功能：完善通用云管工作台、审计与诊断能力

docs/evidence/linux-gpu-20261111/double-cursor-check.py

@@ -0,0 +1,44 @@
+"""Run on the box with a focused, live Ubuntu stream and clear wallpaper."""
+import ctypes as C, json, subprocess, time, os
+os.environ.update(DISPLAY=':0',XAUTHORITY='/home/armbian/.Xauthority')
+import gi
+gi.require_version('Gdk','3.0')
+from gi.repository import Gdk
+x=C.CDLL('libX11.so.6'); f=C.CDLL('libXfixes.so.3')
+class Cursor(C.Structure):
+    _fields_=[('x',C.c_short),('y',C.c_short),('w',C.c_ushort),('h',C.c_ushort),
+              ('hx',C.c_ushort),('hy',C.c_ushort),('serial',C.c_ulong),
+              ('pixels',C.POINTER(C.c_ulong)),('atom',C.c_ulong),('name',C.c_char_p)]
+x.XOpenDisplay.argtypes=[C.c_char_p]; x.XOpenDisplay.restype=C.c_void_p
+x.XFree.argtypes=[C.c_void_p]; x.XCloseDisplay.argtypes=[C.c_void_p]
+f.XFixesGetCursorImage.argtypes=[C.c_void_p];f.XFixesGetCursorImage.restype=C.POINTER(Cursor)
+display=x.XOpenDisplay(None); assert display
+pid=int(subprocess.check_output(['pgrep','-x','moonlight']).strip())
+def focused():
+    assert int(subprocess.check_output(['xdotool','getwindowfocus','getwindowpid']).strip())==pid
+def move(px,py):
+    subprocess.run(['xdotool','mousemove',str(px),str(py)],check=True)
+    time.sleep(.5)
+def patch(px,py):
+    p=Gdk.pixbuf_get_from_window(Gdk.get_default_root_window(),px-8,py-8,64,64)
+    assert p and p.get_n_channels()==3
+    return bytes(p.get_pixels())
+results=[]
+try:
+    focused()
+    for px,py in [(900,900),(1300,900),(1800,900)]:
+        move(400,1100); before=patch(px,py)
+        move(px,py); after=patch(px,py)
+        diffs=[max(abs(a-b) for a,b in zip(before[i:i+3],after[i:i+3])) for i in range(0,len(before)-2,3)]
+        ptr=f.XFixesGetCursorImage(display); assert ptr
+        try:
+            c=ptr.contents
+            opaque=sum(((c.pixels[i]>>24)&255)>0 for i in range(c.w*c.h))
+            assert opaque>0 and (c.x,c.y)==(px,py)
+            results.append(dict(point=[px,py],video_pixels_changed_over_25=sum(v>25 for v in diffs),
+                                max_video_channel_difference=max(diffs),local_shape=[c.w,c.h,c.hx,c.hy],
+                                local_opaque_pixels=opaque))
+        finally:x.XFree(ptr)
+    focused()
+    print(json.dumps(dict(method='XGetImage-style root capture excludes local X11 cursor; compare clear wallpaper at identical coordinates',pid=pid,points=results)))
+finally:x.XCloseDisplay(display)