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- /*
- * 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;
- import java.util.ArrayList;
- import java.util.BitSet;
- import java.util.Comparator;
- import java.util.HashMap;
- import java.util.HashSet;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
- import java.util.Map.Entry;
- import java.util.Set;
- import java.util.SortedSet;
- import java.util.TreeSet;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.fonts.Glyphs;
-
- import org.apache.fop.complexscripts.fonts.AdvancedTypographicTableFormatException;
- import org.apache.fop.complexscripts.fonts.GlyphDefinitionTable;
- import org.apache.fop.complexscripts.fonts.GlyphPositioningTable;
- import org.apache.fop.complexscripts.fonts.GlyphSubstitutionTable;
- import org.apache.fop.complexscripts.fonts.OTFAdvancedTypographicTableReader;
- import org.apache.fop.fonts.CMapSegment;
- import org.apache.fop.fonts.FontUtil;
-
- /**
- * 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 {
-
- static final byte NTABS = 24;
- static final int MAX_CHAR_CODE = 255;
- static final int ENC_BUF_SIZE = 1024;
-
- private static final String[] MAC_GLYPH_ORDERING = {
- /* 0x000 */
- ".notdef", ".null", "nonmarkingreturn", "space",
- "exclam", "quotedbl", "numbersign", "dollar",
- "percent", "ampersand", "quotesingle", "parenleft",
- "parenright", "asterisk", "plus", "comma",
- /* 0x010 */
- "hyphen", "period", "slash", "zero",
- "one", "two", "three", "four",
- "five", "six", "seven", "eight",
- "nine", "colon", "semicolon", "less",
- /* 0x020 */
- "equal", "greater", "question", "at",
- "A", "B", "C", "D",
- "E", "F", "G", "H",
- "I", "J", "K", "L",
- /* 0x030 */
- "M", "N", "O", "P",
- "Q", "R", "S", "T",
- "U", "V", "W", "X",
- "Y", "Z", "bracketleft", "backslash",
- /* 0x040 */
- "bracketright", "asciicircum", "underscore", "grave",
- "a", "b", "c", "d",
- "e", "f", "g", "h",
- "i", "j", "k", "l",
- /* 0x050 */
- "m", "n", "o", "p",
- "q", "r", "s", "t",
- "u", "v", "w", "x",
- "y", "z", "braceleft", "bar",
- /* 0x060 */
- "braceright", "asciitilde", "Adieresis", "Aring",
- "Ccedilla", "Eacute", "Ntilde", "Odieresis",
- "Udieresis", "aacute", "agrave", "acircumflex",
- "adieresis", "atilde", "aring", "ccedilla",
- /* 0x070 */
- "eacute", "egrave", "ecircumflex", "edieresis",
- "iacute", "igrave", "icircumflex", "idieresis",
- "ntilde", "oacute", "ograve", "ocircumflex",
- "odieresis", "otilde", "uacute", "ugrave",
- /* 0x080 */
- "ucircumflex", "udieresis", "dagger", "degree",
- "cent", "sterling", "section", "bullet",
- "paragraph", "germandbls", "registered", "copyright",
- "trademark", "acute", "dieresis", "notequal",
- /* 0x090 */
- "AE", "Oslash", "infinity", "plusminus",
- "lessequal", "greaterequal", "yen", "mu",
- "partialdiff", "summation", "product", "pi",
- "integral", "ordfeminine", "ordmasculine", "Omega",
- /* 0x0A0 */
- "ae", "oslash", "questiondown", "exclamdown",
- "logicalnot", "radical", "florin", "approxequal",
- "Delta", "guillemotleft", "guillemotright", "ellipsis",
- "nonbreakingspace", "Agrave", "Atilde", "Otilde",
- /* 0x0B0 */
- "OE", "oe", "endash", "emdash",
- "quotedblleft", "quotedblright", "quoteleft", "quoteright",
- "divide", "lozenge", "ydieresis", "Ydieresis",
- "fraction", "currency", "guilsinglleft", "guilsinglright",
- /* 0x0C0 */
- "fi", "fl", "daggerdbl", "periodcentered",
- "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex",
- "Ecircumflex", "Aacute", "Edieresis", "Egrave",
- "Iacute", "Icircumflex", "Idieresis", "Igrave",
- /* 0x0D0 */
- "Oacute", "Ocircumflex", "apple", "Ograve",
- "Uacute", "Ucircumflex", "Ugrave", "dotlessi",
- "circumflex", "tilde", "macron", "breve",
- "dotaccent", "ring", "cedilla", "hungarumlaut",
- /* 0x0E0 */
- "ogonek", "caron", "Lslash", "lslash",
- "Scaron", "scaron", "Zcaron", "zcaron",
- "brokenbar", "Eth", "eth", "Yacute",
- "yacute", "Thorn", "thorn", "minus",
- /* 0x0F0 */
- "multiply", "onesuperior", "twosuperior", "threesuperior",
- "onehalf", "onequarter", "threequarters", "franc",
- "Gbreve", "gbreve", "Idotaccent", "Scedilla",
- "scedilla", "Cacute", "cacute", "Ccaron",
- /* 0x100 */
- "ccaron", "dcroat"
- };
-
- /** The FontFileReader used to read this TrueType font. */
- protected FontFileReader fontFile;
-
- /** Set to true to get even more debug output than with level DEBUG */
- public static final boolean TRACE_ENABLED = false;
-
- private final String encoding = "WinAnsiEncoding"; // Default encoding
-
- private final short firstChar = 0;
-
- private boolean useKerning = false;
-
- private boolean isEmbeddable = true;
- private boolean hasSerifs = true;
- /**
- * Table directory
- */
- protected Map<TTFTableName, TTFDirTabEntry> dirTabs;
- private Map<Integer, Map<Integer, Integer>> kerningTab; // for CIDs
- private Map<Integer, Map<Integer, Integer>> ansiKerningTab; // For winAnsiEncoding
- private List<CMapSegment> cmaps;
- private Set<UnicodeMapping> unicodeMappings;
-
- private int upem; // unitsPerEm from "head" table
- private int nhmtx; // Number of horizontal metrics
- private PostScriptVersion postScriptVersion;
- private int locaFormat;
- /**
- * Offset to last loca
- */
- protected long lastLoca = 0;
- private int numberOfGlyphs; // Number of glyphs in font (read from "maxp" table)
-
- /**
- * Contains glyph data
- */
- protected TTFMtxEntry[] mtxTab; // Contains glyph data
-
- private String postScriptName = "";
- private String fullName = "";
- private String notice = "";
- private Set<String> familyNames = new HashSet<String>();
- private String subFamilyName = "";
-
- private long italicAngle = 0;
- private long isFixedPitch = 0;
- private int fontBBox1 = 0;
- private int fontBBox2 = 0;
- private int fontBBox3 = 0;
- private int fontBBox4 = 0;
- private int capHeight = 0;
- private int os2CapHeight = 0;
- private int underlinePosition = 0;
- private int underlineThickness = 0;
- private int xHeight = 0;
- private int os2xHeight = 0;
- //Effective ascender/descender
- private int ascender = 0;
- private int descender = 0;
- //Ascender/descender from hhea table
- private int hheaAscender = 0;
- private int hheaDescender = 0;
- //Ascender/descender from OS/2 table
- private int os2Ascender = 0;
- private int os2Descender = 0;
- private int usWeightClass = 0;
-
- private short lastChar = 0;
-
- private int[] ansiWidth;
- private Map<Integer, List<Integer>> ansiIndex;
-
- // internal mapping of glyph indexes to unicode indexes
- // used for quick mappings in this class
- private final Map<Integer, Integer> glyphToUnicodeMap = new HashMap<Integer, Integer> ();
- private final Map<Integer, Integer> unicodeToGlyphMap = new HashMap<Integer, Integer> ();
-
- private TTFDirTabEntry currentDirTab;
-
- private boolean isCFF;
-
- // advanced typographic table support
- private boolean useAdvanced = false;
- private OTFAdvancedTypographicTableReader advancedTableReader;
-
- /**
- * logging instance
- */
- protected Log log = LogFactory.getLog(TTFFile.class);
-
- 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 ) {
- this.useKerning = useKerning;
- this.useAdvanced = useAdvanced;
- }
-
- /**
- * Key-value helper class.
