When starting Lwjgl I got
Exception in thread "main" java.lang.IllegalStateException: There is no OpenGL context current in the current thread.at
org.lwjgl.opengl.GL.createCapabilities(GL.java:363)
at org.lwjgl.opengl.GL.createCapabilities(GL.java:312)
at rr.industries.OpenGLTest.<init>(OpenGLTest.java:42)
at rr.industries.OpenGLTest.main(OpenGLTest.java:97)
When looking for answers for this everything said to either use GLContext.createFromCurrent(), which no longer exists in Lwjgl 3.1.2, or to add GL.createCapabilities() to your code, which was the command that was creating this error. I enabled debug mode on Lwjgl and I got this error:
[LWJGL] An OpenGL context was in an error state before the creation of its capabilities instance. Error: 0x502
I tried restarting my IDE and my computer. What can I do to troubleshoot / fix this.
EDIT:
After doing some trouble shooting this is not the root of the problem. If I completely avoid starting Lwjgl and don't call GL.createCapabilities() I get this error:
Exception in thread "main" java.lang.RuntimeException: Failed to create the GLFW window
at rr.industries.OpenGLTest.<init>(OpenGLTest.java:49)
at rr.industries.OpenGLTest.main(OpenGLTest.java:102)
at this point I have no idea what is wrong. I checked that my drivers were updated and GL Viewer says my gpu supports OpenGL 3.0 - 4.4. Here is the code I am using (mostly copied from Lwjgl Getting Started page)
public class OpenGLTest {
private long window;
public static Logger LOG = LoggerFactory.getLogger(OpenGLTest.class);
public OpenGLTest(){
// 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
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GLFW_TRUE);
// Create the window
window = glfwCreateWindow(300, 300, "Hello World!", NULL, NULL);
if ( window == NULL )
throw new RuntimeException("Failed to create the GLFW window"); //Stacktrace points to THIS line
// 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
});
}
public void start(){
// This line is critical for LWJGL's interoperation with GLFW's
// OpenGL context, or any context that is managed externally.
// LWJGL detects the context that is current in the current thread,
// creates the GLCapabilities instance and makes the OpenGL
// bindings available for use.
GL.createCapabilities();
// Set the clear color
glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
// Run the rendering loop until the user has attempted to close
// the window or has pressed the ESCAPE key.
loop();
finish();
}
public void finish(){
// Free the window callbacks and destroy the window
glfwFreeCallbacks(window);
glfwDestroyWindow(window);
// Terminate GLFW and free the error callback
glfwTerminate();
glfwSetErrorCallback(null).free();
}
public void loop(){
while ( !glfwWindowShouldClose(window) ) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear the framebuffer
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){
Configuration.DEBUG.set(true);
GLFWErrorCallback.createPrint(System.out);
LOG.info("Starting Lwjgl v{}", Version.version());
new OpenGLTest()/*.start()*/;
}
}
start(), loop(), and finish() are never called trying to find the root of the problem. When I run the above code I always get the RuntimeException posted earlier. Any ideas on how to fix it?
