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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.io.InputStream;
- import java.util.Map;
- import java.util.Set;
-
- import org.apache.commons.io.IOUtils;
-
- import org.apache.fop.fonts.CIDFontType;
- import org.apache.fop.fonts.CMapSegment;
- import org.apache.fop.fonts.EmbeddingMode;
- import org.apache.fop.fonts.EncodingMode;
- import org.apache.fop.fonts.FontLoader;
- import org.apache.fop.fonts.FontResolver;
- import org.apache.fop.fonts.FontType;
- import org.apache.fop.fonts.MultiByteFont;
- import org.apache.fop.fonts.NamedCharacter;
- import org.apache.fop.fonts.SingleByteFont;
- import org.apache.fop.fonts.truetype.TTFFile.PostScriptVersion;
- import org.apache.fop.util.HexEncoder;
-
- /**
- * Loads a TrueType font into memory directly from the original font file.
- */
- public class TTFFontLoader extends FontLoader {
-
- private MultiByteFont multiFont;
- private SingleByteFont singleFont;
- private final String subFontName;
- private EncodingMode encodingMode;
- private EmbeddingMode embeddingMode;
-
- /**
- * Default constructor
- * @param fontFileURI the URI representing the font file
- * @param resolver the FontResolver for font URI resolution
- */
- public TTFFontLoader(String fontFileURI, FontResolver resolver) {
- this(fontFileURI, null, true, EmbeddingMode.AUTO, EncodingMode.AUTO, true, true, resolver);
- }
-
- /**
- * Additional constructor for TrueType Collections.
- * @param fontFileURI the URI representing the font file
- * @param subFontName the sub-fontname of a font in a TrueType Collection (or null for normal
- * TrueType fonts)
- * @param embedded indicates whether the font is embedded or referenced
- * @param embeddingMode the embedding mode of the font
- * @param encodingMode the requested encoding mode
- * @param useKerning true to enable loading kerning info if available, false to disable
- * @param useAdvanced true to enable loading advanced info if available, false to disable
- * @param resolver the FontResolver for font URI resolution
- */
- public TTFFontLoader(String fontFileURI, String subFontName,
- boolean embedded, EmbeddingMode embeddingMode, EncodingMode encodingMode,
- boolean useKerning, boolean useAdvanced, FontResolver resolver) {
- super(fontFileURI, embedded, useKerning, useAdvanced, resolver);
- this.subFontName = subFontName;
- this.encodingMode = encodingMode;
- this.embeddingMode = embeddingMode;
- if (this.encodingMode == EncodingMode.AUTO) {
- this.encodingMode = EncodingMode.CID; //Default to CID mode for TrueType
- }
- if (this.embeddingMode == EmbeddingMode.AUTO) {
- this.embeddingMode = EmbeddingMode.SUBSET;
- }
- }
-
- /** {@inheritDoc} */
- protected void read() throws IOException {
- read(this.subFontName);
- }
-
- /**
- * Reads a TrueType font.
- * @param ttcFontName the TrueType sub-font name of TrueType Collection (may be null for
- * normal TrueType fonts)
- * @throws IOException if an I/O error occurs
- */
- private void read(String ttcFontName) throws IOException {
- InputStream in = openFontUri(resolver, this.fontFileURI);
- try {
- TTFFile ttf = new TTFFile(useKerning, useAdvanced);
- FontFileReader reader = new FontFileReader(in);
- boolean supported = ttf.readFont(reader, ttcFontName);
- if (!supported) {
- throw new IOException("TrueType font is not supported: " + fontFileURI);
- }
- buildFont(ttf, ttcFontName);
- loaded = true;
- } finally {
- IOUtils.closeQuietly(in);
- }
- }
-
-
- private void buildFont(TTFFile ttf, String ttcFontName) {
- if (ttf.isCFF()) {
- throw new UnsupportedOperationException(
- "OpenType fonts with CFF data are not supported, yet");
- }
-
- boolean isCid = this.embedded;
- if (this.encodingMode == EncodingMode.SINGLE_BYTE) {
- isCid = false;
- }
