x11 不匹配错误 X_CreateWindow 序列号 7

如何解决x11 不匹配错误 X_CreateWindow 序列号 7

我正在编写一个带有事件输出的基本 X 应用程序。我在运行程序时遇到 Badmatch 错误。据我所知，代码是正确的，但我不知道为什么我收到错误，并且没有太多关于此的文档。这是我的 createWindow 函数：

void appevent::createWindow() {

    XPixmapformatValues *pixmapformats;
    int count;
    const int bitsPerByte {8};

    dpy = XOpendisplay(NULL);

    pixmapformats = XListPixmapformats(dpy,&count);

    for (int i {} ; i < count ; i++) {

        if(pixmapformats[i].depth > depth) {

            depth = pixmapformats[i].depth;
            bytespp = pixmapformats[i].bits_per_pixel / bitsPerByte;
            scanlinePad = pixmapformats[i].scanline_pad;
        }
    }

    XFree(pixmapformats);

    std::cout << "Max depth of display: " << depth << std::endl;
    std::cout << "Bytes per pixel: " << bytespp << std::endl;

    vis = DefaultVisual(dpy,0);

    switch(vis->c_class) {

        case PseudoColor: std::cout << "Vis is pseudocolor" << std::endl; break;
        case StaticColor: std::cout << "Vis is StaticColor" << std::endl; break;
        case GrayScale  : std::cout << "Vis is GrayScale"   << std::endl; break;
        case StaticGray : std::cout << "Vis is StaticGray"  << std::endl; break;
        case DirectColor: std::cout << "Vis is DirectColor" << std::endl; break;
        case TrueColor  : std::cout << "Vis is TrueColor"   << std::endl; break;
    }

    w = XCreateWindow(dpy,DefaultRootwindow(dpy),100,screenWidth,screenHeight,depth,copyFromParent,vis,NULL);

    XStoreName(dpy,w,"Hello");
    XMapWindow(dpy,w);

    screen = new char[screenWidth * screenHeight * bytespp];

    if(ImageByteOrder(dpy) == LSBFirst) std::cout << "LSB first" << std::endl;
    else std::cout << "MSB first" << std::endl;

    ximg = XCreateImage(dpy,Zpixmap,screen,scanlinePad,0);

    XSetForeground(dpy,DefaultGC(dpy,0),-0);
    XSetBackground(dpy,0);
}

以下是输出和错误信息：

Max depth of display: 32
Bytes per pixel: 4
Vis is TrueColor
LSB first
X Error of Failed request:  BadMatch (invalid parameter attributes)
  Major opcode of Failed request:  1 (X_CreateWindow)
  Serial number of Failed request:  7
  Current serial number in output stream:  10

我在 X 方面没有太多经验。这里有什么错误？