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Devin Jankowski
2023-06-21 12:46:23 -04:00
commit c70248a520
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iTechSharp/iTextSharp/text/pdf/DocumentFont.cs Normal file
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using System;
using System.Collections;
/*
* Copyright 2004 by 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/
*/
namespace iTextSharp.text.pdf {
public class DocumentFont : BaseFont {
// code, [glyph, width]
private Hashtable metrics = new Hashtable();
private String fontName;
private PRIndirectReference refFont;
private PdfDictionary font;
private IntHashtable uni2byte = new IntHashtable();
private IntHashtable byte2uni = new IntHashtable();
private float Ascender = 800;
private float CapHeight = 700;
private float Descender = -200;
private float ItalicAngle = 0;
private float llx = -50;
private float lly = -200;
private float urx = 100;
private float ury = 900;
private bool isType0 = false;
private BaseFont cjkMirror;
private static String[] cjkNames = {"HeiseiMin-W3", "HeiseiKakuGo-W5", "STSong-Light", "MHei-Medium",
"MSung-Light", "HYGoThic-Medium", "HYSMyeongJo-Medium", "MSungStd-Light", "STSongStd-Light",
"HYSMyeongJoStd-Medium", "KozMinPro-Regular"};
private static String[] cjkEncs = {"UniJIS-UCS2-H", "UniJIS-UCS2-H", "UniGB-UCS2-H", "UniCNS-UCS2-H",
"UniCNS-UCS2-H", "UniKS-UCS2-H", "UniKS-UCS2-H", "UniCNS-UCS2-H", "UniGB-UCS2-H",
"UniKS-UCS2-H", "UniJIS-UCS2-H"};
private static String[] cjkNames2 = {"MSungStd-Light", "STSongStd-Light", "HYSMyeongJoStd-Medium", "KozMinPro-Regular"};
private static String[] cjkEncs2 = {"UniCNS-UCS2-H", "UniGB-UCS2-H", "UniKS-UCS2-H", "UniJIS-UCS2-H",
"UniCNS-UTF16-H", "UniGB-UTF16-H", "UniKS-UTF16-H", "UniJIS-UTF16-H"};
private static int[] stdEnc = {
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
32,33,34,35,36,37,38,8217,40,41,42,43,44,45,46,47,
48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,
80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,
8216,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,
112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,161,162,163,8260,165,402,167,164,39,8220,171,8249,8250,64257,64258,
0,8211,8224,8225,183,0,182,8226,8218,8222,8221,187,8230,8240,0,191,
0,96,180,710,732,175,728,729,168,0,730,184,0,733,731,711,
8212,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,198,0,170,0,0,0,0,321,216,338,186,0,0,0,0,
0,230,0,0,0,305,0,0,322,248,339,223,0,0,0,0};
/** Creates a new instance of DocumentFont */
internal DocumentFont(PRIndirectReference refFont) {
encoding = "";
fontSpecific = false;
this.refFont = refFont;
fontType = FONT_TYPE_DOCUMENT;
font = (PdfDictionary)PdfReader.GetPdfObject(refFont);
fontName = PdfName.DecodeName(((PdfName)PdfReader.GetPdfObject(font.Get(PdfName.BASEFONT))).ToString());
PdfName subType = (PdfName)PdfReader.GetPdfObject(font.Get(PdfName.SUBTYPE));
if (PdfName.TYPE1.Equals(subType) || PdfName.TRUETYPE.Equals(subType))
DoType1TT();
else {
for (int k = 0; k < cjkNames.Length; ++k) {
if (fontName.StartsWith(cjkNames[k])) {
fontName = cjkNames[k];
cjkMirror = BaseFont.CreateFont(fontName, cjkEncs[k], false);
return;
}
}
String enc = PdfName.DecodeName(((PdfName)PdfReader.GetPdfObject(font.Get(PdfName.ENCODING))).ToString());
