diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/TrueTypeFontSubSet.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/TrueTypeFontSubSet.java | 428 |
1 files changed, 0 insertions, 428 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/TrueTypeFontSubSet.java b/src/main/java/com/lowagie/text/pdf/TrueTypeFontSubSet.java deleted file mode 100644 index 5107b75..0000000 --- a/src/main/java/com/lowagie/text/pdf/TrueTypeFontSubSet.java +++ /dev/null @@ -1,428 +0,0 @@ -/*
- * $Id: TrueTypeFontSubSet.java,v 1.48 2006/02/23 16:45:49 psoares33 Exp $
- * $Name: $
- *
- * Copyright 2001, 2002 Paulo Soares
- *
- * The contents of this file are subject to the Mozilla Public License Version 1.1
- * (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.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the License.
- *
- * The Original Code is 'iText, a free JAVA-PDF library'.
- *
- * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
- * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
- * All Rights Reserved.
- * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
- * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
- *
- * Contributor(s): all the names of the contributors are added in the source code
- * where applicable.
- *
- * Alternatively, the contents of this file may be used under the terms of the
- * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
- * provisions of LGPL are applicable instead of those above. If you wish to
- * allow use of your version of this file only under the terms of the LGPL
- * License and not to allow others to use your version of this file under
- * the MPL, indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by the LGPL.
- * If you do not delete the provisions above, a recipient may use your version
- * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the MPL as stated above or under the terms of the GNU
- * Library General Public License as published by the Free Software Foundation;
- * either version 2 of the License, or any later version.
- *
- * This library is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
- * details.
- *
- * If you didn't download this code from the following link, you should check if
- * you aren't using an obsolete version:
- * http://www.lowagie.com/iText/
- */
-
-package com.lowagie.text.pdf;
-
-import java.io.*;
-import java.util.HashMap;
-import java.util.ArrayList;
-import java.util.Arrays;
-import com.lowagie.text.DocumentException;
-import com.lowagie.text.ExceptionConverter;
-
-/** Subsets a True Type font by removing the unneeded glyphs from
- * the font.
- *
- * @author Paulo Soares (psoares@consiste.pt)
- */
-class TrueTypeFontSubSet {
- static final String tableNamesSimple[] = {"cvt ", "fpgm", "glyf", "head",
- "hhea", "hmtx", "loca", "maxp", "prep"};
- static final String tableNamesCmap[] = {"cmap", "cvt ", "fpgm", "glyf", "head",
- "hhea", "hmtx", "loca", "maxp", "prep"};
- static final String tableNamesExtra[] = {"OS/2", "cmap", "cvt ", "fpgm", "glyf", "head",
- "hhea", "hmtx", "loca", "maxp", "name, prep"};
- static final int entrySelectors[] = {0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4};
- static final int TABLE_CHECKSUM = 0;
- static final int TABLE_OFFSET = 1;
- static final int TABLE_LENGTH = 2;
- static final int HEAD_LOCA_FORMAT_OFFSET = 51;
-
- static final int ARG_1_AND_2_ARE_WORDS = 1;
- static final int WE_HAVE_A_SCALE = 8;
- static final int MORE_COMPONENTS = 32;
- static final int WE_HAVE_AN_X_AND_Y_SCALE = 64;
- static final int WE_HAVE_A_TWO_BY_TWO = 128;
-
-
- /** Contains the location of the several tables. The key is the name of
- * the table and the value is an <CODE>int[3]</CODE> where position 0
- * is the checksum, position 1 is the offset from the start of the file
- * and position 2 is the length of the table.
- */
- protected HashMap tableDirectory;
- /** The file in use.
- */
- protected RandomAccessFileOrArray rf;
- /** The file name.
