123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771 |
- /*
- * 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.afp.fonts;
-
- import java.awt.Rectangle;
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.MalformedURLException;
- import java.net.URI;
- import java.net.URISyntaxException;
- import java.util.ArrayList;
- import java.util.Collections;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
- import java.util.WeakHashMap;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.image.loader.util.SoftMapCache;
-
- import org.apache.fop.afp.AFPConstants;
- import org.apache.fop.afp.AFPEventProducer;
- import org.apache.fop.afp.util.AFPResourceAccessor;
- import org.apache.fop.afp.util.StructuredFieldReader;
- import org.apache.fop.apps.io.InternalResourceResolver;
- import org.apache.fop.fonts.Typeface;
-
- /**
- * The CharacterSetBuilder is responsible building the a CharacterSet instance that holds
- * the font metric data. The data is either read from disk and passed to a CharacterSet (*)
- * or a FopCharacterSet is instantiated that is composed of a Typeface instance configured
- * with this data.<br>
- * -*- For referenced fonts CharacterSetBuilder is responsible for reading the font attributes
- * from binary code page files and the character set metric files. In IBM font structure, a
- * code page maps each character of text to the characters in a character set.
- * Each character is translated into a code point. When the character is
- * printed, each code point is matched to a character ID on the code page
- * specified. The character ID is then matched to the image (raster pattern or
- * outline pattern) of the character in the character set specified. The image
- * in the character set is the image that is printed in the document. To be a
- * valid code page for a particular character set, all character IDs in the code
- * page must be included in that character set.<br>
- * This class will read the font information from the binary code page files and character
- * set metric files in order to determine the correct metrics to use when rendering the
- * formatted object.
- */
- public abstract class CharacterSetBuilder {
-
- /**
- * Static logging instance
- */
- protected static final Log LOG = LogFactory.getLog(CharacterSetBuilder.class);
-
- /**
- * Template used to convert lists to arrays.
- */
- private static final CharacterSetOrientation[] EMPTY_CSO_ARRAY = new CharacterSetOrientation[0];
-
- /** Codepage MO:DCA structured field. */
- private static final byte[] CODEPAGE_SF = new byte[] {
- (byte) 0xD3, (byte) 0xA8, (byte) 0x87};
-
- /** Character table MO:DCA structured field. */
- private static final byte[] CHARACTER_TABLE_SF = new byte[] {
- (byte) 0xD3, (byte) 0x8C, (byte) 0x87};
-
- /** Font descriptor MO:DCA structured field. */
- private static final byte[] FONT_DESCRIPTOR_SF = new byte[] {
- (byte) 0xD3, (byte) 0xA6, (byte) 0x89 };
-
- /** Font control MO:DCA structured field. */
- private static final byte[] FONT_CONTROL_SF = new byte[] {
- (byte) 0xD3, (byte) 0xA7, (byte) 0x89 };
-
- /** Font orientation MO:DCA structured field. */
- private static final byte[] FONT_ORIENTATION_SF = new byte[] {
- (byte) 0xD3, (byte) 0xAE, (byte) 0x89 };
-
- /** Font position MO:DCA structured field. */
- private static final byte[] FONT_POSITION_SF = new byte[] {
- (byte) 0xD3, (byte) 0xAC, (byte) 0x89 };
-
- /** Font index MO:DCA structured field. */
- private static final byte[] FONT_INDEX_SF = new byte[] {
- (byte) 0xD3, (byte) 0x8C, (byte) 0x89 };
-
- /**
- * The collection of code pages
- */
- private final Map<String, Map<String, String>> codePagesCache
- = Collections.synchronizedMap(new WeakHashMap<String, Map<String, String>>());
-
- /**
- * Cache of charactersets
- */
- private final SoftMapCache characterSetsCache = new SoftMapCache(true);
-
- /** Default constructor. */
- private CharacterSetBuilder() {
- }
-
- /**
- * Factory method for the single-byte implementation of AFPFontReader.
- * @return AFPFontReader
- */
- public static CharacterSetBuilder getSingleByteInstance() {
- return SingleByteLoader.getInstance();
- }
-
- /**
- * Factory method for the double-byte (CID Keyed font (Type 0)) implementation of AFPFontReader.
