public static extern int XShmDetach(System.IntPtr display, ref XShmSegmentInfo shminfo);
public static extern unsafe XImage *XShmCreateImage(System.IntPtr display, Visual *visual, uint depth
, int format, System.IntPtr data, ref XShmSegmentInfo shminfo, uint width, uint height);
private static unsafe byte[] UnsafeX11ScreenshotWithCursor(bool withCursor)
{
byte[] result = null;
int AllPlanes = ~0;
System.UIntPtr AllPlanes2 = new System.UIntPtr((uint)AllPlanes);
System.IntPtr display = LibX11Functions.XOpenDisplay(System.IntPtr.Zero);
int defaultScreen = LibX11Functions.XDefaultScreen(display);
System.UIntPtr window = LibX11Functions.XRootWindow(display, defaultScreen);
XWindowAttributes xa = new XWindowAttributes();
LibX11Functions.XGetWindowAttributes(display, window, ref xa);
Screen *screen = xa.screen; // struct screen
XShmSegmentInfo shminfo = new XShmSegmentInfo();
XImage *ximg = LibXExt.XShmCreateImage(display, LibXExt.DefaultVisualOfScreen(screen)
, (uint)LibXExt.DefaultDepthOfScreen(screen), LinScreen.ZPixmap
, System.IntPtr.Zero, ref shminfo, (uint)xa.width, (uint)xa.height);
shminfo.shmid = LibC.shmget(LibC.IPC_PRIVATE, new System.IntPtr(ximg->bytes_per_line * ximg->height), LibC.IPC_CREAT | 0777);
ximg->data = (sbyte *)LibC.shmat(shminfo.shmid, System.IntPtr.Zero, 0);
shminfo.shmaddr = (System.IntPtr)ximg->data;
shminfo.readOnly = 0;
if (shminfo.shmid < 0)
{
System.Console.WriteLine("Fatal shminfo error!");
}
int s1 = LibXExt.XShmAttach(display, ref shminfo);
// System.Console.WriteLine("XShmAttach() {0}\n", s1 != 0 ? "success!" : "failure!");
int res = LibXExt.XShmGetImage(display, window, ximg, 0, 0, AllPlanes2);
// const char *filename = "/tmp/test.bmp";
// WriteBitmapToFile(filename, (int) ximg->bits_per_pixel, (int)window_attributes.width, (int)window_attributes.height, (const void*) ximg->data);
int bytesPerPixel = (ximg->bits_per_pixel + 7) / 8;
int stride = 4 * ((ximg->width * bytesPerPixel + 3) / 4);
// long size = ximg->height * stride;
// byte[] managedArray = new byte[size];
// Marshal.Copy((IntPtr)(ximg->data), managedArray, 0, (int)size);
// System.Console.WriteLine(managedArray);
if (withCursor)
{
PaintMousePointer(display, ximg);
} // End if (withCursor)
using (System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(ximg->width, ximg->height, stride, System.Drawing.Imaging.PixelFormat.Format24bppRgb, (System.IntPtr)ximg->data))
{
// bmp.Save("/tmp/shtest.bmp");
#if false
// ZERO compression at all !
// using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
// {
// bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
// result = ms.ToArray();
// } // End Using ms
#else
result = CompressImage(bmp, 25);
#endif
} // End Using bmp
LibX11Functions.XDestroyImage2(ximg);
LibXExt.XShmDetach(display, ref shminfo);
LibC.shmdt(shminfo.shmaddr);
LibX11Functions.XCloseDisplay(display);
return(result);
} // End Function UnsafeX11ScreenshotWithCursor
