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# -*- coding: utf-8 -*-
from ctypes import (
POINTER,
Structure,
c_int,
c_long,
c_ubyte,
c_ulong,
cdll,
pointer,
util,
)
libx11pth = util.find_library("X11")
if not libx11pth:
raise ImportError("Couldn't find libX11")
try:
libx11 = cdll.LoadLibrary(libx11pth)
except OSError:
raise ImportError("Couldn't load libX11")
libxrandrpth = util.find_library("Xrandr")
if not libxrandrpth:
raise ImportError("Couldn't find libXrandr")
try:
libxrandr = cdll.LoadLibrary(libxrandrpth)
except OSError:
raise ImportError("Couldn't load libXrandr")
import os
import sys
from DisplayCAL.options import debug
XA_CARDINAL = 6
XA_INTEGER = 19
Atom = c_ulong
class Display(Structure):
__slots__ = []
_fields_ = [("_opaque_struct", c_int)]
try:
libx11.XInternAtom.restype = Atom
libx11.XOpenDisplay.restype = POINTER(Display)
libx11.XRootWindow.restype = c_ulong
libx11.XGetWindowProperty.restype = c_int
libx11.XGetWindowProperty.argtypes = [
POINTER(Display),
c_ulong,
Atom,
c_long,
c_long,
c_int,
c_ulong,
POINTER(c_ulong),
POINTER(c_int),
POINTER(c_ulong),
POINTER(c_ulong),
POINTER(POINTER(c_ubyte)),
]
except AttributeError as exception:
raise ImportError(f"libX11: {exception}")
try:
libxrandr.XRRGetOutputProperty.restype = c_int
libxrandr.XRRGetOutputProperty.argtypes = [
POINTER(Display),
c_ulong,
Atom,
c_long,
c_long,
c_int,
c_int,
c_ulong,
POINTER(c_ulong),
POINTER(c_int),
POINTER(c_ulong),
POINTER(c_ulong),
POINTER(POINTER(c_ubyte)),
]
except AttributeError as exception:
raise ImportError(f"libXrandr: {exception}")
class XDisplay:
def __init__(self, name=None):
self.name = name or os.getenv("DISPLAY")
def __enter__(self):
self.open()
return self
def __exit__(self, etype, value, tb):
self.close()
def open(self):
self.display = libx11.XOpenDisplay(self.name.encode())
if not self.display:
raise ValueError(f"Invalid X display {repr(self.name)}")
def close(self):
libx11.XCloseDisplay(self.display)
def intern_atom(self, atom_name):
atom_id = libx11.XInternAtom(self.display, atom_name, False)
if not atom_id:
raise ValueError(f"Invalid atom name {repr(atom_name)}")
return atom_id
def root_window(self, screen_no=0):
window = libx11.XRootWindow(self.display, screen_no)
if not window:
raise ValueError(f"Invalid X screen {repr(screen_no)}")
return window
def get_window_property(self, window, atom_id, atom_type=XA_CARDINAL):
ret_type, ret_format, ret_len, ret_togo, atomv = (
c_ulong(),
c_int(),
c_ulong(),
c_ulong(),
pointer(c_ubyte()),
)
property = None
if (
libx11.XGetWindowProperty(
self.display,
window,
atom_id,
0,
0x7FFFFFF,
False,
atom_type,
ret_type,
ret_format,
ret_len,
ret_togo,
atomv,
)
== 0
and ret_len.value > 0
):
if debug:
print("ret_type:", ret_type.value)
print("ret_format:", ret_format.value)
print("ret_len:", ret_len.value)
print("ret_togo:", ret_togo.value)
property = [atomv[i] for i in range(ret_len.value)]
return property
def get_output_property(self, output, atom_id, atom_type=XA_CARDINAL):
if not output:
raise ValueError(f"Invalid output {repr(output)} specified")
ret_type, ret_format, ret_len, ret_togo, atomv = (
c_ulong(),
c_int(),
c_ulong(),
c_ulong(),
pointer(c_ubyte()),
)
property = None
if (
libxrandr.XRRGetOutputProperty(
self.display,
output,
atom_id,
0,
0x7FFFFFF,
False,
False,
atom_type,
ret_type,
ret_format,
ret_len,
ret_togo,
atomv,
)
== 0
and ret_len.value > 0
):
if debug:
print("ret_type:", ret_type.value)
print("ret_format:", ret_format.value)
print("ret_len:", ret_len.value)
print("ret_togo:", ret_togo.value)
property = [atomv[i] for i in range(ret_len.value)]
return property
if __name__ == "__main__":
with XDisplay() as display:
property = display.get_output_property(
int(sys.argv[1]), sys.argv[2], int(sys.argv[3])
)
print("{} for display {}: {}".format(sys.argv[2], sys.argv[1], repr(property)))
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