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[processing] add optional EXTRA parameter to gdalwarp algorithm (fix #20721)

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This allows users to pass additional command-line arguments which are
not exposed in the algorithm definition. The most frequent use case is
enabling transparency and adding nodata values.
This commit is contained in:
Alexander Bruy 2019-01-21 20:26:00 +02:00 committed by Nyall Dawson
parent 1253707337
commit bb2c3663b0
2 changed files with 50 additions and 0 deletions
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13
python/plugins/processing/algs/gdal/warp.py
View File

@ -38,6 +38,7 @@ from qgis.core import (QgsRasterFileWriter,
QgsProcessingParameterEnum,
QgsProcessingParameterBoolean,
QgsProcessingParameterExtent,
QgsProcessingParameterString,
QgsProcessingParameterRasterDestination,
QgsProcessingUtils)
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
@ -59,6 +60,7 @@ class warp(GdalAlgorithm):
TARGET_EXTENT = 'TARGET_EXTENT'
TARGET_EXTENT_CRS = 'TARGET_EXTENT_CRS'
MULTITHREADING = 'MULTITHREADING'
EXTRA = 'EXTRA'
OUTPUT = 'OUTPUT'
TYPES = ['Use input layer data type', 'Byte', 'Int16', 'UInt16', 'UInt32', 'Int32', 'Float32', 'Float64', 'CInt16', 'CInt32', 'CFloat32', 'CFloat64']
@ -139,6 +141,13 @@ class warp(GdalAlgorithm):
multithreading_param.setFlags(multithreading_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(multithreading_param)
extra_param = QgsProcessingParameterBoolean(self.EXTRA,
self.tr('Additional command-line parameters'),
defaultValue=None,
optional=True)
extra_param.setFlags(extra_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(extra_param)
self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
self.tr('Reprojected')))
@ -228,6 +237,10 @@ class warp(GdalAlgorithm):
if options:
arguments.extend(GdalUtils.parseCreationOptions(options))
if self.EXTRA in parameters and parameters[self.EXTRA] not in (None, ''):
extra = self.parameterAsString(parameters, self.EXTRA, context)
arguments.append(extra)
arguments.append(inLayer.source())
arguments.append(out)

37
python/plugins/processing/tests/GdalAlgorithmsTest.py
View File

@ -2213,6 +2213,43 @@ class TestGdalAlgorithms(unittest.TestCase, AlgorithmsTestBase.AlgorithmsTest):
source + ' ' +
outdir + '/check.jpg'])
# with additional command-line parameter
self.assertEqual(
alg.getConsoleCommands({'INPUT': source,
'EXTRA': '-dstalpha',
'OUTPUT': outdir + '/check.jpg'}, context, feedback),
['gdalwarp',
'-t_srs EPSG:4326 -r near -of JPEG -dstalpha ' +
source + ' ' +
outdir + '/check.jpg'])
self.assertEqual(
alg.getConsoleCommands({'INPUT': source,
'EXTRA': '-dstalpha -srcnodata -9999',
'OUTPUT': outdir + '/check.jpg'}, context, feedback),
['gdalwarp',
'-t_srs EPSG:4326 -r near -of JPEG -dstalpha -srcnodata -9999 ' +
source + ' ' +
outdir + '/check.jpg'])
self.assertEqual(
alg.getConsoleCommands({'INPUT': source,
'EXTRA': '-dstalpha -srcnodata "-9999 -8888"',
'OUTPUT': outdir + '/check.jpg'}, context, feedback),
['gdalwarp',
'-t_srs EPSG:4326 -r near -of JPEG -dstalpha -srcnodata "-9999 -8888" ' +
source + ' ' +
outdir + '/check.jpg'])
self.assertEqual(
alg.getConsoleCommands({'INPUT': source,
'EXTRA': '',
'OUTPUT': outdir + '/check.jpg'}, context, feedback),
['gdalwarp',
'-t_srs EPSG:4326 -r near -of JPEG ' +
source + ' ' +
outdir + '/check.jpg'])
def testRearrangeBands(self):
context = QgsProcessingContext()
feedback = QgsProcessingFeedback()