/usr/lib/python2.7/dist-packages/ginga/rv/plugins/IIS_DataListener.py is in python-ginga 2.6.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# IIS_DataListener.py -- IIS (XImtool protocol) server
#
# This file contains code by "fpierfed" (email addr unknown) downloaded from:
# http://pyimtool.cvs.sourceforge.net/viewvc/pyimtool/pyimtool/src/
# and modified.
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
from __future__ import print_function
import sys, os
import socket, select
import threading
import logging
import time
import struct
import array
import re
import string
from ginga.misc import Bunch
import ginga.util.six as six
if six.PY2:
import SocketServer
else:
import socketserver as SocketServer
# internal globals
MEMORY = 0o1 # frame buffer i/o
LUT = 0o2 # lut i/o
FEEDBACK = 0o5 # used for frame clears
IMCURSOR = 0o20 # logical image cursor
WCS = 0o21 # used to set WCS
IIS_VERSION = 10 # version 1.0
PACKED = 0o040000
COMMAND = 0o100000
IIS_READ = 0o100000
IMC_SAMPLE = 0o040000
IMT_FBCONFIG = 0o77
XYMASK = 0o77777
MAX_FBCONFIG = 128 # max possible frame buf sizes
MAX_FRAMES = 15 # max number of frames (start from 0)
MAX_CLIENTS = 8 # max display server clients
DEF_NFRAMES = 1 # save memory; only one frame
DEF_FRAME_WIDTH = 512 # 512 square frame
DEF_FRAME_HEIGHT = 512 # 512 square frame
SZ_LABEL = 256 # main frame label string
SZ_IMTITLE = 128 # image title string
SZ_WCSBUF = 1024 # WCS text buffer size
SZ_OLD_WCSBUF = 320 # old WCS text buffer size
SZ_FIFOBUF = 4000 # transfer size for FIFO i/o
SZ_FNAME = 256
SZ_LINE = 256
SZ_IMCURVAL = 160
# WCS definitions.
W_UNITARY = 0
W_LINEAR = 1
W_LOG = 2
W_DEFFORMAT = " %7.2f %7.2f %7.1f%c"
VERBOSE = 1
class socketTimeout(Exception):
pass
class IIS_DataListener(object):
"""
A class that listens to a socket/fifo for incoming data.
It uses the XImtool protocol (libiio.a).
"""
def __init__(self, addr, name='DataListener',
controller=None, ev_quit=None, logger=None):
self.timeout = 0.5
self.addr = addr
self.nconnections = 5
if (addr.prot == 'inet'):
self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#s_address = (addr.host, addr.port)
s_address = ('', addr.port)
else:
self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s_address = addr.path
# attach a RequestHandler to the server
self.RequestHandlerClass = IIS_RequestHandler
# attach the interface controller class we will call this
# class' display_data() method.
self.controller = controller
# Controlled stop of server
if ev_quit is None:
ev_quit = threading.Event()
self.ev_quit = ev_quit
if logger is None:
logger = logging.getLogger(name)
self.logger = logger
# allow reuse of the socket
self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.socket.settimeout(self.timeout)
# bind the socket and start listening
self.socket.bind(s_address)
self.socket.listen(self.nconnections)
# so we don't have to block indefinitely on the socket.accept() method.
# See SocketServer.py
def get_request(self):
while not self.ev_quit.isSet():
#self.logger.debug("Ready to accept request, socket %s" % (
# str(self.socket)))
inputs = [ self.socket ]
try:
(sin, sout, sexp) = select.select(inputs, [], [], self.timeout)
except KeyboardInterrupt as e:
raise e
except select.error as e:
self.logger.error("select.error: %s" % str(e))
(code, msg) = e
# code==4 is interrupted system call. This typically happens
# when the process receives a signal.
if code == 4:
raise socketTimeout('select() timed out, system call interrupted')
raise e
for i in sin:
if i == self.socket:
conn = self.socket.accept()
# wierd hack dues to Solaris 10 handling of sockets
conn[0].setblocking(1)
return conn
# Normal timeout, nothing to do.
raise socketTimeout('select() timed out')
def handle_request(self):
"""
Handles incoming connections, one at the time.
