def testExtensionsForFormat(self):
self.assertCountEqual(
QgsRasterFileWriter.extensionsForFormat('not format'), [])
self.assertCountEqual(QgsRasterFileWriter.extensionsForFormat('GTiff'),
['tiff', 'tif'])
self.assertCountEqual(QgsRasterFileWriter.extensionsForFormat('GPKG'),
['gpkg'])
self.assertCountEqual(QgsRasterFileWriter.extensionsForFormat('JPEG'),
['jpg', 'jpeg'])
self.assertCountEqual(
QgsRasterFileWriter.extensionsForFormat('AAIGrid'), ['asc'])
def exportRasterLayer(self, layer, destinationFile, options=None):
outputFormat = self.settings['rasterFormat'] if 'rasterFormat' in self.settings else 'GTiff'
if os.path.splitext(destinationFile)[1] == '':
formats = QgsRasterFileWriter.extensionsForFormat(outputFormat)
if len(formats) > 0:
destinationFile = '{}.{}'.format(destinationFile, formats[0])
provider = layer.dataProvider()
cols = provider.xSize()
rows = provider.ySize()
if not provider.capabilities() & QgsRasterDataProvider.Size:
k = float(provider.extent().width()) / float(provider.extent().height())
cols = RASTER_SIZE * k
rows = RASTER_SIZE
pipe = QgsRasterPipe()
if not pipe.set(provider.clone()):
QgsMessageLog.logMessage(self.tr('Failed to export layer "{layer}": Cannot set pipe provider.'.format(layer=layer.name())), 'QConsolidate', Qgis.Warning)
return False, None
nodata = {}
for i in range(1, provider.bandCount() + 1):
if provider.sourceHasNoDataValue(i):
value = provider.sourceNoDataValue(i)
nodata[i] = QgsRasterRange(value, value)
nuller = QgsRasterNuller()
for band, value in nodata.items():
nuller.setNoData(band, [value])
if not pipe.insert(1, nuller):
QgsMessageLog.logMessage(self.tr('Failed to export layer "{layer}": Cannot set pipe nuller.'.format(layer=layer.name())), 'QConsolidate', Qgis.Warning)
return False, None
writer = QgsRasterFileWriter(destinationFile)
writer.setOutputFormat(outputFormat)
if options is not None:
writer.setCreateOptions(options)
success = True
error = writer.writeRaster(pipe, cols, rows, provider.extent(), provider.crs())
if error != QgsRasterFileWriter.NoError:
QgsMessageLog.logMessage(self.tr('Failed to export layer "{layer}": {message}.'.format(layer=layer.name(), message=error)), 'QConsolidate', Qgis.Warning)
success = False
return success, destinationFile
def testExtensionsForFormat(self):
self.assertCountEqual(QgsRasterFileWriter.extensionsForFormat('not format'), [])
self.assertCountEqual(QgsRasterFileWriter.extensionsForFormat('GTiff'), ['tiff', 'tif'])
self.assertCountEqual(QgsRasterFileWriter.extensionsForFormat('GPKG'), ['gpkg'])
self.assertCountEqual(QgsRasterFileWriter.extensionsForFormat('JPEG'), ['jpg', 'jpeg'])
self.assertCountEqual(QgsRasterFileWriter.extensionsForFormat('AAIGrid'), ['asc'])
def exportRasterLayer(self, layer, destinationFile, options=None):
outputFormat = self.settings[
'rasterFormat'] if 'rasterFormat' in self.settings else 'GTiff'
if os.path.splitext(destinationFile)[1] == '':
formats = QgsRasterFileWriter.extensionsForFormat(outputFormat)
if len(formats) > 0:
destinationFile = '{}.{}'.format(destinationFile, formats[0])
provider = layer.dataProvider()
cols = provider.xSize()
rows = provider.ySize()
if not provider.capabilities() & QgsRasterDataProvider.Size:
k = float(provider.extent().width()) / float(
provider.extent().height())
cols = RASTER_SIZE * k
rows = RASTER_SIZE
pipe = QgsRasterPipe()
if not pipe.set(provider.clone()):
QgsMessageLog.logMessage(
self.
tr('Failed to export layer "{layer}": Cannot set pipe provider.'
).format(layer=layer.name()), 'QConsolidate', Qgis.Warning)
return False, None
nodata = {}
for i in range(1, provider.bandCount() + 1):
if provider.sourceHasNoDataValue(i):
value = provider.sourceNoDataValue(i)
nodata[i] = QgsRasterRange(value, value)
nuller = QgsRasterNuller()
for band, value in nodata.items():
nuller.setNoData(band, [value])
if not pipe.insert(1, nuller):
QgsMessageLog.logMessage(
self.tr(
'Failed to export layer "{layer}": Cannot set pipe nuller.'
).format(layer=layer.name()), 'QConsolidate', Qgis.Warning)
return False, None
writer = QgsRasterFileWriter(destinationFile)
writer.setOutputFormat(outputFormat)
if options is not None:
writer.setCreateOptions(options)
success = True
error = writer.writeRaster(pipe, cols, rows, provider.extent(),
provider.crs())
if error != QgsRasterFileWriter.NoError:
QgsMessageLog.logMessage(
self.tr('Failed to export layer "{layer}": {message}.').format(
layer=layer.name(), message=error), 'QConsolidate',
Qgis.Warning)
success = False
return success, destinationFile
