/usr/lib/python3/dist-packages/checkbox_support/contrib/xrandr.py is in python3-checkbox-support 0.22-1.
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The actual contents of the file can be viewed below.
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# -*- coding: utf-8 -*-
#
# Python-XRandR provides a high level API for the XRandR extension of the
# X.org server. XRandR allows to configure resolution, refresh rate, rotation
# of the screen and multiple outputs of graphics cards.
#
# Copyright 2014 © Canonical Ltd.
# Copyright 2007 © Sebastian Heinlein <sebastian.heinlein@web.de>
# Copyright 2007 © Michael Vogt <mvo@ubuntu.com>
# Copyright 2007 © Canonical Ltd.
#
# In many aspects it follows the design of the xrand tool of the X.org, which
# comes with the following copyright:
#
# Copyright © 2001 Keith Packard, member of The XFree86 Project, Inc.
# Copyright © 2002 Hewlett Packard Company, Inc.
# Copyright © 2006 Intel Corporation
#
# And can be downloaded here:
#
# git://anongit.freedesktop.org/git/xorg/app/xrandr
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
from ctypes import (
POINTER,
Structure,
byref,
c_char_p,
c_void_p,
c_int,
c_long,
c_ulong,
c_ushort,
cdll,
)
import os
RR_ROTATE_0 = 1
RR_ROTATE_90 = 2
RR_ROTATE_180 = 4
RR_ROTATE_270 = 8
RR_REFLECT_X = 16
RR_REFLECT_Y = 32
RR_CONNECTED = 0
RR_DISCONNECTED = 1
RR_UNKOWN_CONNECTION = 2
RR_BAD_OUTPUT = 0
RR_BAD_CRTC = 1
RR_BAD_MODE = 2
RR_SET_CONFIG_SUCCESS = 0
RR_SET_CONFIG_INVALID_CONFIG_TIME = 1
RR_SET_CONFIG_INVALID_TIME = 2
RR_SET_CONFIG_FAILED = 3
# Flags to keep track of changes
CHANGES_NONE = 0
CHANGES_CRTC = 1
CHANGES_MODE = 2
CHANGES_RELATION = 4
CHANGES_POSITION = 8
CHANGES_ROTATION = 16
CHANGES_REFLECTION = 32
CHANGES_AUTOMATIC = 64
CHANGES_REFRESH = 128
CHANGES_PROPERTY = 256
# Relation information
RELATION_ABOVE = 0
RELATION_BELOW = 1
RELATION_RIGHT_OF = 2
RELATION_LEFT_OF = 3
RELATION_SAME_AS = 4
# some fundamental datatypes
RRCrtc = c_long
RROutput = c_long
RRMode = c_long
Connection = c_ushort
SubpixelOrder = c_ushort
Time = c_ulong
Rotation = c_ushort
Status = c_int
# load the libs
xlib = cdll.LoadLibrary('libX11.so.6')
rr = cdll.LoadLibrary('libXrandr.so.2')
# query resources
class _XRRModeInfo(Structure):
_fields_ = [
("id", RRMode), # XID is c_long
("width", c_int),
("height", c_int),
("dotClock", c_long),
("hSyncStart", c_int),
("hSyncEnd", c_int),
("hTotal", c_int),
("hSkew", c_int),
("vSyncStart", c_int),
("vSyncEnd", c_int),
("vTotal", c_int),
("name", c_char_p),
("nameLength", c_int),
("modeFlags", c_long),
]
class _XRRScreenSize(Structure):
_fields_ = [
("width", c_int),
("height", c_int),
("mwidth", c_int),
("mheight", c_int)
]
class _XRRCrtcInfo(Structure):
_fields_ = [
("timestamp", Time),
("x", c_int),
("y", c_int),
("width", c_int),
("height", c_int),
("mode", RRMode),
("rotation", c_int),
("noutput", c_int),
("outputs", POINTER(RROutput)),
("rotations", Rotation),
("npossible", c_int),
("possible", POINTER(RROutput)),
]
class _XRRScreenResources(Structure):
_fields_ = [
("timestamp", Time),
("configTimestamp", Time),
("ncrtc", c_int),
("crtcs", POINTER(RRCrtc)),
("noutput", c_int),
("outputs", POINTER(RROutput)),
("nmode", c_int),
("modes", POINTER(_XRRModeInfo)),
]
class RRError(Exception):
"""Base exception class of the module"""
pass
class UnsupportedRRError(RRError):
"""Raised if the required XRandR extension version is not available"""
def __init__(self, required, current):
self.required = required
self.current = current
# XRRGetOutputInfo
class _XRROutputInfo(Structure):
_fields_ = [
("timestamp", Time),
("crtc", c_int),
("name", c_char_p),
("nameLen", c_int),
("mm_width", c_ulong),
("mm_height", c_ulong),
("connection", Connection),
("subpixel_order", SubpixelOrder),
("ncrtc", c_int),
