/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @ If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
int version = data.ReadUnsignedShort();
if (version != 0)
{
version = (version << 16) | data.ReadUnsignedShort();
}
int numSubtables = 0;
if (version == 0)
{
numSubtables = data.ReadUnsignedShort();
}
else if (version == 1)
{
numSubtables = (int)data.ReadUnsignedInt();
}
else
{
Debug.WriteLine($"debug: Skipped kerning table due to an unsupported kerning table version: {version}");
}
if (numSubtables > 0)
{
subtables = new KerningSubtable[numSubtables];
for (int i = 0; i < numSubtables; ++i)
{
KerningSubtable subtable = new KerningSubtable();
subtable.Read(data, version);
subtables[i] = subtable;
}
}
initialized = true;
}
/**
* Run the callback for each TT font in the collection.
*
* @param trueTypeFontProcessor the object with the callback method.
* @
*/
public void ProcessAllFonts(ITrueTypeFontProcessor trueTypeFontProcessor, object tag)
{
for (int i = 0; i < numFonts; i++)
{
TrueTypeFont font = GetFontAtIndex(i);
trueTypeFontProcessor(font, tag);
}
}
/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @throws java.io.IOException If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
byte[] bytes = data.Read((int)Length);
CFFParser parser = new CFFParser();
cffFont = parser.Parse(bytes, new CFFBytesource(font))[0];
initialized = true;
}
/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @ If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
loca = ttf.IndexToLocation;
numGlyphs = ttf.NumberOfGlyphs;
glyphs = new Dictionary <int, GlyphData>();
// we don't actually read the complete table here because it can contain tens of thousands of glyphs
this.data = data;
initialized = true;
}
/**
* Get a TT font from a collection.
*
* @param name The postscript name of the font.
* @return The found font, nor null if none is found.
* @
*/
public TrueTypeFont GetFontByName(string name)
{
for (int i = 0; i < numFonts; i++)
{
TrueTypeFont font = GetFontAtIndex(i);
if (font.Name.Equals(name, StringComparison.Ordinal))
{
return(font);
}
}
return(null);
}
/**
* Creates a subsetter for the given font.
*
* @param ttf the font to be subset
* @param tables optional tables to keep if present
*/
public TTFSubsetter(TrueTypeFont ttf, List <string> tables)
{
this.ttf = ttf;
this.keepTables = tables;
uniToGID = new SortedDictionary <int, int>();
glyphIds = new SortedSet <int>();
// find the best Unicode cmap
this.unicodeCmap = ttf.GetUnicodeCmapLookup();
// always copy GID 0
glyphIds.Add(0);
}
/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @ If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
version = data.Read32Fixed();
defaultVertOriginY = data.ReadSignedShort();
int numVertOriginYMetrics = data.ReadUnsignedShort();
origins = new Dictionary <int, int>(numVertOriginYMetrics);
for (int i = 0; i < numVertOriginYMetrics; ++i)
{
int g = data.ReadUnsignedShort();
int y = data.ReadSignedShort();
origins[g] = y;
}
initialized = true;
}
/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @ If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
HorizontalHeaderTable hHeader = ttf.HorizontalHeader;
if (hHeader == null)
{
throw new IOException("Could not get hhea table");
}
numHMetrics = hHeader.NumberOfHMetrics;
int numGlyphs = ttf.NumberOfGlyphs;
int bytesRead = 0;
advanceWidth = new int[numHMetrics];
leftSideBearing = new short[numHMetrics];
for (int i = 0; i < numHMetrics; i++)
{
advanceWidth[i] = data.ReadUnsignedShort();
leftSideBearing[i] = data.ReadSignedShort();
bytesRead += 4;
}
int numberNonHorizontal = numGlyphs - numHMetrics;
// handle bad fonts with too many hmetrics
if (numberNonHorizontal < 0)
{
numberNonHorizontal = numGlyphs;
}
// make sure that table is never null and correct size, even with bad fonts that have no
// "leftSideBearing" table although they should
nonHorizontalLeftSideBearing = new short[numberNonHorizontal];
if (bytesRead < Length)
{
for (int i = 0; i < numberNonHorizontal; i++)
{
if (bytesRead < Length)
{
nonHorizontalLeftSideBearing[i] = data.ReadSignedShort();
bytesRead += 2;
}
}
}