-
- if (isCid) {
- multiFont = new MultiByteFont();
- returnFont = multiFont;
- multiFont.setTTCName(ttcFontName);
- } else {
- singleFont = new SingleByteFont();
- returnFont = singleFont;
- }
- returnFont.setResolver(resolver);
-
- returnFont.setFontName(ttf.getPostScriptName());
- returnFont.setFullName(ttf.getFullName());
- returnFont.setFamilyNames(ttf.getFamilyNames());
- returnFont.setFontSubFamilyName(ttf.getSubFamilyName());
- returnFont.setCapHeight(ttf.getCapHeight());
- returnFont.setXHeight(ttf.getXHeight());
- returnFont.setAscender(ttf.getLowerCaseAscent());
- returnFont.setDescender(ttf.getLowerCaseDescent());
- returnFont.setFontBBox(ttf.getFontBBox());
- returnFont.setFlags(ttf.getFlags());
- returnFont.setStemV(Integer.parseInt(ttf.getStemV())); //not used for TTF
- returnFont.setItalicAngle(Integer.parseInt(ttf.getItalicAngle()));
- returnFont.setMissingWidth(0);
- returnFont.setWeight(ttf.getWeightClass());
- returnFont.setEmbeddingMode(this.embeddingMode);
- if (isCid) {
- multiFont.setCIDType(CIDFontType.CIDTYPE2);
- int[] wx = ttf.getWidths();
- multiFont.setWidthArray(wx);
- } else {
- singleFont.setFontType(FontType.TRUETYPE);
- singleFont.setEncoding(ttf.getCharSetName());
- returnFont.setFirstChar(ttf.getFirstChar());
- returnFont.setLastChar(ttf.getLastChar());
- singleFont.setTrueTypePostScriptVersion(ttf.getPostScriptVersion());
- copyWidthsSingleByte(ttf);
- }
- returnFont.setCMap(getCMap(ttf));
-
- if (useKerning) {
- copyKerning(ttf, isCid);
- }
- if (useAdvanced) {
- copyAdvanced(ttf);
- }
- if (this.embedded) {
- if (ttf.isEmbeddable()) {
- returnFont.setEmbedFileName(this.fontFileURI);
- } else {
- String msg = "The font " + this.fontFileURI + " is not embeddable due to a"
- + " licensing restriction.";
- throw new RuntimeException(msg);
- }
- }
- }
-
- private CMapSegment[] getCMap(TTFFile ttf) {
- CMapSegment[] array = new CMapSegment[ttf.getCMaps().size()];
- return ttf.getCMaps().toArray(array);
- }
-
- private void copyWidthsSingleByte(TTFFile ttf) {
- int[] wx = ttf.getWidths();
- for (int i = singleFont.getFirstChar(); i <= singleFont.getLastChar(); i++) {
- singleFont.setWidth(i, ttf.getCharWidth(i));
- }
-
- for (CMapSegment segment : ttf.getCMaps()) {
- if (segment.getUnicodeStart() < 0xFFFE) {
- for (char u = (char)segment.getUnicodeStart(); u <= segment.getUnicodeEnd(); u++) {
- int codePoint = singleFont.getEncoding().mapChar(u);
- if (codePoint <= 0) {
- int glyphIndex = segment.getGlyphStartIndex() + u - segment.getUnicodeStart();
- String glyphName = ttf.getGlyphName(glyphIndex);
- if (glyphName.length() == 0 && ttf.getPostScriptVersion() != PostScriptVersion.V2) {
- glyphName = "u" + HexEncoder.encode(u);
- }
- if (glyphName.length() > 0) {
- String unicode = Character.toString(u);
- NamedCharacter nc = new NamedCharacter(glyphName, unicode);
- singleFont.addUnencodedCharacter(nc, wx[glyphIndex]);
- }
- }
- }
- }
- }
- }
-
- /**
- * Copy kerning information.
- */
- private void copyKerning(TTFFile ttf, boolean isCid) {
-
- // Get kerning
- Set<Integer> kerningSet;
- if (isCid) {
- kerningSet = ttf.getKerning().keySet();
- } else {
- kerningSet = ttf.getAnsiKerning().keySet();
- }
-
- for (Integer kpx1 : kerningSet) {
- Map<Integer, Integer> h2;
- if (isCid) {
- h2 = ttf.getKerning().get(kpx1);
- } else {
- h2 = ttf.getAnsiKerning().get(kpx1);
- }
- returnFont.putKerningEntry(kpx1, h2);
- }
- }
-
- /**
- * Copy advanced typographic information.
- */
- private void copyAdvanced ( TTFFile ttf ) {
- if ( returnFont instanceof MultiByteFont ) {
- MultiByteFont mbf = (MultiByteFont) returnFont;
- mbf.setGDEF ( ttf.getGDEF() );
- mbf.setGSUB ( ttf.getGSUB() );
- mbf.setGPOS ( ttf.getGPOS() );
- }
- }
-
- }
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