Question

当我运行我的测试JOGL应用程序时，它表示根据OpenGl Extensions Viewer我的系统支持最多OpenGL 4.1 时，我在线程上只有GL2可用。

有没有人看到任何明显的原因为什么线程中只支持GL2？

我使用的是2015年中期的Macbook Pro，搭配Intel Iris和AMD Radeon R9显卡。

这是本书中的第一个练习[使用Java在OpenGL中进行计算机图形编程]。4

Java版：Java8

JOGL版本：2.3.2

GlueGen版本：2.3.2

import java.nio.*;
import javax.swing.*;
import static com.jogamp.opengl.GL4.*;
import com.jogamp.opengl.*;
import com.jogamp.opengl.awt.GLCanvas;
import com.jogamp.common.nio.Buffers;

public class Code extends JFrame implements GLEventListener {
    private GLCanvas myCanvas;

    public Code() {
        setTitle("Chapter 2 - program1");
        setSize(600, 400);
        setLocation(200, 200);
        myCanvas = new GLCanvas();
        myCanvas.addGLEventListener(this);
        this.add(myCanvas);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    public void display(GLAutoDrawable drawable) {
        GL4 gl = (GL4) GLContext.getCurrentGL();
        drawable.setGL(new DebugGL4(gl));
        float bkg[] = { 1.0f, 0.0f, 0.0f, 1.0f };
        FloatBuffer bkgBuffer = Buffers.newDirectFloatBuffer(bkg);
        gl.glClearBufferfv(GL_COLOR, 0, bkgBuffer);
    }

    public static void main(String[] args) {
        new Code();
    }

    public void init(GLAutoDrawable drawable) {
        GL4 gl = drawable.getGL().getGL4(); // This is where the code fails
        String version = gl.glGetString(GL4.GL_VERSION);
        String shaderversion = gl.glGetString(GL4.GL_SHADING_LANGUAGE_VERSION);
        System.out.println("GLVERSION: " + version + " shading language: " + shaderversion );
    }

    public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) { }
    public void dispose(GLAutoDrawable drawable) { }
}