- */
- final class UnicodeMapping implements Comparable {
-
- private final int unicodeIndex;
- private final int glyphIndex;
-
- UnicodeMapping(int glyphIndex, int unicodeIndex) {
- this.unicodeIndex = unicodeIndex;
- this.glyphIndex = glyphIndex;
- glyphToUnicodeMap.put(new Integer(glyphIndex), new Integer(unicodeIndex));
- unicodeToGlyphMap.put(new Integer(unicodeIndex), new Integer(glyphIndex));
- }
-
- /**
- * Returns the glyphIndex.
- * @return the glyph index
- */
- public int getGlyphIndex() {
- return glyphIndex;
- }
-
- /**
- * Returns the unicodeIndex.
- * @return the Unicode index
- */
- public int getUnicodeIndex() {
- return unicodeIndex;
- }
-
-
- /** {@inheritDoc} */
- public int hashCode() {
- int hc = unicodeIndex;
- hc = 19 * hc + ( hc ^ glyphIndex );
- return hc;
- }
-
- /** {@inheritDoc} */
- public boolean equals ( Object o ) {
- if ( o instanceof UnicodeMapping ) {
- UnicodeMapping m = (UnicodeMapping) o;
- if ( unicodeIndex != m.unicodeIndex ) {
- return false;
- } else {
- return ( glyphIndex == m.glyphIndex );
- }
- } else {
- return false;
- }
- }
-
- /** {@inheritDoc} */
- public int compareTo ( Object o ) {
- if ( o instanceof UnicodeMapping ) {
- UnicodeMapping m = (UnicodeMapping) o;
- if ( unicodeIndex > m.unicodeIndex ) {
- return 1;
- } else if ( unicodeIndex < m.unicodeIndex ) {
- return -1;
- } else {
- return 0;
- }
- } else {
- return -1;
- }
- }
- }
-
- /**
- * Version of the PostScript table (<q>post</q>) contained in this font.
- */
- public static enum PostScriptVersion {
- /** PostScript table version 1.0. */
- V1,
- /** PostScript table version 2.0. */
- V2,
- /** PostScript table version 3.0. */
- V3,
- /** Unknown version of the PostScript table. */
- UNKNOWN;
- }
-
- /**
- * Obtain directory table entry.
- * @param name (tag) of entry
- * @return a directory table entry or null if none found
- */
- public TTFDirTabEntry getDirectoryEntry(TTFTableName name) {
- return dirTabs.get(name);
- }
-
- /**
- * Position inputstream to position indicated
- * in the dirtab offset + offset
- * @param in font file reader
- * @param tableName (tag) of table
- * @param offset from start of table
- * @return true if seek succeeded
- * @throws IOException if I/O exception occurs during seek
- */
- public boolean seekTab(FontFileReader in, TTFTableName tableName,
- long offset) throws IOException {
- TTFDirTabEntry dt = dirTabs.get(tableName);
- if (dt == null) {
- log.error("Dirtab " + tableName.getName() + " not found.");
- return false;
- } else {
- in.seekSet(dt.getOffset() + offset);
- this.currentDirTab = dt;
- }
- return true;
- }
-
- /**
- * Convert from truetype unit to pdf unit based on the
- * unitsPerEm field in the "head" table
- * @param n truetype unit
- * @return pdf unit
- */
- public int convertTTFUnit2PDFUnit(int n) {
- int ret;
- if (n < 0) {
- long rest1 = n % upem;
- long storrest = 1000 * rest1;
- long ledd2 = (storrest != 0 ? rest1 / storrest : 0);
- ret = -((-1000 * n) / upem - (int)ledd2);
- } else {
- ret = (n / upem) * 1000 + ((n % upem) * 1000) / upem;
- }
-
- return ret;
- }
-
- /**
- * Read the cmap table,
- * return false if the table is not present or only unsupported
- * tables are present. Currently only unicode cmaps are supported.
- * Set the unicodeIndex in the TTFMtxEntries and fills in the
- * cmaps vector.
- */
- private boolean readCMAP() throws IOException {
-
- unicodeMappings = new java.util.TreeSet();
-
- seekTab(fontFile, TTFTableName.CMAP, 2);
- int numCMap = fontFile.readTTFUShort(); // Number of cmap subtables
- long cmapUniOffset = 0;
- long symbolMapOffset = 0;
-
- if (log.isDebugEnabled()) {
- log.debug(numCMap + " cmap tables");
- }
-
- //Read offset for all tables. We are only interested in the unicode table
- for (int i = 0; i < numCMap; i++) {
- int cmapPID = fontFile.readTTFUShort();
- int cmapEID = fontFile.readTTFUShort();
- long cmapOffset = fontFile.readTTFLong();
-
- if (log.isDebugEnabled()) {
- log.debug("Platform ID: " + cmapPID + " Encoding: " + cmapEID);
- }
-
- if (cmapPID == 3 && cmapEID == 1) {
- cmapUniOffset = cmapOffset;
- }
- if (cmapPID == 3 && cmapEID == 0) {
- symbolMapOffset = cmapOffset;
- }
- }
-
- if (cmapUniOffset > 0) {
- return readUnicodeCmap(cmapUniOffset, 1);
- } else if (symbolMapOffset > 0) {
- return readUnicodeCmap(symbolMapOffset, 0);
- } else {
- log.fatal("Unsupported TrueType font: No Unicode or Symbol cmap table"
- + " not present. Aborting");
- return false;
- }
- }
-
- private boolean readUnicodeCmap // CSOK: MethodLength
- (long cmapUniOffset, int encodingID)
- throws IOException {
- //Read CMAP table and correct mtxTab.index
- int mtxPtr = 0;
-
- // Read unicode cmap
- seekTab(fontFile, TTFTableName.CMAP, cmapUniOffset);
- int cmapFormat = fontFile.readTTFUShort();
- /*int cmap_length =*/ fontFile.readTTFUShort(); //skip cmap length
-
- if (log.isDebugEnabled()) {
- log.debug("CMAP format: " + cmapFormat);
- }
-
- if (cmapFormat == 4) {
- fontFile.skip(2); // Skip version number
- int cmapSegCountX2 = fontFile.readTTFUShort();
- int cmapSearchRange = fontFile.readTTFUShort();
- int cmapEntrySelector = fontFile.readTTFUShort();
- int cmapRangeShift = fontFile.readTTFUShort();
-
- if (log.isDebugEnabled()) {
- log.debug("segCountX2 : " + cmapSegCountX2);
- log.debug("searchRange : " + cmapSearchRange);
- log.debug("entrySelector: " + cmapEntrySelector);
- log.debug("rangeShift : " + cmapRangeShift);
- }
-
-
- int[] cmapEndCounts = new int[cmapSegCountX2 / 2];
- int[] cmapStartCounts = new int[cmapSegCountX2 / 2];
- int[] cmapDeltas = new int[cmapSegCountX2 / 2];
- int[] cmapRangeOffsets = new int[cmapSegCountX2 / 2];
-
- for (int i = 0; i < (cmapSegCountX2 / 2); i++) {
- cmapEndCounts[i] = fontFile.readTTFUShort();
- }
-
- fontFile.skip(2); // Skip reservedPad
-
- for (int i = 0; i < (cmapSegCountX2 / 2); i++) {
- cmapStartCounts[i] = fontFile.readTTFUShort();
- }
-
- for (int i = 0; i < (cmapSegCountX2 / 2); i++) {
- cmapDeltas[i] = fontFile.readTTFShort();
- }
-
- //int startRangeOffset = in.getCurrentPos();
-
