123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373 |
- /*
- * 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.render.ps;
-
- import java.io.FileNotFoundException;
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.MalformedURLException;
- import java.util.Iterator;
- import java.util.Map;
-
- import javax.xml.transform.Source;
- import javax.xml.transform.stream.StreamSource;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.fonts.Glyphs;
- import org.apache.xmlgraphics.ps.DSCConstants;
- import org.apache.xmlgraphics.ps.PSGenerator;
- import org.apache.xmlgraphics.ps.PSResource;
- import org.apache.xmlgraphics.ps.dsc.ResourceTracker;
-
- import org.apache.fop.fonts.Base14Font;
- import org.apache.fop.fonts.CustomFont;
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontInfo;
- import org.apache.fop.fonts.FontType;
- import org.apache.fop.fonts.LazyFont;
- import org.apache.fop.fonts.SingleByteEncoding;
- import org.apache.fop.fonts.SingleByteFont;
- import org.apache.fop.fonts.Typeface;
-
- /**
- * Utility code for font handling in PostScript.
- */
- public class PSFontUtils extends org.apache.xmlgraphics.ps.PSFontUtils {
-
- /** logging instance */
- protected static final Log log = LogFactory.getLog(PSFontUtils.class);
-
- /**
- * Generates the PostScript code for the font dictionary. This method should only be
- * used if no "resource optimization" is performed, i.e. when the fonts are not embedded
- * in a second pass.
- * @param gen PostScript generator to use for output
- * @param fontInfo available fonts
- * @return a Map of PSResource instances representing all defined fonts (key: font key)
- * @throws IOException in case of an I/O problem
- */
- public static Map writeFontDict(PSGenerator gen, FontInfo fontInfo)
- throws IOException {
- return writeFontDict(gen, fontInfo, fontInfo.getFonts(), true);
- }
-
- /**
- * Generates the PostScript code for the font dictionary. This method assumes all used
- * fonts and characters are known, i.e. when PostScript is generated with resource
- * optimization turned on.
- * @param gen PostScript generator to use for output
- * @param fontInfo available fonts
- * @param fonts the set of fonts to work with
- * @return a Map of PSResource instances representing all defined fonts (key: font key)
- * @throws IOException in case of an I/O problem
- */
- public static Map writeFontDict(PSGenerator gen, FontInfo fontInfo, Map fonts)
- throws IOException {
- return writeFontDict(gen, fontInfo, fonts, false);
- }
-
- /**
- * Generates the PostScript code for the font dictionary.
- * @param gen PostScript generator to use for output
- * @param fontInfo available fonts
- * @param fonts the set of fonts to work with
- * @param encodeAllCharacters true if all characters shall be encoded using additional,
- * generated encodings.
- * @return a Map of PSResource instances representing all defined fonts (key: font key)
- * @throws IOException in case of an I/O problem
- */
- private static Map writeFontDict(PSGenerator gen, FontInfo fontInfo, Map fonts,
- boolean encodeAllCharacters) throws IOException {
- gen.commentln("%FOPBeginFontDict");
-
- Map fontResources = new java.util.HashMap();
- Iterator iter = fonts.keySet().iterator();
- while (iter.hasNext()) {
- String key = (String)iter.next();
- Typeface tf = getTypeFace(fontInfo, fonts, key);
- PSResource fontRes = new PSResource(PSResource.TYPE_FONT, tf.getFontName());
- fontResources.put(key, fontRes);
- embedFont(gen, tf, fontRes);
-
- if (tf instanceof SingleByteFont) {
- SingleByteFont sbf = (SingleByteFont)tf;
-
- if (encodeAllCharacters) {
- sbf.encodeAllUnencodedCharacters();
- }
-
- for (int i = 0, c = sbf.getAdditionalEncodingCount(); i < c; i++) {
- SingleByteEncoding encoding = sbf.getAdditionalEncoding(i);
- defineEncoding(gen, encoding);
- String postFix = "_" + (i + 1);
- PSResource derivedFontRes = defineDerivedFont(gen, tf.getFontName(),
- tf.getFontName() + postFix, encoding.getName());
- fontResources.put(key + postFix, derivedFontRes);
- }
- }
- }
- gen.commentln("%FOPEndFontDict");
- reencodeFonts(gen, fonts);
- return fontResources;
- }
-
- private static void reencodeFonts(PSGenerator gen, Map fonts) throws IOException {
- ResourceTracker tracker = gen.getResourceTracker();
