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62 lines
2.5 KiB
Python
62 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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r_rgb.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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def processInputs(alg, parameters, context, feedback):
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if 'input' in alg.exportedLayers:
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return
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# We need to import all the bands and color tables of the input raster
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alg.loadRasterLayerFromParameter('input', parameters, context, False, None)
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alg.postInputs(context)
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def processCommand(alg, parameters, context, feedback):
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# if the input raster is multiband: export each component directly
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rasterInput = alg.exportedLayers['input']
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raster = alg.parameterAsRasterLayer(parameters, 'input', context)
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for color in ['red', 'green', 'blue']:
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alg.exportedLayers[color] = color + alg.uniqueSuffix
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# If the raster is not multiband, really do r.rgb
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if raster.bandCount() == 1:
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alg.commands.append(" r.rgb input={} red={} green={} blue={} --overwrite".format(
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rasterInput,
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alg.exportedLayers['red'],
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alg.exportedLayers['green'],
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alg.exportedLayers['blue']
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))
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def processOutputs(alg, parameters, context, feedback):
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raster = alg.parameterAsRasterLayer(parameters, 'input', context)
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# if the raster was monoband, export from r.rgb
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for color in ['red', 'green', 'blue']:
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fileName = alg.parameterAsOutputLayer(parameters, color, context)
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if raster.bandCount() == 1:
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grassName = '{}{}'.format(color, alg.uniqueSuffix)
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else:
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grassName = '{}.{}'.format(alg.exportedLayers['input'], color)
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alg.exportRasterLayer(grassName, fileName, True)
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