| /* |
| * 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.awt.Rectangle; |
| 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.CFFToType1Font; |
| import org.apache.fop.fonts.CIDFontType; |
| import org.apache.fop.fonts.CMapSegment; |
| import org.apache.fop.fonts.CustomFont; |
| 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.OpenFont.PostScriptVersion; |
| import org.apache.fop.util.HexEncoder; |
| |
| /** |
| * Loads a TrueType font into memory directly from the original font file. |
| */ |
| public class OFFontLoader extends FontLoader { |
| |
| private MultiByteFont multiFont; |
| private SingleByteFont singleFont; |
| private final String subFontName; |
| private EncodingMode encodingMode; |
| private EmbeddingMode embeddingMode; |
| private boolean simulateStyle; |
| private boolean embedAsType1; |
| |
| /** |
| * Default constructor |
| * @param fontFileURI the URI representing the font file |
| * @param resourceResolver the resource resolver for font URI resolution |
| */ |
| public OFFontLoader(URI fontFileURI, InternalResourceResolver resourceResolver) { |
| this(fontFileURI, null, true, EmbeddingMode.AUTO, EncodingMode.AUTO, true, true, resourceResolver, false, |
| false); |
| } |
| |
| /** |
| * 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 |
| * @param simulateStyle Determines whether to simulate font styles if a font does not support those by default. |
| */ |
| public OFFontLoader(URI fontFileURI, String subFontName, boolean embedded, |
| EmbeddingMode embeddingMode, EncodingMode encodingMode, boolean useKerning, |
| boolean useAdvanced, InternalResourceResolver resolver, boolean simulateStyle, boolean embedAsType1) { |
| super(fontFileURI, embedded, useKerning, useAdvanced, resolver); |
| this.subFontName = subFontName; |
| this.encodingMode = encodingMode; |
| this.embeddingMode = embeddingMode; |
| this.simulateStyle = simulateStyle; |
| this.embedAsType1 = embedAsType1; |
| 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 { |
| FontFileReader reader = new FontFileReader(in); |
| String header = readHeader(reader); |
| boolean isCFF = header.equals("OTTO"); |
| OpenFont otf = (isCFF) ? new OTFFile(useKerning, useAdvanced) : new TTFFile(useKerning, useAdvanced); |
| boolean supported = otf.readFont(reader, header, ttcFontName); |
| if (!supported) { |
| throw new IOException("The font does not have a Unicode cmap table: " + fontFileURI); |
| } |
| buildFont(otf, ttcFontName, embedAsType1); |
| loaded = true; |
| } finally { |
| IOUtils.closeQuietly(in); |
| } |
| } |
| |
| public static String readHeader(FontFileReader fontFile) throws IOException { |
| if (fontFile != null) { |
| fontFile.seekSet(0); |
| return fontFile.readTTFString(4); // TTF_FIXED_SIZE (4 bytes) |
| } |
| return null; |
| } |
| |
| private void buildFont(OpenFont otf, String ttcFontName, boolean embedAsType1) { |
| boolean isCid = this.embedded; |
| if (this.encodingMode == EncodingMode.SINGLE_BYTE) { |
| isCid = false; |
| } |
| |
| CustomFont font; |
| if (isCid) { |
| if (otf instanceof OTFFile && embedAsType1) { |
| multiFont = new CFFToType1Font(resourceResolver, embeddingMode); |
| } else { |
| multiFont = new MultiByteFont(resourceResolver, embeddingMode); |
| } |
| multiFont.setIsOTFFile(otf instanceof OTFFile); |
| returnFont = multiFont; |
| multiFont.setTTCName(ttcFontName); |
| font = multiFont; |
| } else { |
| singleFont = new SingleByteFont(resourceResolver, embeddingMode); |
| returnFont = singleFont; |
| font = singleFont; |
| } |
| font.setSimulateStyle(simulateStyle); |
| |
| returnFont.setFontURI(fontFileURI); |
| if (!otf.getEmbedFontName().equals("")) { |
| returnFont.setFontName(otf.getEmbedFontName()); |
| } else { |
| returnFont.setFontName(otf.getPostScriptName()); |
| } |
| returnFont.setFullName(otf.getFullName()); |
| returnFont.setFamilyNames(otf.getFamilyNames()); |
| returnFont.setFontSubFamilyName(otf.getSubFamilyName()); |
| returnFont.setCapHeight(otf.getCapHeight()); |
| returnFont.setXHeight(otf.getXHeight()); |
| returnFont.setAscender(otf.getLowerCaseAscent()); |
