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ColorRelief.py
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ColorRelief.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
ColorRelief.py
---------------------
Date : October 2013
Copyright : (C) 2013 by Alexander Bruy
Email : alexander dot bruy 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__ = 'Alexander Bruy'
__date__ = 'October 2013'
__copyright__ = '(C) 2013, Alexander Bruy'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
from qgis.core import (QgsRasterFileWriter,
QgsProcessingException,
QgsProcessingParameterDefinition,
QgsProcessingParameterRasterLayer,
QgsProcessingParameterBand,
QgsProcessingParameterBoolean,
QgsProcessingParameterEnum,
QgsProcessingParameterFile,
QgsProcessingParameterString,
QgsProcessingParameterRasterDestination)
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.algs.gdal.GdalUtils import GdalUtils
class ColorRelief(GdalAlgorithm):
INPUT = 'INPUT'
BAND = 'BAND'
COMPUTE_EDGES = 'COMPUTE_EDGES'
COLOR_TABLE = 'COLOR_TABLE'
MATCH_MODE = 'MATCH_MODE'
OPTIONS = 'OPTIONS'
OUTPUT = 'OUTPUT'
def __init__(self):
super().__init__()
def initAlgorithm(self, config=None):
self.modes = ((self.tr('Use strict color matching'), '-exact_color_entry'),
(self.tr('Use closest RGBA quadruplet'), '-nearest_color_entry'),
(self.tr('Use smoothly blended colors'), ''))
self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT,
self.tr('Input layer')))
self.addParameter(QgsProcessingParameterBand(self.BAND,
self.tr('Band number'),
parentLayerParameterName=self.INPUT))
self.addParameter(QgsProcessingParameterBoolean(self.COMPUTE_EDGES,
self.tr('Compute edges'),
defaultValue=False))
self.addParameter(QgsProcessingParameterFile(self.COLOR_TABLE,
self.tr('Color configuration file')))
self.addParameter(QgsProcessingParameterEnum(self.MATCH_MODE,
self.tr('Matching mode'),
options=[i[0] for i in self.modes],
defaultValue=2))
options_param = QgsProcessingParameterString(self.OPTIONS,
self.tr('Additional creation parameters'),
defaultValue='',
optional=True)
options_param.setFlags(options_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
options_param.setMetadata({
'widget_wrapper': {
'class': 'processing.algs.gdal.ui.RasterOptionsWidget.RasterOptionsWidgetWrapper'}})
self.addParameter(options_param)
self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT, self.tr('Color relief')))
def name(self):
return 'colorrelief'
def displayName(self):
return self.tr('Color relief')
def group(self):
return self.tr('Raster analysis')
def groupId(self):
return 'rasteranalysis'
def commandName(self):
return 'gdaldem'
def getConsoleCommands(self, parameters, context, feedback, executing=True):
arguments = ['color-relief']
inLayer = self.parameterAsRasterLayer(parameters, self.INPUT, context)
if inLayer is None:
raise QgsProcessingException(self.invalidRasterError(parameters, self.INPUT))
arguments.append(inLayer.source())
arguments.append(self.parameterAsFile(parameters, self.COLOR_TABLE, context))
out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
arguments.append(out)
arguments.append('-of')
arguments.append(QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1]))
arguments.append('-b')
arguments.append(str(self.parameterAsInt(parameters, self.BAND, context)))
if self.parameterAsBool(parameters, self.COMPUTE_EDGES, context):
arguments.append('-compute_edges')
arguments.append(self.modes[self.parameterAsEnum(parameters, self.MATCH_MODE, context)][1])
return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]