("crtcs", POINTER(RRCrtc)),
("nclone", c_int),
("clones", POINTER(RROutput)),
("nmode", c_int),
("npreferred", c_int),
("modes", POINTER(RRMode))
]
class _XRRCrtcGamma(Structure):
_fields_ = [
('size', c_int),
('red', POINTER(c_ushort)),
('green', POINTER(c_ushort)),
('blue', POINTER(c_ushort)),
]
def _array_conv(array, type, conv=lambda x: x):
length = len(array)
res = (type * length)()
for i in range(length):
res[i] = conv(array[i])
return res
class Output(object):
"""The output is a reference to a supported output jacket of the graphics
card. Outputs are attached to a hardware pipe to be used. Furthermore
they can be a clone of another output or show a subset of the screen"""
def __init__(self, info, id, screen):
"""Initializes an output instance"""
self._info = info
self.id = id
self._screen = screen
# Store changes later here
self._mode = None
self._crtc = None
self._rotation = RR_ROTATE_0
self._relation = None
self._relation_offset = 0
self._relative_to = None
self._position = None
self._reflection = None
self._automatic = None
self._rate = None
self._changes = CHANGES_NONE
self._x = 0
self._y = 0
self.name = self._info.contents.name
def __del__(self):
"""Frees the internal reference to the output info if the output gets
removed"""
rr.XRRFreeOutputInfo(self._info)
def get_physical_width(self):
"""Returns the display width reported by the connected output device"""
return self._info.contents.mm_width
def get_physical_height(self):
"""
Returns the display height reported by the connected output device
"""
return self._info.contents.mm_height
def get_crtc(self):
"""Returns the xid of the hardware pipe to which the output is
attached. If the output is disabled it will return 0"""
return self._info.contents.crtc
def get_crtcs(self):
"""Returns the xids of the hardware pipes to which the output could
be attached"""
crtcs = []
for i in range(self._info.contents.ncrtc):
for crtc in self._screen.crtcs:
if crtc.xid == self._info.contents.crtcs[i]:
crtcs.append(crtc)
return crtcs
def get_available_rotations(self):
"""Returns a binary flag of the supported rotations of the output or
0 if the output is disabled"""
rotations = RR_ROTATE_0
found = False
if self.is_active():
# Get the rotations supported by all crtcs to make assigning
# crtcs easier. Furthermore there don't seem to be so many
# cards which show another behavior
for crtc in self.get_crtcs():
# Set rotations to the value of the first found crtc and
# then create a subset only for all other crtcs
if not found:
rotations = crtc.get_available_rotations()
found = True
else:
rotations = rotations & crtc.get_available_rotations()
return rotations
def get_available_modes(self):
"""Returns the list of supported mode lines (resolution, refresh rate)
that are supported by the connected device"""
modes = []
for m in range(self._info.contents.nmode):
output_modes = self._info.contents.modes
for s in range(self._screen._resources.contents.nmode):
screen_modes = self._screen._resources.contents.modes
if screen_modes[s].id == output_modes[m]:
modes.append(screen_modes[s])
return modes
def get_preferred_mode(self):
"""Returns an index that refers to the list of available modes and
points to the preferred mode of the connected device"""
return self._info.contents.npreferred
def is_active(self):
"""Returns True if the output is attached to a hardware pipe, is
enabled"""
return self._info.contents.crtc != 0
def is_connected(self):
"""Return True if a device is detected at the output"""
if self._info.contents.connection in (RR_CONNECTED,
RR_UNKOWN_CONNECTION):
return True
return False
def disable(self):
"""Disables the output"""
if not self.is_active():
return
self._mode = None
self._crtc._outputs.remove(self)
self._crtc = None
self._changes = self._changes | CHANGES_CRTC | CHANGES_MODE
