private byte[] GetDecompressedData()
{
Decompressor decompressor = new Decompressor(data);
return decompressor.GetDecompressedData();
}
public SortedDictionary<Int32, PDFobj> Read(Stream inputStream)
{
List<PDFobj> objects = new List<PDFobj>();
MemoryStream baos = new MemoryStream();
int ch;
while ((ch = inputStream.ReadByte()) != -1) {
baos.WriteByte((byte) ch);
}
byte[] pdf = baos.ToArray();
int xref = GetStartXRef(pdf);
PDFobj obj1 = GetObject(pdf, xref);
if (obj1.dict[0].Equals("xref")) {
GetObjects1(pdf, obj1, objects);
}
else {
GetObjects2(pdf, obj1, objects);
}
SortedDictionary<Int32, PDFobj> pdfObjects = new SortedDictionary<Int32, PDFobj>();
foreach (PDFobj obj in objects) {
if (obj.dict.Contains("stream")) {
obj.SetStream(pdf, obj.GetLength(objects));
if (obj.GetValue("/Filter").Equals("/FlateDecode")) {
Decompressor decompressor = new Decompressor(obj.stream);
obj.data = decompressor.GetDecompressedData();
}
else {
// Assume no compression.
obj.data = obj.stream;
}
}
if (obj.GetValue("/Type").Equals("/ObjStm")) {
int n = Int32.Parse(obj.GetValue("/N"));
int first = Int32.Parse(obj.GetValue("/First"));
PDFobj o2 = GetObject(obj.data, 0, first);
for (int i = 0; i < o2.dict.Count; i += 2) {
int num = Int32.Parse(o2.dict[i]);
int off = Int32.Parse(o2.dict[i + 1]);
int end = obj.data.Length;
if (i <= o2.dict.Count - 4) {
end = first + Int32.Parse(o2.dict[i + 3]);
}
PDFobj o3 = GetObject(obj.data, first + off, end);
o3.dict.Insert(0, "obj");
o3.dict.Insert(0, "0");
o3.dict.Insert(0, num.ToString());
pdfObjects[num] = o3;
}
}
else {
pdfObjects[obj.number] = obj;
}
}
return pdfObjects;
}
private void GetObjects2(
byte[] pdf,
PDFobj obj,
List<PDFobj> objects)
{
String prev = obj.GetValue("/Prev");
if (!prev.Equals("")) {
GetObjects2(
pdf,
GetObject(pdf, Int32.Parse(prev)),
objects);
}
obj.SetStream(pdf, Int32.Parse(obj.GetValue("/Length")));
try {
Decompressor decompressor = new Decompressor(obj.stream);
obj.data = decompressor.GetDecompressedData();
}
catch (Exception e) {
// Assume no compression.
obj.data = obj.stream;
}
int p1 = 0; // Predictor byte
int f1 = 0; // Field 1
int f2 = 0; // Field 2
int f3 = 0; // Field 3
for (int i = 0; i < obj.dict.Count; i++) {
String token = obj.dict[i];
if (token.Equals("/Predictor")) {
if (obj.dict[i + 1].Equals("12")) {
p1 = 1;
}
}
if (token.Equals("/W")) {
// "/W [ 1 3 1 ]"
f1 = Int32.Parse(obj.dict[i + 2]);
f2 = Int32.Parse(obj.dict[i + 3]);
f3 = Int32.Parse(obj.dict[i + 4]);
}
}
int n = p1 + f1 + f2 + f3; // Number of bytes per entry
byte[] entry = new byte[n];
for (int i = 0; i < obj.data.Length; i += n) {
// Apply the 'Up' filter.
for (int j = 0; j < n; j++) {
entry[j] += obj.data[i + j];
}
// Process the entries in a cross-reference stream
// Page 51 in PDF32000_2008.pdf
if (entry[p1] == 1) { // Type 1 entry
PDFobj o2 = GetObject(pdf, ToInt(entry, p1 + f1, f2));
o2.number = Int32.Parse(o2.dict[0]);
objects.Add(o2);
}
}
}
internal static void Register(
PDF pdf,
Font font,
Stream inputStream)
{
int len = inputStream.ReadByte();
byte[] fontName = new byte[len];
inputStream.Read(fontName, 0, len);
font.name = System.Text.Encoding.UTF8.GetString(fontName, 0, len);
// Console.WriteLine(font.name);
len = GetInt24(inputStream);
byte[] fontInfo = new byte[len];
inputStream.Read(fontInfo, 0, len);
font.info = System.Text.Encoding.UTF8.GetString(fontInfo, 0, len);
// Console.WriteLine(font.info);
byte[] buf = new byte[GetInt32(inputStream)];
inputStream.Read(buf, 0, buf.Length);
Decompressor decompressor = new Decompressor(buf);
MemoryStream stream =
new MemoryStream(decompressor.GetDecompressedData());
font.unitsPerEm = GetInt32(stream);
font.bBoxLLx = GetInt32(stream);
font.bBoxLLy = GetInt32(stream);
font.bBoxURx = GetInt32(stream);
font.bBoxURy = GetInt32(stream);
font.ascent = GetInt32(stream);
font.descent = GetInt32(stream);
font.firstChar = GetInt32(stream);
font.lastChar = GetInt32(stream);
font.capHeight = GetInt32(stream);