- * @return AFPFontReader
- */
- public static CharacterSetBuilder getDoubleByteInstance() {
- return DoubleByteLoader.getInstance();
- }
-
-
- /**
- * Returns an InputStream to a given file path and filename
- *
- * @param accessor the resource accessor
- * @param uriStr the URI
- * @param eventProducer for handling AFP related events
- * @return an inputStream
- * @throws IOException in the event that an I/O exception of some sort has occurred
- */
- private InputStream openInputStream(AFPResourceAccessor accessor, String uriStr,
- AFPEventProducer eventProducer)
- throws IOException {
- URI uri;
- try {
- uri = InternalResourceResolver.cleanURI(uriStr.trim());
- } catch (URISyntaxException e) {
- throw new MalformedURLException("Invalid uri: " + uriStr + " (" + e.getMessage() + ")");
- }
- if (LOG.isDebugEnabled()) {
- LOG.debug("Opening " + uri);
- }
- return accessor.createInputStream(uri);
- }
-
- /**
- * Closes the inputstream
- *
- * @param inputStream the inputstream to close
- */
- private void closeInputStream(InputStream inputStream) {
- try {
- if (inputStream != null) {
- inputStream.close();
- }
- } catch (Exception ex) {
- // Lets log at least!
- LOG.error(ex.getMessage());
- }
- }
-
- /**
- * Load the font details and metrics into the CharacterSetMetric object, this will use the
- * actual afp code page and character set files to load the object with the necessary metrics.
- *
- * @param characterSetName name of the characterset
- * @param codePageName name of the code page file
- * @param encoding encoding name
- * @param accessor used to load codepage and characterset
- * @param eventProducer for handling AFP related events
- * @return CharacterSet object
- * @throws IOException if an I/O error occurs
- */
- public CharacterSet buildSBCS(String characterSetName, String codePageName, String encoding,
- AFPResourceAccessor accessor, AFPEventProducer eventProducer) throws IOException {
- return processFont(characterSetName, codePageName, encoding, CharacterSetType.SINGLE_BYTE,
- accessor, eventProducer);
- }
-
- /**
- * Load the font details and metrics into the CharacterSetMetric object, this will use the
- * actual afp code page and character set files to load the object with the necessary metrics.
- * This method is to be used for double byte character sets (DBCS).
- *
- * @param characterSetName name of the characterset
- * @param codePageName name of the code page file
- * @param encoding encoding name
- * @param charsetType the characterset type
- * @param accessor used to load codepage and characterset
- * @param eventProducer for handling AFP related events
- * @return CharacterSet object
- * @throws IOException if an I/O error occurs
- */
- public CharacterSet buildDBCS(String characterSetName, String codePageName, String encoding,
- CharacterSetType charsetType, AFPResourceAccessor accessor, AFPEventProducer eventProducer)
- throws IOException {
- return processFont(characterSetName, codePageName, encoding, charsetType, accessor,
- eventProducer);
- }
-
- /**
- * Load the font details and metrics into the CharacterSetMetric object, this will use the
- * actual afp code page and character set files to load the object with the necessary metrics.
- *
- * @param characterSetName the CharacterSetMetric object to populate
- * @param codePageName the name of the code page to use
- * @param encoding name of the encoding in use
- * @param typeface base14 font name
- * @param eventProducer for handling AFP related events
- * @return CharacterSet object
- * @throws IOException if an I/O error occurs
- */
- public CharacterSet build(String characterSetName, String codePageName, String encoding,
- Typeface typeface, AFPEventProducer eventProducer) throws IOException {
- return new FopCharacterSet(codePageName, encoding, characterSetName, typeface,
- eventProducer);
- }
-
- public CharacterSet build(String characterSetName, String codePageName, String encoding,
- Typeface typeface, AFPResourceAccessor accessor, AFPEventProducer eventProducer)
- throws IOException {
- return new FopCharacterSet(codePageName, encoding, characterSetName, typeface, accessor, eventProducer);
- }
-
- private CharacterSet processFont(String characterSetName, String codePageName, String encoding,
- CharacterSetType charsetType, AFPResourceAccessor accessor, AFPEventProducer eventProducer)
- throws IOException {
- // check for cached version of the characterset
- URI charSetURI = accessor.resolveURI(characterSetName);
- String cacheKey = charSetURI.toASCIIString() + "_" + characterSetName + "_" + codePageName;
- CharacterSet characterSet = (CharacterSet) characterSetsCache.get(cacheKey);
- if (characterSet != null) {
- return characterSet;
- }
-
- // characterset not in the cache, so recreating
- characterSet = new CharacterSet(codePageName, encoding, charsetType, characterSetName,
- accessor, eventProducer);
-
- InputStream inputStream = null;
-
- try {
-
- /**
- * Get the code page which contains the character mapping
- * information to map the unicode character id to the graphic
- * chracter global identifier.