"""
try:
(request, client_address) = self.get_request()
except socket.error as e:
# Error handling goes here.
self.logger.error("error opening the connection: %s" % (
str(e)))
for exctn in sys.exc_info():
print (exctn)
return
try:
self.RequestHandlerClass(request, client_address, self)
except Exception as e:
# Error handling goes here.
self.logger.error('error handling the request: %s' % (
str(e)))
for exctn in sys.exc_info():
print (exctn)
return
def mainloop(self):
"""main control loop."""
try:
while (not self.ev_quit.isSet()):
try:
self.handle_request()
except socketTimeout:
continue
finally:
self.socket.close()
def stop(self):
self.ev_quit.set()
self.logger.info("stop() invoked on IIS DataListener.")
if (self.addr.prot == 'unix'):
try:
os.remove(self.addr.path)
except Exception as e:
self.logger.error("Failed to cleanup the pipe " + self.addr.path +
(": %s" % (str(e))))
class IIS_RequestHandler(SocketServer.StreamRequestHandler):
"""
This class does the actual work of parsing the incoming streams and
perform the necessary actions (display image, overlay regions
and so on).
IIS Header Packet Summary
TID Subunit Tct X Y Z T Data
+------------------+-------------+-----+---+---+----+---+--------+
Read Data | IIS_READ|PACKED | MEMORY | -NB | x | y | fr | - | nbytes |
Write Data | IIS_WRITE|PACKED | MEMORY | -NB | x | y | fr | - | nbytes |
Read Cursor | IIS_READ | IMCURSOR | - | - | - | wcs| - | - |
Write Cursor | IIS_WRITE | IMCURSOR | - | x | y | wcs| - | - |
Set Frame | IIS_WRITE | LUT|COMMAND | -1 | - | - | - | - | 2 |
Erase Frame | IIS_WRITE | fb | FEEDBACK | - | - | - | fr | - | - |
| | | | | | | | |
Old Read WCS | IIS_READ | WCS | - | - | - | fr | - | 320 |
Old Write WCS | IIS_WRITE|PACKED | WCS | -N | - | - | fr |fb | 320 |
| | | | | | | | |
WCS Version? | IIS_READ | WCS | - | 1 | 1 | - | - | 320 |
WCS by Num.? | IIS_READ | WCS | - | 1 | - | fr |wcs| 1024 |
New Read WCS | IIS_READ | WCS | - | 1 | - | fr | - | 1024 |
New Write WCS | IIS_WRITE|PACKED | WCS | -N | 1 | - | fr |fb | 1024 |
+------------------+-------------+-----+---+---+----+---+--------+
Where nbytes | NB = number of bytes expected or written
x = x position of operation in frame buffer coords
y = y position of operation in frame buffer coords
fr = frame number (passed as bitflag (i.e. 1, 2 ,4 8, etc)
fb = frame buffer config number (zero indexed)
N = length of WCS string
wcs = WCS number (usually zero)
Data = the number of bytes of data to be read or written
following the header packet.
"""
needs_update = False
# these NEED to be set automatically
# from the client interaction
width = None
height = None
frame = 0
x = 0
y = 0
y1 = -1
#sequence = -1
#key = None
#got_key = None
def decode_frameno(self, z):
try:
z = int(z)
except:
z = 1
if (not z):
z = 1
n = 0
while (not (z & 1)):
n += 1
z >>= 1
frame = max (1, n + 1)
return frame
def wcs_update(self, wcs_text, fb=None):
"""
parses the wcs_text and populates the fields
of a coord_tran instance.
