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32d6275fa3
This eliminates the need to export to a QGIS compatible format after generating a raster output. The SDAT format is the native SAGA format, and it is supported by GDAL, so it is also supported by QGIS. This was not used before, but now we use that to reduce the nuber of steps and provide a better integration. Conversion to other formats is now done by Processing itself, not by the SAGA algorithm. fixes #10735
329 lines
14 KiB
Python
329 lines
14 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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SagaAlgorithm.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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import importlib
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import subprocess
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from PyQt4.QtGui import QIcon
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.ProcessingConfig import ProcessingConfig
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from processing.core.ProcessingLog import ProcessingLog
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from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
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from processing.core.parameters import getParameterFromString, ParameterExtent, ParameterRaster, ParameterVector, ParameterTable, ParameterMultipleInput, ParameterBoolean, ParameterFixedTable, ParameterNumber, ParameterSelection
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from processing.core.outputs import getOutputFromString, OutputTable, OutputVector, OutputRaster
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import SagaUtils
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from SagaGroupNameDecorator import SagaGroupNameDecorator
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from processing.tools import dataobjects
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from processing.tools.system import getTempFilename, isWindows, getTempFilenameInTempFolder
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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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sessionExportedLayers = {}
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class SagaAlgorithm212(GeoAlgorithm):
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OUTPUT_EXTENT = 'OUTPUT_EXTENT'
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def __init__(self, descriptionfile):
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GeoAlgorithm.__init__(self)
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self.hardcodedStrings = []
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self.allowUnmatchingGridExtents = False
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self.descriptionFile = descriptionfile
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self.defineCharacteristicsFromFile()
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def getCopy(self):
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newone = SagaAlgorithm212(self.descriptionFile)
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newone.provider = self.provider
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return newone
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def getIcon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'saga.png'))
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def defineCharacteristicsFromFile(self):
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lines = open(self.descriptionFile)
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line = lines.readline().strip('\n').strip()
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self.name = line
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if '|' in self.name:
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tokens = self.name.split('|')
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self.name = tokens[0]
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self.cmdname = tokens[1]
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else:
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self.cmdname = self.name
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self.name = self.name[0].upper() + self.name[1:].lower()
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line = lines.readline().strip('\n').strip()
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self.undecoratedGroup = line
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self.group = SagaGroupNameDecorator.getDecoratedName(self.undecoratedGroup)
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line = lines.readline().strip('\n').strip()
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while line != '':
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if line.startswith('Hardcoded'):
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self.hardcodedStrings.append(line[len('Harcoded|') + 1:])
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elif line.startswith('Parameter'):
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self.addParameter(getParameterFromString(line))
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elif line.startswith('AllowUnmatching'):
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self.allowUnmatchingGridExtents = True
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elif line.startswith('Extent'):
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# An extent parameter that wraps 4 SAGA numerical parameters
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self.extentParamNames = line[6:].strip().split(' ')
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self.addParameter(ParameterExtent(self.OUTPUT_EXTENT,
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'Output extent', '0,1,0,1'))
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else:
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self.addOutput(getOutputFromString(line))
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line = lines.readline().strip('\n').strip()
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lines.close()
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def processAlgorithm(self, progress):
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commands = list()
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self.exportedLayers = {}
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self.preProcessInputs()
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# 1: Export rasters to sgrd and vectors to shp
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# Tables must be in dbf format. We check that.
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for param in self.parameters:
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if isinstance(param, ParameterRaster):
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if param.value is None:
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continue
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value = param.value
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if not value.endswith('sgrd'):
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exportCommand = self.exportRasterLayer(value)
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if exportCommand is not None:
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commands.append(exportCommand)
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if isinstance(param, ParameterVector):
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if param.value is None:
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continue
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layer = dataobjects.getObjectFromUri(param.value, False)
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if layer:
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filename = dataobjects.exportVectorLayer(layer)
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self.exportedLayers[param.value] = filename
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elif not param.value.endswith('shp'):
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raise GeoAlgorithmExecutionException(
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self.tr('Unsupported file format'))
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if isinstance(param, ParameterTable):
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if param.value is None:
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continue
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table = dataobjects.getObjectFromUri(param.value, False)
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if table:
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filename = dataobjects.exportTable(table)
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self.exportedLayers[param.value] = filename
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elif not param.value.endswith('shp'):
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raise GeoAlgorithmExecutionException(
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self.tr('Unsupported file format'))
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if isinstance(param, ParameterMultipleInput):
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if param.value is None:
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continue
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layers = param.value.split(';')
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if layers is None or len(layers) == 0:
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continue
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if param.datatype == ParameterMultipleInput.TYPE_RASTER:
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for layerfile in layers:
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if not layerfile.endswith('sgrd'):
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exportCommand = self.exportRasterLayer(layerfile)
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if exportCommand is not None:
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commands.append(exportCommand)
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elif param.datatype == ParameterMultipleInput.TYPE_VECTOR_ANY:
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for layerfile in layers:
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layer = dataobjects.getObjectFromUri(layerfile, False)
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if layer:
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filename = dataobjects.exportVectorLayer(layer)
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self.exportedLayers[layerfile] = filename
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elif not layerfile.endswith('shp'):
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raise GeoAlgorithmExecutionException(
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self.tr('Unsupported file format'))
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# 2: Set parameters and outputs
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command = self.undecoratedGroup + ' "' + self.cmdname + '"'
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if self.hardcodedStrings:
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for s in self.hardcodedStrings:
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command += ' ' + s
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for param in self.parameters:
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if param.value is None:
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continue
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if isinstance(param, (ParameterRaster, ParameterVector,
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ParameterTable)):
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value = param.value
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if value in self.exportedLayers.keys():
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command += ' -' + param.name + ' "' \
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+ self.exportedLayers[value] + '"'
