/**
* Rebuild a font subset.
*/
protected override void BuildSubset(Bytes.Buffer ttfSubset, string tag, Dictionary <int, int> gidToCid)
{
// build CID2GIDMap, because the content stream has been written with the old GIDs
Dictionary <int, int> cidToGid = new Dictionary <int, int>(gidToCid.Count);
foreach (var entry in gidToCid)
{
//(newGID, oldGID)->
cidToGid[entry.Value] = entry.Key;
}
// build unicode mapping before subsetting as the subsetted font won't have a cmap
BuildToUnicodeCMap(gidToCid);
// build vertical metrics before subsetting as the subsetted font won't have vhea, vmtx
if (vertical)
{
BuildVerticalMetrics(cidToGid);
}
// rebuild the relevant part of the font
BuildFontFile2(ttfSubset);
AddNameTag(tag);
BuildWidths(cidToGid);
BuildCIDToGIDMap(cidToGid);
BuildCIDSet(cidToGid);
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
Value = System.Text.Encoding.ASCII.GetString(buffer.ReadBytes((int)Table.ElementSize - 8));
}
public override byte[] Decode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
var jbig2Image = new Jbig2Image();
var chunks = new List <ImageChunk>();
if (parameters is PdfDictionary parametersDict)
{
var globalsStream = parametersDict.Resolve(PdfName.JBIG2Globals);
if (globalsStream is PdfStream pdfStream)
{
var globals = pdfStream.ExtractBody(true).GetBuffer();
chunks.Add(new ImageChunk(data: globals, start: 0, end: globals.Length));
}
}
var buffer = data.GetBuffer();
chunks.Add(new ImageChunk(data: buffer, start: 0, end: buffer.Length));
var imageData = jbig2Image.ParseChunks(chunks);
var dataLength = imageData.Length;
// JBIG2 had black as 1 and white as 0, inverting the colors
for (var i = 0; i < dataLength; i++)
{
imageData[i] ^= 0xff;
}
return(imageData);
}
internal void Load(Bytes.Buffer buffer)
{
SettingId = (ICCDeviceSettingsIds)buffer.ReadUnsignedInt();
Size = buffer.ReadUnsignedInt();
Count = buffer.ReadUnsignedInt();
Values = new ICCDeviceSettingValue[Count];
for (int i = 0; i < Count; i++)
{
var settingValue = (ICCDeviceSettingValue)null;
if (SettingId == ICCDeviceSettingsIds.Resolution)
{
settingValue = new ICCDeviceSettingResolutiuon();
}
if (SettingId == ICCDeviceSettingsIds.MediaType)
{
settingValue = new ICCDeviceSettingMediaType();
}
if (SettingId == ICCDeviceSettingsIds.Halftone)
{
settingValue = new ICCDeviceSettingHalftone();
}
settingValue.Load(buffer);
Values[i] = settingValue;
}
}
/**
* Constructs a new Type1Font object from a .pfb stream.
*
* @param pfbStream .pfb input stream, including headers
* @return a type1 font
*
* @throws IOException if something went wrong
*/
public static Type1Font CreateWithPFB(Bytes.Buffer pfbStream)
{
PfbParser pfb = new PfbParser(pfbStream);
Type1Parser parser = new Type1Parser();
return(parser.Parse(pfb.GetSegment1().ToArray(), pfb.GetSegment2().ToArray()));
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
Value.Load(buffer);
}
public override byte[] Decode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
// get decode parameters
PdfDictionary decodeParms = parameters as PdfDictionary;
var ccittFaxParams = new CCITTFaxParams(
K: decodeParms.GetInt(PdfName.K),
endOfLine: decodeParms.GetBool(PdfName.EndOfLine),
encodedByteAlign: decodeParms.GetBool(PdfName.EncodedByteAlign),
columns: decodeParms.GetInt(PdfName.Columns),
rows: decodeParms.GetInt(PdfName.Rows),
endOfBlock: decodeParms.GetBool(PdfName.EndOfBlock),
blackIs1: decodeParms.GetBool(PdfName.BlackIs1)
);
var decoder = new CCITTFaxDecoder(data, ccittFaxParams);
using (var output = new Bytes.Buffer())
{
var currentByte = 0;
while ((currentByte = decoder.ReadNextChar()) > -1)
{
output.Append(FiltersExtension.ToByte(currentByte));
}
return(output.GetBuffer());
}
}
private void BuildToUnicodeCMap(Dictionary <int, int> newGIDToOldCID)
{
ToUnicodeWriter toUniWriter = new ToUnicodeWriter();
bool hasSurrogates = false;
for (int gid = 1, max = ttf.MaximumProfile.NumGlyphs; gid <= max; gid++)