- for (int i = 0; i < (cmapSegCountX2 / 2); i++) {
- cmapRangeOffsets[i] = fontFile.readTTFUShort();
- }
-
- int glyphIdArrayOffset = fontFile.getCurrentPos();
-
- BitSet eightBitGlyphs = new BitSet(256);
-
- // Insert the unicode id for the glyphs in mtxTab
- // and fill in the cmaps ArrayList
-
- for (int i = 0; i < cmapStartCounts.length; i++) {
-
- if (log.isTraceEnabled()) {
- log.trace(i + ": " + cmapStartCounts[i]
- + " - " + cmapEndCounts[i]);
- }
- if (log.isDebugEnabled()) {
- if (isInPrivateUseArea(cmapStartCounts[i], cmapEndCounts[i])) {
- log.debug("Font contains glyphs in the Unicode private use area: "
- + Integer.toHexString(cmapStartCounts[i]) + " - "
- + Integer.toHexString(cmapEndCounts[i]));
- }
- }
-
- for (int j = cmapStartCounts[i]; j <= cmapEndCounts[i]; j++) {
-
- // Update lastChar
- if (j < 256 && j > lastChar) {
- lastChar = (short)j;
- }
-
- if (j < 256) {
- eightBitGlyphs.set(j);
- }
-
- if (mtxPtr < mtxTab.length) {
- int glyphIdx;
- // the last character 65535 = .notdef
- // may have a range offset
- if (cmapRangeOffsets[i] != 0 && j != 65535) {
- int glyphOffset = glyphIdArrayOffset
- + ((cmapRangeOffsets[i] / 2)
- + (j - cmapStartCounts[i])
- + (i)
- - cmapSegCountX2 / 2) * 2;
- fontFile.seekSet(glyphOffset);
- glyphIdx = (fontFile.readTTFUShort() + cmapDeltas[i])
- & 0xffff;
-
- unicodeMappings.add(new UnicodeMapping(glyphIdx, j));
- mtxTab[glyphIdx].getUnicodeIndex().add(new Integer(j));
-
- // Also add winAnsiWidth
- List<Integer> v = ansiIndex.get(new Integer(j));
- if (v != null) {
- for (Integer aIdx : v) {
- ansiWidth[aIdx.intValue()]
- = mtxTab[glyphIdx].getWx();
-
- if (log.isTraceEnabled()) {
- log.trace("Added width "
- + mtxTab[glyphIdx].getWx()
- + " uni: " + j
- + " ansi: " + aIdx.intValue());
- }
- }
- }
-
- if (log.isTraceEnabled()) {
- log.trace("Idx: "
- + glyphIdx
- + " Delta: " + cmapDeltas[i]
- + " Unicode: " + j
- + " name: " + mtxTab[glyphIdx].getName());
- }
- } else {
- glyphIdx = (j + cmapDeltas[i]) & 0xffff;
-
- if (glyphIdx < mtxTab.length) {
- mtxTab[glyphIdx].getUnicodeIndex().add(new Integer(j));
- } else {
- log.debug("Glyph " + glyphIdx
- + " out of range: "
- + mtxTab.length);
- }
-
- unicodeMappings.add(new UnicodeMapping(glyphIdx, j));
- if (glyphIdx < mtxTab.length) {
- mtxTab[glyphIdx].getUnicodeIndex().add(new Integer(j));
- } else {
- log.debug("Glyph " + glyphIdx
- + " out of range: "
- + mtxTab.length);
- }
-
- // Also add winAnsiWidth
- List<Integer> v = ansiIndex.get(new Integer(j));
- if (v != null) {
- for (Integer aIdx : v) {
- ansiWidth[aIdx.intValue()] = mtxTab[glyphIdx].getWx();
- }
- }
-
- //getLogger().debug("IIdx: " +
- // mtxPtr +
- // " Delta: " + cmap_deltas[i] +
- // " Unicode: " + j +
- // " name: " +
- // mtxTab[(j+cmap_deltas[i]) & 0xffff].name);
-
- }
- if (glyphIdx < mtxTab.length) {
- if (mtxTab[glyphIdx].getUnicodeIndex().size() < 2) {
- mtxPtr++;
- }
- }
- }
- }
- }
- } else {
- log.error("Cmap format not supported: " + cmapFormat);
- return false;
- }
- return true;
- }
-
- private boolean isInPrivateUseArea(int start, int end) {
- return (isInPrivateUseArea(start) || isInPrivateUseArea(end));
- }
-
- private boolean isInPrivateUseArea(int unicode) {
- return (unicode >= 0xE000 && unicode <= 0xF8FF);
- }
-
- /**
- * Print first char/last char
- */
- private void printMaxMin() {
- int min = 255;
- int max = 0;
- for (int i = 0; i < mtxTab.length; i++) {
- if (mtxTab[i].getIndex() < min) {
- min = mtxTab[i].getIndex();
- }
- if (mtxTab[i].getIndex() > max) {
- max = mtxTab[i].getIndex();
- }
- }
- log.info("Min: " + min);
- log.info("Max: " + max);
- }
-
-
- /**
- * Reads the font using a FontFileReader.
- *
- * @param in The FontFileReader to use
- * @throws IOException In case of an I/O problem
- */
- public void readFont(FontFileReader in) throws IOException {
- readFont(in, (String)null);
- }
-
- /**
- * initialize the ansiWidths array (for winAnsiEncoding)
- * and fill with the missingwidth
- */
- private void initAnsiWidths() {
- ansiWidth = new int[256];
- for (int i = 0; i < 256; i++) {
- ansiWidth[i] = mtxTab[0].getWx();
- }
-
- // Create an index hash to the ansiWidth
- // Can't just index the winAnsiEncoding when inserting widths
- // same char (eg bullet) is repeated more than one place
- ansiIndex = new HashMap<Integer, List<Integer>>();
- for (int i = 32; i < Glyphs.WINANSI_ENCODING.length; i++) {
- Integer ansi = new Integer(i);
- Integer uni = new Integer(Glyphs.WINANSI_ENCODING[i]);
-
- List<Integer> v = ansiIndex.get(uni);
- if (v == null) {
- v = new ArrayList<Integer>();
- ansiIndex.put(uni, v);
- }
- v.add(ansi);
- }
- }
-
- /**
- * Read the font data.
- * If the fontfile is a TrueType Collection (.ttc file)
- * the name of the font to read data for must be supplied,
- * else the name is ignored.
- *
- * @param in The FontFileReader to use
- * @param name The name of the font
- * @return boolean Returns true if the font is valid
- * @throws IOException In case of an I/O problem
- */
- public boolean readFont(FontFileReader in, String name) throws IOException {
- fontFile = in;
- /*
- * Check if TrueType collection, and that the name
- * exists in the collection
- */
- if (!checkTTC(name)) {
- if (name == null) {
- throw new IllegalArgumentException(
- "For TrueType collection you must specify which font "
- + "to select (-ttcname)");
- } else {
- throw new IOException(
- "Name does not exist in the TrueType collection: " + name);
- }
- }
-
- readDirTabs();
- readFontHeader();
- getNumGlyphs();
- if (log.isDebugEnabled()) {
- log.debug("Number of glyphs in font: " + numberOfGlyphs);
- }
- readHorizontalHeader();
- readHorizontalMetrics();
- initAnsiWidths();
- readPostScript();
- readOS2();
- determineAscDesc();
- if (!isCFF) {
- readIndexToLocation();
- readGlyf();
- }
- readName();
- boolean pcltFound = readPCLT();
- // Read cmap table and fill in ansiwidths
- boolean valid = readCMAP();
- if (!valid) {
- return false;
- }
- // Create cmaps for bfentries
- createCMaps();
-
- if ( useKerning ) {
- readKerning();
- }
-
- // Read advanced typographic tables.