we start from the coord_tran of the input
frame buffer, if any
"""
if (fb):
ct = fb.ct
else:
ct = coord_tran ()
if (not ct.valid):
ct.zt = W_UNITARY
# read wcs_text
data = string.split(wcs_text, '\n')
ct.imtitle = data[0]
# we are expecting 8 floats and 1 int
try:
(ct.a, ct.b, ct.c, ct.d,
ct.tx, ct.ty, ct.z1, ct.z2,
ct.zt) = string.split(data[1])
ct.a = float(ct.a)
ct.b = float(ct.b)
ct.c = float(ct.c)
ct.d = float(ct.d)
ct.tx = float(ct.tx)
ct.ty = float(ct.ty)
ct.z1 = float(ct.z1)
ct.z2 = float(ct.z2)
ct.zt = int(ct.zt)
except:
ct.imtitle = "[NO WCS]"
ct.a = 1
ct.d = 1
ct.b = 0
ct.c = 0
ct.tx = 0
ct.ty = 0
ct.zt = W_UNITARY
ct.valid += 1
# determine the best format for WCS output
if (ct.valid and ct.zt == W_LINEAR):
z1 = ct.z1
z2 = ct.z2
zrange = abs(z1 - z2)
zavg = (abs(z1) + abs(z2)) / 2.0
if (zrange < 100.0 and zavg < 200.0):
ct.format = " %7.2f %7.2f %7.3f%c"
elif (zrange > 99999.0 or zavg > 99999.0):
ct.format = " %7.2f %7.2f %7.3g%c"
else:
ct.format = W_DEFFORMAT
else:
ct.format = " %7.2f %7.2f %7.0f%c"
# add_mapping, if we can
if (len(data) < 4):
return(ct)
# we are expecting 1 string, 2 floats, and 6 int
try:
print("updating WCS: %s" % str(data[2]))
(ct.region, ct.sx, ct.sy, ct.snx,
ct.sny, ct.dx, ct.dy, ct.dnx,
ct.dny) = string.split(data[2])
ct.sx = float(ct.sx)
ct.sy = float(ct.sy)
ct.snx = int(ct.snx)
ct.sny = int(ct.sny)
# dx, dy: offset into frame where actual data starts
ct.dx = int(ct.dx)
ct.dy = int(ct.dy)
# dnx, dny: length of actual data in frame from offsets
ct.dnx = int(ct.dnx)
ct.dny = int(ct.dny)
ct.ref = string.strip(data[3])
# if this works, we also have the real size of the image
fb.img_width = ct.dnx + 1 # for some reason, the width is always
# 1 pixel smaller...
fb.img_height = ct.dny
except:
ct.region = 'none'
ct.sx = 1.0
ct.sy = 1.0
ct.snx = fb.width
ct.sny = fb.height
ct.dx = 1
ct.dy = 1
ct.dnx = fb.width
ct.dny = fb.height
ct.ref = 'none'
return (ct)
def return_cursor(self, dataout, sx, sy, frame, wcs, key, strval=''):
"""
writes the cursor position to dataout.
input:
dataout: the output stream
sx: x coordinate
sy: y coordinate
wcs: nonzero if we want WCS translation
frame: frame buffer index
key: keystroke used as trigger
strval: optional string value
"""
#print "RETURN CURSOR"
wcscode = (frame + 1) * 100 + wcs
if (key == '\32'):
curval = "EOF"
else:
if (key in string.printable and not key in string.whitespace):
keystr = key
else:
keystr = "\\%03o" % (ord(key))
# send the necessary infor to the client
curval = "%10.3f %10.3f %d %s %s\n" % (sx, sy, wcscode, keystr, strval)
dataout.write(right_pad(curval, SZ_IMCURVAL))
#print "END RETURN CURSOR"
def handle_feedback(self, pkt):
"""This part of the protocol is used by IRAF to erase a frame in
the framebuffers.
"""
self.logger.debug("handle feedback")
self.frame = self.decode_frameno(pkt.z & 0o7777) - 1
# erase the frame buffer
fb = self.server.controller.init_frame(self.frame)
self.server.controller.set_frame(self.frame)
def handle_lut(self, pkt):
"""This part of the protocol is used by IRAF to set the frame number.
