/*
* 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.
*/
/* $Id: RGBICCColorFunction.java 1328964 2012-04-22 20:09:49Z gadams $ */
package org.apache.fop.fo.expr;
import org.apache.fop.datatypes.PercentBase;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.fo.pagination.ColorProfile;
import org.apache.fop.fo.pagination.Declarations;
import org.apache.fop.fo.properties.ColorProperty;
import org.apache.fop.fo.properties.Property;
import org.apache.fop.util.ColorUtil;
/**
* Implements the rgb-icc() function.
*/
class RGBICCColorFunction extends FunctionBase {
/** {@inheritDoc} */
public int getRequiredArgsCount() {
return 4;
}
@Override
/** {@inheritDoc} */
public boolean hasVariableArgs() {
return true;
}
@Override
/** {@inheritDoc} */
public PercentBase getPercentBase() {
return new ICCPercentBase();
}
/** {@inheritDoc} */
public Property eval(Property[] args, PropertyInfo pInfo) throws PropertyException {
// Map color profile NCNAME to src from declarations/color-profile element
String colorProfileName = args[3].getString();
Declarations decls = (pInfo.getFO() != null
? pInfo.getFO().getRoot().getDeclarations()
: null);
ColorProfile cp = null;
if (decls == null) {
//function used in a color-specification
//on a FO occurring:
//a) before the fo:declarations,
//b) or in a document without fo:declarations?
//=> return the sRGB fallback
if (!ColorUtil.isPseudoProfile(colorProfileName)) {
Property[] rgbArgs = new Property[3];
System.arraycopy(args, 0, rgbArgs, 0, 3);
return new RGBColorFunction().eval(rgbArgs, pInfo);
}
} else {
cp = decls.getColorProfile(colorProfileName);
if (cp == null) {
if (!ColorUtil.isPseudoProfile(colorProfileName)) {
PropertyException pe = new PropertyException("The " + colorProfileName
+ " color profile was not declared");
pe.setPropertyInfo(pInfo);
throw pe;
}
}
}
String src = (cp != null ? cp.getSrc() : "");
float red = 0;
float green = 0;
float blue = 0;
red = args[0].getNumber().floatValue();
green = args[1].getNumber().floatValue();
blue = args[2].getNumber().floatValue();
/* Verify rgb replacement arguments */
if ((red < 0 || red > 255) || (green < 0 || green > 255) || (blue < 0 || blue > 255)) {
throw new PropertyException("Color values out of range. "
+ "Arguments to rgb-icc() must be [0..255] or [0%..100%]");
}
// rgb-icc is replaced with fop-rgb-icc which has an extra fifth argument containing the
// color profile src attribute as it is defined in the color-profile declarations element.
StringBuffer sb = new StringBuffer();
sb.append("fop-rgb-icc(");
sb.append(red / 255f);
sb.append(',').append(green / 255f);
sb.append(',').append(blue / 255f);
for (int ix = 3; ix < args.length; ix++) {
if (ix == 3) {
sb.append(',').append(colorProfileName);
sb.append(',').append(src);
} else {
sb.append(',').append(args[ix]);
}
}
sb.append(")");
return ColorProperty.getInstance(pInfo.getUserAgent(), sb.toString());
}
private static final class ICCPercentBase implements PercentBase {
/** {@inheritDoc} */
public int getBaseLength(PercentBaseContext context) throws PropertyException {
return 0;
}
/** {@inheritDoc} */
public double getBaseValue() {
return 255f;
}
/** {@inheritDoc} */
public int getDimension() {
return 0;
}
}
}