for (int k = 0; k < cjkEncs2.Length; ++k) {
if (enc.StartsWith(cjkEncs2[k])) {
if (k > 3)
k -= 4;
cjkMirror = BaseFont.CreateFont(cjkNames2[k], cjkEncs2[k], false);
return;
}
}
if (PdfName.TYPE0.Equals(subType) && enc.Equals("Identity-H")) {
ProcessType0(font);
isType0 = true;
}
}
}
private void ProcessType0(PdfDictionary font) {
byte[] touni = PdfReader.GetStreamBytes((PRStream)PdfReader.GetPdfObjectRelease(font.Get(PdfName.TOUNICODE)));
PdfArray df = (PdfArray)PdfReader.GetPdfObjectRelease(font.Get(PdfName.DESCENDANTFONTS));
PdfDictionary cidft = (PdfDictionary)PdfReader.GetPdfObjectRelease((PdfObject)df.ArrayList[0]);
PdfNumber dwo = (PdfNumber)PdfReader.GetPdfObjectRelease(cidft.Get(PdfName.DW));
int dw = 1000;
if (dwo != null)
dw = dwo.IntValue;
IntHashtable widths = ReadWidths((PdfArray)PdfReader.GetPdfObjectRelease(cidft.Get(PdfName.W)));
PdfDictionary fontDesc = (PdfDictionary)PdfReader.GetPdfObjectRelease(cidft.Get(PdfName.FONTDESCRIPTOR));
FillFontDesc(fontDesc);
FillMetrics(touni, widths, dw);
}
private IntHashtable ReadWidths(PdfArray ws) {
IntHashtable hh = new IntHashtable();
if (ws == null)
return hh;
ArrayList ar = ws.ArrayList;
for (int k = 0; k < ar.Count; ++k) {
int c1 = ((PdfNumber)PdfReader.GetPdfObjectRelease((PdfObject)ar[k])).IntValue;
PdfObject obj = PdfReader.GetPdfObjectRelease((PdfObject)ar[++k]);
if (obj.IsArray()) {
ArrayList ar2 = ((PdfArray)obj).ArrayList;
for (int j = 0; j < ar2.Count; ++j) {
int c2 = ((PdfNumber)PdfReader.GetPdfObjectRelease((PdfObject)ar2[j])).IntValue;
hh[c1++] = c2;
}
}
else {
int c2 = ((PdfNumber)obj).IntValue;
int w = ((PdfNumber)PdfReader.GetPdfObjectRelease((PdfObject)ar[++k])).IntValue;
for (; c1 <= c2; ++c1)
hh[c1] = w;
}
}
return hh;
}
private String DecodeString(PdfString ps) {
if (ps.IsHexWriting())
return PdfEncodings.ConvertToString(ps.GetBytes(), "UnicodeBigUnmarked");
else
return ps.ToUnicodeString();
}
private void FillMetrics(byte[] touni, IntHashtable widths, int dw) {
PdfContentParser ps = new PdfContentParser(new PRTokeniser(touni));
PdfObject ob = null;
PdfObject last = null;
while ((ob = ps.ReadPRObject()) != null) {
if (ob.Type == PdfContentParser.COMMAND_TYPE) {
if (ob.ToString().Equals("beginbfchar")) {
int n = ((PdfNumber)last).IntValue;
for (int k = 0; k < n; ++k) {
String cid = DecodeString((PdfString)ps.ReadPRObject());
String uni = DecodeString((PdfString)ps.ReadPRObject());
if (uni.Length == 1) {
int cidc = (int)cid[0];
int unic = (int)uni[uni.Length - 1];
int w = dw;
if (widths.ContainsKey(cidc))
w = widths[cidc];
metrics[unic] = new int[]{cidc, w};
}
}
}
else if (ob.ToString().Equals("beginbfrange")) {
int n = ((PdfNumber)last).IntValue;
for (int k = 0; k < n; ++k) {
String cid1 = DecodeString((PdfString)ps.ReadPRObject());
String cid2 = DecodeString((PdfString)ps.ReadPRObject());
int cid1c = (int)cid1[0];
int cid2c = (int)cid2[0];
PdfObject ob2 = ps.ReadPRObject();
if (ob2.IsString()) {
String uni = DecodeString((PdfString)ob2);
if (uni.Length == 1) {
int unic = (int)uni[uni.Length - 1];
for (; cid1c <= cid2c; cid1c++, unic++) {
int w = dw;
if (widths.ContainsKey(cid1c))
w = widths[cid1c];
metrics[unic] = new int[]{cid1c, w};
}
}
}
else {
ArrayList ar = ((PdfArray)ob2).ArrayList;
for (int j = 0; j < ar.Count; ++j, ++cid1c) {