- */
- protected String fileName;
- protected boolean includeCmap;
- protected boolean includeExtras;
- protected boolean locaShortTable;
- protected int locaTable[];
- protected HashMap glyphsUsed;
- protected ArrayList glyphsInList;
- protected int tableGlyphOffset;
- protected int newLocaTable[];
- protected byte newLocaTableOut[];
- protected byte newGlyfTable[];
- protected int glyfTableRealSize;
- protected int locaTableRealSize;
- protected byte outFont[];
- protected int fontPtr;
- protected int directoryOffset;
-
- /** Creates a new TrueTypeFontSubSet
- * @param directoryOffset The offset from the start of the file to the table directory
- * @param fileName the file name of the font
- * @param glyphsUsed the glyphs used
- * @param includeCmap <CODE>true</CODE> if the table cmap is to be included in the generated font
- */
- TrueTypeFontSubSet(String fileName, RandomAccessFileOrArray rf, HashMap glyphsUsed, int directoryOffset, boolean includeCmap, boolean includeExtras) {
- this.fileName = fileName;
- this.rf = rf;
- this.glyphsUsed = glyphsUsed;
- this.includeCmap = includeCmap;
- this.includeExtras = includeExtras;
- this.directoryOffset = directoryOffset;
- glyphsInList = new ArrayList(glyphsUsed.keySet());
- }
-
- /** Does the actual work of subsetting the font.
- * @throws IOException on error
- * @throws DocumentException on error
- * @return the subset font
- */
- byte[] process() throws IOException, DocumentException {
- try {
- rf.reOpen();
- createTableDirectory();
- readLoca();
- flatGlyphs();
- createNewGlyphTables();
- locaTobytes();
- assembleFont();
- return outFont;
- }
- finally {
- try {
- rf.close();
- }
- catch (Exception e) {
- // empty on purpose
- }
- }
- }
-
- protected void assembleFont() throws IOException, DocumentException {
- int tableLocation[];
- int fullFontSize = 0;
- String tableNames[];
- if (includeExtras)
- tableNames = tableNamesExtra;
- else {
- if (includeCmap)
- tableNames = tableNamesCmap;
- else
- tableNames = tableNamesSimple;
- }
- int tablesUsed = 2;
- int len = 0;
- for (int k = 0; k < tableNames.length; ++k) {
- String name = tableNames[k];
- if (name.equals("glyf") || name.equals("loca"))
- continue;
- tableLocation = (int[])tableDirectory.get(name);
- if (tableLocation == null)
- continue;
- ++tablesUsed;
- fullFontSize += (tableLocation[TABLE_LENGTH] + 3) & (~3);
- }
- fullFontSize += newLocaTableOut.length;
- fullFontSize += newGlyfTable.length;
- int ref = 16 * tablesUsed + 12;
- fullFontSize += ref;
- outFont = new byte[fullFontSize];
- fontPtr = 0;
- writeFontInt(0x00010000);
- writeFontShort(tablesUsed);
- int selector = entrySelectors[tablesUsed];
- writeFontShort((1 << selector) * 16);
- writeFontShort(selector);
- writeFontShort((tablesUsed - (1 << selector)) * 16);
- for (int k = 0; k < tableNames.length; ++k) {
- String name = tableNames[k];
- tableLocation = (int[])tableDirectory.get(name);
- if (tableLocation == null)
- continue;
- writeFontString(name);
- if (name.equals("glyf")) {
- writeFontInt(calculateChecksum(newGlyfTable));
- len = glyfTableRealSize;
- }
- else if (name.equals("loca")) {
- writeFontInt(calculateChecksum(newLocaTableOut));
- len = locaTableRealSize;
- }
- else {
- writeFontInt(tableLocation[TABLE_CHECKSUM]);
- len = tableLocation[TABLE_LENGTH];
