def vips_call(name, *required, **optional):
op = Vips.Operation.new(name)
# set required input args
i = 0
for prop in op.props:
flags = op.get_argument_flags(prop.name)
if required_input(flags):
if i >= len(required):
print 'too few required args!'
op.props.__setattr__(prop.name, required[i])
i += 1
if i < len(required):
print 'too many required args!'
# set optional input args
for i in optional.keys():
flags = op.get_argument_flags(i)
if optional_input(flags):
op.props.__setattr__(i, optional[i])
# call
op2 = Vips.cache_operation_build(op)
if op2 == None:
print Vips.error_buffer()
# gather output args
out = []
for prop in op2.props:
flags = op2.get_argument_flags(prop.name)
if required_output(flags):
out.append(op2.props.__getattribute__(prop.name))
for i in optional.keys():
flags = op2.get_argument_flags(i)
if optional_output(flags):
out.append(op2.props.__getattribute__(i))
if len(out) == 1:
out = out[0]
# unref everything now we have refs to all outputs we want
op2.unref_outputs()
return out
def __init__(self, message, detail=None):
self.message = message
if detail == None:
detail = Vips.error_buffer()
Vips.error_clear()
self.detail = detail
logging.debug('vips: Error %s %s', self.message, self.detail)
def __init__(self, message, detail = None):
self.message = message
if detail == None:
detail = Vips.error_buffer()
Vips.error_clear()
self.detail = detail
logging.debug('vips: Error %s %s', self.message, self.detail)
#!/usr/bin/python
import sys
# you might need this in your .bashrc
# export GI_TYPELIB_PATH=$VIPSHOME/lib/girepository-1.0
from gi.repository import Vips
print 'long way around:'
a = Vips.Image()
a.props.filename = sys.argv[1]
a.props.mode = 'r'
if a.build() != 0:
print Vips.error_buffer()
sys.exit(-1)
print 'a.get_width() =', a.get_width()
print 'a.props.width =', a.props.width
print 'via foreign load system:'
loader = Vips.Foreign.find_load(sys.argv[1])
if loader == None:
print Vips.error_buffer()
sys.exit(-1)
op = Vips.Operation.new(loader)
for prop in op.props:
print 'prop.name =', prop.name
flags = op.get_argument_flags(prop.name)
