
[java] at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1311)
[java] at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1131)
[java] at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:680)
[java] at com.jogamp.opengl.util.DefaultAnimatorImpl.display(DefaultAnimatorImpl.java:54)
[java] ... 3 more
[java] Caused by: java.lang.NoSuchFieldError: gl
[java] at com.mygdx.game.MyGdxGame.render(MyGdxGame.java:21)
[java] at com.badlogic.gdx.backends.jogamp.JoglGraphicsBase.display(JoglGraphicsBase.java:164)
[java] at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:691)
[java] at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:673)
[java] at jogamp.opengl.GLAutoDrawableBase.run(GLAutoDrawableBase.java:442)
[java] at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1277)
[java] ... 6 more
[java] EGLDisplayUtil.EGLDisplays: Shutdown (open: 1)
[java] EGLDisplayUtil: Open EGL Display Connections: 1
[java] EGLDisplayUtil: Open[0]: 0x1: EGLDisplayRef[0x1: refCnt 2]
在使用 JoglNewtApplicationConfiguration 时出现其他错误：
[java] glGetError 0x500
[java] glGetError 0x500
[java] JoglApplication: Couldn't initialize audio, disabling audio
[java] java.lang.ExceptionInInitializerError
[java] at com.badlogic.gdx.backends.jogamp.JoglApplicationBase.<init>(JoglApplicationBase.java:54)
[java] at com.badlogic.gdx.backends.jogamp.JoglAwtApplication.<init>(JoglAwtApplication.java:49)
[java] at com.mygdx.game.desktop.DesktopLauncher.main(DesktopLauncher.java:16)
[java] Caused by: com.jogamp.openal.ALException: Error opening default OpenAL device
[java] at com.jogamp.openal.util.ALut.alutInit(ALut.java:69)
[java] at com.badlogic.gdx.bacAL lib: (EE) ALCplaybackOSS_open: Could not open /dev/dsp: Nie ma takiego pliku ani katalogu
[java] kends.jogamp.audio.OpenALAudio.<clinit>(OpenALAudio.java:41)
[java] ... 3 more
[java] Exception in thread "main" com.badlogic.gdx.utils.GdxRuntimeException: Creating window failed
[java] at com.badlogic.gdx.backends.jogamp.JoglAwtApplication.<init>(JoglAwtApplication.java:103)
[java] at com.mygdx.game.desktop.DesktopLauncher.main(DesktopLauncher.java:16)
[java] Caused by: java.lang.reflect.InvocationTargetException
[java] at java.awt.EventQueue.invokeAndWait(EventQueue.java:1272)
[java] at java.awt.EventQueue.invokeAndWait(EventQueue.java:1247)
[java] at com.badlogic.gdx.backends.jogamp.JoglAwtApplication.<init>(JoglAwtApplication.java:101)
[java] ... 1 more
[java] Caused by: java.lang.ClassCastException: com.jogamp.nativewindow.DefaultGraphicsConfiguration cannot be cast to com.jogamp.nativewindow.awt.AWTGraphicsConfiguration
[java] at com.jogamp.opengl.awt.GLCanvas.chooseGraphicsConfiguration(GLCanvas.java:1557)
[java] at com.jogamp.opengl.awt.GLCanvas.addNotify(GLCanvas.java:615)
[java] at java.awt.Container.addNotify(Container.java:2769)
[java] at java.awt.Window.addNotify(Window.java:770)
[java] at java.awt.Frame.addNotify(Frame.java:487)
[java] at java.awt.Window.pack(Window.java:807)
[java] at com.badlogic.gdx.backends.jogamp.JoglAwtApplication.run(JoglAwtApplication.java:63)
[java] at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
[java] at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
[java] at java.awt.EventQueue.access0(EventQueue.java:103)
[java] at java.awt.EventQueue.run(EventQueue.java:694)
[java] at java.awt.EventQueue.run(EventQueue.java:692)
[java] at java.security.AccessController.doPrivileged(Native Method)
[java] at java.security.ProtectionDomain.doIntersectionPrivilege(ProtectionDomain.java:76)
[java] at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
[java] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
[java] at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
[java] at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
[java] at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
[java] at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
[java] at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
同时使用这两者，应用程序构建正常，但在我尝试 运行 时出现错误。 有人可以帮助我吗？
我的应用程序代码（使用 libgdx 生成器生成）：
package com.mygdx.game;
import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
public class MyGdxGame extends ApplicationAdapter {
SpriteBatch batch;
Texture img;
@Override
public void create () {
batch = new SpriteBatch();
img = new Texture("badlogic.jpg");
}
@Override
public void render () {
Gdx.gl.glClearColor(1, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
batch.begin();
batch.draw(img, 0, 0);
batch.end();
}
}
和启动器class：
package com.mygdx.game.desktop;
import com.badlogic.gdx.backends.jogamp.*;
import com.mygdx.game.MyGdxGame;
public class DesktopLauncher {
public static void main (String[] arg) {
JoglNewtApplicationConfiguration config = new JoglNewtApplicationConfiguration();
new JoglNewtApplication(new MyGdxGame(), config);
// OR:
//JoglAwtApplicationConfiguration config = new JoglAwtApplicationConfiguration();
//new JoglAwtApplication(new MyGdxGame(), config);
}
}
如果OpenAL初始化失败 "AL lib: (EE) ALCplaybackOSS_open: Could not open /dev/dsp: No such file or directory" 这源于 libopenal 声音库， 未能找到您的 raspberry pi 声卡 那么你有三个选择：
A) 为 Pi 的声卡加载 OSS linux 内核驱动程序
sudo modprobe snd_pcm_oss
B) 禁用OpenAL软oss驱动： 编辑 /etc/openal/alsoft.conf 并确保驱动程序列表包含 -oss（它禁用尝试使用不存在的 dsp 文件的 OSS 后端）
C) 最好的解决方案是 OpenAL-soft 项目可以检测到 OSS 后端不工作并使用其 ALSA 后端重试，但是这样的解决方案需要有人协作并在上游修补 OpenAL-soft 以让 OpenAl-soft 在 Raspberry Pi 上开箱即用：http://kcat.strangesoft.net/openal.html