def set_to_mode(self, mode):
modes = self.get_available_modes()
if mode in range(len(modes)):
self._mode = modes[mode].id
return
raise RRError("Mode is not available")
def set_to_preferred_mode(self):
modes = self.get_available_modes()
mode = modes[self.get_preferred_mode()]
if mode is not None:
self._mode = mode.id
return
raise RRError("Preferred mode is not available")
def get_clones(self):
"""Returns the xids of the outputs which can be clones of the output"""
clones = []
for i in range(self._info.contents.nclone):
id = self._info.contents.clones[i]
o = self._screen.get_output_by_id(id)
clones.append(o)
return clones
def set_relation(self, relative, relation, offset=0):
"""Sets the position of the output in relation to the given one"""
rel = self._screen.get_output_by_name(relative)
if rel and relation in (RELATION_LEFT_OF, RELATION_RIGHT_OF,
RELATION_ABOVE, RELATION_BELOW,
RELATION_SAME_AS):
self._relation = relation
self._relative_to = rel
self._relation_offset = offset
self._changes = self._changes | CHANGES_RELATION
else:
raise RRError("The given relative output or relation is not "
"available")
def has_changed(self, changes=None):
"""Checks if the output has changed: Either for a specific change or
generally"""
if changes:
return self._changes & changes
else:
return self._changes != CHANGES_NONE
class Crtc(object):
"""The crtc is a reference to a hardware pipe that is provided by the
graphics device. Outputs can be attached to crtcs"""
def __init__(self, info, xid, screen):
"""Initializes the hardware pipe object"""
self._info = info
self.xid = xid
self._screen = screen
self._outputs = []
def __del__(self):
"""Frees the reference to the rendering pipe if the instance gets
removed"""
rr.XRRFreeCrtcInfo(self._info)
def get_xid(self):
"""Returns the internal id of the crtc from the X server"""
return self.xid
def get_available_rotations(self):
"""Returns a binary flag that contains the supported rotations of the
hardware pipe"""
return self._info.contents.rotations
def set_config(self, x, y, mode, outputs, rotation=RR_ROTATE_0):
"""Configures the render pipe with the given mode and outputs. X and y
set the position of the crtc output in the screen"""
rr.XRRSetCrtcConfig(self._screen._display,
self._screen._resources,
self.xid,
self._screen.get_timestamp(),
c_int(x), c_int(y),
mode,
rotation,
_array_conv(outputs, RROutput, lambda x: x.id),
len(outputs))
def apply_changes(self):
"""Applies the stored changes"""
if len(self._outputs) > 0:
output = self._outputs[0]
self.set_config(output._x, output._y, output._mode,
self._outputs, output._rotation)
else:
self.disable()
def disable(self):
"""Turns off all outputs on the crtc"""
rr.XRRSetCrtcConfig(self._screen._display,
self._screen._resources,
self.xid,
self._screen.get_timestamp(),
0, 0,
None,
RR_ROTATE_0,
0, 0)
#FIXME: support gamma settings
"""
def get_gamma_size(self):
return rr.XRRGetCrtcGammaSize(self._screen._display, self.id)
def get_gamma(self):
result = rr.XRRGetCrtcGamma(self._screen._display, self.id)
return _from_gamma(result)
def set_gamma(self, gamma):
g = _to_gamma(gamma)
rr.XRRSetCrtcGamma(self._screen._display, self.id, g)
rr.XRRFreeGamma(g)
gamma = property(get_gamma, set_gamma)"""
def load_outputs(self):
"""Get the currently assigned outputs"""
outputs = []
for i in range(self._info.contents.noutput):
id = self._info.contents.outputs[i]
o = self._screen.get_output_by_id(id)
outputs.append(o)
self._outputs = outputs
def get_outputs(self):
"""Returns the list of attached outputs"""
return self._outputs
def add_output(self, output):
"""Adds the specified output to the crtc"""
output._crtc = self
self._outputs.append(output)
def supports_output(self, output):
"""Check if the output can be used by the crtc.
