com.itextpdf.io.font.otf.OpenTableLookup Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2022 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
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The interactive user interfaces in modified source and object code versions
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Section 5 of the GNU Affero General Public License.
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a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
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develop commercial activities involving the iText software without
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*/
package com.itextpdf.io.font.otf;
public abstract class OpenTableLookup {
protected int lookupFlag;
protected int[] subTableLocations;
protected OpenTypeFontTableReader openReader;
protected OpenTableLookup(OpenTypeFontTableReader openReader, int lookupFlag, int[] subTableLocations) {
this.lookupFlag = lookupFlag;
this.subTableLocations = subTableLocations;
this.openReader = openReader;
}
public int getLookupFlag() {
return lookupFlag;
}
public abstract boolean transformOne(GlyphLine line);
public boolean transformLine(GlyphLine line) {
boolean changed = false;
line.idx = line.start;
while (line.idx < line.end && line.idx >= line.start) {
changed = transformOne(line) || changed;
}
return changed;
}
public boolean hasSubstitution(int index) {
return false;
}
protected void readSubTables() throws java.io.IOException {
for (int subTableLocation : subTableLocations) {
readSubTable(subTableLocation);
}
}
protected abstract void readSubTable(int subTableLocation) throws java.io.IOException;
public static class GlyphIndexer {
public GlyphLine line;
public Glyph glyph;
public int idx;
public void nextGlyph(OpenTypeFontTableReader openReader, int lookupFlag) {
glyph = null;
while (++idx < line.end) {
Glyph g = line.get(idx);
if (!openReader.isSkip(g.getCode(), lookupFlag)) {
glyph = g;
break;
}
}
}
public void previousGlyph(OpenTypeFontTableReader openReader, int lookupFlag) {
glyph = null;
while (--idx >= line.start) {
Glyph g = line.get(idx);
if (!openReader.isSkip(g.getCode(), lookupFlag)) {
glyph = g;
break;
}
}
}
}
}