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113 lines
4.0 KiB
Java
113 lines
4.0 KiB
Java
/*
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* Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.font;
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/*
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* NB the versions that take a char as an int are used by the opentype
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* layout engine. If that remains in native these methods may not be
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* needed in the Java class.
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*/
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public abstract class CharToGlyphMapper {
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public static final int HI_SURROGATE_START = 0xD800;
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public static final int HI_SURROGATE_END = 0xDBFF;
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public static final int LO_SURROGATE_START = 0xDC00;
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public static final int LO_SURROGATE_END = 0xDFFF;
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public static final int VS_START = 0xFE00;
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public static final int VS_END = 0xFE0F;
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public static final int VSS_START = 0xE0100;
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public static final int VSS_END = 0xE01FF;
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public static final int UNINITIALIZED_GLYPH = -1;
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public static final int INVISIBLE_GLYPH_ID = 0xffff;
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public static final int INVISIBLE_GLYPHS = 0xfffe; // and above
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protected int missingGlyph = CharToGlyphMapper.UNINITIALIZED_GLYPH;
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public int getMissingGlyphCode() {
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return missingGlyph;
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}
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/* Default implementations of these methods may be overridden by
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* subclasses which have special requirements or optimisations
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*/
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public boolean canDisplay(char ch) {
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int glyph = charToGlyph(ch);
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return glyph != missingGlyph;
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}
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public boolean canDisplay(int cp) {
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int glyph = charToGlyph(cp);
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return glyph != missingGlyph;
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}
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public int charToGlyph(char unicode) {
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char[] chars = new char[1];
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int[] glyphs = new int[1];
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chars[0] = unicode;
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charsToGlyphs(1, chars, glyphs);
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return glyphs[0];
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}
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public int charToGlyph(int unicode) {
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int[] chars = new int[1];
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int [] glyphs = new int[1];
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chars[0] = unicode;
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charsToGlyphs(1, chars, glyphs);
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return glyphs[0];
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}
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public int charToVariationGlyph(int unicode, int variationSelector) {
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// Override this if variation selector is supported.
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return charToGlyph(unicode);
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}
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public int charToVariationGlyphRaw(int unicode, int variationSelector) {
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// Override this if variation selector is supported.
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return charToGlyphRaw(unicode);
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}
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public abstract int charToGlyphRaw(int unicode);
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public abstract int getNumGlyphs();
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public abstract void charsToGlyphs(int count,
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char[] unicodes, int[] glyphs);
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public abstract boolean charsToGlyphsNS(int count,
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char[] unicodes, int[] glyphs);
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public abstract void charsToGlyphs(int count,
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int[] unicodes, int[] glyphs);
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public static boolean isVariationSelector(int charCode) {
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return ((charCode >= VSS_START && charCode <= VSS_END) ||
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(charCode >= VS_START && charCode <= VS_END));
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}
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}
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