- if ( useAdvanced ) {
- try {
- OTFAdvancedTypographicTableReader atr
- = new OTFAdvancedTypographicTableReader ( this, in );
- atr.readAll();
- this.advancedTableReader = atr;
- } catch ( AdvancedTypographicTableFormatException e ) {
- log.warn (
- "Encountered format constraint violation in advanced (typographic) table (AT) "
- + "in font '" + getFullName() + "', ignoring AT data: "
- + e.getMessage()
- );
- }
- }
-
- guessVerticalMetricsFromGlyphBBox();
- return true;
- }
-
- /**
- * Reads a font.
- *
- * @param in FontFileReader to read from
- * @param name Name to be checked for in the font file
- * @param glyphs Map of glyphs (glyphs has old index as (Integer) key and
- * new index as (Integer) value)
- * @throws IOException in case of an I/O problem
- */
- public void readFont(FontFileReader in, String name,
- Map<Integer, Integer> glyphs) throws IOException {
- readFont(in, name);
- }
-
- private void createCMaps() {
- cmaps = new ArrayList<CMapSegment>();
- int unicodeStart;
- int glyphStart;
- int unicodeEnd;
-
- Iterator<UnicodeMapping> e = unicodeMappings.iterator();
- UnicodeMapping um = e.next();
- UnicodeMapping lastMapping = um;
-
- unicodeStart = um.getUnicodeIndex();
- glyphStart = um.getGlyphIndex();
-
- while (e.hasNext()) {
- um = e.next();
- if (((lastMapping.getUnicodeIndex() + 1) != um.getUnicodeIndex())
- || ((lastMapping.getGlyphIndex() + 1) != um.getGlyphIndex())) {
- unicodeEnd = lastMapping.getUnicodeIndex();
- cmaps.add(new CMapSegment(unicodeStart, unicodeEnd, glyphStart));
- unicodeStart = um.getUnicodeIndex();
- glyphStart = um.getGlyphIndex();
- }
- lastMapping = um;
- }
-
- unicodeEnd = lastMapping.getUnicodeIndex();
- cmaps.add(new CMapSegment(unicodeStart, unicodeEnd, glyphStart));
- }
-
- /**
- * Returns the PostScript name of the font.
- * @return String The PostScript name
- */
- public String getPostScriptName() {
- if (postScriptName.length() == 0) {
- return FontUtil.stripWhiteSpace(getFullName());
- } else {
- return postScriptName;
- }
- }
-
- PostScriptVersion getPostScriptVersion() {
- return postScriptVersion;
- }
-
- /**
- * Returns the font family names of the font.
- * @return Set The family names (a Set of Strings)
- */
- public Set<String> getFamilyNames() {
- return familyNames;
- }
-
- /**
- * Returns the font sub family name of the font.
- * @return String The sub family name
- */
- public String getSubFamilyName() {
- return subFamilyName;
- }
-
- /**
- * Returns the full name of the font.
- * @return String The full name
- */
- public String getFullName() {
- return fullName;
- }
-
- /**
- * Returns the name of the character set used.
- * @return String The caracter set
- */
- public String getCharSetName() {
- return encoding;
- }
-
- /**
- * Returns the CapHeight attribute of the font.
- * @return int The CapHeight
- */
- public int getCapHeight() {
- return convertTTFUnit2PDFUnit(capHeight);
- }
-
- /**
- * Returns the XHeight attribute of the font.
- * @return int The XHeight
- */
- public int getXHeight() {
- return convertTTFUnit2PDFUnit(xHeight);
- }
-
- /**
- * Returns the number of bytes necessary to pad the currentPosition so that a table begins
- * on a 4-byte boundary.
- * @param currentPosition the position to pad.
- * @return int the number of bytes to pad.
- */
- protected int getPadSize(int currentPosition) {
- int padSize = 4 - (currentPosition % 4);
- return padSize < 4 ? padSize : 0;
- }
-
- /**
- * Returns the Flags attribute of the font.
- * @return int The Flags
- */
- public int getFlags() {
- int flags = 32; // Use Adobe Standard charset
- if (italicAngle != 0) {
- flags |= 64;
- }
- if (isFixedPitch != 0) {
- flags |= 2;
- }
- if (hasSerifs) {
- flags |= 1;
- }
- return flags;
- }
-
- /**
- * Returns the weight class of this font. Valid values are 100, 200....,800, 900.
- * @return the weight class value (or 0 if there was no OS/2 table in the font)
- */
- public int getWeightClass() {
- return this.usWeightClass;
- }
-
- /**
- * Returns the StemV attribute of the font.
- * @return String The StemV
- */
- public String getStemV() {
- return "0";
- }
-
- /**
- * Returns the ItalicAngle attribute of the font.
- * @return String The ItalicAngle
- */
- public String getItalicAngle() {
- String ia = Short.toString((short)(italicAngle / 0x10000));
-
- // This is the correct italic angle, however only int italic
- // angles are supported at the moment so this is commented out.
- /*
- * if ((italicAngle % 0x10000) > 0 )
- * ia=ia+(comma+Short.toString((short)((short)((italicAngle % 0x10000)*1000)/0x10000)));
- */
- return ia;
- }
-
- /**
- * @return int[] The font bbox
- */
- public int[] getFontBBox() {
- final int[] fbb = new int[4];
- fbb[0] = convertTTFUnit2PDFUnit(fontBBox1);
- fbb[1] = convertTTFUnit2PDFUnit(fontBBox2);
- fbb[2] = convertTTFUnit2PDFUnit(fontBBox3);
- fbb[3] = convertTTFUnit2PDFUnit(fontBBox4);
-
- return fbb;
- }
-
- /**
- * Returns the LowerCaseAscent attribute of the font.
- * @return int The LowerCaseAscent
- */
- public int getLowerCaseAscent() {
- return convertTTFUnit2PDFUnit(ascender);
- }
-
- /**
- * Returns the LowerCaseDescent attribute of the font.
- * @return int The LowerCaseDescent
- */
- public int getLowerCaseDescent() {
- return convertTTFUnit2PDFUnit(descender);
- }
-
- /**
- * Returns the index of the last character, but this is for WinAnsiEncoding
- * only, so the last char is < 256.
- * @return short Index of the last character (<256)
- */
- public short getLastChar() {
- return lastChar;
- }
-
- /**
- * Returns the index of the first character.
- * @return short Index of the first character
- */
- public short getFirstChar() {
- return firstChar;
- }
-
- /**
- * Returns an array of character widths.
- * @return int[] The character widths
- */
- public int[] getWidths() {
- int[] wx = new int[mtxTab.length];
- for (int i = 0; i < wx.length; i++) {
- wx[i] = convertTTFUnit2PDFUnit(mtxTab[i].getWx());
- }
-
- return wx;
- }
-
- /**
- * Returns the width of a given character.
- * @param idx Index of the character
- * @return int Standard width
- */
- public int getCharWidth(int idx) {
- return convertTTFUnit2PDFUnit(ansiWidth[idx]);
- }
-
- /**
- * Returns the kerning table.
- * @return Map The kerning table
- */
- public Map<Integer, Map<Integer, Integer>> getKerning() {
- return kerningTab;
- }
-
- /**
- * Returns the ANSI kerning table.
- * @return Map The ANSI kerning table
- */
- public Map<Integer, Map<Integer, Integer>> getAnsiKerning() {
- return ansiKerningTab;
- }
-
- /**
- * Indicates if the font may be embedded.
- * @return boolean True if it may be embedded
- */
- public boolean isEmbeddable() {
- return isEmbeddable;
- }
-
- /**
- * Indicates whether or not the font is an OpenType
- * CFF font (rather than a TrueType font).
- * @return true if the font is in OpenType CFF format.
- */
- public boolean isCFF() {
- return this.isCFF;
- }
-
- /**
- * Read Table Directory from the current position in the
- * FontFileReader and fill the global HashMap dirTabs
- * with the table name (String) as key and a TTFDirTabEntry
- * as value.