-
- if (!tracker.isResourceSupplied(WINANSI_ENCODING_RESOURCE)) {
- //Only out Base 14 fonts still use that
- defineWinAnsiEncoding(gen);
- }
- gen.commentln("%FOPBeginFontReencode");
-
- //Rewrite font encodings
- Iterator iter = fonts.keySet().iterator();
- while (iter.hasNext()) {
- String key = (String)iter.next();
- Typeface tf = (Typeface)fonts.get(key);
- if (tf instanceof LazyFont) {
- tf = ((LazyFont)tf).getRealFont();
- if (tf == null) {
- continue;
- }
- }
- if (null == tf.getEncodingName()) {
- //ignore (ZapfDingbats and Symbol used to run through here, kept for safety reasons)
- } else if ("SymbolEncoding".equals(tf.getEncodingName())) {
- //ignore (no encoding redefinition)
- } else if ("ZapfDingbatsEncoding".equals(tf.getEncodingName())) {
- //ignore (no encoding redefinition)
- } else {
- if (tf instanceof Base14Font) {
- //Our Base 14 fonts don't use the default encoding
- redefineFontEncoding(gen, tf.getFontName(), tf.getEncodingName());
- } else if (tf instanceof SingleByteFont) {
- SingleByteFont sbf = (SingleByteFont)tf;
- if (!sbf.isUsingNativeEncoding()) {
- //Font has been configured to use an encoding other than the default one
- redefineFontEncoding(gen, tf.getFontName(), tf.getEncodingName());
- }
- }
- }
- }
- gen.commentln("%FOPEndFontReencode");
- }
-
- private static Typeface getTypeFace(FontInfo fontInfo, Map fonts, String key) {
- Typeface tf = (Typeface)fonts.get(key);
- if (tf instanceof LazyFont) {
- tf = ((LazyFont)tf).getRealFont();
- }
- if (tf == null) {
- //This is to avoid an NPE if a malconfigured font is in the configuration but not
- //used in the document. If it were used, we wouldn't get this far.
- String fallbackKey = fontInfo.getInternalFontKey(Font.DEFAULT_FONT);
- tf = (Typeface)fonts.get(fallbackKey);
- }
- return tf;
- }
-
- /**
- * Embeds a font in the PostScript file.
- * @param gen the PostScript generator
- * @param tf the font
- * @param fontRes the PSResource associated with the font
- * @throws IOException In case of an I/O error
- */
- public static void embedFont(PSGenerator gen, Typeface tf, PSResource fontRes)
- throws IOException {
- boolean embeddedFont = false;
- if (FontType.TYPE1 == tf.getFontType()) {
- if (tf instanceof CustomFont) {
- CustomFont cf = (CustomFont)tf;
- if (isEmbeddable(cf)) {
- InputStream in = getInputStreamOnFont(gen, cf);
- if (in != null) {
- gen.writeDSCComment(DSCConstants.BEGIN_RESOURCE,
- fontRes);
- embedType1Font(gen, in);
- gen.writeDSCComment(DSCConstants.END_RESOURCE);
- gen.getResourceTracker().registerSuppliedResource(fontRes);
- embeddedFont = true;
- } else {
- gen.commentln("%WARNING: Could not embed font: " + cf.getFontName());
- log.warn("Font " + cf.getFontName() + " is marked as supplied in the"
- + " PostScript file but could not be embedded!");
- }
- }
- }
- }
- if (!embeddedFont) {
- gen.writeDSCComment(DSCConstants.INCLUDE_RESOURCE, fontRes);
- }
- }
-
- private static boolean isEmbeddable(CustomFont font) {
- return font.isEmbeddable();
- }
-
- private static InputStream getInputStreamOnFont(PSGenerator gen, CustomFont font)
- throws IOException {
- if (isEmbeddable(font)) {
- Source source = font.getEmbedFileSource();
- if (source == null && font.getEmbedResourceName() != null) {
- source = new StreamSource(PSFontUtils.class
- .getResourceAsStream(font.getEmbedResourceName()));
- }
- if (source == null) {
- return null;
- }
- InputStream in = null;
- if (source instanceof StreamSource) {
- in = ((StreamSource) source).getInputStream();
- }
- if (in == null && source.getSystemId() != null) {
- try {
- in = new java.net.URL(source.getSystemId()).openStream();
- } catch (MalformedURLException e) {
- new FileNotFoundException(
- "File not found. URL could not be resolved: "
- + e.getMessage());
- }
- }
- if (in == null) {
- return null;
- }
- //Make sure the InputStream is decorated with a BufferedInputStream
- if (!(in instanceof java.io.BufferedInputStream)) {
- in = new java.io.BufferedInputStream(in);
- }
- return in;
- } else {
- return null;
- }
- }
-
- /**
- * Determines the set of fonts that will be supplied with the PS file and registers them
- * with the resource tracker. All the fonts that are being processed are returned as a Map.
