com.sun.javafx.font.CharToGlyphMapper Maven / Gradle / Ivy
/*
* Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package com.sun.javafx.font;
/*
* NB the versions that take a char as an int are used by the opentype
* layout engine. If that remains in native these methods may not be
* needed in the Java class.
*/
public abstract class CharToGlyphMapper {
public static final int HI_SURROGATE_SHIFT = 10;
public static final int HI_SURROGATE_START = 0xD800;
public static final int HI_SURROGATE_END = 0xDBFF;
public static final int LO_SURROGATE_START = 0xDC00;
public static final int LO_SURROGATE_END = 0xDFFF;
public static final int SURROGATES_START = 0x10000;
public static final int MISSING_GLYPH = 0;
public static final int INVISIBLE_GLYPH_ID = 0xffff;
protected int missingGlyph = MISSING_GLYPH;
public boolean canDisplay(char cp) {
int glyph = charToGlyph(cp);
return glyph != missingGlyph;
}
public int getMissingGlyphCode() {
return missingGlyph;
}
public abstract int getGlyphCode(int charCode);
public int charToGlyph(char unicode) {
return getGlyphCode(unicode);
}
public int charToGlyph(int unicode) {
return getGlyphCode(unicode);
}
public void charsToGlyphs(int start, int count, char[] unicodes,
int[] glyphs, int glyphStart) {
for (int i=0; i= HI_SURROGATE_START &&
code <= HI_SURROGATE_END && i + 1 < count) {
char low = unicodes[start + i + 1];
if (low >= LO_SURROGATE_START &&
low <= LO_SURROGATE_END) {
code = ((code - HI_SURROGATE_START) << HI_SURROGATE_SHIFT) +
low - LO_SURROGATE_START + SURROGATES_START;
glyphs[glyphStart + i] = getGlyphCode(code);
i += 1; // Empty glyph slot after surrogate
glyphs[glyphStart + i] = INVISIBLE_GLYPH_ID;
continue;
}
}
glyphs[glyphStart + i] = getGlyphCode(code);
}
}
public void charsToGlyphs(int start, int count, char[] unicodes, int[] glyphs) {
charsToGlyphs(start, count, unicodes, glyphs, 0);
}
public void charsToGlyphs(int count, char[] unicodes, int[] glyphs) {
charsToGlyphs(0, count, unicodes, glyphs, 0);
}
}