- */
- Map<String, String> codePage;
- // TODO: This could have performance implications if several threads want to use the
- // codePagesCache to retrieve different codepages.
- synchronized (codePagesCache) {
- codePage = codePagesCache.get(codePageName);
-
- if (codePage == null) {
- codePage = loadCodePage(codePageName, encoding, accessor, eventProducer);
- codePagesCache.put(codePageName, codePage);
- }
- }
-
- inputStream = openInputStream(accessor, characterSetName, eventProducer);
-
- StructuredFieldReader structuredFieldReader = new StructuredFieldReader(inputStream);
-
- // Process D3A689 Font Descriptor
- FontDescriptor fontDescriptor = processFontDescriptor(structuredFieldReader);
- characterSet.setNominalVerticalSize(fontDescriptor.getNominalFontSizeInMillipoints());
-
- // Process D3A789 Font Control
- FontControl fontControl = processFontControl(structuredFieldReader);
-
- if (fontControl != null) {
- //process D3AE89 Font Orientation
- CharacterSetOrientation[] characterSetOrientations
- = processFontOrientation(structuredFieldReader);
-
- double metricNormalizationFactor;
- if (fontControl.isRelative()) {
- metricNormalizationFactor = 1;
- } else {
- int dpi = fontControl.getDpi();
- metricNormalizationFactor = 1000.0d * 72000.0d
- / fontDescriptor.getNominalFontSizeInMillipoints() / dpi;
- }
- ValueNormalizer normalizer = new ValueNormalizer(metricNormalizationFactor);
- //process D3AC89 Font Position
- processFontPosition(structuredFieldReader, characterSetOrientations, normalizer);
- //process D38C89 Font Index (per orientation)
- for (int i = 0; i < characterSetOrientations.length; i++) {
- CharacterSetOrientation characterSetOrientation = characterSetOrientations[i];
- processFontIndex(structuredFieldReader, characterSetOrientation, codePage, normalizer);
- characterSet.addCharacterSetOrientation(characterSetOrientation);
- }
- } else {
- throw new IOException("Missing D3AE89 Font Control structured field.");
- }
-
- } finally {
- closeInputStream(inputStream);
- }
- characterSetsCache.put(cacheKey, characterSet);
- return characterSet;
- }
-
- private static class ValueNormalizer {
-
- private final double factor;
-
- public ValueNormalizer(double factor) {
- this.factor = factor;
- }
-
- public int normalize(int value) {
- return (int) Math.round(value * factor);
- }
- }
-
- /**
- * Load the code page information from the appropriate file. The file name
- * to load is determined by the code page name and the file extension 'CDP'.
- *
- * @param codePage
- * the code page identifier
- * @param encoding
- * the encoding to use for the character decoding
- * @param accessor the resource accessor
- * @param eventProducer for handling AFP related events
- * @return a code page mapping (key: GCGID, value: Unicode character)
- * @throws IOException if an I/O exception of some sort has occurred.
