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"""
***************************************************************************
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"
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"
EXTRA = "EXTRA"
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"),
1,
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 options"),
defaultValue="",
optional=True,
)
options_param.setFlags(
options_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
)
options_param.setMetadata({"widget_wrapper": {"widget_type": "rasteroptions"}})
self.addParameter(options_param)
extra_param = QgsProcessingParameterString(
self.EXTRA,
self.tr("Additional command-line parameters"),
defaultValue=None,
optional=True,
)
extra_param.setFlags(
extra_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
)
self.addParameter(extra_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)
)
input_details = GdalUtils.gdal_connection_details_from_layer(inLayer)
arguments.append(input_details.connection_string)
arguments.append(self.parameterAsFile(parameters, self.COLOR_TABLE, context))
out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
self.setOutputValue(self.OUTPUT, out)
arguments.append(out)
output_format = QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1])
if not output_format:
raise QgsProcessingException(self.tr("Output format is invalid"))
arguments.append("-of")
arguments.append(output_format)
arguments.append("-b")
arguments.append(str(self.parameterAsInt(parameters, self.BAND, context)))
if self.parameterAsBoolean(parameters, self.COMPUTE_EDGES, context):
arguments.append("-compute_edges")
mode = self.modes[self.parameterAsEnum(parameters, self.MATCH_MODE, context)][1]
if mode != "":
arguments.append(mode)
options = self.parameterAsString(parameters, self.OPTIONS, context)
if options:
arguments.extend(GdalUtils.parseCreationOptions(options))
if input_details.credential_options:
arguments.extend(input_details.credential_options_as_arguments())
if self.EXTRA in parameters and parameters[self.EXTRA] not in (None, ""):
extra = self.parameterAsString(parameters, self.EXTRA, context)
arguments.append(extra)
return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
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