/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fonts.truetype;
import java.io.IOException;
/**
* Reads a TrueType file or a TrueType Collection.
* The TrueType spec can be found at the Microsoft.
* Typography site: http://www.microsoft.com/truetype/
*/
public class TTFFile extends OpenFont {
public TTFFile() {
this(true, false);
}
/**
* Constructor
* @param useKerning true if kerning data should be loaded
* @param useAdvanced true if advanced typographic tables should be loaded
*/
public TTFFile(boolean useKerning, boolean useAdvanced) {
super(useKerning, useAdvanced);
}
/**
* Read the "name" table.
* @throws IOException In case of a I/O problem
*/
protected void readName() throws IOException {
seekTab(fontFile, OFTableName.NAME, 2);
int i = fontFile.getCurrentPos();
int n = fontFile.readTTFUShort();
int j = fontFile.readTTFUShort() + i - 2;
i += 2 * 2;
while (n-- > 0) {
// getLogger().debug("Iteration: " + n);
fontFile.seekSet(i);
final int platformID = fontFile.readTTFUShort();
final int encodingID = fontFile.readTTFUShort();
final int languageID = fontFile.readTTFUShort();
int k = fontFile.readTTFUShort();
int l = fontFile.readTTFUShort();
if (((platformID == 1 || platformID == 3)
&& (encodingID == 0 || encodingID == 1))) {
fontFile.seekSet(j + fontFile.readTTFUShort());
String txt;
if (platformID == 3) {
txt = fontFile.readTTFString(l, encodingID);
} else {
txt = fontFile.readTTFString(l);
}
if (log.isDebugEnabled()) {
log.debug(platformID + " "
+ encodingID + " "
+ languageID + " "
+ k + " " + txt);
}
switch (k) {
case 0:
if (notice.length() == 0) {
notice = txt;
}
break;
case 1: //Font Family Name
case 16: //Preferred Family
familyNames.add(txt);
break;
case 2:
if (subFamilyName.length() == 0) {
subFamilyName = txt;
}
break;
case 4:
if (fullName.length() == 0 || (platformID == 3 && languageID == 1033)) {
fullName = txt;
}
break;
case 6:
if (postScriptName.length() == 0) {
postScriptName = txt;
}
break;
default:
break;
}
}
i += 6 * 2;
}
}
/**
* Read the "glyf" table to find the bounding boxes.
* @throws IOException In case of a I/O problem
*/
private void readGlyf() throws IOException {
OFDirTabEntry dirTab = dirTabs.get(OFTableName.GLYF);
if (dirTab == null) {
throw new IOException("glyf table not found, cannot continue");
}
for (int i = 0; i < (numberOfGlyphs - 1); i++) {
if (mtxTab[i].getOffset() != mtxTab[i + 1].getOffset()) {
fontFile.seekSet(dirTab.getOffset() + mtxTab[i].getOffset());
fontFile.skip(2);
final int[] bbox = {
fontFile.readTTFShort(),
fontFile.readTTFShort(),
fontFile.readTTFShort(),
fontFile.readTTFShort()};
mtxTab[i].setBoundingBox(bbox);
} else {
mtxTab[i].setBoundingBox(mtxTab[0].getBoundingBox());
}
}
long n = (dirTabs.get(OFTableName.GLYF)).getOffset();
for (int i = 0; i < numberOfGlyphs; i++) {
if ((i + 1) >= mtxTab.length
|| mtxTab[i].getOffset() != mtxTab[i + 1].getOffset()) {
fontFile.seekSet(n + mtxTab[i].getOffset());
fontFile.skip(2);
final int[] bbox = {
fontFile.readTTFShort(),
fontFile.readTTFShort(),
fontFile.readTTFShort(),
fontFile.readTTFShort()};
mtxTab[i].setBoundingBox(bbox);
} else {
/**@todo Verify that this is correct, looks like a copy/paste bug (jm)*/
final int bbox0 = mtxTab[0].getBoundingBox()[0];
final int[] bbox = {bbox0, bbox0, bbox0, bbox0};
mtxTab[i].setBoundingBox(bbox);
/* Original code
mtxTab[i].bbox[0] = mtxTab[0].bbox[0];
mtxTab[i].bbox[1] = mtxTab[0].bbox[0];
mtxTab[i].bbox[2] = mtxTab[0].bbox[0];
mtxTab[i].bbox[3] = mtxTab[0].bbox[0]; */
}
if (log.isTraceEnabled()) {
log.trace(mtxTab[i].toString(this));
}
}
}
@Override
protected void updateBBoxAndOffset() throws IOException {
readIndexToLocation();
readGlyf();
}
/**
* Read the "loca" table.
* @throws IOException In case of a I/O problem
*/
protected final void readIndexToLocation()
throws IOException {
if (!seekTab(fontFile, OFTableName.LOCA, 0)) {
throw new IOException("'loca' table not found, happens when the font file doesn't"
+ " contain TrueType outlines (trying to read an OpenType CFF font maybe?)");
}
for (int i = 0; i < numberOfGlyphs; i++) {
mtxTab[i].setOffset(locaFormat == 1 ? fontFile.readTTFULong()
: (fontFile.readTTFUShort() << 1));
}
lastLoca = (locaFormat == 1 ? fontFile.readTTFULong()
: (fontFile.readTTFUShort() << 1));
}
/**
* Gets the last location of the glyf table
* @return The last location as a long
*/
public long getLastGlyfLocation() {
return lastLoca;
}
@Override
protected void initializeFont(FontFileReader in) throws IOException {
fontFile = in;
}
}