"""
self.logger.debug("handle lut")
if pkt.subunit & COMMAND:
data_type = str(pkt.nbytes / 2) + 'h'
size = struct.calcsize(data_type)
line = pkt.datain.read(pkt.nbytes)
n = len(line)
if (n < pkt.nbytes):
return
try:
x = struct.unpack(data_type, line)
except Exception as e:
self.logger.error("Error unpacking struct: %s" % (str(e)))
return
if len(x) < 14:
# pad it with zeroes
y = []
for i in range(14):
try:
y.append(x[i])
except:
y.append(0)
x = y
del(y)
if len(x) == 14:
z = int(x[0])
# frames start from 1, we start from 0
self.frame = self.decode_frameno(z) - 1
if (self.frame > MAX_FRAMES):
self.logger.error("attempt to select non existing frame.")
return
# init the framebuffer
#self.server.controller.init_frame(self.frame)
try:
fb = self.server.controller.get_frame(self.frame)
except KeyError:
fb = self.server.controller.init_frame(self.frame)
return
self.logger.error("unable to select a frame.")
return
self.logger.error("what shall I do?")
def handle_wcs(self, pkt):
"""
This part of the protocol is used by IRAF to bidirectionally
communicate metadata about frames in the framebuffers.
IIS WCS format:
name - title\n
a b c d tx ty z1 z2 zt\n
region_name sx sy snx sny dx dy dnx dny\n
object_ref
where the new parameters are defined as
region_name - user-defined name for the region (e.g. 'image',
'subras1', 'ccd3', etc).
sx, sy, snx, sny - source rect in the object
dx, dy, dnx, dny - dest rect in the display frame buffer
object_ref - full node!/path/image[sec] image name, same as
was immap'd when the image was displayed. Used
for access after the display
"""
self.logger.debug("handle wcs")
if pkt.tid & IIS_READ:
self.logger.debug("iis read")
# Return the WCS for the referenced frame.
if (pkt.x & 0o17777) and (pkt.y & 0o17777):
# return IIS version number
text = "version=" + str(IIS_VERSION)
text = right_pad(text, SZ_OLD_WCSBUF)
else:
frame = self.decode_frameno(pkt.z & 0o177777) - 1
try:
fb = self.server.controller.get_frame(frame)
except KeyError:
fb = None
self.logger.debug("frame=%d fb=%s" % (frame, fb))
if (pkt.x & 0o17777) and (pkt.t & 0o17777):
self.frame = frame
if (fb and fb.ct.a is not None):
wcs = "%s\n%f %f %f %f %f %f %f %f %d\n" % (
fb.ct.imtitle, fb.ct.a, fb.ct.b, fb.ct.c, fb.ct.d,
fb.ct.tx, fb.ct.ty, fb.ct.z1, fb.ct.z2, fb.ct.zt)
else:
wcs = "[NOSUCHWCS]\n"
if (fb and fb.ct.sx is not None):
mapping = "%s %f %f %d %d %d %d %d %d\n%s\n" % (
fb.ct.region, fb.ct.sx, fb.ct.sy, fb.ct.snx, fb.ct.sny,
fb.ct.dx, fb.ct.dy, fb.ct.dnx, fb.ct.dny, fb.ct.ref)
else:
mapping = ""
text = wcs + mapping
text = right_pad(text, SZ_WCSBUF)
else:
if (frame < 0) or (fb is None) or (fb.buffer is None) or \
(len(fb.buffer) == 0):
text = "[NOSUCHFRAME]"
else:
text = fb.wcs
# old style or new style?
if pkt.x & 0o777:
text = right_pad(text, SZ_WCSBUF)
else:
text = right_pad(text, SZ_OLD_WCSBUF)
self.logger.debug("WCS: " + text)
pkt.dataout.write(text)
else:
self.logger.debug("iis write")
# Read the WCS information from the client
# frames start from 1, we start from 0
self.frame = self.decode_frameno(pkt.z & 0o7777) - 1
try:
fb = self.server.controller.get_frame(self.frame)
except KeyError:
# the selected frame does not exist, create it
fb = self.server.controller.init_frame(self.frame)
# set the width and height of the framebuffer
fb_config = (pkt.t & 0o777) + 1
try:
(nframes, fb.width, fb.height) = fbconfigs [fb_config]
except KeyError:
self.logger.warning('Non existing framebuffer config (%s)' % (
str(fb_config)))
self.logger.info('Adding a new framebuffer config (%s)' % (
str(fb_config)))
fbconfigs[fb_config] = [1, None, None]
fb.width = None
fb.height = None
# do we have to deal with the new WCS format? (not used, for now)
new_wcs = (pkt.x & 0o777)
# read the WCS info
line = pkt.datain.read(pkt.nbytes)
# paste it in the frame buffer
fb.wcs = line
fb.ct.format = W_DEFFORMAT
fb.ct.imtitle = ''
fb.ct.valid = 0
fb.ct = self.wcs_update(line, fb)
# end of handle_wcs()
def handle_memory(self, pkt):
"""This part of the protocol is used by IRAF to read/write image data
in the framebuffers.
