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81 lines
3.0 KiB
Python
81 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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r_shade.py
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----------
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Date : February 2016
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Copyright : (C) 2016 by Médéric Ribreux
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Email : medspx at medspx dot fr
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Médéric Ribreux'
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__date__ = 'February 2016'
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__copyright__ = '(C) 2016, Médéric Ribreux'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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def checkParameterValuesBeforeExecuting(alg):
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""" Verify if we have the right parameters """
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if alg.getParameterValue('brighten') and alg.getParameterValue('bgcolor'):
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return alg.tr("You need to set either a brighten percentage or a NULL color!")
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return None
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def processInputs(alg):
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# We need to import all the bands and color tables of the input rasters
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shade = alg.getParameterValue('shade')
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color = alg.getParameterValue('color')
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if color in alg.exportedLayers.keys():
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return
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for raster, method in (shade, 'r.external'), (color, 'r.in.gdal'):
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alg.setSessionProjectionFromLayer(raster, alg.commands)
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destFilename = alg.getTempFilename()
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alg.exportedLayers[raster] = destFilename
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command = '{} input={} output={} --overwrite -o'.format(method, raster, destFilename)
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alg.commands.append(command)
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alg.setSessionProjectionFromProject(alg.commands)
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region = unicode(alg.getParameterValue(alg.GRASS_REGION_EXTENT_PARAMETER))
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regionCoords = region.split(',')
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command = 'g.region'
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command += ' -a'
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command += ' n=' + unicode(regionCoords[3])
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command += ' s=' + unicode(regionCoords[2])
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command += ' e=' + unicode(regionCoords[1])
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command += ' w=' + unicode(regionCoords[0])
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cellsize = alg.getParameterValue(alg.GRASS_REGION_CELLSIZE_PARAMETER)
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if cellsize:
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command += ' res=' + unicode(cellsize)
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else:
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command += ' res=' + unicode(alg.getDefaultCellsize())
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alignToResolution = alg.getParameterValue(alg.GRASS_REGION_ALIGN_TO_RESOLUTION)
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if alignToResolution:
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command += ' -a'
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alg.commands.append(command)
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def processOutputs(alg):
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# Keep color table ?
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output = alg.getOutputValue(u'output')
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command = u"r.out.gdal -t createopt=\"TFW=YES,COMPRESS=LZW\" input={} output=\"{}\" --overwrite".format(
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alg.exportedLayers[output],
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output
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)
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alg.commands.append(command)
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alg.outputCommands.append(command)
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