- }
- writeFontInt(ref);
- writeFontInt(len);
- ref += (len + 3) & (~3);
- }
- for (int k = 0; k < tableNames.length; ++k) {
- String name = tableNames[k];
- tableLocation = (int[])tableDirectory.get(name);
- if (tableLocation == null)
- continue;
- if (name.equals("glyf")) {
- System.arraycopy(newGlyfTable, 0, outFont, fontPtr, newGlyfTable.length);
- fontPtr += newGlyfTable.length;
- newGlyfTable = null;
- }
- else if (name.equals("loca")) {
- System.arraycopy(newLocaTableOut, 0, outFont, fontPtr, newLocaTableOut.length);
- fontPtr += newLocaTableOut.length;
- newLocaTableOut = null;
- }
- else {
- rf.seek(tableLocation[TABLE_OFFSET]);
- rf.readFully(outFont, fontPtr, tableLocation[TABLE_LENGTH]);
- fontPtr += (tableLocation[TABLE_LENGTH] + 3) & (~3);
- }
- }
- }
-
- protected void createTableDirectory() throws IOException, DocumentException {
- tableDirectory = new HashMap();
- rf.seek(directoryOffset);
- int id = rf.readInt();
- if (id != 0x00010000)
- throw new DocumentException(fileName + " is not a true type file.");
- int num_tables = rf.readUnsignedShort();
- rf.skipBytes(6);
- for (int k = 0; k < num_tables; ++k) {
- String tag = readStandardString(4);
- int tableLocation[] = new int[3];
- tableLocation[TABLE_CHECKSUM] = rf.readInt();
- tableLocation[TABLE_OFFSET] = rf.readInt();
- tableLocation[TABLE_LENGTH] = rf.readInt();
- tableDirectory.put(tag, tableLocation);
- }
- }
-
- protected void readLoca() throws IOException, DocumentException {
- int tableLocation[];
- tableLocation = (int[])tableDirectory.get("head");
- if (tableLocation == null)
- throw new DocumentException("Table 'head' does not exist in " + fileName);
- rf.seek(tableLocation[TABLE_OFFSET] + HEAD_LOCA_FORMAT_OFFSET);
- locaShortTable = (rf.readUnsignedShort() == 0);
- tableLocation = (int[])tableDirectory.get("loca");
- if (tableLocation == null)
- throw new DocumentException("Table 'loca' does not exist in " + fileName);
- rf.seek(tableLocation[TABLE_OFFSET]);
- if (locaShortTable) {
- int entries = tableLocation[TABLE_LENGTH] / 2;
- locaTable = new int[entries];
- for (int k = 0; k < entries; ++k)
- locaTable[k] = rf.readUnsignedShort() * 2;
- }
- else {
- int entries = tableLocation[TABLE_LENGTH] / 4;
- locaTable = new int[entries];
- for (int k = 0; k < entries; ++k)
- locaTable[k] = rf.readInt();
- }
- }
-
- protected void createNewGlyphTables() throws IOException {
- newLocaTable = new int[locaTable.length];
- int activeGlyphs[] = new int[glyphsInList.size()];
- for (int k = 0; k < activeGlyphs.length; ++k)
- activeGlyphs[k] = ((Integer)glyphsInList.get(k)).intValue();
- Arrays.sort(activeGlyphs);
- int glyfSize = 0;
- for (int k = 0; k < activeGlyphs.length; ++k) {
- int glyph = activeGlyphs[k];
- glyfSize += locaTable[glyph + 1] - locaTable[glyph];
- }
- glyfTableRealSize = glyfSize;
- glyfSize = (glyfSize + 3) & (~3);
- newGlyfTable = new byte[glyfSize];
- int glyfPtr = 0;
- int listGlyf = 0;
- for (int k = 0; k < newLocaTable.length; ++k) {
- newLocaTable[k] = glyfPtr;
- if (listGlyf < activeGlyphs.length && activeGlyphs[listGlyf] == k) {
- ++listGlyf;
- newLocaTable[k] = glyfPtr;
- int start = locaTable[k];
- int len = locaTable[k + 1] - start;
- if (len > 0) {
- rf.seek(tableGlyphOffset + start);
- rf.readFully(newGlyfTable, glyfPtr, len);