See check_crtc_for_output in xrandr.c"""
if not self.xid in [c.xid for c in output.get_crtcs()]:
return False
if len(self._outputs):
for other in self._outputs:
if other == output:
continue
if other._x != output._x:
return False
if other._y != output._y:
return False
if other._mode != output._mode:
return False
if other._rotation != output._rotation:
return False
#FIXME: pick_crtc is still missing
elif self._info.contents.noutput > 0:
if self._info.contents.x != output._x:
return False
if self._info.contents.y != output._y:
return False
if self._info.contents.mode_info != output._mode:
return False
if self._info.rotation != output._rotation:
return False
return True
def supports_rotation(self, rotation):
"""Check if the given rotation is supported by the crtc"""
rotations = self._info.contents.rotations
dir = rotation & (RR_ROTATE_0 | RR_ROTATE_90 | RR_ROTATE_180 |
RR_ROTATE_270)
reflect = rotation & (RR_REFLECT_X | RR_REFLECT_Y)
if (((rotations & dir) != 0) and ((rotations & reflect) == reflect)):
return True
return False
def has_changed(self):
"""Check if there are any new outputs assigned to the crtc or any
outputs with a changed mode or position"""
if len(self._outputs) != self._info.contents.noutput:
return True
for i in range(self._info.contents.noutput):
id = self._info.contents.outputs[i]
output = self._screen.get_output_by_id(id)
if not output in self._outputs:
return True
if output.has_changed():
return True
return False
class Screen(object):
def __init__(self, dpy, screen=-1):
"""Initializes the screen"""
# Some sane default values
self.outputs = {}
self.crtcs = []
self._width = 0
self._height = 0
self._width_max = 0
self._height_max = 0
self._width_min = 0
self._height_min = 0
self._width_mm = 0
self._height_mm = 0
self._display = dpy
if not -1 <= screen < xlib.XScreenCount(dpy):
raise RRError("The chosen screen is not available", screen)
elif screen == -1:
self._screen = xlib.XDefaultScreen(dpy)
else:
self._screen = screen
self._root = xlib.XDefaultRootWindow(self._display, self._screen)
self._id = rr.XRRRootToScreen(self._display, self._root)
self._load_resources()
self._load_config()
(self._width, self._height,
self._width_mm, self._height_mm) = self.get_size()
if XRANDR_VERSION >= (1, 2):
self._load_screen_size_range()
self._load_crtcs()
self._load_outputs()
# Store XRandR 1.0 changes here
self._rate = self.get_current_rate()
self._rotation = self.get_current_rotation()
self._size_index = self.get_current_size_index()
def __del__(self):
"""Free the reference to the interal screen config if the screen
gets removed"""
rr.XRRFreeScreenConfigInfo(self._config)
def _load_config(self):
"""Loads the screen configuration. Only needed privately by the
the bindings"""
class XRRScreenConfiguration(Structure):
" private to Xrandr "
pass
gsi = rr.XRRGetScreenInfo
gsi.restype = POINTER(XRRScreenConfiguration)
self._config = gsi(self._display, self._root)
def _load_screen_size_range(self):
"""Detects the dimensionios of the screen"""
minWidth = c_int()
minHeight = c_int()
maxWidth = c_int()
maxHeight = c_int()
res = rr.XRRGetScreenSizeRange(self._display, self._root,
byref(minWidth), byref(minHeight),
byref(maxWidth), byref(maxHeight))
if res:
self._width_max = maxWidth.value
self._width_min = minWidth.value
self._height_max = maxHeight.value
self._height_min = minHeight.value
def _load_resources(self):
"""Loads the screen resources. Only needed privately for the
bindings"""
gsr = rr.XRRGetScreenResources