- */
- protected Map<String, String> loadCodePage(String codePage, String encoding,
- AFPResourceAccessor accessor, AFPEventProducer eventProducer) throws IOException {
-
- // Create the HashMap to store code page information
- Map<String, String> codePages = new HashMap<String, String>();
-
- InputStream inputStream = null;
- try {
- inputStream = openInputStream(accessor, codePage.trim(), eventProducer);
- } catch (IOException e) {
- eventProducer.codePageNotFound(this, e);
- throw e;
- }
- try {
- StructuredFieldReader structuredFieldReader = new StructuredFieldReader(inputStream);
- byte[] data = structuredFieldReader.getNext(CHARACTER_TABLE_SF);
-
- int position = 0;
- byte[] gcgiBytes = new byte[8];
- byte[] charBytes = new byte[1];
-
- // Read data, ignoring bytes 0 - 2
- for (int index = 3; index < data.length; index++) {
- if (position < 8) {
- // Build the graphic character global identifier key
- gcgiBytes[position] = data[index];
- position++;
- } else if (position == 9) {
- position = 0;
- // Set the character
- charBytes[0] = data[index];
- String gcgiString = new String(gcgiBytes,
- AFPConstants.EBCIDIC_ENCODING);
- //Use the 8-bit char index to find the Unicode character using the Java encoding
- //given in the configuration. If the code page and the Java encoding don't
- //match, a wrong Unicode character will be associated with the AFP GCGID.
- //Idea: we could use IBM's GCGID to Unicode map and build code pages ourselves.
- String charString = new String(charBytes, encoding);
- codePages.put(gcgiString, charString);
- } else {
- position++;
- }
- }
- } finally {
- closeInputStream(inputStream);
- }
-
- return codePages;
- }
-
- /**
- * Process the font descriptor details using the structured field reader.
- *
- * @param structuredFieldReader the structured field reader
- * @return a class representing the font descriptor
- * @throws IOException if an I/O exception of some sort has occurred.
- */
- private static FontDescriptor processFontDescriptor(
- StructuredFieldReader structuredFieldReader) throws IOException {
-
- byte[] fndData = structuredFieldReader.getNext(FONT_DESCRIPTOR_SF);
- return new FontDescriptor(fndData);
- }
-
- /**
- * Process the font control details using the structured field reader.
- *
- * @param structuredFieldReader
- * the structured field reader
- * @return the FontControl
- * @throws IOException if an I/O exception of some sort has occurred.
- */
- private FontControl processFontControl(StructuredFieldReader structuredFieldReader)
- throws IOException {
-
- byte[] fncData = structuredFieldReader.getNext(FONT_CONTROL_SF);
-
- FontControl fontControl = null;
- if (fncData != null) {
- fontControl = new FontControl();
-
- if (fncData[7] == (byte) 0x02) {
- fontControl.setRelative(true);
- }
- int metricResolution = getUBIN(fncData, 9);
- if (metricResolution == 1000) {
- //Special case: 1000 units per em (rather than dpi)
- fontControl.setUnitsPerEm(1000);
- } else {
- fontControl.setDpi(metricResolution / 10);
- }
- }
- return fontControl;
- }
-
- /**
- * Process the font orientation details from using the structured field
- * reader.
- *
- * @param structuredFieldReader
- * the structured field reader
- * @return CharacterSetOrientation array
- * @throws IOException if an I/O exception of some sort has occurred.
- */
- private CharacterSetOrientation[] processFontOrientation(
- StructuredFieldReader structuredFieldReader) throws IOException {
-
- byte[] data = structuredFieldReader.getNext(FONT_ORIENTATION_SF);
-
- int position = 0;
- byte[] fnoData = new byte[26];
-
- List<CharacterSetOrientation> orientations = new ArrayList<CharacterSetOrientation>();
-
- // Read data, ignoring bytes 0 - 2
- for (int index = 3; index < data.length; index++) {
- // Build the font orientation record
- fnoData[position] = data[index];
- position++;
-
- if (position == 26) {
- position = 0;
-
- int orientation = determineOrientation(fnoData[2]);
- int spaceIncrement = getUBIN(fnoData, 8);
- int emIncrement = getUBIN(fnoData, 14);
- int nominalCharacterIncrement = getUBIN(fnoData, 20);
-
- orientations.add(new CharacterSetOrientation(orientation, spaceIncrement,
- emIncrement, nominalCharacterIncrement));
- }
- }
- return orientations.toArray(EMPTY_CSO_ARRAY);
- }
-
- /**
- * Populate the CharacterSetOrientation object in the suplied array with the
- * font position details using the supplied structured field reader.
- *
- * @param structuredFieldReader
- * the structured field reader
- * @param characterSetOrientations
- * the array of CharacterSetOrientation objects
- * @param metricNormalizationFactor factor to apply to the metrics to get normalized
- * font metric values
- * @throws IOException if an I/O exception of some sort has occurred.
