123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990 |
- /*
- * 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.fo.expr;
- import org.apache.fop.apps.FOUserAgent;
- import org.apache.fop.datatypes.PercentBase;
- import org.apache.fop.datatypes.PercentBaseContext;
- import org.apache.fop.fo.properties.ColorProperty;
- import org.apache.fop.fo.properties.Property;
-
- /**
- * Implements the cie-lab-color() function.
- * @since XSL-FO 2.0
- */
- class CIELabColorFunction extends FunctionBase {
-
- /** {@inheritDoc} */
- public int getRequiredArgsCount() {
- return 6;
- }
-
- @Override
- /** {@inheritDoc} */
- public PercentBase getPercentBase() {
- return new CIELabPercentBase();
- }
-
- /** {@inheritDoc} */
- public Property eval(Property[] args, PropertyInfo pInfo) throws PropertyException {
-
- float red = args[0].getNumber().floatValue();
- float green = args[1].getNumber().floatValue();
- float blue = args[2].getNumber().floatValue();
- /* Verify sRGB replacement arguments */
- if ((red < 0 || red > 255) || (green < 0 || green > 255) || (blue < 0 || blue > 255)) {
- throw new PropertyException("sRGB color values out of range. "
- + "Arguments to cie-lab-color() must be [0..255] or [0%..100%]");
- }
-
- float l = args[3].getNumber().floatValue();
- float a = args[4].getNumber().floatValue();
- float b = args[5].getNumber().floatValue();
- if (l < 0 || l > 100) {
- throw new PropertyException("L* value out of range. Valid range: [0..100]");
- }
- if (a < -127 || a > 127 || b < -127 || b > 127) {
- throw new PropertyException("a* and b* values out of range. Valid range: [-127..+127]");
- }
-
- StringBuffer sb = new StringBuffer();
- sb.append("cie-lab-color(" + red + "," + green + "," + blue + ","
- + l + "," + a + "," + b + ")");
- FOUserAgent ua = (pInfo == null)
- ? null
- : (pInfo.getFO() == null ? null : pInfo.getFO().getUserAgent());
- return ColorProperty.getInstance(ua, sb.toString());
- }
-
- private static class CIELabPercentBase implements PercentBase {
- public int getDimension() {
- return 0;
- }
-
- public double getBaseValue() {
- return 1.0f;
- }
-
- public int getBaseLength(PercentBaseContext context) {
- return 0;
- }
-
- }
-
- }
|