font.underlinePosition = GetInt32(stream);
font.underlineThickness = GetInt32(stream);
len = GetInt32(stream);
font.advanceWidth = new int[len];
for (int i = 0; i < len; i++)
{
font.advanceWidth[i] = GetInt16(stream);
}
len = GetInt32(stream);
font.glyphWidth = new int[len];
for (int i = 0; i < len; i++)
{
font.glyphWidth[i] = GetInt16(stream);
}
len = GetInt32(stream);
font.unicodeToGID = new int[len];
for (int i = 0; i < len; i++)
{
font.unicodeToGID[i] = GetInt16(stream);
}
font.cff = (inputStream.ReadByte() == 'Y') ? true : false;
font.uncompressed_size = GetInt32(inputStream);
font.compressed_size = GetInt32(inputStream);
EmbedFontFile(pdf, font, inputStream);
AddFontDescriptorObject(pdf, font);
AddCIDFontDictionaryObject(pdf, font);
AddToUnicodeCMapObject(pdf, font);
// Type0 Font Dictionary
pdf.Newobj();
pdf.Append("<<\n");
pdf.Append("/Type /Font\n");
pdf.Append("/Subtype /Type0\n");
pdf.Append("/BaseFont /");
pdf.Append(font.name);
pdf.Append('\n');
pdf.Append("/Encoding /Identity-H\n");
pdf.Append("/DescendantFonts [");
pdf.Append(font.GetCidFontDictObjNumber());
pdf.Append(" 0 R]\n");
pdf.Append("/ToUnicode ");
pdf.Append(font.GetToUnicodeCMapObjNumber());
pdf.Append(" 0 R\n");
pdf.Append(">>\n");
pdf.Endobj();
font.objNumber = pdf.objNumber;
}
private byte[] GetDecompressedData()
{
Decompressor decompressor = new Decompressor(data);
return(decompressor.GetDecompressedData());
}
internal static void Register(
SortedDictionary <Int32, PDFobj> objects,
Font font,
Stream inputStream)
{
int len = inputStream.ReadByte();
byte[] fontName = new byte[len];
inputStream.Read(fontName, 0, len);
font.name = System.Text.Encoding.UTF8.GetString(fontName, 0, len);
// Console.WriteLine(font.name);
len = GetInt24(inputStream);
byte[] fontInfo = new byte[len];
inputStream.Read(fontInfo, 0, len);
font.info = System.Text.Encoding.UTF8.GetString(fontInfo, 0, len);
// Console.WriteLine(font.info);
byte[] buf = new byte[GetInt32(inputStream)];
inputStream.Read(buf, 0, buf.Length);
Decompressor decompressor = new Decompressor(buf);
MemoryStream stream =
new MemoryStream(decompressor.GetDecompressedData());
font.unitsPerEm = GetInt32(stream);
font.bBoxLLx = GetInt32(stream);
font.bBoxLLy = GetInt32(stream);
font.bBoxURx = GetInt32(stream);
font.bBoxURy = GetInt32(stream);
font.ascent = GetInt32(stream);
font.descent = GetInt32(stream);
font.firstChar = GetInt32(stream);
font.lastChar = GetInt32(stream);
font.capHeight = GetInt32(stream);
font.underlinePosition = GetInt32(stream);
font.underlineThickness = GetInt32(stream);
len = GetInt32(stream);
font.advanceWidth = new int[len];
for (int i = 0; i < len; i++)
{
font.advanceWidth[i] = GetInt16(stream);
}
len = GetInt32(stream);
font.glyphWidth = new int[len];
for (int i = 0; i < len; i++)
{
font.glyphWidth[i] = GetInt16(stream);
}
len = GetInt32(stream);
font.unicodeToGID = new int[len];
for (int i = 0; i < len; i++)
{
font.unicodeToGID[i] = GetInt16(stream);
}
font.cff = (inputStream.ReadByte() == 'Y') ? true : false;
font.uncompressed_size = GetInt32(inputStream);
font.compressed_size = GetInt32(inputStream);
EmbedFontFile(objects, font, inputStream);
AddFontDescriptorObject(objects, font);
AddCIDFontDictionaryObject(objects, font);
AddToUnicodeCMapObject(objects, font);
// Type0 Font Dictionary
PDFobj obj = new PDFobj();
List <String> dict = obj.GetDict();
dict.Add("<<");
dict.Add("/Type");
dict.Add("/Font");
dict.Add("/Subtype");
dict.Add("/Type0");
dict.Add("/BaseFont");
dict.Add("/" + font.name);
dict.Add("/Encoding");
dict.Add("/Identity-H");
dict.Add("/DescendantFonts");
dict.Add("[");
dict.Add(font.GetCidFontDictObjNumber().ToString());
dict.Add("0");
dict.Add("R");
dict.Add("]");
dict.Add("/ToUnicode");
dict.Add(font.GetToUnicodeCMapObjNumber().ToString());
dict.Add("0");
dict.Add("R");
dict.Add(">>");
obj.number = MaxKey(objects.Keys) + 1;
objects.Add(obj.number, obj);
font.objNumber = obj.number;
}