/*
* Copyright 1999-2006 The Apache Software Foundation.
*
* Licensed 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.
*/
/* $Id: RGBColorFunction.java 377045 2006-02-11 20:23:47Z jeremias $ */
package org.apache.fop.fo.expr;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.datatypes.PercentBase;
import org.apache.fop.fo.properties.ColorTypeProperty;
import org.apache.fop.fo.properties.Property;
/**
* Implements the rgb() function.
*/
class RGBColorFunction extends FunctionBase {
/** @see org.apache.fop.fo.expr.Function#nbArgs() */
public int nbArgs() {
return 3;
}
/**
* @return an object which implements the PercentBase interface.
* Percents in arguments to this function are interpreted relative
* to 255.
*/
public PercentBase getPercentBase() {
return new RGBPercentBase();
}
/** @see org.apache.fop.fo.expr.Function */
public Property eval(Property[] args,
PropertyInfo pInfo) throws PropertyException {
return new ColorTypeProperty("rgb(" + args[0] + "," + args[1] + "," + args[2] + ")");
}
static class RGBPercentBase implements PercentBase {
public int getDimension() {
return 0;
}
public double getBaseValue() {
return 255f;
}
public int getBaseLength(PercentBaseContext context) {
return 0;
}
}
}