/*
* 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.cocoon.reading.imageop;
import java.awt.image.RescaleOp;
import java.awt.image.WritableRaster;
import org.apache.avalon.framework.parameters.Parameters;
public class ColorOperation
implements ImageOperation
{
private RescaleOp m_ColorFilter;
private String m_Prefix;
private boolean m_Enabled;
public void setPrefix( String prefix )
{
m_Prefix = prefix;
}
public void setup( Parameters params )
{
m_Enabled = params.getParameterAsBoolean( m_Prefix + "enabled", true);
float[] scaleColor = new float[3];
float[] offsetColor = new float[3];
scaleColor[0] = params.getParameterAsFloat( m_Prefix + "scale-red", -1.0f);
scaleColor[1] = params.getParameterAsFloat( m_Prefix + "scale-green", -1.0f);
scaleColor[2] = params.getParameterAsFloat( m_Prefix + "scale-blue", -1.0f);
offsetColor[0] = params.getParameterAsFloat( m_Prefix + "offset-red", 0.0f);
offsetColor[1] = params.getParameterAsFloat( m_Prefix + "offset-green", 0.0f);
offsetColor[2] = params.getParameterAsFloat( m_Prefix + "offset-blue", 0.0f);
m_ColorFilter = new RescaleOp( scaleColor, offsetColor, null );
}
public WritableRaster apply( WritableRaster image )
{
if( ! m_Enabled )
return image;
WritableRaster r = m_ColorFilter.filter( image, null );
return r;
}
public String getKey()
{
return "colorop:"
+ ( m_Enabled ? "enable" : "disable" )
+ ":" + m_ColorFilter
+ ":" + m_Prefix;
}
}