"""
self.logger.debug("handle memory")
# get the frame number, we start from 0
self.frame = self.decode_frameno(pkt.z & 0o7777) - 1
try:
fb = self.server.controller.get_frame(self.frame)
except KeyError:
# the selected frame does not exist, create it
fb = self.server.controller.init_frame(self.frame)
self.x = pkt.x & XYMASK
self.y = pkt.y & XYMASK
self.logger.debug("memory frame=%d x,y=%d,%d fb width=%s height=%s" % (
self.frame, self.x, self.y, fb.width, fb.height))
if (pkt.tid & IIS_READ):
self.logger.debug("start memory read")
# read the data and send back to server
start = self.x + self.y * fb.width
end = start + pkt.nbytes
data = fb.buffer[start:end]
if len(data) != pkt.nbytes:
self.logger.warning("buffer length/packet size mismatch: %d != %d" % (
len(data), pkt.nbytes))
#data.reverse()
#self.logger.debug("DATA=%s" % str(data))
buf = data.tostring()
pkt.dataout.write(buf)
pkt.dataout.flush()
self.logger.debug("end memory read")
else:
self.logger.debug("start memory write")
# read the data from socket
t_bytes = 0
self.logger.debug("data bytes=%d needs_update=%s" % (
pkt.nbytes, self.needs_update))
if (fb.width is not None) and (fb.height is not None):
if not self.needs_update:
#del fb.buffer
#fb.buffer = array.array('B', ' ' * fb.width * fb.height)
if len(fb.buffer) != fb.width * fb.height:
fb.buffer = array.array('B', '\000' * fb.width * fb.height)
#self.needs_update = True
start = self.x + self.y * fb.width
end = start + pkt.nbytes
fb.buffer[start:end] = array.array('B', pkt.datain.read(pkt.nbytes))
else:
self.logger.warning("uninitialized framebuffer frame=%d" % (
self.frame))
if not self.needs_update:
# init the framebuffer
fb.buffer.fromstring(pkt.datain.read(pkt.nbytes))
fb.buffer.reverse()
#self.needs_update = True
else:
data = array.array('B', pkt.datain.read(pkt.nbytes))
data.reverse()
fb.buffer += data
self.needs_update = True
self.logger.debug("end memory write")
# width = fb.width
# if (not width and self.y1 < 0):
# self.y1 = self.y
# self.logger.debug('saved y coordinate.')
# elif not width:
# delta_y = self.y - self.y1
# width = int(abs(len(data) / delta_y))
# self.logger.debug('resetting framebuffer width=%d' % (
# width))
# fb.width = width
# # if we added a new fbconfigs entry, let's update
# # the value for the framebuffer width!
# if fbconfigs.has_key(fb.config):
# fbconfigs[fb.config][1] = width
def handle_imcursor(self, pkt):
"""This part of the protocol is used by IRAF to read the cursor
position and keystrokes from the display client.