initialized = true;
}
/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @ If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
VerticalHeaderTable vHeader = ttf.VerticalHeader;
if (vHeader == null)
{
throw new IOException("Could not get vhea table");
}
numVMetrics = vHeader.NumberOfVMetrics;
int numGlyphs = ttf.NumberOfGlyphs;
int bytesRead = 0;
advanceHeight = new int[numVMetrics];
topSideBearing = new short[numVMetrics];
for (int i = 0; i < numVMetrics; i++)
{
advanceHeight[i] = data.ReadUnsignedShort();
topSideBearing[i] = data.ReadSignedShort();
bytesRead += 4;
}
if (bytesRead < Length)
{
int numberNonVertical = numGlyphs - numVMetrics;
// handle bad fonts with too many vmetrics
if (numberNonVertical < 0)
{
numberNonVertical = numGlyphs;
}
additionalTopSideBearing = new short[numberNonVertical];
for (int i = 0; i < numberNonVertical; i++)
{
if (bytesRead < Length)
{
additionalTopSideBearing[i] = data.ReadSignedShort();
bytesRead += 2;
}
}
}
initialized = true;
}
protected override TTFTable ReadTable(TrueTypeFont font, string tag)
{
// todo: this is a stub, a full implementation is needed
switch (tag)
{
case "BASE":
case "GDEF":
case "GPOS":
case "GSUB":
case "JSTF":
return(new OTLTable(font));
case "CFF ":
return(new CFFTable(font));
default:
return(base.ReadTable(font, tag));
}
}
/**
* Parse a file and get a true type font.
*
* @param raf The TTF file.
* @return A TrueType font.
* @ If there is an error parsing the TrueType font.
*/
public TrueTypeFont Parse(TTFDataStream raf, string fontName = null)
{
if (string.Equals(raf.ReadString(4), TrueTypeCollection.TAG, StringComparison.Ordinal))
{
raf.Seek(raf.CurrentPosition - 4);
TrueTypeCollection fontCollection = new TrueTypeCollection(raf);
var nameFont = fontCollection.GetFontByName(fontName);
if (nameFont == null)
{
nameFont = fontCollection.GetFontAtIndex(0);
}
return(nameFont);
}
raf.Seek(raf.CurrentPosition - 4);
TrueTypeFont font = NewFont(raf);
font.Version = raf.Read32Fixed();
int numberOfTables = raf.ReadUnsignedShort();
int searchRange = raf.ReadUnsignedShort();
int entrySelector = raf.ReadUnsignedShort();
int rangeShift = raf.ReadUnsignedShort();
for (int i = 0; i < numberOfTables; i++)
{
TTFTable table = ReadTableDirectory(font, raf);
// skip tables with zero length
if (table != null)
{
font.AddTable(table);
}
}
// parse tables if wanted
if (!parseOnDemandOnly)
{
ParseTables(font);
}
return(font);
}
/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @ If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
version = data.Read32Fixed();
fontRevision = data.Read32Fixed();
checkSumAdjustment = data.ReadUnsignedInt();
magicNumber = data.ReadUnsignedInt();
flags = data.ReadUnsignedShort();
unitsPerEm = data.ReadUnsignedShort();
created = data.ReadInternationalDate();
modified = data.ReadInternationalDate();
xMin = data.ReadSignedShort();
yMin = data.ReadSignedShort();
xMax = data.ReadSignedShort();
yMax = data.ReadSignedShort();
macStyle = data.ReadUnsignedShort();
lowestRecPPEM = data.ReadUnsignedShort();
fontDirectionHint = data.ReadSignedShort();
indexToLocFormat = data.ReadSignedShort();
glyphDataFormat = data.ReadSignedShort();
initialized = true;
}
/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @ If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
version = data.Read32Fixed();
ascender = data.ReadSignedShort();
descender = data.ReadSignedShort();
lineGap = data.ReadSignedShort();
advanceHeightMax = data.ReadUnsignedShort();
minTopSideBearing = data.ReadSignedShort();
minBottomSideBearing = data.ReadSignedShort();
yMaxExtent = data.ReadSignedShort();
caretSlopeRise = data.ReadSignedShort();
caretSlopeRun = data.ReadSignedShort();
caretOffset = data.ReadSignedShort();
reserved1 = data.ReadSignedShort();
reserved2 = data.ReadSignedShort();
reserved3 = data.ReadSignedShort();
reserved4 = data.ReadSignedShort();
metricDataFormat = data.ReadSignedShort();
numberOfVMetrics = data.ReadUnsignedShort();
initialized = true;
}
public IndexToLocationTable(TrueTypeFont font)
: base(font)
{
}
/**
* Parse all tables and check if all needed tables are present.
