def _probe_backend(self):
'''Find and instantiate a suitable backend'''
self.backend = None
try:
# nVidia must be probed before XRandR because it uses XRandR in a
# non-standard way
from swnvidia import NVidiaSwitcher
self.backend = NVidiaSwitcher()
self.log.info('backend: nVidia')
return
except SyntaxError:
raise
except:
pass
try:
from swxrandr import XRandrSwitcher
self.backend = XRandrSwitcher()
self.log.info('backend: XRandR')
return
except SyntaxError:
raise
except:
pass
if not self.backend:
raise Exception('No suitable backend found')
def _probe_backend(self):
'''Find and instantiate a suitable backend'''
self.backend = None
try:
# nVidia must be probed before XRandR because it uses XRandR in a
# non-standard way
from swnvidia import NVidiaSwitcher
self.backend = NVidiaSwitcher()
self.log.info('backend: nVidia')
return
except SyntaxError: raise
except: pass
try:
from swxrandr import XRandrSwitcher
self.backend = XRandrSwitcher()
self.log.info('backend: XRandR')
return
except SyntaxError: raise
except: pass
if not self.backend:
raise Exception('No suitable backend found')
class Switcher:
_displays = None
_resolutions = ResolutionCollection()
backend = None
def __init__(self):
'''Initialise the switcher and find a backend'''
self.log = logging.getLogger('disper.switcher')
self._probe_backend()
def _probe_backend(self):
'''Find and instantiate a suitable backend'''
self.backend = None
try:
# nVidia must be probed before XRandR because it uses XRandR in a
# non-standard way
from swnvidia import NVidiaSwitcher
self.backend = NVidiaSwitcher()
self.log.info('backend: nVidia')
return
except SyntaxError: raise
except: pass
try:
from swxrandr import XRandrSwitcher
self.backend = XRandrSwitcher()
self.log.info('backend: XRandR')
return
except SyntaxError: raise
except: pass
if not self.backend:
raise Exception('No suitable backend found')
## the following methods must be defined by backends; see swnvidia.py
## for a complete example and an explanation of these methods
#def get_displays(self):
#def get_primary_display(self):
#def get_display_name(self, ndisp):
#def get_display_supported_res(self, ndisp):
#def get_display_preferred_res(self, ndisp):
#def get_display_edid(self, ndisp):
#def switch_clone(self, displays, res):
#def switch_extend(self, displays, direction, ress):
#def import_config(self, cfg):
#def export_config(self):
def __getattr__(self, name):
'''Pass unrecognised methods to the switcher itself; this is to
simulate binding to a parent class at runtime.'''
return getattr(self.backend, name)
def get_displays(self):
'''return an array of connected displays'''
# hash displays to avoid probing twice
if self._displays: return self._displays
self._displays = self.backend.get_displays()
# always put primary display in front
if self.get_primary_display() in self._displays:
self._displays = [self.get_primary_display()] + \
filter(lambda x: x!=self.get_primary_display(), self._displays)
return self._displays
def get_resolutions_display(self, disp):
'''return a list of resolutions for the specified display'''
# hash resolutions to avoid probing them twice
if disp in self._resolutions: return self._resolutions[disp]
# get supported resolutions from driver
r = ResolutionList(self.backend.get_display_supported_res(disp))
if len(r)==0:
r = ResolutionList('800x600, 640x480')
self.log.warning('no resolutions found for display %s, falling back to: %s'%(disp, r))
# bump weight of flat-panel display with 1000
res = self.backend.get_display_preferred_res(disp)
if res:
res = Resolution(res)
if res in r: r[r.index(res)].weight += 1000
else: r.append(res)
# bump weight of EDID resolutions with 100
edid_data = self.backend.get_display_edid(disp)
if edid_data:
edid = Edid(edid_data)
for d in edid.get_monitor_details():
title, info = d
if title != 'Detailed Timing': continue
res = Resolution([info['horizontal_active'], info['vertical_active']])
if res in r: r[r.index(res)].weight += 100
else: r.append(res)
self.log.info('resolutions of '+str(disp)+': '+', '.join(map(str,sorted(r))))
self._resolutions[disp] = r
return r
def get_resolutions(self, displays):
'''return a ResolutionCollection which is a hash with resolutions for
each display'''
res = ResolutionCollection()
for disp in displays:
res[disp] = self.get_resolutions_display(disp)
return res
class Switcher:
_displays = None
_resolutions = ResolutionCollection()
backend = None
def __init__(self):
'''Initialise the switcher and find a backend'''
self.log = logging.getLogger('disper.switcher')
self._probe_backend()
def _probe_backend(self):
'''Find and instantiate a suitable backend'''
self.backend = None
try:
# nVidia must be probed before XRandR because it uses XRandR in a
# non-standard way
from swnvidia import NVidiaSwitcher
self.backend = NVidiaSwitcher()
self.log.info('backend: nVidia')
return
except SyntaxError:
raise
except:
pass
try:
from swxrandr import XRandrSwitcher
self.backend = XRandrSwitcher()
self.log.info('backend: XRandR')
return
except SyntaxError:
raise
except:
pass
if not self.backend:
raise Exception('No suitable backend found')
## the following methods must be defined by backends; see swnvidia.py
## for a complete example and an explanation of these methods
#def get_displays(self):
#def get_primary_display(self):
#def get_display_name(self, ndisp):
#def get_display_supported_res(self, ndisp):
#def get_display_preferred_res(self, ndisp):
#def get_display_edid(self, ndisp):
#def switch_clone(self, displays, res):
#def switch_extend(self, displays, direction, ress):
#def import_config(self, cfg):
#def export_config(self):
def __getattr__(self, name):
'''Pass unrecognised methods to the switcher itself; this is to
simulate binding to a parent class at runtime.'''
return getattr(self.backend, name)
def get_displays(self):
'''return an array of connected displays'''
# hash displays to avoid probing twice
if self._displays: return self._displays
self._displays = self.backend.get_displays()
# always put primary display in front
if self.get_primary_display() in self._displays:
self._displays = [self.get_primary_display()] + \
filter(lambda x: x!=self.get_primary_display(), self._displays)
return self._displays
def get_resolutions_display(self, disp):
'''return a list of resolutions for the specified display'''
# hash resolutions to avoid probing them twice
if disp in self._resolutions: return self._resolutions[disp]
# get supported resolutions from driver
r = ResolutionList(self.backend.get_display_supported_res(disp))
if len(r) == 0:
r = ResolutionList('800x600, 640x480')
self.log.warning(
'no resolutions found for display %s, falling back to: %s' %
(disp, r))
# bump weight of flat-panel display with 1000
res = self.backend.get_display_preferred_res(disp)
if res:
res = Resolution(res)
if res in r: r[r.index(res)].weight += 1000
else: r.append(res)
# bump weight of EDID resolutions with 100
edid_data = self.backend.get_display_edid(disp)
if edid_data:
edid = Edid(edid_data)
for d in edid.get_monitor_details():
title, info = d
if title != 'Detailed Timing': continue
res = Resolution(
[info['horizontal_active'], info['vertical_active']])
if res in r: r[r.index(res)].weight += 100
else: r.append(res)
self.log.info('resolutions of ' + str(disp) + ': ' +
', '.join(map(str, sorted(r))))
self._resolutions[disp] = r
return r
def get_resolutions(self, displays):
'''return a ResolutionCollection which is a hash with resolutions for
each display'''
res = ResolutionCollection()
for disp in displays:
res[disp] = self.get_resolutions_display(disp)
return res