QGIS/python/plugins/processing/algs/gdal/rgb2pct.py

# -*- coding: utf-8 -*-

"""
***************************************************************************
    rgb2pct.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 by Victor Olaya
    Email                : volayaf at gmail dot com
***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os

from PyQt4.QtGui import QIcon

from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterNumber
from processing.core.outputs import OutputRaster
from processing.tools.system import isWindows
from processing.algs.gdal.GdalUtils import GdalUtils

pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]


class rgb2pct(GdalAlgorithm):

    INPUT = 'INPUT'
    OUTPUT = 'OUTPUT'
    NCOLORS = 'NCOLORS'

    def getIcon(self):
        return QIcon(os.path.join(pluginPath, 'images', 'gdaltools', '24-to-8-bits.png'))

    def defineCharacteristics(self):
        self.name, self.i18n_name = self.trAlgorithm('RGB to PCT')
        self.group, self.i18n_group = self.trAlgorithm('[GDAL] Conversion')
        self.addParameter(ParameterRaster(rgb2pct.INPUT,
                                          self.tr('Input layer'), False))
        self.addParameter(ParameterNumber(rgb2pct.NCOLORS,
                                          self.tr('Number of colors'), 1, None, 2))
        self.addOutput(OutputRaster(rgb2pct.OUTPUT, self.tr('RGB to PCT')))

    def getConsoleCommands(self):
        arguments = []
        arguments.append('-n')
        arguments.append(unicode(self.getParameterValue(rgb2pct.NCOLORS)))
        arguments.append('-of')
        out = self.getOutputValue(rgb2pct.OUTPUT)
        arguments.append(GdalUtils.getFormatShortNameFromFilename(out))
        arguments.append(self.getParameterValue(rgb2pct.INPUT))
        arguments.append(out)

        if isWindows():
            commands = ['cmd.exe', '/C ', 'rgb2pct.bat',
                        GdalUtils.escapeAndJoin(arguments)]
        else:
            commands = ['rgb2pct.py', GdalUtils.escapeAndJoin(arguments)]

        return commands