| 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) 2003-2013 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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