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else:
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command += ' -' + param.name + ' "' + value + '"'
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elif isinstance(param, ParameterMultipleInput):
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s = param.value
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for layer in self.exportedLayers.keys():
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s = s.replace(layer, self.exportedLayers[layer])
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command += ' -' + param.name + ' "' + s + '"'
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elif isinstance(param, ParameterBoolean):
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if param.value:
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command += ' -' + param.name
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elif isinstance(param, ParameterFixedTable):
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tempTableFile = getTempFilename('txt')
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f = open(tempTableFile, 'w')
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f.write('\t'.join([col for col in param.cols]) + '\n')
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values = param.value.split(',')
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for i in range(0, len(values), 3):
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s = values[i] + '\t' + values[i + 1] + '\t' + values[i
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+ 2] + '\n'
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f.write(s)
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f.close()
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command += ' -' + param.name + ' "' + tempTableFile + '"'
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elif isinstance(param, ParameterExtent):
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# 'We have to substract/add half cell size, since SAGA is
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# center based, not corner based
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halfcell = self.getOutputCellsize() / 2
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offset = [halfcell, -halfcell, halfcell, -halfcell]
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values = param.value.split(',')
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for i in range(4):
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command += ' -' + self.extentParamNames[i] + ' ' \
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+ str(float(values[i]) + offset[i])
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elif isinstance(param, (ParameterNumber, ParameterSelection)):
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command += ' -' + param.name + ' ' + str(param.value)
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else:
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command += ' -' + param.name + ' "' + str(param.value) + '"'
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for out in self.outputs:
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command += ' -' + out.name + ' "' + out.getCompatibleFileName(self) + '"'
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commands.append(command)
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# special treatment for RGB algorithm
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#TODO: improve this and put this code somewhere else
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for out in self.outputs:
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if isinstance(out, OutputRaster):
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filename = out.getCompatibleFileName(self)
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filename2 = filename + '.sgrd'
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if self.cmdname == 'RGB Composite':
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commands.append('io_grid_image 0 -IS_RGB -GRID:"' + filename2
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+ '" -FILE:"' + filename
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+ '"')
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# 3: Run SAGA
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commands = self.editCommands(commands)
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SagaUtils.createSagaBatchJobFileFromSagaCommands(commands)
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loglines = []
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loglines.append(self.tr('SAGA execution commands'))
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for line in commands:
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progress.setCommand(line)
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loglines.append(line)
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if ProcessingConfig.getSetting(SagaUtils.SAGA_LOG_COMMANDS):
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ProcessingLog.addToLog(ProcessingLog.LOG_INFO, loglines)
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SagaUtils.executeSaga(progress)
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def preProcessInputs(self):
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name = self.commandLineName().replace('.', '_')[len('saga:'):]
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try:
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module = importlib.import_module('processing.algs.saga.ext.' + name)
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except ImportError:
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return
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if hasattr(module, 'preProcessInputs'):
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func = getattr(module, 'preProcessInputs')
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func(self)
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def editCommands(self, commands):
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name = self.commandLineName()[len('saga:'):]
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try:
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module = importlib.import_module('processing.algs.saga.ext.' + name)
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except ImportError:
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return commands
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if hasattr(module, 'editCommands'):
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func = getattr(module, 'editCommands')
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return func(commands)
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else:
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return commands
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def getOutputCellsize(self):
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"""Tries to guess the cellsize of the output, searching for
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a parameter with an appropriate name for it.
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"""
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cellsize = 0
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for param in self.parameters:
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if param.value is not None and param.name == 'USER_SIZE':
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cellsize = float(param.value)
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break
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return cellsize
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def exportRasterLayer(self, source):
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global sessionExportedLayers
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if source in sessionExportedLayers:
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exportedLayer = sessionExportedLayers[source]
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if os.path.exists(exportedLayer):
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self.exportedLayers[source] = exportedLayer
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return None
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else:
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del sessionExportedLayers[source]
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layer = dataobjects.getObjectFromUri(source, False)
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if layer:
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filename = str(layer.name())
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else:
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filename = os.path.basename(source)
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validChars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789:'
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filename = ''.join(c for c in filename if c in validChars)
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if len(filename) == 0:
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filename = 'layer'
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destFilename = getTempFilenameInTempFolder(filename + '.sgrd')
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self.exportedLayers[source] = destFilename
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sessionExportedLayers[source] = destFilename
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return 'io_gdal 0 -TRANSFORM -INTERPOL 0 -GRIDS "' + destFilename + '" -FILES "' + source + '"'
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def checkParameterValuesBeforeExecuting(self):
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"""
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We check that there are no multiband layers, which are not
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supported by SAGA, and that raster layers have the same grid extent
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"""
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extent = None
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for param in self.parameters:
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files = []
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if isinstance(param, ParameterRaster):
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files = [param.value]
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elif (isinstance(param, ParameterMultipleInput) and
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param.datatype == ParameterMultipleInput.TYPE_RASTER):
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if param.value is not None:
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files = param.value.split(";")
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for f in files:
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layer = dataobjects.getObjectFromUri(f)
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if layer is None:
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continue
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if layer.bandCount() > 1:
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return self.tr('Input layer %s has more than one band.\n'
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'Multiband layers are not supported by SAGA' % str(layer.name()))
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if not self.allowUnmatchingGridExtents:
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if extent is None:
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extent = (layer.extent(), layer.height(), layer.width())
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else:
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extent2 = (layer.extent(), layer.height(), layer.width())
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if extent != extent2:
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return self.tr("Input layers do not have the same grid extent.")
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