"""
self.logger.debug("handle imcursor")
done = 0
if pkt.tid & IIS_READ:
if pkt.tid & IMC_SAMPLE:
self.logger.debug("SAMPLE")
# return the cursor position
wcsflag = int(pkt.z)
#wcsflag = 0
res = self.server.controller.get_keystroke()
self.return_cursor(pkt.dataout, res.x, res.y,
res.frame, wcsflag, '0', '')
else:
self.logger.debug("OTHER")
res = self.server.controller.get_keystroke()
self.logger.debug("FRAME=%d X,Y=%f,%f" % (
res.frame, res.x, res.y))
## sx = self.x
self.x = res.x
self.y = res.y
self.frame = res.frame
## sy = self.y
## frame = self.frame
#wcsflag = 1
wcsflag = 0
#self.return_cursor(pkt.dataout, sx, sy, frame, 1, key, '')
self.return_cursor(pkt.dataout, res.x, res.y,
res.frame, wcsflag, res.key, '')
else:
self.logger.debug("READ")
# read the cursor position in logical coordinates
sx = int(pkt.x)
sy = int(pkt.y)
wx = float(pkt.x)
wy = float(pkt.y)
wcs = int(pkt.z)
if wcs:
# decode the WCS info for the current frame
try:
fb = self.server.controller.get_frame(self.frame)
except KeyError:
# the selected frame does not exist, create it
fb = self.server.controller.init_frame(self.frame)
fb.ct = self.wcs_update(fb.wcs)
if fb.ct.valid:
if abs(fb.ct.a) > 0.001:
sx = int((wx - fb.ct.tx) / fb.ct.a)
if abs(fb.ct.d) > 0.001:
sy = int((wy - xt.ty) / fb.ct.d)
self.server.controller.set_cursor(sx, sy)
def handle(self):
"""
This is where the action starts.
"""
self.logger = self.server.logger
# create a packet structure
packet = iis()
packet.datain = self.rfile
packet.dataout = self.wfile
# decode the header
size = struct.calcsize('8h')
line = packet.datain.read(size)
n = len(line)
if n < size:
return
while n > 0:
try:
bytes = struct.unpack('8h', line)
except:
self.logger.error('error unpacking the data.')
for exctn in sys.exc_info():
print (exctn)
# TODO: verify checksum
# decode the packet fields
subunit = bytes[2]
subunit077 = subunit & 0o77
tid = bytes[0]
x = bytes[4] & 0o177777
y = bytes[5] & 0o177777
z = bytes[6] & 0o177777
t = bytes[7] & 0o17777
ndatabytes = - bytes[1]
# are the bytes packed?
if (not(tid & PACKED)):
ndatabytes *= 2
# populate the packet structure
packet.subunit = subunit
packet.subunit077 = subunit077
packet.tid = tid
packet.x = x
packet.y = y
packet.z = z
packet.t = t
packet.nbytes = ndatabytes
# decide what to do, depending on the
# value of subunit
self.logger.debug("PACKET IS %o" % packet.subunit)
if packet.subunit077 == FEEDBACK:
self.handle_feedback(packet)
elif packet.subunit077 == LUT:
self.handle_lut(packet)
# read the next packet
line = packet.datain.read(size)
n = len(line)
continue
elif packet.subunit077 == MEMORY:
self.handle_memory(packet)
if self.needs_update:
#self.display_image()
pass
# read the next packet
line = packet.datain.read(size)
n = len(line)
continue
elif packet.subunit077 == WCS:
self.handle_wcs(packet)
line = packet.datain.read(size)
n = len(line)
continue
elif packet.subunit077 == IMCURSOR:
self.handle_imcursor(packet)
line = packet.datain.read(size)
n = len(line)
continue
else:
self.logger.debug('?NO OP (0%o)' % (packet.subunit077))
if not (packet.tid & IIS_READ):
# OK, discard the rest of the data
nbytes = packet.nbytes
while nbytes > 0:
# for (nbytes = ndatabytes; nbytes > 0; nbytes -= n):
if nbytes < SZ_FIFOBUF:
n = nbytes
else:
n = SZ_FIFOBUF
m = self.rfile.read(n)
if m <= 0:
break
nbytes -= n
# read the next packet
line = packet.datain.read(size)
n = len(line)
if n < size:
return
# <--- end of the while (n) loop
if self.needs_update:
self.display_image()
self.needs_update = False
def display_image(self, reset=1):
"""Utility routine used to display an updated frame from a framebuffer.
