/usr/lib/python2.7/dist-packages/hpi.py is in hugin-tools 2016.2.0+dfsg-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | #! /usr/bin/env python
from __future__ import print_function
# hpi.py - dispatcher for hugin plugins
#
# Copyright (C) 2011 Kay F. Jahnke
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
# the dispatcher is currently not very sophisticated. All it does
# is take the string passed to it in the 'plugin' parameter and
# tries to find a file of that name and execute it. The file is
# expected to define a function 'entry'.
# If loading succeeds, an attempt is made to call the function
# entry() with the parameters passed to the dispatcher after
# the plugin name; currently this is always a pointer to the
# current panorama and nothing else.
def hpi_dispatch ( plugin_name , *args ) :
print("hpi: accessing plugin file %s" % plugin_name)
try :
if os.path.exists ( plugin_name ) :
# there is a file by that name. let's execute it
# we make an empty dictionary as globals for the plugin
plugin = dict()
# and execute the plugin there
exec(compile(open( plugin_name ).read(), plugin_name, 'exec'), plugin)
# the plugin should have put a function entry()
# into it's global namespace, we call it
success = plugin [ 'entry' ] ( *args )
# then we get rid of the dictionary again to free
# all resources the plugin may have anchored there
print ( 'hpi: plugin terminated with exit code %d' % success )
del plugin
else :
# KFJ 2011-06-16 loading plugins as modules is no
# longer supported (wasn't used anyway)
# missing plugin file is an error:
print("hpi: can't find plugin file")
success = -10
# KFJ 2011-06-19 added better exception handling
# we catch any exception which may have occurred in the plugin:
except Exception:
# to deal with the exception, we import two more modules:
import sys
import traceback
# first we retrieve the details of the exception:
exc_type, exc_value, exc_traceback = sys.exc_info()
# emit a message with the type and text of the exception:
print('hpi: plugin %s failed with %s: "%s"'
% (os.path.basename(plugin_name),
exc_type.__name__,
exc_value) )
# and, for good measure, a stack traceback to point
# to the precise location and call history of the error:
print ( 'hpi: stack traceback:' )
traceback.print_tb ( exc_traceback )
success = -11
print ( 'hpi: terminating with exit code %d' % success )
return success
# The remainder of the file is not needed for calling from hugin.
# To allow testing of plugins without starting hugin, hpi.py
# can be run independently. In that case it takes at least
# two parameters: the panorama to open and the plugin to run.
# Additional parameters are passed on to the plugin.
# This is no more than an ad-hoc solution for testing; if
# behaviour like this is considered permanently useful, the
# mechanism should be polished some.
if __name__ == "__main__":
import sys
import hsi
# hpi.py has been called standalone rather than having been
# mported as a module. In this case we want to look at the
# argument vector:
if len ( sys.argv ) < 3 :
print("use: %s panorama.pto plugin.py [plugin args]"
% sys.argv[0])
sys.exit ( -12 )
# okay, there are some arguments, let's go ahead and try
# opening the first one as a panorama.
p = hsi.Panorama()
ifs = hsi.ifstream ( sys.argv[1] )
if not ifs.good() :
print("failed to open %s" % sys.argv[1])
sys.exit ( -13 )
# next, make the panorama object read the file
if p.readData ( ifs ) != hsi.DocumentData.SUCCESSFUL :
print("failed to read panorama data from %s" % sys.argv[1])
sys.exit ( -14 )
del ifs
# if we're here, the load succeeded and we can finally call
# the plugin
success = hpi_dispatch ( sys.argv[2] , p , *(sys.argv[3:]) )
# KFJ 2011-06-19 changed writeback to True, so that hpi.py
# can be used to execute hugin plugins on the command line
# and the result is written back to the pto file.
writeback = True
if writeback :
ofs = hsi.ofstream ( sys.argv[1] )
if not ofs.good() :
print("failed to open %s" % sys.argv[1])
sys.exit ( -15 )
if p.writeData ( ofs ) != hsi.DocumentData.SUCCESSFUL :
print("failed to write panorama data to %s" % sys.argv[1])
sys.exit ( -16 )
del ofs
sys.exit ( success )
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