39 lines
981 B
Python
39 lines
981 B
Python
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import imageop
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error = 'imgconv.error'
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LOSSY = 1
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NOT_LOSSY = 0
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def null(img, x, y):
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return img
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def mono2grey(img, x, y):
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imageop.mono2grey(img, x, y, 0, 255)
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converters = [ \
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('grey', 'grey4', imageop.grey2grey4, LOSSY), \
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('grey', 'grey2', imageop.dither2grey2, LOSSY), \
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('grey', 'mono', imageop.dither2mono, LOSSY), \
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('mono', 'grey', mono2grey, NOT_LOSSY), \
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('grey2', 'grey', imageop.grey22grey, NOT_LOSSY), \
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('grey4', 'grey', imageop.grey42grey, NOT_LOSSY), \
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]
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def addconverter(fcs, tcs, lossy, func):
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for i in range(len(converters)):
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ifcs, itcs, irtn, ilossy = converters[i]
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if (fcs, tcs) == (ifcs, itcs):
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converters[i] = (fcs, tcs, func, lossy)
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return
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converters.append((fcs,tcs,lossy,func))
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def getconverter(fcs, tcs):
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if fcs == tcs: return null
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for ifcs, itcs, irtn, ilossy in converters:
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if (fcs, tcs) == (ifcs, itcs):
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return irtn
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raise error, 'Sorry, that conversion is not implemented'
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