"""
try:
fb = self.server.controller.get_frame(self.frame)
except KeyError:
# the selected frame does not exist, create it
fb = self.server.controller.init_frame(self.frame)
if not fb.height:
width = fb.width
height = int(len(fb.buffer) / width)
fb.height = height
# display the image
if (len(fb.buffer) > 0) and (height > 0):
self.server.controller.display(self.frame, width, height,
True)
else:
self.server.controller.display(self.frame, fb.width, fb.height,
False)
def decode_iis(self, data):
f = file('/tmp/pippo', 'wb')
f.write(data)
f.close()
return (decoded_data)
# Frame buffer configurations
fbconfigs = {
1: [2, 512, 512],
2: [2, 800, 800],
3: [2, 1024, 1024],
4: [1, 1600, 1600],
5: [1, 2048, 2048],
6: [1, 4096, 4096],
7: [1, 8192, 8192],
8: [1, 1024, 4096],
9: [2, 1144, 880],
10: [2, 1144, 764],
11: [2, 128, 128],
12: [2, 256, 256],
13: [2, 128, 1056],
14: [2, 256, 1056],
15: [2, 1056, 128],
16: [2, 1056, 256],
17: [2, 1008, 648],
18: [2, 1024, 680],
19: [1, 4096, 1024],
20: [2, 388, 576],
21: [1, 3040, 976],
22: [1, 128, 1520],
23: [1, 256, 1520],
24: [1, 512, 1520],
25: [1, 960, 1520],
26: [1, 1232, 800],
27: [1, 3104, 512],
28: [1, 976, 3040],
29: [1, 800, 256],
30: [1, 256, 800],
31: [1, 1240, 400],
32: [2, 832, 800],
33: [2, 544, 512],
34: [1, 1056, 1024],
35: [1, 2080, 2048],
36: [2, 832, 820],
37: [2, 520, 512],
38: [1, 3104, 1024],
39: [1, 1232, 800],
40: [4, 1200, 600],
41: [1, 8800, 8800],
42: [1, 4400, 4400],
43: [1, 2200, 2200],
44: [1, 1100, 1100],
45: [1, 2080, 4644],
46: [1, 6400, 4644],
47: [1, 3200, 2322],
48: [1, 1600, 1161],
49: [1, 800, 581],
50: [1, 2048, 2500]}
class iis(object):
def __init__ (self):
self.tid = None
self.subunit = None
self.subunit077 = None
self.nbytes = None
self.x = None
self.y = None
self.z = None
self.t = None
self.datain = None
self.dataout = None
class coord_tran(object):
def __init__ (self):
# coordinate transformation:
# screen -> physical
self.valid = 0 # has the WCS been validated/parsed?
self.a = 1 # x scale factor
self.b = 0 # y scale factor
self.c = 0 # x cross factor
self.d = 1 # y cross factor
self.tx = 0 # translation in x
self.ty = 0 # translation in y
self.z1 = 0 # min greyscale value
self.z2 = 1 # max greyscale value
self.zt = W_UNITARY # greyscale mapping
self.format = '' # WCS output format
self.imtitle = '' # image title from WCS
# physical -> celestial
self.regid = None
self.id = None
# src/dst region mapping
self.ref = ''
self.region = ''
self.sx = 1.0
self.sy = 1.0
self.snx = DEF_FRAME_WIDTH
self.sny = DEF_FRAME_WIDTH
self.dx = 1
self.dy = 1
self.dnx = DEF_FRAME_WIDTH
self.dny = DEF_FRAME_WIDTH
class framebuffer(object):
def __init__ (self):
self.width = None # width of the framebuffer
self.height = None # height of the framebuffer
self.img_width = None # width of the image
self.img_height = None # height of the image
self.config = None # framebuffer config index
# (see fbconfigs dictionary)
self.wcs = None # WCS
self.image = None # the image data itself
self.bitmap = None # the image bitmap
self.buffer = None # used for screen updates
self.zoom = 1.0 # zoom level
self.ct = coord_tran()
self.chname = None
# utility routines
def wcs_pix_transform (ct, i, format=0):
"""Computes the WCS corrected pixel value given a coordinate
transformation and the raw pixel value.