String uni = DecodeString((PdfString)ar[j]);
if (uni.Length == 1) {
int unic = (int)uni[uni.Length - 1];
int w = dw;
if (widths.ContainsKey(cid1c))
w = widths[cid1c];
metrics[unic] = new int[]{cid1c, w};
}
}
}
}
}
}
else
last = ob;
}
}
private void DoType1TT() {
PdfObject enc = PdfReader.GetPdfObject(font.Get(PdfName.ENCODING));
if (enc == null)
FillEncoding(null);
else {
if (enc.IsName())
FillEncoding((PdfName)enc);
else {
PdfDictionary encDic = (PdfDictionary)enc;
enc = PdfReader.GetPdfObject(encDic.Get(PdfName.BASEENCODING));
if (enc == null)
FillEncoding(null);
else
FillEncoding((PdfName)enc);
PdfArray diffs = (PdfArray)PdfReader.GetPdfObject(encDic.Get(PdfName.DIFFERENCES));
if (diffs != null) {
ArrayList dif = diffs.ArrayList;
int currentNumber = 0;
for (int k = 0; k < dif.Count; ++k) {
PdfObject obj = (PdfObject)dif[k];
if (obj.IsNumber())
currentNumber = ((PdfNumber)obj).IntValue;
else {
int[] c = GlyphList.NameToUnicode(PdfName.DecodeName(((PdfName)obj).ToString()));
if (c != null && c.Length > 0) {
if (byte2uni.ContainsKey(currentNumber)) {
uni2byte.Remove(byte2uni[currentNumber]);
}
uni2byte[c[0]] = currentNumber;
byte2uni[currentNumber] = c[0];
}
++currentNumber;
}
}
}
}
}
PdfArray newWidths = (PdfArray)PdfReader.GetPdfObject(font.Get(PdfName.WIDTHS));
PdfNumber first = (PdfNumber)PdfReader.GetPdfObject(font.Get(PdfName.FIRSTCHAR));
PdfNumber last = (PdfNumber)PdfReader.GetPdfObject(font.Get(PdfName.LASTCHAR));
if (BuiltinFonts14.ContainsKey(fontName)) {
BaseFont bf;
bf = BaseFont.CreateFont(fontName, WINANSI, false);
int[] e = uni2byte.ToOrderedKeys();
for (int k = 0; k < e.Length; ++k) {
int n = uni2byte[e[k]];
widths[n] = bf.GetRawWidth(n, GlyphList.UnicodeToName(e[k]));
}
Ascender = bf.GetFontDescriptor(ASCENT, 1000);
CapHeight = bf.GetFontDescriptor(CAPHEIGHT, 1000);
Descender = bf.GetFontDescriptor(DESCENT, 1000);
ItalicAngle = bf.GetFontDescriptor(ITALICANGLE, 1000);
llx = bf.GetFontDescriptor(BBOXLLX, 1000);
lly = bf.GetFontDescriptor(BBOXLLY, 1000);
urx = bf.GetFontDescriptor(BBOXURX, 1000);
ury = bf.GetFontDescriptor(BBOXURY, 1000);
}
if (first != null && last != null && newWidths != null) {
int f = first.IntValue;
ArrayList ar = newWidths.ArrayList;
for (int k = 0; k < ar.Count; ++k) {
widths[f + k] = ((PdfNumber)ar[k]).IntValue;
}
}
FillFontDesc((PdfDictionary)PdfReader.GetPdfObject(font.Get(PdfName.FONTDESCRIPTOR)));
}
private void FillFontDesc(PdfDictionary fontDesc) {
if (fontDesc == null)
return;
PdfNumber v = (PdfNumber)PdfReader.GetPdfObject(fontDesc.Get(PdfName.ASCENT));
if (v != null)
Ascender = v.FloatValue;
v = (PdfNumber)PdfReader.GetPdfObject(fontDesc.Get(PdfName.CAPHEIGHT));
if (v != null)
CapHeight = v.FloatValue;
v = (PdfNumber)PdfReader.GetPdfObject(fontDesc.Get(PdfName.DESCENT));
if (v != null)
Descender = v.FloatValue;
v = (PdfNumber)PdfReader.GetPdfObject(fontDesc.Get(PdfName.ITALICANGLE));
if (v != null)
ItalicAngle = v.FloatValue;
PdfArray bbox = (PdfArray)PdfReader.GetPdfObject(fontDesc.Get(PdfName.FONTBBOX));
if (bbox != null) {
ArrayList ar = bbox.ArrayList;
llx = ((PdfNumber)ar[0]).FloatValue;
lly = ((PdfNumber)ar[1]).FloatValue;
urx = ((PdfNumber)ar[2]).FloatValue;
ury = ((PdfNumber)ar[3]).FloatValue;
if (llx > urx) {
float t = llx;
llx = urx;
