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