/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pdfbox.contentstream.operator.state;
import java.io.IOException;
import java.util.List;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.graphics.state.PDExtendedGraphicsState;
import org.apache.pdfbox.contentstream.operator.Operator;
import org.apache.pdfbox.contentstream.operator.OperatorProcessor;
import org.apache.pdfbox.contentstream.operator.MissingOperandException;
/**
* gs: Set parameters from graphics state parameter dictionary.
*
* @author Ben Litchfield
*/
public class SetGraphicsStateParameters extends OperatorProcessor
{
@Override
public void process(Operator operator, List<COSBase> arguments) throws IOException
{
if (arguments.size() < 1)
{
throw new MissingOperandException(operator, arguments);
}
COSBase base0 = arguments.get(0);
if (!(base0 instanceof COSName))
{
return;
}
// set parameters from graphics state parameter dictionary
COSName graphicsName = (COSName) base0;
PDExtendedGraphicsState gs = context.getResources().getExtGState(graphicsName);
if (gs == null)
{
throw new IOException("name for 'gs' operator not found in resources: /" + graphicsName.getName());
}
gs.copyIntoGraphicsState( context.getGraphicsState() );
}
@Override
public String getName()
{
return "gs";
}
}