urx = t;
}
if (lly > ury) {
float t = lly;
lly = ury;
ury = t;
}
}
}
private void FillEncoding(PdfName encoding) {
if (PdfName.MAC_ROMAN_ENCODING.Equals(encoding) || PdfName.WIN_ANSI_ENCODING.Equals(encoding)) {
byte[] b = new byte[256];
for (int k = 0; k < 256; ++k)
b[k] = (byte)k;
String enc = WINANSI;
if (PdfName.MAC_ROMAN_ENCODING.Equals(encoding))
enc = MACROMAN;
String cv = PdfEncodings.ConvertToString(b, enc);
char[] arr = cv.ToCharArray();
for (int k = 0; k < 256; ++k) {
uni2byte[arr[k]] = k;
byte2uni[k] = arr[k];
}
}
else {
for (int k = 0; k < 256; ++k) {
uni2byte[stdEnc[k]] = k;
byte2uni[k] = stdEnc[k];
}
}
}
/** Gets the family name of the font. If it is a True Type font
* each array element will have {Platform ID, Platform Encoding ID,
* Language ID, font name}. The interpretation of this values can be
* found in the Open Type specification, chapter 2, in the 'name' table.<br>
* For the other fonts the array has a single element with {"", "", "",
* font name}.
* @return the family name of the font
*
*/
public override string[][] FamilyFontName {
get {
return FullFontName;
}
}
/** Gets the font parameter identified by <CODE>key</CODE>. Valid values
* for <CODE>key</CODE> are <CODE>ASCENT</CODE>, <CODE>CAPHEIGHT</CODE>, <CODE>DESCENT</CODE>,
* <CODE>ITALICANGLE</CODE>, <CODE>BBOXLLX</CODE>, <CODE>BBOXLLY</CODE>, <CODE>BBOXURX</CODE>
* and <CODE>BBOXURY</CODE>.
* @param key the parameter to be extracted
* @param fontSize the font size in points
* @return the parameter in points
*
*/
public override float GetFontDescriptor(int key, float fontSize) {
if (cjkMirror != null)
return cjkMirror.GetFontDescriptor(key, fontSize);
switch (key) {
case AWT_ASCENT:
case ASCENT:
return Ascender * fontSize / 1000;
case CAPHEIGHT:
return CapHeight * fontSize / 1000;
case AWT_DESCENT:
case DESCENT:
return Descender * fontSize / 1000;
case ITALICANGLE:
return ItalicAngle;
case BBOXLLX:
return llx * fontSize / 1000;
case BBOXLLY:
return lly * fontSize / 1000;
case BBOXURX:
return urx * fontSize / 1000;
case BBOXURY:
return ury * fontSize / 1000;
case AWT_LEADING:
return 0;
case AWT_MAXADVANCE:
return (urx - llx) * fontSize / 1000;
}
return 0;
}
/** Gets the full name of the font. If it is a True Type font
* each array element will have {Platform ID, Platform Encoding ID,
* Language ID, font name}. The interpretation of this values can be
* found in the Open Type specification, chapter 2, in the 'name' table.<br>
* For the other fonts the array has a single element with {"", "", "",
* font name}.
* @return the full name of the font
*
*/
public override string[][] FullFontName {
get {
return new string[][]{new string[]{"", "", "", fontName}};
}
}
/** Gets all the entries of the names-table. If it is a True Type font
* each array element will have {Name ID, Platform ID, Platform Encoding ID,
* Language ID, font name}. The interpretation of this values can be
* found in the Open Type specification, chapter 2, in the 'name' table.<br>
* For the other fonts the array has a single element with {"4", "", "", "",
* font name}.
* @return the full name of the font
*/
public override string[][] AllNameEntries {
get {
return new string[][]{new string[]{"4", "", "", "", fontName}};
}
}
/** Gets the kerning between two Unicode chars.
