英文:
Context error when using glCreateShader in LWJGL
问题
在尝试创建着色器时，它会抛出致命错误。
以下是代码部分：
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
handle = glfwCreateWindow(800, 600, "Omlet", 0, 0);
if (handle == 0) {
System.out.println("无法创建GLFW窗口");
glfwTerminate();
System.exit(-1);
}
glfwMakeContextCurrent(handle);
glfwSetFramebufferSizeCallback(handle, (win, w, h) -> glViewport(0, 0, w, h));
glCreateShader(GL_VERTEX_SHADER);
以下是错误信息：
本机方法中的致命错误: 线程[主,5,主]: 当前没有上下文，或者调用了当前上下文中不可用的函数。JVM 将中止执行。
at org.lwjgl.opengl.GL20C.glCreateShader(Native Method)
at net.zyrafal.Main.main(Main.java:25)
我正在使用 org.lwjgl.opengl.GL46C 和 org.lwjgl.glfw.GLFW。
英文:
It throws a FATAL ERROR when i try to create a shader.
Here is the code
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
handle = glfwCreateWindow(800, 600, "Omlet", 0, 0);
if (handle == 0) {
System.out.println("Failed to create GLFW window");
glfwTerminate();
System.exit(-1);
}
glfwMakeContextCurrent(handle);
glfwSetFramebufferSizeCallback(handle, (win, w, h) -> glViewport(0, 0, w, h));
glCreateShader(GL_VERTEX_SHADER);
And here is the error:
FATAL ERROR in native method: Thread[main,5,main]: No context is current or a function that is not available in the current context was called. The JVM will abort execution.
at org.lwjgl.opengl.GL20C.glCreateShader(Native Method)
at net.zyrafal.Main.main(Main.java:25)
I am using org.lwjgl.opengl.GL46C and org.lwjgl.glfw.GLFW
答案1
得分: 0
你遗漏了调用GL.createCapabilities()函数。这在LWJGL中是必要的，以便从线程本地上下文中获取OpenGL函数的函数指针。请参阅以下代码和解释性注释，网址为：https://www.lwjgl.org/guide :
// 这行代码对于LWJGL与GLFW的OpenGL上下文之间的交互，或者任何外部管理的上下文都是关键的。
// LWJGL会检测当前线程中的上下文，创建GLCapabilities实例，并使OpenGL绑定可供使用。
GL.createCapabilities();
英文:
You are missing the call to GL.createCapabilities(). It is needed for LWJGL to obtain the function pointers for OpenGL functions from a thread-local context.
Please see the code and explaining comments on https://www.lwjgl.org/guide :
// 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();
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