{
// optional CID2GIDMap for subsetting
int cid;
if (newGIDToOldCID != null)
{
if (!newGIDToOldCID.TryGetValue(gid, out cid))
{
continue;
}
}
else
{
cid = gid;
}
// skip composite glyph components that have no code point
List <int> codes = cmapLookup.GetCharCodes(cid); // old GID -> Unicode
if (codes != null)
{
// use the first entry even for ambiguous mappings
int codePoint = codes[0];
if (codePoint > 0xFFFF)
{
hasSurrogates = true;
}
toUniWriter.Add(cid, new string(new char[] { (char)codePoint }, 0, 1));
}
}
using (var output = new MemoryStream())
{
toUniWriter.WriteTo(output);
var cMapStream = new Bytes.Buffer(output.ToArray());
var header = new PdfDictionary()
{
{ PdfName.Length, PdfInteger.Get(cMapStream.Length) }
};
PdfStream stream = new PdfStream(header, cMapStream);
// surrogate code points, requires PDF 1.5
if (hasSurrogates)
{
var version = document.Version;
if (version.GetFloat() < 1.5)
{
document.Version = new Version(1, 5);
}
}
dict[PdfName.ToUnicode] = document.File.Register(stream);
}
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
var count = (int)Table.ElementSize - 8;
Value = buffer.ReadBytes(count);
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
Illuminant.Load(buffer);
Surround.Load(buffer);
MeasurmentType = buffer.ReadUnsignedInt();
}
public void Load(Bytes.Buffer buffer)
{
DeviceManufacturer = buffer.ReadUnsignedInt();
DeviceModel = buffer.ReadUnsignedInt();
DeviceAttributes.Load(buffer);
DeviceTechnology = buffer.ReadUnsignedInt();
ManufacturerDescription = System.Text.Encoding.ASCII.GetString(buffer.ReadNullTermitaded());
ModelDescription = System.Text.Encoding.ASCII.GetString(buffer.ReadNullTermitaded());
}
public void Load(Bytes.Buffer buffer)
{
Year = buffer.ReadUnsignedShort();
Month = buffer.ReadUnsignedShort();
Day = buffer.ReadUnsignedShort();
Hours = buffer.ReadUnsignedShort();
Minutes = buffer.ReadUnsignedShort();
Seconds = buffer.ReadUnsignedShort();
}
private byte[] DoLZWDecode(Bytes.Buffer input, int earlyChange)
{
List <byte[]> codeTable = new List <byte[]>();
int chunk = 9;
var decoded = new Bytes.Buffer();
long nextCommand;
long prevCommand = -1;
try
{
while ((nextCommand = input.ReadBits(chunk)) != EOD)
{
if (nextCommand == CLEAR_TABLE)
{
chunk = 9;
codeTable = CreateCodeTable();
prevCommand = -1;
}
else
{
if (nextCommand < codeTable.Count)
{
byte[] data = codeTable[(int)nextCommand];
byte firstByte = data[0];
decoded.Write(data);
if (prevCommand != -1)
{
CheckIndexBounds(codeTable, prevCommand, input);
data = codeTable[(int)prevCommand];
byte[] newData = data.CopyOf(data.Length + 1);
newData[data.Length] = firstByte;
codeTable.Add(newData);
}
}
else
{
CheckIndexBounds(codeTable, prevCommand, input);
byte[] data = codeTable[(int)prevCommand];
byte[] newData = data.CopyOf(data.Length + 1);
newData[data.Length] = data[0];
decoded.Write(newData);
codeTable.Add(newData);
}
chunk = CalculateChunk(codeTable.Count, earlyChange);
prevCommand = nextCommand;
}
}
}
catch (Exception ex)
{
Debug.WriteLine("warn: Premature EOF input LZW stream, EOD code missing " + ex);
}
return(decoded.GetBuffer());
}
private void CheckIndexBounds(List <byte[]> codeTable, long index, Bytes.Buffer input)
{
if (index < 0)
{
throw new IOException($"negative array index: {index} near offset {input.Position}");
}
if (index >= codeTable.Count)
{
throw new IOException($"array index overflow: {index} >= {codeTable.Count} near offset {input.Position}");
}
}
public override byte[] Decode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
using (MemoryStream outputStream = new MemoryStream())
using (MemoryStream inputStream = new MemoryStream(data.GetBuffer(), 0, (int)data.Length))
using (DeflateStream inputFilter = new DeflateStream(inputStream, CompressionMode.Decompress))
{
inputStream.Position = 2; // Skips zlib's 2-byte header [RFC 1950] [FIX:0.0.8:JCT].
