125 lines
3.0 KiB
Python
Executable File
125 lines
3.0 KiB
Python
Executable File
#!/usr/bin/python
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import sys
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# you might need this in your .bashrc
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# export GI_TYPELIB_PATH=$VIPSHOME/lib/girepository-1.0
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from gi.repository import Vips
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print 'long way around:'
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a = Vips.Image()
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a.props.filename = sys.argv[1]
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a.props.mode = 'r'
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if a.build() != 0:
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print Vips.error_buffer()
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sys.exit(-1)
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print 'a.get_width() =', a.get_width()
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print 'a.props.width =', a.props.width
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print 'direct call:'
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b = Vips.Image.new_from_file(sys.argv[1])
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print 'b.get_width() =', b.get_width()
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print 'b.props.width =', b.props.width
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print 'call operation:'
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op = Vips.Operation.new("add")
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for prop in op.props:
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print 'prop.name =', prop.name
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flags = op.get_argument_flags(prop.name)
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if flags & Vips.ArgumentFlags.OUTPUT:
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print '\toutput'
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if flags & Vips.ArgumentFlags.INPUT:
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print '\tinput'
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if flags & Vips.ArgumentFlags.REQUIRED:
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print '\trequired'
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print '\tassigned', op.get_argument_assigned(prop.name)
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op.props.left = a
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op.props.right = b
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op2 = Vips.cache_operation_build(op)
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if op2 == None:
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print Vips.error_buffer()
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sys.exit(-1)
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out = op2.props.out
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op2.unref_outputs()
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print 'out.get_format() =', out.get_format()
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print 'out.props.format =', out.props.format
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out.write_to_file("x.v")
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print 'generic call:'
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def required_input(flags):
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enm = Vips.ArgumentFlags
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return flags & enm.INPUT and flags & enm.REQUIRED
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def optional_input(flags):
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enm = Vips.ArgumentFlags
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return flags & enm.INPUT and not flags & enm.REQUIRED
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def required_output(flags):
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enm = Vips.ArgumentFlags
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return flags & enm.OUTPUT and flags & enm.REQUIRED
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def optional_output(flags):
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enm = Vips.ArgumentFlags
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return flags & enm.OUTPUT and not flags & enm.REQUIRED
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def vips_call(name, *required, **optional):
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op = Vips.Operation.new(name)
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# set required input args
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i = 0
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for prop in op.props:
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flags = op.get_argument_flags(prop.name)
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if required_input(flags):
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if i >= len(required):
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print 'too few required args!'
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op.props.__setattr__(prop.name, required[i])
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i += 1
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if i < len(required):
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print 'too many required args!'
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# set optional input args
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for i in optional.keys():
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flags = op.get_argument_flags(i)
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if optional_input(flags):
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op.props.__setattr__(i, optional[i])
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# call
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op2 = Vips.cache_operation_build(op)
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if op2 == None:
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print Vips.error_buffer()
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# gather output args
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out = []
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for prop in op2.props:
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flags = op2.get_argument_flags(prop.name)
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if required_output(flags):
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out.append(op2.props.__getattribute__(prop.name))
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for i in optional.keys():
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flags = op2.get_argument_flags(i)
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if optional_output(flags):
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out.append(op2.props.__getattribute__(i))
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if len(out) == 1:
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out = out[0]
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# unref everything now we have refs to all outputs we want
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op2.unref_outputs()
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return out
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im = vips_call("add", a, b)
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im.write_to_file("x2.v")
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