- * @throws IOException in case of an I/O problem
- */
- protected void readDirTabs() throws IOException {
- int sfntVersion = fontFile.readTTFLong(); // TTF_FIXED_SIZE (4 bytes)
- switch (sfntVersion) {
- case 0x10000:
- log.debug("sfnt version: OpenType 1.0");
- break;
- case 0x4F54544F: //"OTTO"
- this.isCFF = true;
- log.debug("sfnt version: OpenType with CFF data");
- break;
- case 0x74727565: //"true"
- log.debug("sfnt version: Apple TrueType");
- break;
- case 0x74797031: //"typ1"
- log.debug("sfnt version: Apple Type 1 housed in sfnt wrapper");
- break;
- default:
- log.debug("Unknown sfnt version: " + Integer.toHexString(sfntVersion));
- break;
- }
- int ntabs = fontFile.readTTFUShort();
- fontFile.skip(6); // 3xTTF_USHORT_SIZE
-
- dirTabs = new HashMap<TTFTableName, TTFDirTabEntry>();
- TTFDirTabEntry[] pd = new TTFDirTabEntry[ntabs];
- log.debug("Reading " + ntabs + " dir tables");
-
- for (int i = 0; i < ntabs; i++) {
- pd[i] = new TTFDirTabEntry();
- String tableName = pd[i].read(fontFile);
- dirTabs.put(TTFTableName.getValue(tableName), pd[i]);
- }
- dirTabs.put(TTFTableName.TABLE_DIRECTORY,
- new TTFDirTabEntry(0L, fontFile.getCurrentPos()));
- log.debug("dir tables: " + dirTabs.keySet());
- }
-
- /**
- * Read the "head" table, this reads the bounding box and
- * sets the upem (unitsPerEM) variable
- * @throws IOException in case of an I/O problem
- */
- protected void readFontHeader() throws IOException {
- seekTab(fontFile, TTFTableName.HEAD, 2 * 4 + 2 * 4);
- int flags = fontFile.readTTFUShort();
- if (log.isDebugEnabled()) {
- log.debug("flags: " + flags + " - " + Integer.toString(flags, 2));
- }
- upem = fontFile.readTTFUShort();
- if (log.isDebugEnabled()) {
- log.debug("unit per em: " + upem);
- }
-
- fontFile.skip(16);
-
- fontBBox1 = fontFile.readTTFShort();
- fontBBox2 = fontFile.readTTFShort();
- fontBBox3 = fontFile.readTTFShort();
- fontBBox4 = fontFile.readTTFShort();
- if (log.isDebugEnabled()) {
- log.debug("font bbox: xMin=" + fontBBox1
- + " yMin=" + fontBBox2
- + " xMax=" + fontBBox3
- + " yMax=" + fontBBox4);
- }
-
- fontFile.skip(2 + 2 + 2);
-
- locaFormat = fontFile.readTTFShort();
- }
-
- /**
- * Read the number of glyphs from the "maxp" table
- * @throws IOException in case of an I/O problem
- */
- protected void getNumGlyphs() throws IOException {
- seekTab(fontFile, TTFTableName.MAXP, 4);
- numberOfGlyphs = fontFile.readTTFUShort();
- }
-
-
- /**
- * Read the "hhea" table to find the ascender and descender and
- * size of "hmtx" table, as a fixed size font might have only
- * one width.
- * @throws IOException in case of an I/O problem
- */
- protected void readHorizontalHeader()
- throws IOException {
- seekTab(fontFile, TTFTableName.HHEA, 4);
- hheaAscender = fontFile.readTTFShort();
- hheaDescender = fontFile.readTTFShort();
-
- fontFile.skip(2 + 2 + 3 * 2 + 8 * 2);
- nhmtx = fontFile.readTTFUShort();
-
- if (log.isDebugEnabled()) {
- log.debug("hhea.Ascender: " + formatUnitsForDebug(hheaAscender));
- log.debug("hhea.Descender: " + formatUnitsForDebug(hheaDescender));
- log.debug("Number of horizontal metrics: " + nhmtx);
- }
- }
-
- /**
- * Read "hmtx" table and put the horizontal metrics
- * in the mtxTab array. If the number of metrics is less
- * than the number of glyphs (eg fixed size fonts), extend
- * the mtxTab array and fill in the missing widths
- * @throws IOException in case of an I/O problem
- */
- protected void readHorizontalMetrics()
- throws IOException {
- seekTab(fontFile, TTFTableName.HMTX, 0);
-
- int mtxSize = Math.max(numberOfGlyphs, nhmtx);
- mtxTab = new TTFMtxEntry[mtxSize];
-
- if (log.isTraceEnabled()) {
- log.trace("*** Widths array: \n");
- }
- for (int i = 0; i < mtxSize; i++) {
- mtxTab[i] = new TTFMtxEntry();
- }
- for (int i = 0; i < nhmtx; i++) {
- mtxTab[i].setWx(fontFile.readTTFUShort());
- mtxTab[i].setLsb(fontFile.readTTFUShort());
-
- if (log.isTraceEnabled()) {
- log.trace(" width[" + i + "] = "
- + convertTTFUnit2PDFUnit(mtxTab[i].getWx()) + ";");
- }
- }
-
- if (nhmtx < mtxSize) {
- // Fill in the missing widths
- int lastWidth = mtxTab[nhmtx - 1].getWx();
- for (int i = nhmtx; i < mtxSize; i++) {
- mtxTab[i].setWx(lastWidth);
- mtxTab[i].setLsb(fontFile.readTTFUShort());
- }
- }
- }
-
-
- /**
- * Read the "post" table
- * containing the PostScript names of the glyphs.
- */
- private void readPostScript() throws IOException {
- seekTab(fontFile, TTFTableName.POST, 0);
- int postFormat = fontFile.readTTFLong();
- italicAngle = fontFile.readTTFULong();
- underlinePosition = fontFile.readTTFShort();
- underlineThickness = fontFile.readTTFShort();
- isFixedPitch = fontFile.readTTFULong();
-
- //Skip memory usage values
- fontFile.skip(4 * 4);
-
- log.debug("PostScript format: 0x" + Integer.toHexString(postFormat));
- switch (postFormat) {
- case 0x00010000:
- log.debug("PostScript format 1");
- postScriptVersion = PostScriptVersion.V1;
- for (int i = 0; i < MAC_GLYPH_ORDERING.length; i++) {
- mtxTab[i].setName(MAC_GLYPH_ORDERING[i]);
- }
- break;
- case 0x00020000:
- log.debug("PostScript format 2");
- postScriptVersion = PostScriptVersion.V2;
- int numGlyphStrings = 0;
-
- // Read Number of Glyphs
- int l = fontFile.readTTFUShort();
-
- // Read indexes
- for (int i = 0; i < l; i++) {
- mtxTab[i].setIndex(fontFile.readTTFUShort());
-
- if (mtxTab[i].getIndex() > 257) {
- //Index is not in the Macintosh standard set
- numGlyphStrings++;
- }
-
- if (log.isTraceEnabled()) {
- log.trace("PostScript index: " + mtxTab[i].getIndexAsString());
- }
- }
-
- // firstChar=minIndex;
- String[] psGlyphsBuffer = new String[numGlyphStrings];
- if (log.isDebugEnabled()) {
- log.debug("Reading " + numGlyphStrings
- + " glyphnames, that are not in the standard Macintosh"
- + " set. Total number of glyphs=" + l);
- }
- for (int i = 0; i < psGlyphsBuffer.length; i++) {
- psGlyphsBuffer[i] = fontFile.readTTFString(fontFile.readTTFUByte());
- }
-
- //Set glyph names
- for (int i = 0; i < l; i++) {
- if (mtxTab[i].getIndex() < MAC_GLYPH_ORDERING.length) {
- mtxTab[i].setName(MAC_GLYPH_ORDERING[mtxTab[i].getIndex()]);
- } else {
- if (!mtxTab[i].isIndexReserved()) {
- int k = mtxTab[i].getIndex() - MAC_GLYPH_ORDERING.length;
-
- if (log.isTraceEnabled()) {
- log.trace(k + " i=" + i + " mtx=" + mtxTab.length
- + " ps=" + psGlyphsBuffer.length);
- }
-
- mtxTab[i].setName(psGlyphsBuffer[k]);