*
* @param font the TrueTypeFont instance holding the parsed data.
* @ If there is an error parsing the TrueType font.
*/
private void ParseTables(TrueTypeFont font)
{
foreach (TTFTable table in font.Tables)
{
if (!table.Initialized)
{
font.ReadTable(table);
}
}
bool isPostScript = AllowCFF && font.TableMap.ContainsKey(CFFTable.TAG);
HeaderTable head = font.Header;
if (head == null)
{
throw new IOException("head is mandatory");
}
HorizontalHeaderTable hh = font.HorizontalHeader;
if (hh == null)
{
throw new IOException("hhead is mandatory");
}
MaximumProfileTable maxp = font.MaximumProfile;
if (maxp == null)
{
throw new IOException("maxp is mandatory");
}
PostScriptTable post = font.PostScript;
if (post == null && !isEmbedded)
{
// in an embedded font this table is optional
throw new IOException("post is mandatory");
}
if (!isPostScript)
{
IndexToLocationTable loc = font.IndexToLocation;
if (loc == null)
{
throw new IOException("loca is mandatory");
}
if (font.Glyph == null)
{
throw new IOException("glyf is mandatory");
}
}
if (font.Naming == null && !isEmbedded)
{
throw new IOException("name is mandatory");
}
if (font.HorizontalMetrics == null)
{
throw new IOException("hmtx is mandatory");
}
if (!isEmbedded && font.Cmap == null)
{
throw new IOException("cmap is mandatory");
}
}
private TTFTable ReadTableDirectory(TrueTypeFont font, TTFDataStream raf)
{
TTFTable table;
string tag = raf.ReadString(4);
switch (tag)
{
case CmapTable.TAG:
table = new CmapTable(font);
break;
case GlyphTable.TAG:
table = new GlyphTable(font);
break;
case HeaderTable.TAG:
table = new HeaderTable(font);
break;
case HorizontalHeaderTable.TAG:
table = new HorizontalHeaderTable(font);
break;
case HorizontalMetricsTable.TAG:
table = new HorizontalMetricsTable(font);
break;
case IndexToLocationTable.TAG:
table = new IndexToLocationTable(font);
break;
case MaximumProfileTable.TAG:
table = new MaximumProfileTable(font);
break;
case NamingTable.TAG:
table = new NamingTable(font);
break;
case OS2WindowsMetricsTable.TAG:
table = new OS2WindowsMetricsTable(font);
break;
case PostScriptTable.TAG:
table = new PostScriptTable(font);
break;
case DigitalSignatureTable.TAG:
table = new DigitalSignatureTable(font);
break;
case KerningTable.TAG:
table = new KerningTable(font);
break;
case VerticalHeaderTable.TAG:
table = new VerticalHeaderTable(font);
break;
case VerticalMetricsTable.TAG:
table = new VerticalMetricsTable(font);
break;
case VerticalOriginTable.TAG:
table = new VerticalOriginTable(font);
break;
case GlyphSubstitutionTable.TAG:
table = new GlyphSubstitutionTable(font);
break;
default:
table = ReadTable(font, tag);
break;
}
table.Tag = tag;
table.CheckSum = raf.ReadUnsignedInt();
table.Offset = raf.ReadUnsignedInt();
table.Length = raf.ReadUnsignedInt();
// skip tables with zero length (except glyf)
if (table.Length == 0 && !tag.Equals(GlyphTable.TAG, StringComparison.Ordinal))
{
return(null);
}
return(table);
}
public VerticalOriginTable(TrueTypeFont font)
: base(font)
{
}
protected virtual TTFTable ReadTable(TrueTypeFont font, string tag)
{
// unknown table type but read it anyway.
return(new TTFTable(font));
}
/**
* Creates a subsetter for the given font.
*
* @param ttf the font to be subset
*/
public TTFSubsetter(TrueTypeFont ttf)
: this(ttf, null)
{
}
public VerticalMetricsTable(TrueTypeFont font)
: base(font)
{
}
public OS2WindowsMetricsTable(TrueTypeFont font) : base(font)
{
}
public KerningTable(TrueTypeFont font) : base(font)
{
}
public GlyphSubstitutionTable(TrueTypeFont font) : base(font)
{
}
/**
* Constructor.
*
* @param font The font which contains this table.
