Java LWJGL glfwGetMonitorPhysicalSize 和 glfwGetVideoMode 未返回预期值

Question

我目前正在尝试创建一个基本的监视器实用程序类，用于在监视器上获取和打印信息。我在 java 中使用 LWJGL 为此。当我调用函数 glfwGetMonitorPhysicalSize 时，x 和 y 总是返回 0。而glfwGetVideoMode函数只返回“- '”。我找不到我在这里做错了什么!

而且，每次运行程序时，monitorID 似乎都不同。这正常吗？

请注意，此代码只是一个测试片段:

private static GLFWErrorCallback errorCallback = Callbacks.errorCallbackPrint(System.out);
private static PointerBuffer monitors = null;

public static long getPrimaryMonitor(){
    glfwSetErrorCallback(errorCallback);

    if(glfwInit() == GL_FALSE)
        System.out.println("error");

    monitors = glfwGetMonitors();
    long monitorId = monitors.get(0);

    // Monitor name
    System.out.println(glfwGetMonitorName(monitorId));

    // Monitor physical size
    IntBuffer xSize = IntBuffer.allocate(4);
    IntBuffer ySize = IntBuffer.allocate(4);
    glfwGetMonitorPhysicalSize(monitorId, xSize, ySize);

    System.out.print("Pos X: ");
    while(xSize.hasRemaining())
        System.out.print(xSize.get());
    System.out.println();

    System.out.print("Pos Y: ");
    while(ySize.hasRemaining())
        System.out.print(ySize.get());
    System.out.println();

    // Monitor video mode
    ByteBuffer videoMode = glfwGetVideoMode(monitorId);

    System.out.print("Video mode: ");
    while(videoMode.hasRemaining())
        System.out.print(videoMode.getChar());
    System.out.println();

    return monitorId;
}

Answer 1

我找到了解决办法!这些函数实际上返回了有效值，但显然我以错误的方式读取它们!

视频模式的正确使用方法:

ByteBuffer vidmode = glfwGetVideoMode(monitorId);

System.out.println("Video mode width: " + GLFWvidmode.width(vidmode));
System.out.println("Video mode height: " + GLFWvidmode.height(vidmode));