设置窗口的override_redirect属性为True，避免窗口干预

private static unsafe XShmInfo CreateXShmInfo(IntPtr display, nint visual, int width, int height, int mapLength)

{

const int ZPixmap = 2;

var xShmSegmentInfo = new XShmSegmentInfo();

var shmImage = (XImage*)XShmCreateImage(display, visual, 32, ZPixmap, IntPtr.Zero, &xShmSegmentInfo,

(uint)width, (uint)height);

Console.WriteLine(

$"XShmCreateImage = {(IntPtr)shmImage:X} xShmSegmentInfo={xShmSegmentInfo} PXShmCreateImage={new IntPtr(&xShmSegmentInfo):X}");

var shmgetResult = shmget(IPC_PRIVATE, mapLength, IPC_CREAT | 0777);

Console.WriteLine($"shmgetResult={shmgetResult:X}");

xShmSegmentInfo.shmid = shmgetResult;

var shmaddr = shmat(shmgetResult, IntPtr.Zero, 0);

Console.WriteLine($"shmaddr={shmaddr:X}");

xShmSegmentInfo.www.laipuhuo.com shmaddr = (char*)shmaddr.ToPointer();

shmImage->data = shmaddr;

XShmAttach(display, &xShmSegmentInfo);

XFlush(display);

return new XShmInfo(shmImage, shmaddr)

{

};

}

unsafe class XShmInfo

{

public www.laipuhuo.com XShmInfo(XImage* shmImage, IntPtr shmAddr)

{

ShmImage = shmImage;

ShmAddr = shmAddr;

}

public XImage* ShmImage { get; }

public IntPtr ShmAddr { get; }

}

public record RenderInfo

(

IntPtr Display,

IntPtr Visual,

int Width,

int Height,

int DataByteLength,

IntPtr Handle,

IntPtr GC

);

XInitThreads();

var display = XOpenDisplay(IntPtr.Zero);

var screen = XDefaultScreen(display);

var rootWindow = XDefaultRootWindow(display);

XMatchVisualInfo(www.laipuhuo.com display, screen, 32, 4, out var info);

var visual = info.visual;

var xDisplayWidth = XDisplayWidth(display, screen);

var xDisplayHeight = XDisplayHeight(display, screen);

var width = xDisplayWidth;

var height = xDisplayHeight;

var valueMask =

//SetWindowValuemask.BackPixmap

0

| SetWindowValuemask.BackPixel

| SetWindowValuemask.BorderPixel

| SetWindowValuemask.BitGravity

| SetWindowValuemask.WinGravity

| SetWindowValuemask.BackingStore

| SetWindowValuemask.ColorMap

//| SetWindowValuemask.OverrideRedirect

;

var xSetWindowAttributes = new XSetWindowAttributes

{

backing_store = 1,

bit_gravity = www.laipuhuo.com Gravity.NorthWestGravity,

win_gravity = Gravity.NorthWestGravity,

//override_redirect = true, // 设置窗口的override_redirect属性为True，以避免窗口管理器的干预

colormap = XCreateColormap(display, rootWindow, visual, 0),

border_pixel = 0,

background_pixel = 0,

};

var handle = XCreateWindow(display, rootWindow, 0, 0, width, height, 5,

32,

(int)CreateWindowArgs.InputOutput,

visual,

(nuint)valueMask, www.laipuhuo.com ref xSetWindowAttributes);

XEventMask ignoredMask = XEventMask.SubstructureRedirectMask | XEventMask.ResizeRedirectMask |

XEventMask.PointerMotionHintMask;

var mask = new IntPtr(0xffffff ^ (int)ignoredMask);

XSelectInput(display, handle, mask);

XMapWindow(display, handle);

XFlush(display);

var gc = www.laipuhuo.com XCreateGC(display, handle, 0, 0);

XFlush(display);