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97 lines
3.7 KiB
Python
97 lines
3.7 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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SplitRGBBands.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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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__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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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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import os
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from qgis.core import (QgsProcessingParameterRasterLayer,
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QgsProcessingParameterRasterDestination)
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from processing.tools.system import getTempFilename
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from . import SagaUtils
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from .SagaAlgorithmBase import SagaAlgorithmBase
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pluginPath = os.path.normpath(os.path.join(
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os.path.split(os.path.dirname(__file__))[0], os.pardir))
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class SplitRGBBands(SagaAlgorithmBase):
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INPUT = 'INPUT'
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R = 'R'
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G = 'G'
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B = 'B'
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def __init__(self):
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super().__init__()
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def initAlgorithm(self, config=None):
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self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT, self.tr('Input layer')))
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self.addParameter(QgsProcessingParameterRasterDestination(self.R, self.tr('Output R band layer')))
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self.addParameter(QgsProcessingParameterRasterDestination(self.G, self.tr('Output G band layer')))
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self.addParameter(QgsProcessingParameterRasterDestination(self.B, self.tr('Output B band layer')))
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def name(self):
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return 'splitrgbbands'
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def displayName(self):
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return self.tr('Split RGB bands')
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def group(self):
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return self.tr('Image tools')
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def processAlgorithm(self, parameters, context, feedback):
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# TODO: check correct num of bands
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inLayer = self.parameterAsRasterLayer(parameters, self.INPUT, context)
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input = inLayer.source()
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temp = getTempFilename(None).replace('.', '')
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basename = os.path.basename(temp)
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validChars = \
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'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
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safeBasename = ''.join(c for c in basename if c in validChars)
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temp = os.path.join(os.path.dirname(temp), safeBasename)
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r = self.parameterAsOutputLayer(parameters, self.R, context)
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g = self.parameterAsOutputLayer(parameters, self.G, context)
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b = self.parameterAsOutputLayer(parameters, self.B, context)
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commands = []
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version = SagaUtils.getInstalledVersion(True)
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trailing = ""
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lib = ""
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commands.append('%sio_gdal 0 -GRIDS "%s" -FILES "%s"' % (lib, temp, input)
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)
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commands.append('%sio_gdal 1 -GRIDS "%s_%s1.sgrd" -FORMAT 1 -TYPE 0 -FILE "%s"' % (lib, temp, trailing, r)
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)
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commands.append('%sio_gdal 1 -GRIDS "%s_%s2.sgrd" -FORMAT 1 -TYPE 0 -FILE "%s"' % (lib, temp, trailing, g)
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)
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commands.append('%sio_gdal 1 -GRIDS "%s_%s3.sgrd" -FORMAT 1 -TYPE 0 -FILE "%s"' % (lib, temp, trailing, b)
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)
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SagaUtils.createSagaBatchJobFileFromSagaCommands(commands)
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SagaUtils.executeSaga(feedback)
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return {self.R: r, self.G: g, self.B: b}
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