Transform(inputFilter, outputStream);
inputFilter.Close();
return(DecodePredictor(outputStream.ToArray(), parameters, header));
}
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
VendorSpecificFlag = buffer.ReadUnsignedInt();
Count = buffer.ReadUnsignedInt();
Prefix = System.Text.Encoding.ASCII.GetString(buffer.ReadNullTermitaded());
Suffix = System.Text.Encoding.ASCII.GetString(buffer.ReadNullTermitaded());
FirstColor = System.Text.Encoding.ASCII.GetString(buffer.ReadNullTermitaded());
//....color coordinates. Color space of data
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
DataFlag = buffer.ReadUnsignedInt();
ByteValue = new byte[Table.ElementSize - 12];
if (DataFlag == 0x00000000)
{
StringValue = System.Text.Encoding.ASCII.GetString(ByteValue);
}
}
internal void Load(Bytes.Buffer buffer)
{
Size = buffer.ReadUnsignedInt();
Count = buffer.ReadUnsignedInt();
Setttings = new ICCDeviceSetting[Count];
for (int i = 0; i < Count; i++)
{
var setting = new ICCDeviceSetting();
setting.Load(buffer);
Setttings[i] = setting;
}
}
public static ICCProfile Load(byte[] data)
{
var profile = new ICCProfile();
var header = new ICCHeader();
var buffer = new Bytes.Buffer(data);
header.ProfileSize = buffer.ReadUnsignedInt();
header.CMMTypeSignature = buffer.ReadUnsignedInt();
header.ProfileVersionNumber.Major = (byte)buffer.ReadByte();
header.ProfileVersionNumber.Minor = (byte)buffer.ReadByte();
header.ProfileVersionNumber.Reserv1 = (byte)buffer.ReadByte();
header.ProfileVersionNumber.Reserv2 = (byte)buffer.ReadByte();
header.ProfileDeviceClassSignature = (ICCProfileDeviceSignatures)buffer.ReadUnsignedInt();
header.ColorSpaceOfData = (ICCColorSpaceSignatures)buffer.ReadUnsignedInt();
header.ProfileConnectionSpace = (ICCColorSpaceSignatures)buffer.ReadUnsignedInt();
header.DateCreated.Load(buffer);
header.acsp = buffer.ReadUnsignedInt();
header.PrimaryPlatformSignature = (ICCPrimaryPlatformSignatures)buffer.ReadUnsignedInt();
header.Flags = (ICCProfileFlags)buffer.ReadUnsignedInt();
header.DeviceManufacturer = buffer.ReadUnsignedInt();
header.DeviceModel = buffer.ReadUnsignedInt();
header.DeviceAttributes.Load(buffer);
header.RenderingIntent.Intents = buffer.ReadUnsignedShort();
header.RenderingIntent.Reserved = buffer.ReadUnsignedShort();
header.XYZ.Load(buffer);
header.ProfileCreatorSignature = buffer.ReadUnsignedInt();
header.FutureUse = new byte[44];
buffer.Read(header.FutureUse);
profile.Header = header;
var tagCount = buffer.ReadUnsignedInt();
for (int i = 0; i < tagCount; i++)
{
var tag = new ICCTagTable();
tag.Signature = (ICCTagTypes)buffer.ReadUnsignedInt();
tag.Offset = buffer.ReadUnsignedInt();
tag.ElementSize = buffer.ReadUnsignedInt();
profile.Tags[tag.Signature] = tag;
}
foreach (var tagTable in profile.Tags.Values)
{
buffer.Seek(tagTable.Offset);
var key = buffer.ReadUnsignedInt();
if (Types.TryGetValue(key, out var type))
{
tagTable.Tag = (ICCTag)Activator.CreateInstance(type, tagTable);
tagTable.Tag.Profile = profile;
tagTable.Tag.Load(buffer);
}
}
return(profile);
}
public override byte[] Encode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
byte[] decodedBlock = new byte[4];
byte[] encodedBlock = new byte[5];
StringBuilder buffer = new StringBuilder((int)(data.Length * (encodedBlock.Length / decodedBlock.Length)));
int linePos = 0;
if (EnforceMarks)
{
AppendString(buffer, PrefixMark, ref linePos);
}
int count = 0;
uint tuple = 0;
foreach (byte dataByte in data.GetBuffer())
{
if (count >= decodedBlock.Length - 1)
{
tuple |= dataByte;
if (tuple == 0)
{
AppendChar(buffer, 'z', ref linePos);
}
else
{
EncodeBlock(encodedBlock, buffer, ref tuple, ref linePos);
}
tuple = 0;
count = 0;
}
else
{
tuple |= (uint)(dataByte << (24 - (count * 8)));
count++;
}
}
// if we have some bytes left over at the end..