- */
- private void processFontPosition(StructuredFieldReader structuredFieldReader,
- CharacterSetOrientation[] characterSetOrientations, ValueNormalizer normalizer)
- throws IOException {
-
- byte[] data = structuredFieldReader.getNext(FONT_POSITION_SF);
-
- int position = 0;
- byte[] fpData = new byte[26];
-
- int characterSetOrientationIndex = 0;
-
- // Read data, ignoring bytes 0 - 2
- for (int index = 3; index < data.length; index++) {
- if (position < 22) {
- // Build the font orientation record
- fpData[position] = data[index];
- if (position == 9) {
- CharacterSetOrientation characterSetOrientation
- = characterSetOrientations[characterSetOrientationIndex];
- int xHeight = getSBIN(fpData, 2);
- int capHeight = getSBIN(fpData, 4);
- int ascHeight = getSBIN(fpData, 6);
- int dscHeight = getSBIN(fpData, 8);
- dscHeight = dscHeight * -1;
- int underscoreWidth = getUBIN(fpData, 17);
- int underscorePosition = getSBIN(fpData, 20);
- characterSetOrientation.setXHeight(normalizer.normalize(xHeight));
- characterSetOrientation.setCapHeight(normalizer.normalize(capHeight));
- characterSetOrientation.setAscender(normalizer.normalize(ascHeight));
- characterSetOrientation.setDescender(normalizer.normalize(dscHeight));
- characterSetOrientation.setUnderscoreWidth(normalizer.normalize(underscoreWidth));
- characterSetOrientation.setUnderscorePosition(normalizer.normalize(underscorePosition));
- }
- } else if (position == 22) {
- position = 0;
- characterSetOrientationIndex++;
- fpData[position] = data[index];
- }
- position++;
- }
-
- }
-
-
- private void processFontIndex(StructuredFieldReader structuredFieldReader, CharacterSetOrientation cso,
- Map<String, String> codepage, ValueNormalizer normalizer)
- throws IOException {
-
- byte[] data = structuredFieldReader.getNext(FONT_INDEX_SF);
-
- int position = 0;
-
- byte[] gcgid = new byte[8];
- byte[] fiData = new byte[20];
-
- String firstABCMismatch = null;
-
- // Read data, ignoring bytes 0 - 2
- for (int index = 3; index < data.length; index++) {
- if (position < 8) {
- gcgid[position] = data[index];
- position++;
- } else if (position < 27) {
- fiData[position - 8] = data[index];
- position++;
- } else if (position == 27) {
-
- fiData[position - 8] = data[index];
-
- position = 0;
-
- String gcgiString = new String(gcgid, AFPConstants.EBCIDIC_ENCODING);
-
- String idx = codepage.get(gcgiString);
-
- if (idx != null) {
-
- char cidx = idx.charAt(0);
- int width = getUBIN(fiData, 0);
- int ascendHt = getSBIN(fiData, 2);
- int descendDp = getSBIN(fiData, 4);
- int a = getSBIN(fiData, 10);
- int b = getUBIN(fiData, 12);
- int c = getSBIN(fiData, 14);
- int abc = a + b + c;
- int diff = Math.abs(abc - width);
- if (diff != 0 && width != 0) {
- double diffPercent = 100 * diff / (double) width;
- if (diffPercent > 2) {
- if (LOG.isTraceEnabled()) {
- LOG.trace(gcgiString + ": "
- + a + " + " + b + " + " + c + " = " + (a + b + c)
- + " but found: " + width);
- }
- if (firstABCMismatch == null) {
- firstABCMismatch = gcgiString;
- }
- }
- }
- int normalizedWidth = normalizer.normalize(width);
- int x0 = normalizer.normalize(a);
- int y0 = normalizer.normalize(-descendDp);
- int dx = normalizer.normalize(b);
- int dy = normalizer.normalize(ascendHt + descendDp);
- cso.setCharacterMetrics(cidx, normalizedWidth, new Rectangle(x0, y0, dx, dy));
- }
- }
- }
-
- if (LOG.isDebugEnabled() && firstABCMismatch != null) {
- //Debug level because it usually is no problem.