gsr.restype = POINTER(_XRRScreenResources)
self._resources = gsr(self._display, self._root)
def _load_crtcs(self):
"""Loads the available XRandR 1.2 crtcs (hardware pipes) of
the screen"""
gci = rr.XRRGetCrtcInfo
gci.restype = POINTER(_XRRCrtcInfo)
c = self._resources.contents.crtcs
for i in range(self._resources.contents.ncrtc):
xrrcrtcinfo = gci(self._display, self._resources, c[i])
self.crtcs.append(Crtc(xrrcrtcinfo, c[i], self))
def _load_outputs(self):
"""Loads the available XRandR 1.2 outputs of the screen"""
goi = rr.XRRGetOutputInfo
goi.restype = POINTER(_XRROutputInfo)
o = self._resources.contents.outputs
for i in range(self._resources.contents.noutput):
xrroutputinfo = goi(self._display, self._resources, o[i])
output = Output(xrroutputinfo, o[i], self)
self.outputs[xrroutputinfo.contents.name] = output
# Store the mode of the crtc in the output instance
crtc = self.get_crtc_by_xid(output.get_crtc())
if crtc:
output._mode = crtc._info.contents.mode
crtc.add_output(output)
def get_size(self):
"""Returns the current pixel and physical size of the screen"""
width = xlib.XDisplayWidth(self._display, self._screen)
width_mm = xlib.XDisplayWidthMM(self._display, self._screen)
height = xlib.XDisplayHeight(self._display, self._screen)
height_mm = xlib.XDisplayHeightMM(self._display, self._screen)
return width, height, width_mm, height_mm
def get_timestamp(self):
"""Creates a X timestamp that must be used when applying changes, since
they can be delayed"""
config_timestamp = Time()
rr.XRRTimes.restpye = c_ulong
return rr.XRRTimes(self._display, self._id, byref(config_timestamp))
def get_crtc_by_xid(self, xid):
"""Returns the crtc with the given xid or None"""
for crtc in self.crtcs:
if crtc.xid == xid:
return crtc
return None
def get_current_rate(self):
"""Returns the currently used refresh rate"""
_check_required_version((1, 0))
xccr = rr.XRRConfigCurrentRate
xccr.restype = c_int
return xccr(self._config)
def get_available_rates_for_size_index(self, size_index):
"""Returns the refresh rates that are supported by the screen for
the given resolution. See get_available_sizes for the resolution to
which size_index points"""
_check_required_version((1, 0))
rates = []
nrates = c_int()
rr.XRRConfigRates.restype = POINTER(c_ushort)
_rates = rr.XRRConfigRates(self._config, size_index, byref(nrates))
for r in range(nrates.value):
rates.append(_rates[r])
return rates
def get_current_rotation(self):
"""Returns the currently used rotation. Can be RR_ROTATE_0,
RR_ROTATE_90, RR_ROTATE_180 or RR_ROTATE_270"""
_check_required_version((1, 0))
current = c_ushort()
rr.XRRConfigRotations(self._config, byref(current))
return current.value
def get_available_rotations(self):
"""Returns a binary flag that holds the available resolutions"""
_check_required_version((1, 0))
current = c_ushort()
rotations = rr.XRRConfigRotations(self._config, byref(current))
return rotations
def get_current_size_index(self):
"""Returns the position of the currently used resolution size in the
list of available resolutions. See get_available_sizes"""
_check_required_version((1, 0))
rotation = c_ushort()
size = rr.XRRConfigCurrentConfiguration(self._config,
byref(rotation))
return size
def get_available_sizes(self):
"""Returns the available resolution sizes of the screen. The size
index points to the corresponding resolution of this list"""
_check_required_version((1, 0))
sizes = []
nsizes = c_int()
xcs = rr.XRRConfigSizes
xcs.restype = POINTER(_XRRScreenSize)