- * @param resTracker the resource tracker
- * @param fontInfo available fonts
- * @param fonts the set of fonts to work with
- * @return a Map of PSResource instances representing all defined fonts (key: font key)
- */
- public static Map determineSuppliedFonts(ResourceTracker resTracker,
- FontInfo fontInfo, Map fonts) {
- Map fontResources = new java.util.HashMap();
- Iterator iter = fonts.keySet().iterator();
- while (iter.hasNext()) {
- String key = (String)iter.next();
- Typeface tf = getTypeFace(fontInfo, fonts, key);
- PSResource fontRes = new PSResource("font", tf.getFontName());
- fontResources.put(key, fontRes);
- if (FontType.TYPE1 == tf.getFontType()) {
- if (tf instanceof CustomFont) {
- CustomFont cf = (CustomFont)tf;
- if (isEmbeddable(cf)) {
- resTracker.registerSuppliedResource(fontRes);
- }
- if (tf instanceof SingleByteFont) {
- SingleByteFont sbf = (SingleByteFont)tf;
- for (int i = 0, c = sbf.getAdditionalEncodingCount(); i < c; i++) {
- SingleByteEncoding encoding = sbf.getAdditionalEncoding(i);
- PSResource encodingRes = new PSResource(
- PSResource.TYPE_ENCODING, encoding.getName());
- resTracker.registerSuppliedResource(encodingRes);
- PSResource derivedFontRes = new PSResource(
- PSResource.TYPE_FONT, tf.getFontName() + "_" + (i + 1));
- resTracker.registerSuppliedResource(derivedFontRes);
- }
- }
- }
- }
- }
- return fontResources;
- }
-
- /**
- * Defines the single-byte encoding for use in PostScript files.
- * @param gen the PostScript generator
- * @param encoding the single-byte encoding
- * @return the PSResource instance that represents the encoding
- * @throws IOException In case of an I/O problem
- */
- public static PSResource defineEncoding(PSGenerator gen, SingleByteEncoding encoding)
- throws IOException {
- PSResource res = new PSResource(PSResource.TYPE_ENCODING, encoding.getName());
- gen.writeDSCComment(DSCConstants.BEGIN_RESOURCE, res);
- gen.writeln("/" + encoding.getName() + " [");
- String[] charNames = encoding.getCharNameMap();
- for (int i = 0; i < 256; i++) {
- if (i > 0) {
- if ((i % 5) == 0) {
- gen.newLine();
- } else {
- gen.write(" ");
- }
- }
- String glyphname = null;
- if (i < charNames.length) {
- glyphname = charNames[i];
- }
- if (glyphname == null || "".equals(glyphname)) {
- glyphname = Glyphs.NOTDEF;
- }
- gen.write("/");
- gen.write(glyphname);
- }
- gen.newLine();
- gen.writeln("] def");
- gen.writeDSCComment(DSCConstants.END_RESOURCE);
- gen.getResourceTracker().registerSuppliedResource(res);
- return res;
- }
-
- /**
- * Derives a new font based on an existing font with a given encoding. The encoding must
- * have been registered before.
- * @param gen the PostScript generator
- * @param baseFontName the font name of the font to derive from
- * @param fontName the font name of the new font to be define
- * @param encoding the new encoding (must be predefined in the PS file)
- * @return the PSResource representing the derived font
- * @throws IOException In case of an I/O problem
- */
- public static PSResource defineDerivedFont
- (PSGenerator gen, String baseFontName, String fontName, String encoding)
- throws IOException {
- PSResource res = new PSResource(PSResource.TYPE_FONT, fontName);
- gen.writeDSCComment(DSCConstants.BEGIN_RESOURCE, res);
- gen.commentln("%XGCDependencies: font " + baseFontName);
- gen.commentln("%XGC+ encoding " + encoding);
- gen.writeln("/" + baseFontName + " findfont");
- gen.writeln("dup length dict begin");
- gen.writeln(" {1 index /FID ne {def} {pop pop} ifelse} forall");
- gen.writeln(" /Encoding " + encoding + " def");
- gen.writeln(" currentdict");
- gen.writeln("end");
- gen.writeln("/" + fontName + " exch definefont pop");
- gen.writeDSCComment(DSCConstants.END_RESOURCE);
- gen.getResourceTracker().registerSuppliedResource(res);
- return res;
- }
-
- }
|