1 | # -*- coding: UTF-8 -*- |
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2 | # |
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3 | # PyKota : Print Quotas for CUPS |
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4 | # |
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5 | # (c) 2003, 2004, 2005, 2006, 2007, 2008 Jerome Alet <alet@librelogiciel.com> |
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6 | # This program is free software: you can redistribute it and/or modify |
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7 | # it under the terms of the GNU General Public License as published by |
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8 | # the Free Software Foundation, either version 3 of the License, or |
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9 | # (at your option) any later version. |
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10 | # |
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11 | # This program is distributed in the hope that it will be useful, |
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12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | # GNU General Public License for more details. |
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15 | # |
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16 | # You should have received a copy of the GNU General Public License |
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17 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 | # |
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19 | # $Id$ |
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20 | # |
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21 | # |
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22 | |
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23 | """This module handles ink accounting in PyKota.""" |
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24 | |
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25 | import os |
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26 | |
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27 | from pykota.errors import PyKotaAccounterError |
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28 | from pykota.accounter import AccounterBase |
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29 | |
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30 | class Accounter(AccounterBase) : |
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31 | cspaceExpanded = { |
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32 | "CMYK" : { "C" : "cyan", "M" : "magenta", "Y" : "yellow", "K" : "black" } , |
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33 | "CMY" : { "C" : "cyan", "M" : "magenta", "Y" : "yellow" } , |
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34 | "RGB" : { "R" : "red", "G" : "green", "B" : "blue" } , |
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35 | "BW" : { "B" : "black", "W" : "white" } , |
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36 | "GC" : { "G" : "grayscale", "C" : "colored" } , |
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37 | } |
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38 | def computeJobSize(self) : |
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39 | """Do ink accounting for a print job.""" |
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40 | if (not self.isPreAccounter) and \ |
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41 | (self.filter.accounter.arguments == self.filter.preaccounter.arguments) : |
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42 | # if precomputing has been done and both accounter and preaccounter are |
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43 | # configured the same, no need to launch a second pass since we already |
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44 | # know the result. |
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45 | self.filter.logdebug("Precomputing pass told us that job is %s pages long." % self.filter.softwareJobSize) |
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46 | self.inkUsage = self.filter.preaccounter.inkUsage # Optimize : already computed ! |
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47 | return self.filter.softwareJobSize # Optimize : already computed ! |
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48 | |
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49 | parameters = [p.strip() for p in self.arguments.split(',')] |
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50 | if len(parameters) == 1 : |
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51 | parameters.append("72") |
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52 | (colorspace, resolution) = parameters |
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53 | colorspace = colorspace.lower() |
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54 | if colorspace not in ("cmyk", "bw", "cmy", "rgb", "gc") : |
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55 | raise PyKotaAccounterError, _("Invalid parameters for ink accounter : [%s]") % self.arguments |
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56 | |
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57 | try : |
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58 | resolution = int(resolution) |
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59 | except ValueError : |
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60 | raise PyKotaAccounterError, "Invalid parameters for ink accounter : [%s]" % self.arguments |
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61 | |
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62 | self.filter.logdebug("Using internal parser to compute job's size and ink usage.") |
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63 | |
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64 | jobsize = 0 |
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65 | if self.filter.JobSizeBytes : |
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66 | try : |
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67 | from pkpgpdls import analyzer, pdlparser |
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68 | except ImportError : |
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69 | self.filter.printInfo("pkpgcounter is now distributed separately, please grab it from http://www.pykota.com/software/pkpgcounter", "error") |
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70 | self.filter.printInfo("Precomputed job size will be forced to 0 pages.", "error") |
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71 | else : |
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72 | options = analyzer.AnalyzerOptions(colorspace=colorspace, resolution=resolution) |
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73 | try : |
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74 | parser = analyzer.PDLAnalyzer(self.filter.DataFile, options) |
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75 | (cspace, pages) = parser.getInkCoverage() |
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76 | except pdlparser.PDLParserError, msg : |
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77 | # Here we just log the failure, but |
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78 | # we finally ignore it and return 0 since this |
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79 | # computation is just an indication of what the |
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80 | # job's size MAY be. |
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81 | self.filter.printInfo(_("Unable to precompute the job's size and ink coverage with the generic PDL analyzer : %s") % msg, "warn") |
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82 | else : |
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83 | cspacelabels = self.cspaceExpanded[cspace] |
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84 | for page in pages : |
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85 | colordict = {} |
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86 | for color in page.keys() : |
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87 | colordict[cspacelabels[color]] = page[color] |
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88 | self.inkUsage.append(colordict) |
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89 | jobsize = len(pages) |
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90 | try : |
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91 | if self.filter.Ticket.FileName is not None : |
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92 | # when a filename is passed as an argument, the backend |
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93 | # must generate the correct number of copies. |
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94 | jobsize *= self.filter.Ticket.Copies |
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95 | self.inkUsage *= self.filter.Ticket.Copies |
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96 | except AttributeError : # When not run from the cupspykota backend |
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97 | pass |
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98 | self.filter.logdebug("Ink usage : %s ===> %s" % (cspace, repr(self.inkUsage))) |
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99 | return jobsize |
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