- }
- }
- }
-
- break;
- case 0x00030000:
- // PostScript format 3 contains no glyph names
- log.debug("PostScript format 3");
- postScriptVersion = PostScriptVersion.V3;
- break;
- default:
- log.error("Unknown PostScript format: " + postFormat);
- postScriptVersion = PostScriptVersion.UNKNOWN;
- }
- }
-
-
- /**
- * Read the "OS/2" table
- */
- private void readOS2() throws IOException {
- // Check if font is embeddable
- TTFDirTabEntry os2Entry = dirTabs.get(TTFTableName.OS2);
- if (os2Entry != null) {
- seekTab(fontFile, TTFTableName.OS2, 0);
- int version = fontFile.readTTFUShort();
- if (log.isDebugEnabled()) {
- log.debug("OS/2 table: version=" + version
- + ", offset=" + os2Entry.getOffset() + ", len=" + os2Entry.getLength());
- }
- fontFile.skip(2); //xAvgCharWidth
- this.usWeightClass = fontFile.readTTFUShort();
-
- // usWidthClass
- fontFile.skip(2);
-
- int fsType = fontFile.readTTFUShort();
- if (fsType == 2) {
- isEmbeddable = false;
- } else {
- isEmbeddable = true;
- }
- fontFile.skip(11 * 2);
- fontFile.skip(10); //panose array
- fontFile.skip(4 * 4); //unicode ranges
- fontFile.skip(4);
- fontFile.skip(3 * 2);
- int v;
- os2Ascender = fontFile.readTTFShort(); //sTypoAscender
- os2Descender = fontFile.readTTFShort(); //sTypoDescender
- if (log.isDebugEnabled()) {
- log.debug("sTypoAscender: " + os2Ascender
- + " -> internal " + convertTTFUnit2PDFUnit(os2Ascender));
- log.debug("sTypoDescender: " + os2Descender
- + " -> internal " + convertTTFUnit2PDFUnit(os2Descender));
- }
- v = fontFile.readTTFShort(); //sTypoLineGap
- if (log.isDebugEnabled()) {
- log.debug("sTypoLineGap: " + v);
- }
- v = fontFile.readTTFUShort(); //usWinAscent
- if (log.isDebugEnabled()) {
- log.debug("usWinAscent: " + formatUnitsForDebug(v));
- }
- v = fontFile.readTTFUShort(); //usWinDescent
- if (log.isDebugEnabled()) {
- log.debug("usWinDescent: " + formatUnitsForDebug(v));
- }
-
- //version 1 OS/2 table might end here
- if (os2Entry.getLength() >= 78 + (2 * 4) + (2 * 2)) {
- fontFile.skip(2 * 4);
- this.os2xHeight = fontFile.readTTFShort(); //sxHeight
- this.os2CapHeight = fontFile.readTTFShort(); //sCapHeight
- if (log.isDebugEnabled()) {
- log.debug("sxHeight: " + this.os2xHeight);
- log.debug("sCapHeight: " + this.os2CapHeight);
- }
- }
-
- } else {
- isEmbeddable = true;
- }
- }
-
- /**
- * Read the "loca" table.
- * @throws IOException In case of a I/O problem
- */
- protected final void readIndexToLocation()
- throws IOException {
- if (!seekTab(fontFile, TTFTableName.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));
- }
-
- /**
- * Read the "glyf" table to find the bounding boxes.
- * @throws IOException In case of a I/O problem
- */
- private void readGlyf() throws IOException {
- TTFDirTabEntry dirTab = dirTabs.get(TTFTableName.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(TTFTableName.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));
- }
- }
- }
-
- /**
- * Read the "name" table.
- * @throws IOException In case of a I/O problem
- */
- private void readName() throws IOException {
- seekTab(fontFile, TTFTableName.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 "PCLT" table to find xHeight and capHeight.
- * @throws IOException In case of a I/O problem
- */
- private boolean readPCLT() throws IOException {
- TTFDirTabEntry dirTab = dirTabs.get(TTFTableName.PCLT);
- if (dirTab != null) {
- fontFile.seekSet(dirTab.getOffset() + 4 + 4 + 2);
- xHeight = fontFile.readTTFUShort();
- log.debug("xHeight from PCLT: " + formatUnitsForDebug(xHeight));
- fontFile.skip(2 * 2);
- capHeight = fontFile.readTTFUShort();
- log.debug("capHeight from PCLT: " + formatUnitsForDebug(capHeight));
- fontFile.skip(2 + 16 + 8 + 6 + 1 + 1);
-
- int serifStyle = fontFile.readTTFUByte();
- serifStyle = serifStyle >> 6;
- serifStyle = serifStyle & 3;
- if (serifStyle == 1) {
- hasSerifs = false;
- } else {
- hasSerifs = true;
- }
- return true;
- } else {
- return false;
- }
- }
-
- /**
- * Determines the right source for the ascender and descender values. The problem here is
- * that the interpretation of these values is not the same for every font. There doesn't seem
- * to be a uniform definition of an ascender and a descender. In some fonts
- * the hhea values are defined after the Apple interpretation, but not in every font. The
- * same problem is in the OS/2 table. FOP needs the ascender and descender to determine the
- * baseline so we need values which add up more or less to the "em box". However, due to
- * accent modifiers a character can grow beyond the em box.
- */
- private void determineAscDesc() {
- int hheaBoxHeight = hheaAscender - hheaDescender;
- int os2BoxHeight = os2Ascender - os2Descender;
- if (os2Ascender > 0 && os2BoxHeight <= upem) {
- ascender = os2Ascender;
- descender = os2Descender;
- } else if (hheaAscender > 0 && hheaBoxHeight <= upem) {
- ascender = hheaAscender;
- descender = hheaDescender;
- } else {
- if (os2Ascender > 0) {
- //Fall back to info from OS/2 if possible
- ascender = os2Ascender;
- descender = os2Descender;
- } else {
- ascender = hheaAscender;
- descender = hheaDescender;
- }
- }
-
- if (log.isDebugEnabled()) {
- log.debug("Font box height: " + (ascender - descender));
- if (ascender - descender > upem) {
- log.debug("Ascender and descender together are larger than the em box.");
- }
- }
- }
-
- private void guessVerticalMetricsFromGlyphBBox() {
- // Approximate capHeight from height of "H"
- // It's most unlikely that a font misses the PCLT table
- // This also assumes that postscriptnames exists ("H")
- // Should look it up in the cmap (that wouldn't help
- // for charsets without H anyway...)
- // Same for xHeight with the letter "x"
- int localCapHeight = 0;
- int localXHeight = 0;
- int localAscender = 0;
- int localDescender = 0;
- for (int i = 0; i < mtxTab.length; i++) {
- if ("H".equals(mtxTab[i].getName())) {
- localCapHeight = mtxTab[i].getBoundingBox()[3];
- } else if ("x".equals(mtxTab[i].getName())) {
- localXHeight = mtxTab[i].getBoundingBox()[3];
- } else if ("d".equals(mtxTab[i].getName())) {
- localAscender = mtxTab[i].getBoundingBox()[3];
- } else if ("p".equals(mtxTab[i].getName())) {
- localDescender = mtxTab[i].getBoundingBox()[1];
- } else {
- // OpenType Fonts with a version 3.0 "post" table don't have glyph names.
- // Use Unicode indices instead.
