def _start(self): '''Open the image file, read the image header, copy the key / value pairs into an internal dictionary self._header_dictionary along with the length of the header in bytes self._header_size.''' from iotbx.detectors import EDFWrapper self.detectorbase = EDFWrapper(self._image_file) self.detectorbase.readHeader()
class FormatEDFALS733(Format):
"""EDF is the ESRF data format.
In present context, ALS 7.3.3 uses this format for its single-tile Pilatus
"""
@staticmethod
def understand(image_file):
try:
tag = FormatEDFALS733.open_file(image_file, "rb").read(10)
except IOError:
return False
return tag == "{\nHeaderID"
def __init__(self, image_file, **kwargs):
"""Initialise the image structure from the given file."""
from dxtbx import IncorrectFormatError
if not self.understand(image_file):
raise IncorrectFormatError(self, image_file)
Format.__init__(self, image_file, **kwargs)
def detectorbase_start(self):
pass
def _start(self):
"""Open the image file, read the image header, copy the key / value
pairs into an internal dictionary self._header_dictionary along with
the length of the header in bytes self._header_size."""
from iotbx.detectors import EDFWrapper
self.detectorbase = EDFWrapper(self._image_file)
self.detectorbase.readHeader()
def _goniometer(self):
return self._goniometer_factory.single_axis()
def _detector(self):
"""Return a model for a simple detector"""
twotheta = 0.0
return self._detector_factory.simple(
sensor="PAD",
distance=self.detectorbase.parameters["DISTANCE"],
beam_centre=(
self.detectorbase.parameters["BEAM_CENTER_X"],
self.detectorbase.parameters["BEAM_CENTER_Y"],
),
fast_direction="+x",
slow_direction="-y",
pixel_size=(
self.detectorbase.parameters["PIXEL_SIZE"],
self.detectorbase.parameters["PIXEL_SIZE"],
),
image_size=(
self.detectorbase.parameters["SIZE1"],
self.detectorbase.parameters["SIZE2"],
),
trusted_range=(0, self.detectorbase.saturation),
mask=[],
) # a list of dead rectangles
def _beam(self):
"""Return a simple model for the beam."""
return self._beam_factory.simple(wavelength=1.0) # dummy argument
def _scan(self):
"""Return the scan information for this image."""
return self._scan_factory.single(
filename=self._image_file,
format="EDF",
exposure_times=self.detectorbase.parameters["count_time"],
osc_start=0.0,
osc_width=0.0,
epoch=None,
)