- glyfPtr += len;
- }
- }
- }
- }
-
- protected void locaTobytes() {
- if (locaShortTable)
- locaTableRealSize = newLocaTable.length * 2;
- else
- locaTableRealSize = newLocaTable.length * 4;
- newLocaTableOut = new byte[(locaTableRealSize + 3) & (~3)];
- outFont = newLocaTableOut;
- fontPtr = 0;
- for (int k = 0; k < newLocaTable.length; ++k) {
- if (locaShortTable)
- writeFontShort(newLocaTable[k] / 2);
- else
- writeFontInt(newLocaTable[k]);
- }
-
- }
-
- protected void flatGlyphs() throws IOException, DocumentException {
- int tableLocation[];
- tableLocation = (int[])tableDirectory.get("glyf");
- if (tableLocation == null)
- throw new DocumentException("Table 'glyf' does not exist in " + fileName);
- Integer glyph0 = new Integer(0);
- if (!glyphsUsed.containsKey(glyph0)) {
- glyphsUsed.put(glyph0, null);
- glyphsInList.add(glyph0);
- }
- tableGlyphOffset = tableLocation[TABLE_OFFSET];
- for (int k = 0; k < glyphsInList.size(); ++k) {
- int glyph = ((Integer)glyphsInList.get(k)).intValue();
- checkGlyphComposite(glyph);
- }
- }
-
- protected void checkGlyphComposite(int glyph) throws IOException {
- int start = locaTable[glyph];
- if (start == locaTable[glyph + 1]) // no contour
- return;
- rf.seek(tableGlyphOffset + start);
- int numContours = rf.readShort();
- if (numContours >= 0)
- return;
- rf.skipBytes(8);
- for(;;) {
- int flags = rf.readUnsignedShort();
- Integer cGlyph = new Integer(rf.readUnsignedShort());
- if (!glyphsUsed.containsKey(cGlyph)) {
- glyphsUsed.put(cGlyph, null);
- glyphsInList.add(cGlyph);
- }
- if ((flags & MORE_COMPONENTS) == 0)
- return;
- int skip;
- if ((flags & ARG_1_AND_2_ARE_WORDS) != 0)
- skip = 4;
- else
- skip = 2;
- if ((flags & WE_HAVE_A_SCALE) != 0)
- skip += 2;
- else if ((flags & WE_HAVE_AN_X_AND_Y_SCALE) != 0)
- skip += 4;
- if ((flags & WE_HAVE_A_TWO_BY_TWO) != 0)
- skip += 8;
- rf.skipBytes(skip);
- }
- }
-
- /** Reads a <CODE>String</CODE> from the font file as bytes using the Cp1252
- * encoding.
- * @param length the length of bytes to read
- * @return the <CODE>String</CODE> read
- * @throws IOException the font file could not be read
- */
- protected String readStandardString(int length) throws IOException {
- byte buf[] = new byte[length];
- rf.readFully(buf);
- try {
- return new String(buf, BaseFont.WINANSI);
- }
- catch (Exception e) {
- throw new ExceptionConverter(e);
- }
- }
-
- protected void writeFontShort(int n) {
- outFont[fontPtr++] = (byte)(n >> 8);
- outFont[fontPtr++] = (byte)(n);
- }
-
- protected void writeFontInt(int n) {
- outFont[fontPtr++] = (byte)(n >> 24);
- outFont[fontPtr++] = (byte)(n >> 16);
- outFont[fontPtr++] = (byte)(n >> 8);
- outFont[fontPtr++] = (byte)(n);
- }
-
- protected void writeFontString(String s) {
- byte b[] = PdfEncodings.convertToBytes(s, BaseFont.WINANSI);
- System.arraycopy(b, 0, outFont, fontPtr, b.length);
- fontPtr += b.length;
- }
-
- protected int calculateChecksum(byte b[]) {
- int len = b.length / 4;
- int v0 = 0;
- int v1 = 0;
- int v2 = 0;
- int v3 = 0;
- int ptr = 0;
- for (int k = 0; k < len; ++k) {
- v3 += (int)b[ptr++] & 0xff;
- v2 += (int)b[ptr++] & 0xff;
- v1 += (int)b[ptr++] & 0xff;
- v0 += (int)b[ptr++] & 0xff;
- }
- return v0 + (v1 << 8) + (v2 << 16) + (v3 << 24);
- }
-}
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