_sizes = xcs(self._config, byref(nsizes))
for r in range(nsizes.value):
sizes.append(_sizes[r])
return sizes
def set_config(self, size_index, rate, rotation):
"""Configures the screen with the given resolution at the given size
index, rotation and refresh rate. To get in effect call
Screen.apply_config()"""
_check_required_version((1, 0))
self.set_size_index(size_index)
self.set_refresh_rate(rate)
self.set_rotation(rotation)
def set_size_index(self, index):
"""Sets the reoslution of the screen. To get in effect call
Screen.apply_config()"""
if index in range(len(self.get_available_sizes())):
self._size_index = index
else:
raise RRError("There isn't any size associated "
"to the index {}".format(index))
def set_rotation(self, rotation):
"""Sets the rotation of the screen. To get in effect call
Screen.apply_config()"""
if self.get_available_rotations() & rotation:
self._rotation = rotation
else:
raise RRError("The chosen rotation is not supported")
def set_refresh_rate(self, rate):
"""Sets the refresh rate of the screen. To get in effect call
Screen.apply_config()"""
if rate in self.get_available_rates_for_size_index(self._size_index):
self._rate = rate
else:
raise RRError(
"The chosen refresh rate {0} is not supported".format(rate))
def get_mode_by_xid(self, xid):
"""Returns the mode of the given xid"""
screen_modes = self._resources.contents.modes
for s in range(self._resources.contents.nmode):
if screen_modes[s].id == xid:
return screen_modes[s]
return None
def get_output_by_name(self, name):
"""Returns the output of the screen with the given name or None"""
if name in self.outputs:
return self.outputs[name]
else:
return None
def get_output_by_id(self, id):
"""Returns the output of the screen with the given xid or None"""
for o in list(self.outputs.values()):
if o.id == id:
return o
return None
def print_info(self, verbose=False):
"""Prints some information about the detected screen and its outputs"""
_check_required_version((1, 0))
print((
"Screen {0}: minimum {1} x {2}, current {3} x {4},"
" maximum {5} x {6}"
).format(self._screen, self._width_min, self._height_min, self._width,
self._height, self._width_max, self._height_max))
print(" {0}mm x {0}mm".format(self._width_mm,
self._height_mm))
print("Crtcs: {0}".format(len(self.crtcs)))
if verbose:
print("Modes ({0}):".format(self._resources.contents.nmode))
modes = self._resources.contents.modes
for i in range(self._resources.contents.nmode):
print(" {0} - {1}x{2}".format(
modes[i].name, modes[i].width, modes[i].height))
i = 0
print("Sizes @ Refresh Rates:")
for s in self.get_available_sizes():
print(" [{0}] {1} x {2} @ {3}".format(
i, s.width, s.height,
self.get_available_rates_for_size_index(i)))
i += 1
print("Rotations:")
rots = self.get_available_rotations()
if rots & RR_ROTATE_0:
print("normal")
if rots & RR_ROTATE_90:
print("right")
if rots & RR_ROTATE_180:
print("inverted")
if rots & RR_ROTATE_270:
print("left")
print("")
print("Outputs:")
for o in list(self.outputs.keys()):
output = self.outputs[o]
print(" %s" % o)
if output.is_connected():
print("(%smm x %smm)" % (output.get_physical_width(),
output.get_physical_height()))
modes = output.get_available_modes()
print(" Modes:")
for m in range(len(modes)):
mode = modes[m]
refresh = mode.dotClock / (mode.hTotal * mode.vTotal)
print(" [%s] %s x %s @ %s" % (m,
mode.width,
mode.height,
refresh))
if mode.id == output._mode:
print("*")
if m == output.get_preferred_mode():
print("(preferred)")
