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46 lines
1.1 KiB
Python
46 lines
1.1 KiB
Python
'''
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A really quick and dirty hack to extend PixMapWrapper
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They are mere copies of the toImage and fromImage methods.
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Riccardo Trocca (rtrocca@libero.it)
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'''
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from PixMapWrapper import *
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import Numeric
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class ExtPixMapWrapper(PixMapWrapper):
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def toNumeric(self):
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data = self.tostring()[1:] + chr(0)
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bounds = self.bounds
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tmp=Numeric.fromstring(data,Numeric.UnsignedInt8)
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#tmp.shape=(bounds[3]-bounds[1],bounds[2]-bounds[0],4)
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tmp.shape=(bounds[2]-bounds[0],bounds[3]-bounds[1],4)
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return Numeric.transpose(tmp,(1,0,2))
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def fromNumeric(self,num):
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s=num.shape
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x=num.shape[1]
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y=num.shape[0]
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#bands=1 Greyscale image
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#bands=3 RGB image
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#bands=4 RGBA image
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if len(s)==2:
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bands=1
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num=Numeric.resize(num,(y,x,1))
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else:
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bands=num.shape[2]
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if bands==1:
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num=Numeric.concatenate((num,num,num),2)
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bands=3
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if bands==3:
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alpha=Numeric.ones((y,x))*255
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alpha.shape=(y,x,1)
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num=Numeric.concatenate((num,alpha),2)
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data=chr(0)+Numeric.transpose(num,(1,0,2)).astype(Numeric.UnsignedInt8).tostring()
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PixMapWrapper.fromstring(self,data,x,y)
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