*/
public TTFTable(TrueTypeFont font)
{
this.font = font;
}
public GlyphTable(TrueTypeFont font) : base(font)
{
}
public PostScriptTable(TrueTypeFont font)
: base(font)
{
}
public HeaderTable(TrueTypeFont font) : base(font)
{
}
public HorizontalMetricsTable(TrueTypeFont font) : base(font)
{
}
/**
* This will read the required data from the stream.
*
* @param ttf The font that is being read.
* @param data The stream to read the data from.
* @ If there is an error reading the data.
*/
public override void Read(TrueTypeFont ttf, TTFDataStream data)
{
formatType = data.Read32Fixed();
italicAngle = data.Read32Fixed();
underlinePosition = data.ReadSignedShort();
underlineThickness = data.ReadSignedShort();
isFixedPitch = data.ReadUnsignedInt();
minMemType42 = data.ReadUnsignedInt();
maxMemType42 = data.ReadUnsignedInt();
mimMemType1 = data.ReadUnsignedInt();
maxMemType1 = data.ReadUnsignedInt();
if (formatType.CompareTo(1.0f) == 0)
{
/*
* This TrueType font file contains exactly the 258 glyphs in the standard Macintosh TrueType.
*/
glyphNames = new string[WGL4Names.NUMBER_OF_MAC_GLYPHS];
Array.Copy(WGL4Names.MAC_GLYPH_NAMES, 0, glyphNames, 0, WGL4Names.NUMBER_OF_MAC_GLYPHS);
}
else if (formatType.CompareTo(2.0f) == 0)
{
int numGlyphs = data.ReadUnsignedShort();
int[] glyphNameIndex = new int[numGlyphs];
glyphNames = new string[numGlyphs];
int maxIndex = int.MinValue;
for (int i = 0; i < numGlyphs; i++)
{
int index = data.ReadUnsignedShort();
glyphNameIndex[i] = index;
// PDFBOX-808: Index numbers between 32768 and 65535 are
// reserved for future use, so we should just ignore them
if (index <= 32767)
{
maxIndex = Math.Max(maxIndex, index);
}
}
string[] nameArray = null;
if (maxIndex >= WGL4Names.NUMBER_OF_MAC_GLYPHS)
{
nameArray = new string[maxIndex - WGL4Names.NUMBER_OF_MAC_GLYPHS + 1];
for (int i = 0; i < maxIndex - WGL4Names.NUMBER_OF_MAC_GLYPHS + 1; i++)
{
int numberOfChars = data.ReadUnsignedByte();
nameArray[i] = data.ReadString(numberOfChars);
}
}
for (int i = 0; i < numGlyphs; i++)
{
int index = glyphNameIndex[i];
if (index >= 0 && index < WGL4Names.NUMBER_OF_MAC_GLYPHS)
{
glyphNames[i] = WGL4Names.MAC_GLYPH_NAMES[index];
}
else if (index >= WGL4Names.NUMBER_OF_MAC_GLYPHS && index <= 32767 && nameArray != null)
{
glyphNames[i] = nameArray[index - WGL4Names.NUMBER_OF_MAC_GLYPHS];
}
else
{
// PDFBOX-808: Index numbers between 32768 and 65535 are
// reserved for future use, so we should just ignore them
glyphNames[i] = ".undefined";
}
}
}
else if (formatType.CompareTo(2.5f) == 0)
{
int[] glyphNameIndex = new int[ttf.NumberOfGlyphs];
for (int i = 0; i < glyphNameIndex.Length; i++)
{
int offset = data.ReadSignedByte();
glyphNameIndex[i] = i + 1 + offset;
}
glyphNames = new string[glyphNameIndex.Length];
for (int i = 0; i < glyphNames.Length; i++)
{
int index = glyphNameIndex[i];
if (index >= 0 && index < WGL4Names.NUMBER_OF_MAC_GLYPHS)
{
string name = WGL4Names.MAC_GLYPH_NAMES[index];
if (name != null)
{
glyphNames[i] = name;
}
}
else
{
Debug.WriteLine($"debug: incorrect glyph name index {index}, valid numbers 0..{WGL4Names.NUMBER_OF_MAC_GLYPHS}");
}
}
}
else if (formatType.CompareTo(3.0f) == 0)
{
// no postscript information is provided.
Debug.WriteLine($"debug: No PostScript name information is provided for the font {font.Name}");
}
initialized = true;
}
public VerticalHeaderTable(TrueTypeFont font)
: base(font)
{
}