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import logging
from pyvirtualdisplay.abstractdisplay import AbstractDisplay
log = logging.getLogger(__name__)
PROGRAM = "Xvfb"
class XvfbDisplay(AbstractDisplay):
"""
Xvfb wrapper
Xvfb is an X server that can run on machines with no display
hardware and no physical input devices. It emulates a dumb
framebuffer using virtual memory.
"""
def __init__(
self,
size=(1024, 768),
color_depth=24,
bgcolor="black",
use_xauth=False,
fbdir=None,
dpi=None,
retries=10,
extra_args=[],
manage_global_env=True,
):
"""
:param bgcolor: 'black' or 'white'
:param fbdir: If non-null, the virtual screen is memory-mapped
to a file in the given directory ('-fbdir' option)
:param dpi: screen resolution in dots per inch if not None
"""
self._screen = 0
self._size = size
self._color_depth = color_depth
self._bgcolor = bgcolor
self._fbdir = fbdir
self._dpi = dpi
AbstractDisplay.__init__(
self,
PROGRAM,
use_xauth=use_xauth,
retries=retries,
extra_args=extra_args,
manage_global_env=manage_global_env,
)
def _check_flags(self, helptext):
pass
def _cmd(self):
cmd = [
dict(black="-br", white="-wr")[self._bgcolor],
"-nolisten",
"tcp",
"-screen",
str(self._screen),
"x".join(map(str, list(self._size) + [self._color_depth])),
]
if self._fbdir:
cmd += ["-fbdir", self._fbdir]
if self._dpi is not None:
cmd += ["-dpi", str(self._dpi)]
if self._has_displayfd:
cmd += ["-displayfd", str(self._pipe_wfd)]
else:
cmd += [self.new_display_var]
return [PROGRAM] + cmd