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more optional output arg support

This commit is contained in:
John Cupitt 2014-09-16 08:36:29 +01:00
parent c20c85b474
commit 1c1f7a205a
1 changed files with 14 additions and 7 deletions
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21
python/vips8/vips.py
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@ -159,12 +159,23 @@ def _call_base(name, required, optional, self = None, option_string = None):
not x.flags & enm.REQUIRED and
not x.isset}
# and the names of all optional output args ... we use "x = True"
# in args to mean add that to output
optional_output = {x.name: x for x in args if x.flags & enm.OUTPUT and
not x.flags & enm.REQUIRED}
# set optional input args
for key in optional.keys():
if not key in optional_input:
if key in optional_input:
optional_input[key].set_value(optional[key])
elif key in optional_output:
# must be a literal True value
if optional[key] is not True:
raise Error('Optional output argument must be True.',
'Argument %s should equal True.' % key)
else:
raise Error('Unknown argument.',
'Operator %s has no argument %s' % (name, key))
optional_input[key].set_value(optional[key])
# call
op2 = Vips.cache_operation_build(op)
@ -188,13 +199,9 @@ def _call_base(name, required, optional, self = None, option_string = None):
if x.flags & enm.INPUT and x.flags & enm.MODIFY:
out.append(x.get_value())
# find all optional output args
optional_output = [x.name for x in args if x.flags & enm.OUTPUT and
not x.flags & enm.REQUIRED]
for x in optional.keys():
if x in optional_output:
out.append(x.get_value())
out.append(optional_output[x].get_value())
if len(out) == 1:
out = out[0]