print("")
print(" Rotations:")
rots = output.get_available_rotations()
if rots & RR_ROTATE_0:
print("normal")
if rots & RR_ROTATE_90:
print("right")
if rots & RR_ROTATE_180:
print("inverted")
if rots & RR_ROTATE_270:
print("left")
print("")
else:
print("(not connected)")
if verbose:
print(" Core properties:")
for (f, t) in output._info.contents._fields_:
print(" %s: %s" % (
f, getattr(output._info.contents, f)))
def get_outputs(self):
"""Returns the outputs of the screen"""
_check_required_version((1, 2))
return list(self.outputs.values())
def get_output_names(self):
_check_required_version((1, 2))
return list(self.outputs.keys())
def set_size(self, width, height, width_mm, height_mm):
"""Apply the given pixel and physical size to the screen"""
_check_required_version((1, 2))
# Check if we really need to apply the changes
if (width, height, width_mm, height_mm) == self.get_size():
return
rr.XRRSetScreenSize(self._display, self._root,
c_int(width), c_int(height),
c_int(width_mm), c_int(height_mm))
def apply_output_config(self):
"""Used for instantly applying RandR 1.2 changes"""
_check_required_version((1, 2))
self._arrange_outputs()
self._calculate_size()
self.set_size(self._width, self._height,
self._width_mm, self._height_mm)
# Assign all active outputs to crtcs
for output in list(self.outputs.values()):
if not output._mode or output._crtc:
continue
for crtc in output.get_crtcs():
if crtc and crtc.supports_output(output):
crtc.add_output(output)
output._changes = output._changes | CHANGES_CRTC
break
if not output._crtc:
#FIXME: Take a look at the pick_crtc code in xrandr.c
raise RRError("There is no matching crtc for the output")
# Apply stored changes of crtcs
for crtc in self.crtcs:
if crtc.has_changed():
crtc.apply_changes()
def apply_config(self):
"""Used for instantly applying RandR 1.0 changes"""
_check_required_version((1, 0))
status = rr.XRRSetScreenConfigAndRate(self._display,
self._config,
self._root,
self._size_index,
self._rotation,
self._rate,
self.get_timestamp())
return status
def _arrange_outputs(self):
"""Arrange all output positions according to their relative position"""
for output in self.get_outputs():
# Skip not changed and not used outputs
if not output.has_changed(CHANGES_RELATION) or \
output._mode is None:
continue
relative = output._relative_to
mode = self.get_mode_by_xid(output._mode)
mode_relative = self.get_mode_by_xid(relative._mode)
if not relative or not relative._mode:
output._x = 0
output._y = 0
output._changes = output._changes | CHANGES_POSITION
if output._relation == RELATION_LEFT_OF:
output._y = relative._y + output._relation_offset
output._x = relative._x - get_mode_width(
mode, output._rotation)
elif output._relation == RELATION_RIGHT_OF:
output._y = relative._y + output._relation_offset
output._x = relative._x + get_mode_width(mode_relative,
output._rotation)
elif output._relation == RELATION_ABOVE:
output._y = relative._y - get_mode_height(mode,
output._rotation)
output._x = relative._x + output._relation_offset
elif output._relation == RELATION_BELOW:
output._y = relative._y + get_mode_height(mode_relative,
output._rotation)
output._x = relative._x + output._relation_offset
elif output._relation == RELATION_SAME_AS:
output._y = relative._y + output._relation_offset
output._x = relative._x + output._relation_offset
output._changes = output._changes | CHANGES_POSITION
# Normalize the postions so to the upper left cornor of all outputs
# is at 0,0
min_x = 32768
