public static void Load(FontParser parser, int offset, FontFace font, Glyph[] glyphs, int numMetrics)
{
// Seek there:
parser.Position = offset;
// Get the glyph length:
int numGlyphs = glyphs.Length;
ushort advanceWidth = 0;
short leftSideBearing = 0;
// For each one..
for (int i = 0; i < numGlyphs; i++)
{
// Monospaced fonts only have one entry:
if (i < numMetrics)
{
advanceWidth = parser.ReadUInt16();
leftSideBearing = parser.ReadInt16();
}
Glyph glyph = glyphs[i];
glyph.AdvanceWidth = (float)advanceWidth / font.UnitsPerEmF;
glyph.LeftSideBearing = (float)leftSideBearing / font.UnitsPerEmF;
}
}
public CffGlyphParser(FontParser parser, FontFace font)
{
Font = font;
Parser = parser;
ScaleRatio = 1f / font.UnitsPerEmF;
Stack = new CffStack();
}
/// <summary>Called when all glyphs in this font face have been loaded up.
/// Note that this may occur very late or, more likely never, when glyphs are loaded on demand.</summary>
public void AllGlyphsLoaded()
{
CffParser = null;
Parser = null;
UnloadedGlyphs = 0;
ParserGlyphs = null;
}
public CffGlyphParser(FontParser parser,FontFace font){
Font=font;
Parser=parser;
ScaleRatio=1f/font.UnitsPerEmF;
Stack=new CffStack();
}
public static void Load(FontParser parser,int offset,FontFace font,Glyph[] glyphs,int numMetrics){
// Seek there:
parser.Position=offset;
// Get the glyph length:
int numGlyphs=glyphs.Length;
ushort advanceWidth=0;
short leftSideBearing=0;
// For each one..
for (int i=0;i<numGlyphs;i++){
// Monospaced fonts only have one entry:
if (i<numMetrics){
advanceWidth=parser.ReadUInt16();
leftSideBearing=parser.ReadInt16();
}
Glyph glyph=glyphs[i];
glyph.AdvanceWidth=(float)advanceWidth/font.UnitsPerEmF;
glyph.LeftSideBearing=(float)leftSideBearing/font.UnitsPerEmF;
}
}
/// <summary>Used when delaying the loading of a glyph. This results in rapid startup.</summary>
public static void LoadFully(Glyph glyph,FontParser parser,LoadMetaPoint meta){
parser.Position=meta.Start;
LoadGlyph(glyph,meta.Length,parser,glyph.Font.UnitsPerEmF);
}
public static int LoadGlyphCoordinate(FontParser parser, byte flag, int previousValue, int shortVectorBitMask, int sameBitMask)
{
int v;
if ((flag & shortVectorBitMask) > 0)
{
// The coordinate is 1 byte long.
v = parser.ReadByte();
// The "same" bit is re-used for short values to signify the sign of the value.
if ((flag & sameBitMask) == 0)
{
v = -v;
}
v = previousValue + v;
}
else
{
// The coordinate is 2 bytes long.
// If the same bit is set, the coordinate is the same as the previous coordinate.
if ((flag & sameBitMask) > 0)
{
v = previousValue;
}
else
{
// Parse the coordinate as a signed 16-bit delta value.
v = previousValue + parser.ReadInt16();
}
}
return(v);
}
public static uint[] Load(FontParser parser,int offset,int numGlyphs,bool shortVersion){
// Seek there now:
parser.Position=offset;
// Extra entry is used for computing the length of the last glyph, thus +1.
int length=numGlyphs+1;
// Create the output set:
uint[] locations=new uint[length];
// For each one..
for(int i=0;i<length;i++){
if(shortVersion){
locations[i]=(uint)(parser.ReadUInt16()*2);
}else{
locations[i]=parser.ReadUInt32();
}
}
return locations;
}
public static uint[] Load(FontParser parser, int offset, int numGlyphs, bool shortVersion)
{
// Seek there now:
parser.Position = offset;
// Extra entry is used for computing the length of the last glyph, thus +1.
int length = numGlyphs + 1;
// Create the output set:
uint[] locations = new uint[length];
// For each one..