例外：

/Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/bin/java -Didea.launcher.port=7535 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA.app/Contents/bin" -classpath /private/var/folders/rd/tltb7sk928x_n429dyctdt8c0000gn/T/classpath1.jar -Dfile.encoding=UTF-8 com.intellij.rt.execution.application.AppMain Code
Exception in thread "AWT-EventQueue-0" com.jogamp.opengl.GLException: Caught GLException: Not a GL4 implementation on thread AWT-EventQueue-0
    at com.jogamp.opengl.GLException.newGLException(GLException.java:76)
    at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1327)
    at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1147)
    at com.jogamp.opengl.awt.GLCanvas$12.run(GLCanvas.java:1438)
    at com.jogamp.opengl.Threading.invoke(Threading.java:223)
    at com.jogamp.opengl.awt.GLCanvas.display(GLCanvas.java:505)
    at com.jogamp.opengl.awt.GLCanvas.paint(GLCanvas.java:559)
    at sun.awt.RepaintArea.paintComponent(RepaintArea.java:264)
    at sun.lwawt.LWRepaintArea.paintComponent(LWRepaintArea.java:59)
    at sun.awt.RepaintArea.paint(RepaintArea.java:240)
    at sun.lwawt.LWComponentPeer.handleJavaPaintEvent(LWComponentPeer.java:1314)
    at sun.lwawt.LWComponentPeer.handleEvent(LWComponentPeer.java:1198)
    at java.awt.Component.dispatchEventImpl(Component.java:4965)
    at java.awt.Component.dispatchEvent(Component.java:4711)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: com.jogamp.opengl.GLException: Not a GL4 implementation
    at jogamp.opengl.gl4.GL4bcImpl.getGL4(GL4bcImpl.java:40464)
    at Code.init(Code.java:38)
    at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:644)
    at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:667)
    at com.jogamp.opengl.awt.GLCanvas$10.run(GLCanvas.java:1407)
    at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1291)
    ... 30 more
Exception in thread "AWT-EventQueue-0" com.jogamp.opengl.GLException: Caught GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glActiveTexture(<int> 0x84C0): GL_INVALID_OPERATION ( 1282 0x502),  on thread AWT-EventQueue-0
    at com.jogamp.opengl.GLException.newGLException(GLException.java:76)
    at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1327)
    at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1147)
    at com.jogamp.opengl.awt.GLCanvas$12.run(GLCanvas.java:1438)
    at com.jogamp.opengl.Threading.invoke(Threading.java:223)
    at com.jogamp.opengl.awt.GLCanvas.display(GLCanvas.java:505)
    at com.jogamp.opengl.awt.GLCanvas.paint(GLCanvas.java:559)
    at com.jogamp.opengl.awt.GLCanvas.update(GLCanvas.java:866)
    at sun.awt.RepaintArea.updateComponent(RepaintArea.java:255)
    at sun.lwawt.LWRepaintArea.updateComponent(LWRepaintArea.java:47)
    at sun.awt.RepaintArea.paint(RepaintArea.java:232)
    at sun.lwawt.LWComponentPeer.handleJavaPaintEvent(LWComponentPeer.java:1314)
    at sun.lwawt.LWComponentPeer.handleEvent(LWComponentPeer.java:1198)
    at java.awt.Component.dispatchEventImpl(Component.java:4965)
    at java.awt.Component.dispatchEvent(Component.java:4711)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: com.jogamp.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glActiveTexture(<int> 0x84C0): GL_INVALID_OPERATION ( 1282 0x502), 
    at com.jogamp.opengl.DebugGL4bc.writeGLError(DebugGL4bc.java:31803)
    at com.jogamp.opengl.DebugGL4bc.glActiveTexture(DebugGL4bc.java:232)
    at jogamp.opengl.GLFBODrawableImpl.swapFBOImpl(GLFBODrawableImpl.java:471)
    at jogamp.opengl.GLFBODrawableImpl.swapBuffersImpl(GLFBODrawableImpl.java:426)
    at jogamp.opengl.GLDrawableImpl.swapBuffers(GLDrawableImpl.java:88)
    at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1295)
    ... 31 more

Process finished with exit code 0

Answer 1

事实证明，OSX回归到OpenGL 2.1，因此您需要自己设置核心配置文件。

$ glxinfo | grep OpenGL
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: AMD Radeon R9 M370X OpenGL Engine
OpenGL version string: 2.1 ATI-1.42.15
OpenGL shading language version string: 1.20

我可以通过将GLCapabilities传递给GLCanvas构造函数来设置核心版本（OpenGL 4.1）。

这是新的固定构造函数：

public Code() {
    setTitle("Chapter 2 - program1");
    setSize(600, 400);
    setLocation(200, 200);

    // This was the fix
    GLProfile glp = GLProfile.getMaxProgrammableCore(true);
    GLCapabilities caps = new GLCapabilities(glp);
    myCanvas = new GLCanvas(caps);

    myCanvas.addGLEventListener(this);
    this.add(myCanvas);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
}

Answer 2

要在Mac上运行本书的示例，我已在此网站上发出说明：http://athena.ecs.csus.edu/~gordonvs/errataMac.html

总之，您需要：

确保您已安装最新的Java SE
将相关的JOGL库放入System / Library / Java / Extensions（需要的特定库列在上面的网站中）
添加Julien（谢谢！）
将着色器上的版本号更改为410（或Mac支持的任何内容）
在使用纹理的示例中，将着色器中的绑定布局限定符替换为Java应用程序中对glUniform1i（）的适当调用（与4.1版兼容）

如果发现了更多的特质，我会将它们添加到网站上的说明中。

卡支持OpenGL 4.1，但在线程上没有GL4实现？

2 个答案: