diff options
| -rwxr-xr-x | Demo/sgi/video/imgconv.py | 84 |
1 files changed, 81 insertions, 3 deletions
diff --git a/Demo/sgi/video/imgconv.py b/Demo/sgi/video/imgconv.py index a3a5d19..3990ae1 100755 --- a/Demo/sgi/video/imgconv.py +++ b/Demo/sgi/video/imgconv.py @@ -18,8 +18,14 @@ converters = [ \ ('mono', 'grey', mono2grey, NOT_LOSSY), \ ('grey2', 'grey', imageop.grey22grey, NOT_LOSSY), \ ('grey4', 'grey', imageop.grey42grey, NOT_LOSSY), \ + ('rgb', 'rgb8', imageop.rgb2rgb8, LOSSY), \ + ('rgb8', 'rgb', imageop.rgb82rgb, NOT_LOSSY), \ + ('rgb', 'grey', imageop.rgb2grey, LOSSY), \ + ('grey', 'rgb', imageop.grey2rgb, NOT_LOSSY) \ ] +built = {} + def addconverter(fcs, tcs, lossy, func): for i in range(len(converters)): ifcs, itcs, irtn, ilossy = converters[i] @@ -29,10 +35,82 @@ def addconverter(fcs, tcs, lossy, func): converters.append((fcs,tcs,lossy,func)) def getconverter(fcs, tcs): + # + # If formats are the same return the dummy converter + # if fcs == tcs: return null - + # + # Otherwise, if we have a converter return that one + # for ifcs, itcs, irtn, ilossy in converters: if (fcs, tcs) == (ifcs, itcs): return irtn - raise error, 'Sorry, that conversion is not implemented' - + # + # Finally, we try to create a converter + # + if not built.has_key(fcs): + built[fcs] = enumerate_converters(fcs) + if not built[fcs].has_key(tcs): + raise error, 'Sorry, conversion from '+fcs+' to '+tcs+ \ + ' is not implemented' + if len(built[fcs][tcs]) == 3: + # + # Converter not instantiated yet + # + built[fcs][tcs].append(instantiate_converter(built[fcs][tcs])) + cf = built[fcs][tcs][3] + return cf + +def enumerate_converters(fcs): + cvs = {} + formats = [fcs] + steps = 0 + while 1: + workdone = 0 + for ifcs, itcs, irtn, ilossy in converters: + if ifcs == fcs: + template = [ilossy, 1, [irtn]] + elif cvs.has_key(ifcs): + template = cvs[ifcs][:] + template[2] = template[2][:] + if ilossy: + template[0] = ilossy + template[1] = template[1] + 1 + template[2].append(irtn) + else: + continue + if not cvs.has_key(itcs): + cvs[itcs] = template + workdone = 1 + else: + previous = cvs[itcs] + if template < previous: + cvs[itcs] = template + workdone = 1 + if not workdone: + break + steps = steps + 1 + if steps > len(converters): + print '------------------loop in emunerate_converters--------' + print 'CONVERTERS:' + print converters + print 'RESULTS:' + print cvs + raise error, 'Internal error - loop' + return cvs + +def instantiate_converter(args): + list = args[2] + cl = RtConverters().init(list) + args.append(cl.convert) + return args + +class RtConverters(): + def init(self, list): + self.list = list + return self + + def convert(self, img, w, h): + for cv in self.list: + img = cv(img, w, h) + return img |