for (int i = 0; i < length; i++)
{
if (shortVersion)
{
locations[i] = (uint)(parser.ReadUInt16() * 2);
}
else
{
locations[i] = parser.ReadUInt32();
}
}
return(locations);
}
public static void Load(FontParser parser, int offset, FontFace font, out int hmMetricCount)
{
// Seek there:
parser.Position = offset;
// Version:
parser.ReadVersion();
// Ascender:
float ascender = (float)parser.ReadInt16() / font.UnitsPerEmF;
// Descender:
float descender = (float)parser.ReadInt16() / font.UnitsPerEmF;
// Line gap:
float lineGap = (float)parser.ReadInt16() / font.UnitsPerEmF;
if (lineGap < 0f)
{
// Negative line gaps are treated as meaning 0.
lineGap = 0f;
}
parser.HheaAscender = ascender;
parser.HheaDescender = descender;
parser.HheaLineGap = lineGap;
// Advance width max:
font.MaxAdvanceWidth = (float)parser.ReadUInt16() / font.UnitsPerEmF;
// Min left side bearing:
font.MinLeftSideBearing = (float)parser.ReadInt16() / font.UnitsPerEmF;
// Min right side bearing:
font.MinRightSideBearing = (float)parser.ReadInt16() / font.UnitsPerEmF;
// Max x extent:
font.MaxXExtent = (float)parser.ReadInt16() / font.UnitsPerEmF;
// Caret slope rise:
float caretRise = (float)parser.ReadInt16();
// Caret slope run:
float caretRun = (float)parser.ReadInt16();
font.CaretAngle = (float)Math.Atan2(caretRise, caretRun);
// Caret offset:
font.CaretOffset = (float)parser.ReadInt16() / font.UnitsPerEmF;
// Skip:
parser.Position += 8;
// Metric format:
parser.ReadInt16();
// Metric count:
hmMetricCount = parser.ReadUInt16();
}
public static void Load(FontParser parser,int offset,FontFace font,out int glyphCount){
// Seek:
parser.Position=offset;
// Table version:
float version=parser.ReadVersion();
// Glyph count:
glyphCount=parser.ReadUInt16();
if (version == 1f){
// Max points:
parser.ReadUInt16();
// Max contours:
parser.ReadUInt16();
// Max composite points:
parser.ReadUInt16();
// Max composite contours:
parser.ReadUInt16();
// Max zones:
parser.ReadUInt16();
// Max twilight points:
parser.ReadUInt16();
// Max storage:
parser.ReadUInt16();
// Max function defs:
parser.ReadUInt16();
// Max instruction defs:
parser.ReadUInt16();
// Max stack elements:
parser.ReadUInt16();
// Max instruction size:
parser.ReadUInt16();
// Max component elements:
parser.ReadUInt16();
// Max component depth:
parser.ReadUInt16();
}
}
private static Glyph[] LoadIndex(FontParser parser,CffGlyphParser cffParser){
// Read the index which contains a bunch of char strings.
// Each charstring is a postscript glyph definition.
// How many are in here?
int count=parser.ReadUInt16();
if(count==0){
return null;
}
// Create the offset set:
int[] offsets=new int[count+1];
// Read the offset size:
int offsetSize=parser.ReadByte();
// Read each offset:
for(int i=0;i<=count;i++){
// Read the current offset:
offsets[i]=parser.ReadOffset(offsetSize);
}
// Grab the object offset, minus one as their not zero based:
int objectOffset=parser.Position-1;
// Create the glyph set:
Glyph[] glyphs=new Glyph[offsets.Length-1];
// For each one..
for(int i=0;i<glyphs.Length;i++){
// Get the (relative) indices:
int startIndex=offsets[i];
int length=offsets[i+1]-startIndex;
// Load the glyph now, which starts at startIndex+objectOffset:
Glyph glyph=cffParser.LoadGlyph(startIndex+objectOffset,length);
// Add to the set:
glyphs[i]=glyph;
}
// Seek over the table:
parser.Position=objectOffset+offsets[count];
return glyphs;
}
public static void Load(FontParser parser, int offset, FontFace font, out int glyphCount)
{
// Seek:
parser.Position = offset;
// Table version:
float version = parser.ReadVersion();
// Glyph count:
glyphCount = parser.ReadUInt16();
if (version == 1f)
{
// Max points:
parser.ReadUInt16();
// Max contours:
parser.ReadUInt16();
// Max composite points:
parser.ReadUInt16();
// Max composite contours:
parser.ReadUInt16();
// Max zones:
parser.ReadUInt16();
// Max twilight points:
parser.ReadUInt16();
// Max storage:
parser.ReadUInt16();
// Max function defs:
parser.ReadUInt16();
// Max instruction defs:
parser.ReadUInt16();
// Max stack elements:
parser.ReadUInt16();
// Max instruction size:
parser.ReadUInt16();
// Max component elements:
parser.ReadUInt16();
// Max component depth:
parser.ReadUInt16();
}
}
public static void Load(FontParser parser, int offset, FontFace font, Glyph[] glyphs)
{
// Seek:
parser.Position = offset;
// Check table version - 0 is current:
if (parser.ReadUInt16() != 0)
{
return;
}
// Skip ntables:
parser.Position += 2;
// Sub-table version - 0 is current:
if (parser.ReadUInt16() != 0)
{
return;
}
// Skip subTableLength, subTableCoverage:
parser.Position += 4;
// How many pairs?