- List unicodeIndex = mtxTab[i].getUnicodeIndex();
- if (unicodeIndex.size() > 0) {
- //Only the first index is used
- char ch = (char)((Integer)unicodeIndex.get(0)).intValue();
- if (ch == 'H') {
- localCapHeight = mtxTab[i].getBoundingBox()[3];
- } else if (ch == 'x') {
- localXHeight = mtxTab[i].getBoundingBox()[3];
- } else if (ch == 'd') {
- localAscender = mtxTab[i].getBoundingBox()[3];
- } else if (ch == 'p') {
- localDescender = mtxTab[i].getBoundingBox()[1];
- }
- }
- }
- }
- if (log.isDebugEnabled()) {
- log.debug("Ascender from glyph 'd': " + formatUnitsForDebug(localAscender));
- log.debug("Descender from glyph 'p': " + formatUnitsForDebug(localDescender));
- }
- if (ascender - descender > upem) {
- log.debug("Replacing specified ascender/descender with derived values to get values"
- + " which fit in the em box.");
- ascender = localAscender;
- descender = localDescender;
- }
-
- if (log.isDebugEnabled()) {
- log.debug("xHeight from glyph 'x': " + formatUnitsForDebug(localXHeight));
- log.debug("CapHeight from glyph 'H': " + formatUnitsForDebug(localCapHeight));
- }
- if (capHeight == 0) {
- capHeight = localCapHeight;
- if (capHeight == 0) {
- capHeight = os2CapHeight;
- }
- if (capHeight == 0) {
- log.debug("capHeight value could not be determined."
- + " The font may not work as expected.");
- }
- }
- if (xHeight == 0) {
- xHeight = localXHeight;
- if (xHeight == 0) {
- xHeight = os2xHeight;
- }
- if (xHeight == 0) {
- log.debug("xHeight value could not be determined."
- + " The font may not work as expected.");
- }
- }
- }
-
- /**
- * Read the kerning table, create a table for both CIDs and
- * winAnsiEncoding.
- * @throws IOException In case of a I/O problem
- */
- private void readKerning() throws IOException {
- // Read kerning
- kerningTab = new HashMap<Integer, Map<Integer, Integer>>();
- ansiKerningTab = new HashMap<Integer, Map<Integer, Integer>>();
- TTFDirTabEntry dirTab = dirTabs.get(TTFTableName.KERN);
- if (dirTab != null) {
- seekTab(fontFile, TTFTableName.KERN, 2);
- for (int n = fontFile.readTTFUShort(); n > 0; n--) {
- fontFile.skip(2 * 2);
- int k = fontFile.readTTFUShort();
- if (!((k & 1) != 0) || (k & 2) != 0 || (k & 4) != 0) {
- return;
- }
- if ((k >> 8) != 0) {
- continue;
- }
-
- k = fontFile.readTTFUShort();
- fontFile.skip(3 * 2);
- while (k-- > 0) {
- int i = fontFile.readTTFUShort();
- int j = fontFile.readTTFUShort();
- int kpx = fontFile.readTTFShort();
- if (kpx != 0) {
- // CID kerning table entry, using unicode indexes
- final Integer iObj = glyphToUnicode(i);
- final Integer u2 = glyphToUnicode(j);
- if (iObj == null) {
- // happens for many fonts (Ubuntu font set),
- // stray entries in the kerning table??
- log.debug("Ignoring kerning pair because no Unicode index was"
- + " found for the first glyph " + i);
- } else if (u2 == null) {
- log.debug("Ignoring kerning pair because Unicode index was"
- + " found for the second glyph " + i);
- } else {
- Map<Integer, Integer> adjTab = kerningTab.get(iObj);
- if (adjTab == null) {
- adjTab = new HashMap<Integer, Integer>();
- }
- adjTab.put(u2, new Integer(convertTTFUnit2PDFUnit(kpx)));
- kerningTab.put(iObj, adjTab);
- }
- }
- }
- }
-
- // Create winAnsiEncoded kerning table from kerningTab
- // (could probably be simplified, for now we remap back to CID indexes and
- // then to winAnsi)
- for (Integer unicodeKey1 : kerningTab.keySet()) {
- Integer cidKey1 = unicodeToGlyph(unicodeKey1.intValue());
- Map<Integer, Integer> akpx = new HashMap<Integer, Integer>();
- Map<Integer, Integer> ckpx = kerningTab.get(unicodeKey1);
-
- for (Integer unicodeKey2 : ckpx.keySet()) {
- Integer cidKey2 = unicodeToGlyph(unicodeKey2.intValue());
- Integer kern = (Integer)ckpx.get(unicodeKey2);
-
- Iterator uniMap = mtxTab[cidKey2.intValue()].getUnicodeIndex().listIterator();
- while (uniMap.hasNext()) {
- Integer unicodeKey = (Integer)uniMap.next();
- Integer[] ansiKeys = unicodeToWinAnsi(unicodeKey.intValue());
- for (int u = 0; u < ansiKeys.length; u++) {
- akpx.put(ansiKeys[u], kern);
- }
- }
- }
-
- if (akpx.size() > 0) {
- Iterator uniMap = mtxTab[cidKey1.intValue()].getUnicodeIndex().listIterator();
- while (uniMap.hasNext()) {
- Integer unicodeKey = (Integer)uniMap.next();
- Integer[] ansiKeys = unicodeToWinAnsi(unicodeKey.intValue());
- for (int u = 0; u < ansiKeys.length; u++) {
- ansiKerningTab.put(ansiKeys[u], akpx);
- }
- }
- }
- }
- }
- }
-
- /**
- * Streams a font.
- * @param ttfOut The interface for streaming TrueType tables.
- * @exception IOException file write error
- */
- public void stream(TTFOutputStream ttfOut) throws IOException {
- SortedSet<Map.Entry<TTFTableName, TTFDirTabEntry>> sortedDirTabs = sortDirTabMap(dirTabs);
- byte[] file = fontFile.getAllBytes();
- TTFTableOutputStream tableOut = ttfOut.getTableOutputStream();
- TTFGlyphOutputStream glyphOut = ttfOut.getGlyphOutputStream();
- ttfOut.startFontStream();
- for (Map.Entry<TTFTableName, TTFDirTabEntry> entry : sortedDirTabs) {
- int offset = (int) entry.getValue().getOffset();
- int paddedLength = (int) entry.getValue().getLength();
- paddedLength += getPadSize(offset + paddedLength);
- if (entry.getKey().equals(TTFTableName.GLYF)) {
- streamGlyf(glyphOut, file, offset, paddedLength);
- } else {
- tableOut.streamTable(file, offset, paddedLength);
- }
- }
- ttfOut.endFontStream();
- }
-
- private void streamGlyf(TTFGlyphOutputStream glyphOut, byte[] fontFile, int tableOffset,
- int tableLength) throws IOException {
- //Stream all but the last glyph
- int glyphStart = 0;
- int glyphEnd = 0;
- glyphOut.startGlyphStream();
- for (int i = 0; i < mtxTab.length - 1; i++) {
- glyphStart = (int) mtxTab[i].getOffset() + tableOffset;
- glyphEnd = (int) mtxTab[i + 1].getOffset() + tableOffset;
- glyphOut.streamGlyph(fontFile, glyphStart, glyphEnd - glyphStart);
- }
- glyphOut.streamGlyph(fontFile, glyphEnd, (tableOffset + tableLength) - glyphEnd);
- glyphOut.endGlyphStream();
- }
-
- /**
- * Returns the order in which the tables in a TrueType font should be written to file.
- * @param directoryTabs the map that is to be sorted.
- * @return TTFTablesNames[] an array of table names sorted in the order they should appear in
- * the TTF file.
- */
- SortedSet<Map.Entry<TTFTableName, TTFDirTabEntry>>
- sortDirTabMap(Map<TTFTableName, TTFDirTabEntry> directoryTabs) {
- SortedSet<Map.Entry<TTFTableName, TTFDirTabEntry>> sortedSet
- = new TreeSet<Map.Entry<TTFTableName, TTFDirTabEntry>>(
- new Comparator<Map.Entry<TTFTableName, TTFDirTabEntry>>() {
-
- public int compare(Entry<TTFTableName, TTFDirTabEntry> o1,
- Entry<TTFTableName, TTFDirTabEntry> o2) {
- return (int) (o1.getValue().getOffset() - o2.getValue().getOffset());
- }
- });
- sortedSet.addAll(directoryTabs.entrySet());
- return sortedSet;
- }
-
- /**
- * Returns this font's character to glyph mapping.