if (count > 0)
{
EncodeBlock(encodedBlock, count + 1, buffer, ref tuple, ref linePos);
}
if (EnforceMarks)
{
AppendString(buffer, SuffixMark, ref linePos);
}
return(ASCIIEncoding.UTF8.GetBytes(buffer.ToString()));
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
var count = (Table.ElementSize - 8) / 4;
Value = new float[count];
for (int i = 0; i < count; i++)
{
Value[i] = buffer.ReadFixed32();
}
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
Flag = (ICCScreeningFlag)buffer.ReadUnsignedInt();
NumberOfChannels = buffer.ReadUnsignedInt();
Channels = new ICCScreeningChannel[NumberOfChannels];
for (int i = 0; i < NumberOfChannels; i++)
{
Channels[i].Load(buffer);
}
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
Count = buffer.ReadUnsignedInt();
for (int i = 0; i < Count; i++)
{
var structure = new ICCProfileDescriptionStructure();
structure.Load(buffer);
Structures.Add(structure);
}
}
internal void Load(Bytes.Buffer buffer)
{
PlatformId = (ICCPrimaryPlatformSignatures)buffer.ReadUnsignedInt();
Size = buffer.ReadUnsignedInt();
Count = buffer.ReadUnsignedInt();
SetttingCombinations = new ICCDeviceSettingsCombination[Count];
for (int i = 0; i < Count; i++)
{
var setting = new ICCDeviceSettingsCombination();
setting.Load(buffer);
SetttingCombinations[i] = setting;
}
}
public override void Load(Bytes.Buffer buffer)
{
buffer.Seek(Table.Offset);
buffer.ReadUnsignedInt();
buffer.ReadUnsignedInt();
Count = buffer.ReadUnsignedInt();
Description = System.Text.Encoding.ASCII.GetString(buffer.ReadBytes((int)Count));
UnicodeCode = buffer.ReadUnsignedInt();
UnicodeCount = buffer.ReadUnsignedInt();
ScriptcodeCode = buffer.ReadUnsignedShort();
ScriptcodeCount = (byte)buffer.ReadByte();
MacDescription = System.Text.Encoding.ASCII.GetString(buffer.ReadBytes(67));
}
public override byte[] Decode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
var imageParams = header;
var dictHeight = ((IPdfNumber)(header[PdfName.Height] ?? header[PdfName.H])).IntValue;
var dictWidth = ((IPdfNumber)(header[PdfName.Width] ?? header[PdfName.W])).IntValue;
var bitsPerComponent = ((IPdfNumber)imageParams[PdfName.BitsPerComponent])?.IntValue ?? 8;
var flag = imageParams[PdfName.ImageMask] as PdfBoolean;
var jpegOptions = new JpegOptions(decodeTransform: null, colorTransform: null);
// Checking if values need to be transformed before conversion.
var decodeObj = imageParams[PdfName.Decode] ?? imageParams[PdfName.D];
var decodeArr = decodeObj?.Resolve() as PdfArray;
if (false && decodeArr != null)
{
var decode = decodeArr.Select(p => ((IPdfNumber)p).IntValue).ToArray();
var decodeArrLength = decodeArr.Count;
var transform = new int[decodeArr.Count];
var transformNeeded = false;
var maxValue = (1 << bitsPerComponent) - 1;
for (var i = 0; i < decodeArrLength; i += 2)
{
transform[i] = ((decode[i + 1] - decode[i]) * 256) | 0;
transform[i + 1] = (decode[i] * maxValue) | 0;
if (transform[i] != 256 || transform[i + 1] != 0)
{
transformNeeded = true;
}
}
if (transformNeeded)
{
jpegOptions.DecodeTransform = transform;
}
}
// Fetching the 'ColorTransform' entry, if it exists.
