com.sun.javafx.font.DFontDecoder Maven / Gradle / Ivy
/*
* Copyright (c) 2012, 2014, 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.
*
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package com.sun.javafx.font;
import java.io.IOException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import com.sun.glass.utils.NativeLibLoader;
class DFontDecoder extends FontFileWriter {
static {
AccessController.doPrivileged((PrivilegedAction) () -> {
NativeLibLoader.loadLibrary("javafx_font");
return null;
});
}
private native static long createCTFont(String fontName);
private native static void releaseCTFont(long font);
private native static int getCTFontFormat(long font);
private native static int[] getCTFontTags(long font);
private native static byte[] getCTFontTable(long font, int tag);
public DFontDecoder() {
super();
}
public void decode(String fontName) throws IOException {
if (fontName == null) {
throw new IOException("Invalid font name");
}
long fontRef = 0;
try {
fontRef = DFontDecoder.createCTFont(fontName);
if (fontRef == 0) {
throw new IOException("Failure creating CTFont");
}
int format = DFontDecoder.getCTFontFormat(fontRef);
if (format != trueTag && format != v1ttTag && format != ottoTag) {
throw new IOException("Unsupported Dfont");
}
int[] tags = DFontDecoder.getCTFontTags(fontRef);
short numTables = (short)tags.length;
int size = TTCHEADERSIZE + (DIRECTORYENTRYSIZE * numTables);
byte[][] tableData = new byte[numTables][];
for (int i = 0; i < tags.length; i++) {
int tag = tags[i];
tableData[i] = DFontDecoder.getCTFontTable(fontRef, tag);
int length = tableData[i].length;
size += (length + 3) & ~3;
}
DFontDecoder.releaseCTFont(fontRef);
fontRef = 0;
/* write header */
setLength(size);
writeHeader(format, numTables);
int dataOffset = TTCHEADERSIZE + (DIRECTORYENTRYSIZE * numTables);
for (int i = 0; i < numTables; i++) {
int tag = tags[i];
byte[] data = tableData[i];
/* write directory entry */
writeDirectoryEntry(i, tag, 0, dataOffset, data.length);
/* write table */
seek(dataOffset);
writeBytes(data);
dataOffset += (data.length + 3) & ~3;
}
} finally {
if (fontRef != 0) {
DFontDecoder.releaseCTFont(fontRef);
}
}
}
}