| /* |
| * 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.net.URI; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.commons.io.IOUtils; |
| |
| import org.apache.fop.apps.io.InternalResourceResolver; |
| 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.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 resourceResolver the resource resolver for font URI resolution |
| */ |
| public TTFFontLoader(URI fontFileURI, InternalResourceResolver resourceResolver) { |
| this(fontFileURI, null, true, EmbeddingMode.AUTO, EncodingMode.AUTO, true, true, resourceResolver); |
| } |
| |
| /** |
| * 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(URI fontFileURI, String subFontName, boolean embedded, |
| EmbeddingMode embeddingMode, EncodingMode encodingMode, boolean useKerning, |
| boolean useAdvanced, InternalResourceResolver 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 = resourceResolver.getResource(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(resourceResolver, embeddingMode); |
| returnFont = multiFont; |
| multiFont.setTTCName(ttcFontName); |
| } else { |
| singleFont = new SingleByteFont(resourceResolver); |
| returnFont = singleFont; |
| } |
| |
| 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.setEmbedURI(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() ); |
| } |
| } |
| |
| } |