if (parameters is PdfDictionary paramDict)
{
var colorTransform = paramDict[PdfName.ColorTransform];
if (colorTransform is IPdfNumber number)
{
jpegOptions.ColorTransform = number.IntValue;
}
}
var jpegImage = new JpegImage(jpegOptions);
jpegImage.Parse(data.GetBuffer());
var buffer = jpegImage.GetData(width: dictWidth, height: dictHeight, forceRGB: false, isSourcePDF: true);
return(buffer);
}
//BEWARE: codeTable must be local to each method, because there is only
// one instance of each filter
public override byte[] Decode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
PdfDictionary decodeParams = (PdfDictionary)parameters;
int earlyChange = decodeParams?.GetInt(PdfName.EarlyChange, 1) ?? 1;
if (earlyChange != 0 && earlyChange != 1)
{
earlyChange = 1;
}
var result = DoLZWDecode(data, earlyChange);
return(DecodePredictor(result, parameters, header));
}
/**
* Read the pdf input.
* @param in The input.
* @return Returns the pdf-array.
* @throws IOException if an IO-error occurs.
*/
private byte[] ReadPfbInput(Bytes.Buffer input)
{
// copy into an array
using (var output = new MemoryStream())
{
byte[] tmpbuf = new byte[BUFFER_SIZE];
int amountRead = -1;
while ((amountRead = input.Read(tmpbuf)) > 0)
{
output.Write(tmpbuf, 0, amountRead);
}
return(output.ToArray());
}
}
public override byte[] Encode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
using (MemoryStream inputStream = new MemoryStream(data.GetBuffer(), 0, (int)data.Length))
using (MemoryStream outputStream = new MemoryStream())
using (DeflateStream outputFilter = new DeflateStream(outputStream, CompressionMode.Compress, true))
{
// Add zlib's 2-byte header [RFC 1950] [FIX:0.0.8:JCT]!
outputStream.WriteByte(0x78); // CMF = {CINFO (bits 7-4) = 7; CM (bits 3-0) = 8} = 0x78.
outputStream.WriteByte(0xDA); // FLG = {FLEVEL (bits 7-6) = 3; FDICT (bit 5) = 0; FCHECK (bits 4-0) = {31 - ((CMF * 256 + FLG - FCHECK) Mod 31)} = 26} = 0xDA.
Transform(inputStream, outputFilter);
outputFilter.Close();
return(outputStream.ToArray());
}
}
public override byte[] Decode(Bytes.Buffer data, PdfDirectObject parameters, IDictionary <PdfName, PdfDirectObject> header)
{
var imageParams = header;
//var width = imageParams.Resolve(PdfName.Width) as PdfInteger;
//var height = imageParams.Resolve(PdfName.Height) as PdfInteger;
var bpp = imageParams[PdfName.BitsPerComponent] as PdfInteger;
var flag = imageParams[PdfName.ImageMask] as PdfBoolean;
var jpxImage = new JpxImage();
jpxImage.Parse(data.GetBuffer());
var width = jpxImage.width;
var height = jpxImage.height;
var componentsCount = jpxImage.componentsCount;
var tileCount = jpxImage.tiles.Count;
var buffer = (byte[])null;
if (tileCount == 1)
{
buffer = jpxImage.tiles[0].items;
}
else
{
buffer = new byte[width * height * componentsCount];
for (var k = 0; k < tileCount; k++)
{
var tileComponents = jpxImage.tiles[k];
var tileWidth = tileComponents.Width;
var tileHeight = tileComponents.Height;
var tileLeft = tileComponents.Left;
var tileTop = tileComponents.Top;
var src = tileComponents.items;
var srcPosition = 0;
var dataPosition = (width * tileTop + tileLeft) * componentsCount;
var imgRowSize = width * componentsCount;
var tileRowSize = tileWidth * componentsCount;
for (var j = 0; j < tileHeight; j++)
{
var rowBytes = src.SubArray(srcPosition, srcPosition + tileRowSize);
buffer.Set(rowBytes, dataPosition);
srcPosition += tileRowSize;
dataPosition += imgRowSize;
}
}
}
return(buffer);
}
