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"""
***************************************************************************
rearrange_bands.py
---------------------
Date : August 2018
Copyright : (C) 2018 by Mathieu Pellerin
Email : nirvn dot asia 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__ = "Mathieu Pellerin"
__date__ = "August 2018"
__copyright__ = "(C) 2018, Mathieu Pellerin"
import os
from qgis.PyQt.QtGui import QIcon
from qgis.core import (
QgsRasterFileWriter,
QgsProcessingException,
QgsProcessingParameterEnum,
QgsProcessingParameterDefinition,
QgsProcessingParameterRasterLayer,
QgsProcessingParameterBand,
QgsProcessingParameterString,
QgsProcessingParameterRasterDestination,
)
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.algs.gdal.GdalUtils import GdalUtils
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
class rearrange_bands(GdalAlgorithm):
INPUT = "INPUT"
BANDS = "BANDS"
OPTIONS = "OPTIONS"
DATA_TYPE = "DATA_TYPE"
OUTPUT = "OUTPUT"
def __init__(self):
super().__init__()
def initAlgorithm(self, config=None):
self.TYPES = [
self.tr("Use Input Layer Data Type"),
"Byte",
"Int16",
"UInt16",
"UInt32",
"Int32",
"Float32",
"Float64",
"CInt16",
"CInt32",
"CFloat32",
"CFloat64",
"Int8",
]
self.addParameter(
QgsProcessingParameterRasterLayer(self.INPUT, self.tr("Input layer"))
)
self.addParameter(
QgsProcessingParameterBand(
self.BANDS,
self.tr("Selected band(s)"),
None,
self.INPUT,
allowMultiple=True,
)
)
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)
dataType_param = QgsProcessingParameterEnum(
self.DATA_TYPE,
self.tr("Output data type"),
self.TYPES,
allowMultiple=False,
defaultValue=0,
)
dataType_param.setFlags(
dataType_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
)
self.addParameter(dataType_param)
self.addParameter(
QgsProcessingParameterRasterDestination(self.OUTPUT, self.tr("Converted"))
)
def name(self):
return "rearrange_bands"
def displayName(self):
return self.tr("Rearrange bands")
def group(self):
return self.tr("Raster conversion")
def groupId(self):
return "rasterconversion"
def icon(self):
return QIcon(os.path.join(pluginPath, "images", "gdaltools", "translate.png"))
def shortHelpString(self):
return self.tr(
"This algorithm creates a new raster using selected band(s) from a given raster layer.\n\n"
"The algorithm also makes it possible to reorder the bands for the newly-created raster."
)
def commandName(self):
return "gdal_translate"
def getConsoleCommands(self, parameters, context, feedback, executing=True):
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)
out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
self.setOutputValue(self.OUTPUT, out)
bands = self.parameterAsInts(parameters, self.BANDS, context)
arguments = [f"-b {band}" for band in bands]
data_type = self.parameterAsEnum(parameters, self.DATA_TYPE, context)
if data_type:
if self.TYPES[data_type] == "Int8" and GdalUtils.version() < 3070000:
raise QgsProcessingException(
self.tr("Int8 data type requires GDAL version 3.7 or later")
)
arguments.append("-ot " + self.TYPES[data_type])
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)
options = self.parameterAsString(parameters, self.OPTIONS, context)
if options:
arguments.extend(GdalUtils.parseCreationOptions(options))
arguments.append(input_details.connection_string)
arguments.append(out)
if input_details.open_options:
arguments.extend(input_details.open_options_as_arguments())
if input_details.credential_options:
arguments.extend(input_details.credential_options_as_arguments())
return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
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