Input:
ct coordinate transformation. instance of coord_tran.
i raw pixel intensity.
format format string (optional).
Returns:
WCS corrected pixel value
"""
z1 = float (ct.z1)
z2 = float (ct.z2)
i = float (i)
yscale = 128.0 / (z2 - z1)
if (format == 'T' or format == 't'):
format = 1
if (i == 0):
t = 0.
else:
if (ct.zt == W_LINEAR):
t = ((i - 1) * (z2 - z1) / 199.0) + z1;
t = max (z1, min (z2, t))
else:
t = float (i)
if (format > 1):
t = (z2 - t) * yscale
return (t)
def wcs_coord_transform (ct, x, y):
"""Computes tha WCS corrected pixel coordinates (RA and Dec
in degrees) given a coordinate transformation and the screen
coordinates (x and y, in pixels).
Input:
ct coordinate transformation. instance of coord_tran.
x x coordinate in pixels.
y y coordinate in pixels.
Returns:
(RA, Dec) in degrees (as floats).
"""
x = float (x)
y = float (y)
if (ct.valid):
# The imtool WCS assumes that the center of the first display
# pixel is at (0,0) but actually it is at (0.5,0.5).
#x -= 0.5
#y -= 0.5
if (abs(ct.a) > .001):
ra = ct.a * x + ct.c * y + ct.tx
if (abs(ct.d) > .001):
dec = ct.b * x + ct.d * y + ct.ty
else:
ra = x
dec = y
return ((ra, dec))
def sex2deg(sex, sep=':'):
try:
(dd, mm, ss) = string.split(string.strip(sex), sep)
except:
(dd, mm) = string.split(string.strip(sex), sep)
ss = '0'
if(float(dd) >= 0):
return(float(dd) + float(mm) / 60.0 + float(ss) / 3600.0)
else:
return(float(dd) - float(mm) / 60.0 - float(ss) / 3600.0)
def deg2sex (deg, sep=':'):
try:
deg = float (deg)
except:
return ('')
degrees = int (deg)
if(degrees >= 0):
temp = (deg - degrees) * 60
minutes = int (temp)
seconds = int ((temp - minutes) * 60)
else:
temp = - (deg - degrees) * 60
minutes = int (temp)
seconds = int ((temp - minutes) * 60)
sex = "%02d%c%02d%c%05.2f" % (degrees, sep, minutes, sep, seconds)
return (sex)
def right_pad (strg, length, ch=' '):
"""As seen on http://www.halfcooked.com/mt/archives/000640.html"""
return (strg + ch * (length - len(strg)))
def get_interface(addr=None):
if addr:
imtdev = addr
else:
try:
imtdev = os.environ['IMTDEV']
except KeyError:
#port = 5137
uid = os.getuid()
path = '/tmp/.IMT' + str(uid)
prot = 'unix'
name = "%s:%s" % (prot, path)
return Bunch.Bunch(prot=prot, path=path, name=name)
n, match = 1, re.match(r'^(inet)\:(\d+)\:([\w\._\-]+)$', imtdev)
if not match:
n, match = 2, re.match(r'^(inet)\:(\d+)$', imtdev)
if not match:
n, match = 3, re.match(r'^(unix)\:(.+)$', imtdev)
if not match:
n, match = 4, re.match(r'^(\d+)$', imtdev)
if not match:
# Error
raise socketError("I don't understand the format of addr IMTDEV: '%s'" % (imtdev))
if n == 1:
prot, port, host = match.groups()
port = int(port)
return Bunch.Bunch(prot=prot, port=port, host=host, name=imtdev)
elif n == 2:
prot, port = match.groups()
port = int(port)
return Bunch.Bunch(prot=prot, port=port, host='', name=imtdev)
elif n == 3:
prot, path = match.groups()
return Bunch.Bunch(prot=prot, path=path, name=imtdev)
elif n == 4:
port = match.group(1)
port = int(port)
prot = 'inet'
return Bunch.Bunch(prot=prot, port=port, host='', name=imtdev)
#END
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