def processAlgorithm(self, progress):
        inputFile = self.getParameterValue(self.INPUT_LAYER)
        zFactor = self.getParameterValue(self.Z_FACTOR)
        azimuth = self.getParameterValue(self.AZIMUTH)
        vAngle = self.getParameterValue(self.V_ANGLE)
        outputFile = self.getOutputValue(self.OUTPUT_LAYER)

        outputFormat = raster.formatShortNameFromFileName(outputFile)

        hillshade = QgsHillshadeFilter(inputFile, outputFile, outputFormat, azimuth, vAngle)
        hillshade.setZFactor(zFactor)
        hillshade.processRaster(None)

    def processAlgorithm(self, parameters, context, feedback):
        inputFile = self.parameterAsRasterLayer(parameters, self.INPUT, context).source()
        zFactor = self.parameterAsDouble(parameters, self.Z_FACTOR, context)
        azimuth = self.parameterAsDouble(parameters, self.AZIMUTH, context)
        vAngle = self.parameterAsDouble(parameters, self.V_ANGLE, context)

        outputFile = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
        outputFormat = QgsRasterFileWriter.driverForExtension(os.path.splitext(outputFile)[1])

        hillshade = QgsHillshadeFilter(inputFile, outputFile, outputFormat, azimuth, vAngle)
        hillshade.setZFactor(zFactor)
        hillshade.processRaster(feedback)

        return {self.OUTPUT: outputFile}