* @param char1 the first char
* @param char2 the second char
* @return the kerning to be applied
*
*/
public override int GetKerning(int char1, int char2) {
return 0;
}
/** Gets the postscript font name.
* @return the postscript font name
*
*/
public override string PostscriptFontName {
get {
return fontName;
}
set {
}
}
/** Gets the width from the font according to the Unicode char <CODE>c</CODE>
* or the <CODE>name</CODE>. If the <CODE>name</CODE> is null it's a symbolic font.
* @param c the unicode char
* @param name the glyph name
* @return the width of the char
*
*/
internal override int GetRawWidth(int c, String name) {
return 0;
}
/** Checks if the font has any kerning pairs.
* @return <CODE>true</CODE> if the font has any kerning pairs
*
*/
public override bool HasKernPairs() {
return false;
}
/** Outputs to the writer the font dictionaries and streams.
* @param writer the writer for this document
* @param ref the font indirect reference
* @param params several parameters that depend on the font type
* @throws IOException on error
* @throws DocumentException error in generating the object
*
*/
internal override void WriteFont(PdfWriter writer, PdfIndirectReference refi, Object[] param) {
}
/**
* Gets the width of a <CODE>char</CODE> in normalized 1000 units.
* @param char1 the unicode <CODE>char</CODE> to get the width of
* @return the width in normalized 1000 units
*/
public override int GetWidth(int char1) {
if (cjkMirror != null)
return cjkMirror.GetWidth(char1);
else if (isType0) {
int[] ws = (int[])metrics[(int)char1];
if (ws != null)
return ws[1];
else
return 0;
}
else
return base.GetWidth(char1);
}
public override int GetWidth(String text) {
if (cjkMirror != null)
return cjkMirror.GetWidth(text);
else if (isType0) {
char[] chars = text.ToCharArray();
int len = chars.Length;
int total = 0;
for (int k = 0; k < len; ++k) {
int[] ws = (int[])metrics[(int)chars[k]];
if (ws != null)
total += ws[1];
}
return total;
}
else
return base.GetWidth(text);
}
internal override byte[] ConvertToBytes(String text) {
if (cjkMirror != null)
return PdfEncodings.ConvertToBytes(text, CJKFont.CJK_ENCODING);
else if (isType0) {
char[] chars = text.ToCharArray();
int len = chars.Length;
byte[] b = new byte[len * 2];
int bptr = 0;
for (int k = 0; k < len; ++k) {
int[] ws = (int[])metrics[(int)chars[k]];
if (ws != null) {
int g = ws[0];
b[bptr++] = (byte)(g / 256);
b[bptr++] = (byte)(g);
}
}
if (bptr == b.Length)
return b;
else {
byte[] nb = new byte[bptr];
System.Array.Copy(b, 0, nb, 0, bptr);
return nb;
}
}
else {
char[] cc = text.ToCharArray();
byte[] b = new byte[cc.Length];
int ptr = 0;
for (int k = 0; k < cc.Length; ++k) {
if (uni2byte.ContainsKey(cc[k]))
b[ptr++] = (byte)uni2byte[cc[k]];
}
if (ptr == b.Length)
return b;
else {
byte[] b2 = new byte[ptr];
System.Array.Copy(b, 0, b2, 0, ptr);
return b2;
}
}
}
internal override byte[] ConvertToBytes(int char1) {
if (cjkMirror != null)
return PdfEncodings.ConvertToBytes((char)char1, CJKFont.CJK_ENCODING);
else if (isType0) {
int[] ws = (int[])metrics[(int)char1];
if (ws != null) {
int g = ws[0];
return new byte[]{(byte)(g / 256), (byte)(g)};
}
else
return new byte[0];
}
else {
if (uni2byte.ContainsKey(char1))
return new byte[]{(byte)uni2byte[char1]};
else
return new byte[0];
}
}
internal PdfIndirectReference IndirectReference {
get {
return refFont;
}
}
public override bool CharExists(int c) {
if (cjkMirror != null)
return cjkMirror.CharExists(c);
else if (isType0) {
return metrics.ContainsKey((int)c);
}
else
return base.CharExists(c);
}
public override bool SetKerning(int char1, int char2, int kern) {
return false;
}
public override int[] GetCharBBox(int c) {
return null;
}
protected override int[] GetRawCharBBox(int c, String name) {
return null;
}
}
}