- *
- * @return the font's cmap
- */
- public List<CMapSegment> getCMaps() {
- return cmaps;
- }
-
- /**
- * Check if this is a TrueType collection and that the given
- * name exists in the collection.
- * If it does, set offset in fontfile to the beginning of
- * the Table Directory for that font.
- * @param name The name to check
- * @return True if not collection or font name present, false otherwise
- * @throws IOException In case of an I/O problem
- */
- protected final boolean checkTTC(String name) throws IOException {
- String tag = fontFile.readTTFString(4);
-
- if ("ttcf".equals(tag)) {
- // This is a TrueType Collection
- fontFile.skip(4);
-
- // Read directory offsets
- int numDirectories = (int)fontFile.readTTFULong();
- // int numDirectories=in.readTTFUShort();
- long[] dirOffsets = new long[numDirectories];
- for (int i = 0; i < numDirectories; i++) {
- dirOffsets[i] = fontFile.readTTFULong();
- }
-
- log.info("This is a TrueType collection file with "
- + numDirectories + " fonts");
- log.info("Containing the following fonts: ");
- // Read all the directories and name tables to check
- // If the font exists - this is a bit ugly, but...
- boolean found = false;
-
- // Iterate through all name tables even if font
- // Is found, just to show all the names
- long dirTabOffset = 0;
- for (int i = 0; (i < numDirectories); i++) {
- fontFile.seekSet(dirOffsets[i]);
- readDirTabs();
-
- readName();
-
- if (fullName.equals(name)) {
- found = true;
- dirTabOffset = dirOffsets[i];
- log.info(fullName + " <-- selected");
- } else {
- log.info(fullName);
- }
-
- // Reset names
- notice = "";
- fullName = "";
- familyNames.clear();
- postScriptName = "";
- subFamilyName = "";
- }
-
- fontFile.seekSet(dirTabOffset);
- return found;
- } else {
- fontFile.seekSet(0);
- return true;
- }
- }
-
- /**
- * Return TTC font names
- * @param in FontFileReader to read from
- * @return True if not collection or font name present, false otherwise
- * @throws IOException In case of an I/O problem
- */
- public final List<String> getTTCnames(FontFileReader in) throws IOException {
- List<String> fontNames = new ArrayList<String>();
- String tag = in.readTTFString(4);
-
- if ("ttcf".equals(tag)) {
- // This is a TrueType Collection
- in.skip(4);
-
- // Read directory offsets
- int numDirectories = (int)in.readTTFULong();
- long[] dirOffsets = new long[numDirectories];
- for (int i = 0; i < numDirectories; i++) {
- dirOffsets[i] = in.readTTFULong();
- }
-
- log.info("This is a TrueType collection file with "
- + numDirectories + " fonts");
- log.info("Containing the following fonts: ");
-
- for (int i = 0; (i < numDirectories); i++) {
- in.seekSet(dirOffsets[i]);
- readDirTabs();
-
- readName();
-
- log.info(fullName);
- fontNames.add(fullName);
-
- // Reset names
- notice = "";
- fullName = "";
- familyNames.clear();
- postScriptName = "";
- subFamilyName = "";
- }
-
- in.seekSet(0);
- return fontNames;
- } else {
- log.error("Not a TTC!");
- return null;
- }
- }
-
- /*
- * Helper classes, they are not very efficient, but that really
- * doesn't matter...
- */
- private Integer[] unicodeToWinAnsi(int unicode) {
- List<Integer> ret = new ArrayList<Integer>();
- for (int i = 32; i < Glyphs.WINANSI_ENCODING.length; i++) {
- if (unicode == Glyphs.WINANSI_ENCODING[i]) {
- ret.add(new Integer(i));
- }
- }
- return ret.toArray(new Integer[0]);
- }
-
- /**
- * Dumps a few informational values to System.out.
- */
- public void printStuff() {
- System.out.println("Font name: " + postScriptName);
- System.out.println("Full name: " + fullName);
- System.out.println("Family name: " + familyNames);
- System.out.println("Subfamily name: " + subFamilyName);
- System.out.println("Notice: " + notice);
- System.out.println("xHeight: " + convertTTFUnit2PDFUnit(xHeight));
- System.out.println("capheight: " + convertTTFUnit2PDFUnit(capHeight));
-
- int italic = (int)(italicAngle >> 16);
- System.out.println("Italic: " + italic);
- System.out.print("ItalicAngle: " + (short)(italicAngle / 0x10000));
- if ((italicAngle % 0x10000) > 0) {
- System.out.print("."
- + (short)((italicAngle % 0x10000) * 1000)
- / 0x10000);
- }
- System.out.println();
- System.out.println("Ascender: " + convertTTFUnit2PDFUnit(ascender));
- System.out.println("Descender: " + convertTTFUnit2PDFUnit(descender));
- System.out.println("FontBBox: [" + convertTTFUnit2PDFUnit(fontBBox1)
- + " " + convertTTFUnit2PDFUnit(fontBBox2) + " "
- + convertTTFUnit2PDFUnit(fontBBox3) + " "
- + convertTTFUnit2PDFUnit(fontBBox4) + "]");
- }
-
- private String formatUnitsForDebug(int units) {
- return units + " -> " + convertTTFUnit2PDFUnit(units) + " internal units";
- }
-
- /**
- * Map a glyph index to the corresponding unicode code point
- *
- * @param glyphIndex
- * @return unicode code point
- */
- private Integer glyphToUnicode(int glyphIndex) {
- return glyphToUnicodeMap.get(new Integer(glyphIndex));
- }
-
- /**
- * Map a unicode code point to the corresponding glyph index
- *
- * @param unicodeIndex unicode code point
- * @return glyph index
- */
- private Integer unicodeToGlyph(int unicodeIndex) throws IOException {
- final Integer result
- = unicodeToGlyphMap.get(new Integer(unicodeIndex));
- if (result == null) {
- throw new IOException(
- "Glyph index not found for unicode value " + unicodeIndex);
- }
- return result;
- }
-
- String getGlyphName(int glyphIndex) {
- return mtxTab[glyphIndex].getName();
- }
-
- /**
- * Determine if advanced (typographic) table is present.
- * @return true if advanced (typographic) table is present
- */
- public boolean hasAdvancedTable() {
- if ( advancedTableReader != null ) {
- return advancedTableReader.hasAdvancedTable();
- } else {
- return false;
- }
- }
-
- /**
- * Returns the GDEF table or null if none present.
- * @return the GDEF table
- */
- public GlyphDefinitionTable getGDEF() {
- if ( advancedTableReader != null ) {
- return advancedTableReader.getGDEF();
- } else {
- return null;
- }
- }
-
- /**
- * Returns the GSUB table or null if none present.
- * @return the GSUB table
- */
- public GlyphSubstitutionTable getGSUB() {
- if ( advancedTableReader != null ) {
- return advancedTableReader.getGSUB();
- } else {
- return null;
- }
- }
-
- /**
- * Returns the GPOS table or null if none present.
- * @return the GPOS table
- */
- public GlyphPositioningTable getGPOS() {
- if ( advancedTableReader != null ) {
- return advancedTableReader.getGPOS();
- } else {
- return null;
- }
- }
-
- /**
- * Static main method to get info about a TrueType font.
- * @param args The command line arguments
- */
- public static void main(String[] args) {
- try {
- boolean useKerning = true;
- boolean useAdvanced = true;
- TTFFile ttfFile = new TTFFile(useKerning, useAdvanced);
-
- FontFileReader reader = new FontFileReader(args[0]);
-
- String name = null;
- if (args.length >= 2) {
- name = args[1];
- }
-
- ttfFile.readFont(reader, name);
- ttfFile.printStuff();
-
- } catch (IOException ioe) {
- System.err.println("Problem reading font: " + ioe.toString());
- ioe.printStackTrace(System.err);
- }
- }
- }
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