1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 /* $Id$ */ 19 20 package org.apache.fop.complexscripts.fonts; 21 22 // CSOFF: LineLengthCheck 23 24 /** 25 * <p>The <code>GlyphSubstitution</code> interface is implemented by a glyph substitution subtable 26 * that supports the determination of glyph substitution information based on script and 27 * language of the corresponding character content.</p> 28 * 29 * <p>This work was originally authored by Glenn Adams (gadams@apache.org).</p> 30 */ 31 public interface GlyphSubstitution { 32 33 /** 34 * Perform glyph substitution at the current index, mutating the substitution state object as required. 35 * Only the context associated with the current index is processed. 36 * @param ss glyph substitution state object 37 * @return true if the glyph subtable was applied, meaning that the current context matches the 38 * associated input context glyph coverage table 39 */ substitute(GlyphSubstitutionState ss)40 boolean substitute(GlyphSubstitutionState ss); 41 42 } 43