int pairCount = parser.ReadUInt16();
// Skip searchRange, entrySelector, rangeShift.
parser.Position += 6;
float scaleFactor = 1f / font.UnitsPerEmF;
for (int i = 0; i < pairCount; i++)
{
// Get the glyph indices:
int leftIndex = parser.ReadUInt16();
int rightIndex = parser.ReadUInt16();
// Get the kerning value:
short value = parser.ReadInt16();
// Push:
Glyph right = glyphs[rightIndex];
Glyph left = glyphs[leftIndex];
if (right == null || left == null)
{
continue;
}
right.AddKerningPair(left, (float)value * scaleFactor);
}
}
private static Glyph[] LoadIndex(FontParser parser, CffGlyphParser cffParser)
{
// Read the index which contains a bunch of char strings.
// Each charstring is a postscript glyph definition.
// How many are in here?
int count = parser.ReadUInt16();
if (count == 0)
{
return(null);
}
// Create the offset set:
int[] offsets = new int[count + 1];
// Read the offset size:
int offsetSize = parser.ReadByte();
// Read each offset:
for (int i = 0; i <= count; i++)
{
// Read the current offset:
offsets[i] = parser.ReadOffset(offsetSize);
}
// Grab the object offset, minus one as their not zero based:
int objectOffset = parser.Position - 1;
// Create the glyph set:
Glyph[] glyphs = new Glyph[offsets.Length - 1];
// For each one..
for (int i = 0; i < glyphs.Length; i++)
{
// Get the (relative) indices:
int startIndex = offsets[i];
int length = offsets[i + 1] - startIndex;
// Load the glyph now, which starts at startIndex+objectOffset:
Glyph glyph = cffParser.LoadGlyph(startIndex + objectOffset, length);
// Add to the set:
glyphs[i] = glyph;
}
// Seek over the table:
parser.Position = objectOffset + offsets[count];
return(glyphs);
}
public static Glyph[] Load(FontParser parser,int start,uint[] locations,FontFace font){
// Get the vertical range of the font - it's the em size.
float range=font.UnitsPerEmF;
// The number of glyphs (last location is just used for computation purposes).
int glyphCount=locations.Length-1;
Glyph[] glyphs=new Glyph[glyphCount];
font.ParserGlyphs=glyphs;
// For each glyph..
for(int i=0;i<glyphCount;i++){
uint offset=locations[i];
uint nextOffset=locations[i+1];
if(offset!=nextOffset){
// Seek there now:
parser.Position=start+(int)offset;
// Load it:
glyphs[i]=ParseGlyph(parser,font,range);
}else{
glyphs[i]=new Glyph(font);
}
}
if(Fonts.Preload){
// Composite glyphs next.
for(int i=0;i<glyphCount;i++){
Glyph glyph=glyphs[i];
if(glyph!=null){
glyph.LoadFully(glyphs);
}
}
}
return glyphs;
}
public static void Load(FontParser parser,int offset,FontFace font,Glyph[] glyphs){
// Seek:
parser.Position=offset;
// Check table version - 0 is current:
if(parser.ReadUInt16()!=0){
return;
}
// Skip ntables:
parser.Position+=2;
// Sub-table version - 0 is current:
if(parser.ReadUInt16()!=0){
return;
}
// Skip subTableLength, subTableCoverage:
parser.Position+=4;
// How many pairs?
int pairCount=parser.ReadUInt16();
// Skip searchRange, entrySelector, rangeShift.
parser.Position+=6;
float scaleFactor=1f/font.UnitsPerEmF;
for(int i=0;i<pairCount;i++){
// Get the glyph indices:
int leftIndex=parser.ReadUInt16();
int rightIndex=parser.ReadUInt16();
// Get the kerning value:
short value=parser.ReadInt16();
// Push:
Glyph right=glyphs[rightIndex];
Glyph left=glyphs[leftIndex];
if(right==null || left==null){
continue;
}
right.AddKerningPair(left,(float)value * scaleFactor);
}
}
public static FontFace Load(FontParser parser)
{
// Create the font:
FontFace font = new FontFace();
if (Load(parser, font, true))
{
return(font);
}
else
{
return(null);
}
}
private static CffSubPosition[] LoadSubIndex(FontParser parser){
// How many are in here?