min_y = 32768
for output in self.get_outputs():
if output._mode is None:
continue
if output._x < min_x:
min_x = output._x
if output._y < min_y:
min_y = output._y
for output in self.get_outputs():
if output._mode is None:
continue
output._x -= min_x
output._y -= min_y
output._changes = output._changes | CHANGES_POSITION
def _calculate_size(self):
"""Recalculate the pixel and physical size of the screen so that
it covers all outputs"""
width = self._width
height = self._height
for output in self.get_outputs():
if not output._mode:
continue
mode = self.get_mode_by_xid(output._mode)
x = output._x
y = output._y
w = get_mode_width(mode, output._rotation)
h = get_mode_height(mode, output._rotation)
if x + w > width:
width = x + w
if y + h > height:
height = y + h
if width > self._width_max or height > self._height_max:
raise RRError("The required size is not supported",
(width, height), (self._width_max, self._width_min))
else:
if height < self._height_min:
self._fb_height = self._height_min
else:
self._height = height
if width < self._width_min:
self._width = self._width_min
else:
self._width = width
#FIXME: Physical size is missing
def get_current_display():
"""Returns the currently used display"""
display_url = os.getenv("DISPLAY")
open_display = xlib.XOpenDisplay
# Set .argtypes and .restype, to ensure proper
# type check and conversion
open_display.restype = c_void_p
open_display.argtypes = [c_char_p]
# XOpenDisplay accepts a char*, but
# display_url is a unicode string therefore
# we convert it to a bytes string
dpy = open_display(display_url.encode('utf-8'))
return dpy
def get_current_screen():
"""Returns the currently used screen"""
screen = Screen(get_current_display())
return screen
def get_screen_of_display(display, count):
"""Returns the screen of the given display"""
dpy = xlib.XOpenDisplay(display)
return Screen(dpy, count)
def get_version():
"""Returns a tuple containing the major and minor version of the xrandr
extension or None if the extension is not available"""
major = c_int()
minor = c_int()
res = rr.XRRQueryVersion(get_current_display(),
byref(major), byref(minor))
if res:
return (major.value, minor.value)
return None
def has_extension():
"""Returns True if the xrandr extension is available"""
if XRANDR_VERSION:
return True
return False
def _to_gamma(gamma):
g = rr.XRRAllocGamma(len(gamma[0]))
for i in range(gamma[0]):
g.red[i] = gamma[0][i]
g.green[i] = gamma[1][i]
g.blue[i] = gamma[2][i]
return g
def _from_gamma(g):
gamma = ([], [], [])
for i in range(g.size):
gamma[0].append(g.red[i])
gamma[1].append(g.green[i])
gamma[2].append(g.blue[i])
rr.XRRFreeGamma(g)
def _check_required_version(version):
"""Raises an exception if the given or a later version of xrandr is not
available"""
if XRANDR_VERSION is None or XRANDR_VERSION < version:
raise UnsupportedRRError(version, XRANDR_VERSION)
def get_mode_height(mode, rotation):
"""Return the height of the given mode taking the rotation into account"""
if rotation & (RR_ROTATE_0 | RR_ROTATE_180):
return mode.height
elif rotation & (RR_ROTATE_90 | RR_ROTATE_270):
return mode.width
else:
return 0
def get_mode_width(mode, rotation):
"""Return the width of the given mode taking the rotation into account"""
if rotation & (RR_ROTATE_0 | RR_ROTATE_180):
return mode.width
elif rotation & (RR_ROTATE_90 | RR_ROTATE_270):
return mode.height
else:
return 0
XRANDR_VERSION = get_version()
# vim:ts=4:sw=4:et
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