| returnFont.setDescender(otf.getLowerCaseDescent()); |
| returnFont.setFontBBox(otf.getFontBBox()); |
| returnFont.setUnderlinePosition(otf.getUnderlinePosition() - otf.getUnderlineThickness() / 2); |
| returnFont.setUnderlineThickness(otf.getUnderlineThickness()); |
| returnFont.setStrikeoutPosition(otf.getStrikeoutPosition() - otf.getStrikeoutThickness() / 2); |
| returnFont.setStrikeoutThickness(otf.getStrikeoutThickness()); |
| returnFont.setFlags(otf.getFlags()); |
| returnFont.setStemV(Integer.parseInt(otf.getStemV())); //not used for TTF |
| returnFont.setItalicAngle(Integer.parseInt(otf.getItalicAngle())); |
| returnFont.setMissingWidth(0); |
| returnFont.setWeight(otf.getWeightClass()); |
| if (isCid) { |
| if (otf instanceof OTFFile) { |
| if (((OTFFile) otf).isType1() && embeddingMode == EmbeddingMode.SUBSET && !embedAsType1) { |
| multiFont.setFontType(FontType.TYPE1C); |
| copyGlyphMetricsSingleByte(otf); |
| } |
| multiFont.setCIDType(CIDFontType.CIDTYPE0); |
| } else { |
| multiFont.setCIDType(CIDFontType.CIDTYPE2); |
| } |
| multiFont.setWidthArray(otf.getWidths()); |
| multiFont.setBBoxArray(otf.getBoundingBoxes()); |
| } else { |
| singleFont.setFontType(FontType.TRUETYPE); |
| singleFont.setEncoding(otf.getCharSetName()); |
| returnFont.setFirstChar(otf.getFirstChar()); |
| returnFont.setLastChar(otf.getLastChar()); |
| singleFont.setTrueTypePostScriptVersion(otf.getPostScriptVersion()); |
| copyGlyphMetricsSingleByte(otf); |
| } |
| returnFont.setCMap(getCMap(otf)); |
| |
| if (otf.getKerning() != null && useKerning) { |
| copyKerning(otf, isCid); |
| } |
| if (useAdvanced) { |
| copyAdvanced(otf); |
| } |
| if (this.embedded) { |
| if (otf.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(OpenFont otf) { |
| CMapSegment[] array = new CMapSegment[otf.getCMaps().size()]; |
| return otf.getCMaps().toArray(array); |
| } |
| |
| private void copyGlyphMetricsSingleByte(OpenFont otf) { |
| int[] wx = otf.getWidths(); |
| Rectangle[] bboxes = otf.getBoundingBoxes(); |
| if (singleFont != null) { |
| for (int i = singleFont.getFirstChar(); i <= singleFont.getLastChar(); i++) { |
| singleFont.setWidth(i, otf.getCharWidth(i)); |
| int[] bbox = otf.getBBox(i); |
| singleFont.setBoundingBox(i, |
| new Rectangle(bbox[0], bbox[1], bbox[2] - bbox[0], bbox[3] - bbox[1])); |
| } |
| } |
| for (CMapSegment segment : otf.getCMaps()) { |
| if (segment.getUnicodeStart() < 0xFFFE) { |
| for (char u = (char)segment.getUnicodeStart(); u <= segment.getUnicodeEnd(); u++) { |
| int codePoint = 0; |
| if (singleFont != null) { |
| codePoint = singleFont.getEncoding().mapChar(u); |
| } |
| if (codePoint <= 0) { |
| int glyphIndex = segment.getGlyphStartIndex() + u - segment.getUnicodeStart(); |
| String glyphName = otf.getGlyphName(glyphIndex); |
| if (glyphName.length() == 0 && otf.getPostScriptVersion() != PostScriptVersion.V2) { |
| glyphName = "u" + HexEncoder.encode(u); |
| } |
| if (glyphName.length() > 0) { |
| String unicode = Character.toString(u); |
| NamedCharacter nc = new NamedCharacter(glyphName, unicode); |
| returnFont.addUnencodedCharacter(nc, wx[glyphIndex], bboxes[glyphIndex]); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Copy kerning information. |
| */ |
| private void copyKerning(OpenFont otf, boolean isCid) { |
| |
| // Get kerning |
| Set<Integer> kerningSet; |
| if (isCid) { |
| kerningSet = otf.getKerning().keySet(); |
| } else { |
| kerningSet = otf.getAnsiKerning().keySet(); |
| } |
| |
| for (Integer kpx1 : kerningSet) { |
| Map<Integer, Integer> h2; |
| if (isCid) { |
| h2 = otf.getKerning().get(kpx1); |
| } else { |
| h2 = otf.getAnsiKerning().get(kpx1); |
| } |
| returnFont.putKerningEntry(kpx1, h2); |
| } |
| } |
| |
| /** |
| * Copy advanced typographic information. |
| */ |
| private void copyAdvanced(OpenFont otf) { |
| if (returnFont instanceof MultiByteFont) { |
| MultiByteFont mbf = (MultiByteFont) returnFont; |
| mbf.setGDEF(otf.getGDEF()); |
| mbf.setGSUB(otf.getGSUB()); |
| mbf.setGPOS(otf.getGPOS()); |
| } |
| } |
| |
| } |