- LOG.debug("Font has metrics inconsitencies where A+B+C doesn't equal the"
- + " character increment. The first such character found: "
- + firstABCMismatch);
- }
- }
-
- private static int getUBIN(byte[] data, int start) {
- return ((data[start] & 0xFF) << 8) + (data[start + 1] & 0xFF);
- }
-
- private static int getSBIN(byte[] data, int start) {
- int ubin = ((data[start] & 0xFF) << 8) + (data[start + 1] & 0xFF);
- if ((ubin & 0x8000) != 0) {
- //extend sign
- return ubin | 0xFFFF0000;
- } else {
- return ubin;
- }
- }
-
- private class FontControl {
-
- private int dpi;
- private int unitsPerEm;
-
- private boolean isRelative;
-
- public int getDpi() {
- return dpi;
- }
-
- public void setDpi(int i) {
- dpi = i;
- }
-
- public int getUnitsPerEm() {
- return this.unitsPerEm;
- }
-
- public void setUnitsPerEm(int value) {
- this.unitsPerEm = value;
- }
-
- public boolean isRelative() {
- return isRelative;
- }
-
- public void setRelative(boolean b) {
- isRelative = b;
- }
- }
-
- private static class FontDescriptor {
-
- private byte[] data;
-
- public FontDescriptor(byte[] data) {
- this.data = data;
- }
-
- public int getNominalFontSizeInMillipoints() {
- int nominalFontSize = 100 * getUBIN(data, 39);
- return nominalFontSize;
- }
- }
-
- private static final class SingleByteLoader extends CharacterSetBuilder {
-
- private static final SingleByteLoader INSTANCE = new SingleByteLoader();
-
- private SingleByteLoader() {
- super();
- }
-
- private static SingleByteLoader getInstance() {
- return INSTANCE;
- }
- }
-
- /**
- * Double-byte (CID Keyed font (Type 0)) implementation of AFPFontReader.
- */
- private static final class DoubleByteLoader extends CharacterSetBuilder {
-
- private static final DoubleByteLoader INSTANCE = new DoubleByteLoader();
-
- private DoubleByteLoader() {
- }
-
- static DoubleByteLoader getInstance() {
- return INSTANCE;
- }
-
- @Override
- protected Map<String, String> loadCodePage(String codePage, String encoding,
- AFPResourceAccessor accessor, AFPEventProducer eventProducer) throws IOException {
- // Create the HashMap to store code page information
- Map<String, String> codePages = new HashMap<String, String>();
- InputStream inputStream = null;
- try {
- inputStream = super.openInputStream(accessor, codePage.trim(), eventProducer);
- } catch (IOException e) {
- eventProducer.codePageNotFound(this, e);
- throw e;
- }
- try {
- StructuredFieldReader structuredFieldReader = new StructuredFieldReader(inputStream);
- byte[] data;
- while ((data = structuredFieldReader.getNext(CHARACTER_TABLE_SF)) != null) {
- int position = 0;
- byte[] gcgiBytes = new byte[8];
- byte[] charBytes = new byte[2];
- // Read data, ignoring bytes 0 - 2
- for (int index = 3; index < data.length; index++) {
-
- if (position < 8) {
- // Build the graphic character global identifier key
- gcgiBytes[position] = data[index];
- position++;
- } else if (position == 9) {
- // Set the character
- charBytes[0] = data[index];
- position++;
- } else if (position == 10) {
- position = 0;
- // Set the character
- charBytes[1] = data[index];
-
- String gcgiString = new String(gcgiBytes,
- AFPConstants.EBCIDIC_ENCODING);
- String charString = new String(charBytes, encoding);
- codePages.put(gcgiString, charString);
- } else {
- position++;
- }
- }
- }
- } finally {
- super.closeInputStream(inputStream);
- }
- return codePages;
- }
-
- }
-
- private static int determineOrientation(byte orientation) {
- int degrees = 0;
-
- switch (orientation) {
- case 0x00:
- degrees = 0;
- break;
- case 0x2D:
- degrees = 90;
- break;
- case 0x5A:
- degrees = 180;
- break;
- case (byte) 0x87:
- degrees = 270;
- break;
- default:
- throw new IllegalStateException("Invalid orientation: " + orientation);
- }
- return degrees;
- }
- }
|