int count=parser.ReadUInt16();
if(count==0){
return null;
}
// Create the offset set:
int[] offsets=new int[count+1];
// Read the offset size:
int offsetSize=parser.ReadByte();
// Read each offset:
for(int i=0;i<=count;i++){
// Read the current offset:
offsets[i]=parser.ReadOffset(offsetSize);
}
// Minus one as their not zero based:
int objectOffset=parser.Position-1;
// Seek over the table:
parser.Position=objectOffset+offsets[count];
// Create the result set:
CffSubPosition[] results=new CffSubPosition[offsets.Length-1];
// For each one..
for(int i=0;i<results.Length;i++){
// Get the (relative) indices:
int startIndex=offsets[i];
int length=offsets[i+1]-startIndex;
// Load the glyph now, which starts at startIndex+objectOffset:
results[i]=new CffSubPosition(startIndex+objectOffset,length);
}
return results;
}
public static int ParseOperand(FontParser parser, int b0)
{
if (b0 == 28)
{
return(parser.ReadInt16());
}
if (b0 == 29)
{
return(parser.ReadInt32());
}
if (b0 == 30)
{
// A floating point value which we really don't need - skipping!
while (true)
{
byte b = parser.ReadByte();
int n1 = b >> 4;
int n2 = b & 15;
if (n1 == 15 || n2 == 15)
{
break;
}
}
return(0);
}
if (b0 >= 32 && b0 <= 246)
{
return(b0 - 139);
}
if (b0 >= 247 && b0 <= 250)
{
return((b0 - 247) * 256 + parser.ReadByte() + 108);
}
if (b0 >= 251 && b0 <= 254)
{
return(-(b0 - 251) * 256 - parser.ReadByte() - 108);
}
return(0);
}
public override void Load(FontParser parser, ushort fmt, int start)
{
if (fmt == 1)
{
ReadCoverage(parser, start);
DeltaGlyphId = parser.ReadUInt16();
}
else if (fmt == 2)
{
ReadCoverage(parser, start);
}
else
{
Fail(fmt);
}
}
public static Glyph[] Load(FontParser parser, int start, uint[] locations, FontFace font)
{
// Get the vertical range of the font - it's the em size.
float range = font.UnitsPerEmF;
// The number of glyphs (last location is just used for computation purposes).
int glyphCount = locations.Length - 1;
Glyph[] glyphs = new Glyph[glyphCount];
font.ParserGlyphs = glyphs;
// For each glyph..
for (int i = 0; i < glyphCount; i++)
{
uint offset = locations[i];
uint nextOffset = locations[i + 1];
if (offset != nextOffset)
{
// Seek there now:
parser.Position = start + (int)offset;
// Load it:
glyphs[i] = ParseGlyph(parser, font, range);
}
else
{
glyphs[i] = new Glyph(font);
}
}
if (Fonts.Preload)
{
// Composite glyphs next.
for (int i = 0; i < glyphCount; i++)
{
Glyph glyph = glyphs[i];
if (glyph != null)
{
glyph.LoadFully(glyphs);
}
}
}
return(glyphs);
}
/// <summary>Creates a fontface from the given data. Only actually loads it on first glyph request.</summary>
public static FontFace DeferredLoad(byte[] data)
{
// Create the parser:
FontParser parser = new FontParser(data);
// Create the font:
FontFace font = new FontFace();
if (Load(parser, font, false))
{
return(font);
}
else
{
return(null);
}
}
private static CffSubPosition[] LoadSubIndex(FontParser parser)
{
// How many are in here?
int count = parser.ReadUInt16();
if (count == 0)
{
return(null);
}
// Create the offset set:
int[] offsets = new int[count + 1];
// Read the offset size:
int offsetSize = parser.ReadByte();
// Read each offset:
for (int i = 0; i <= count; i++)
{
// Read the current offset:
offsets[i] = parser.ReadOffset(offsetSize);
}
// Minus one as their not zero based:
int objectOffset = parser.Position - 1;
// Seek over the table:
parser.Position = objectOffset + offsets[count];
// Create the result set:
CffSubPosition[] results = new CffSubPosition[offsets.Length - 1];
// For each one..
for (int i = 0; i < results.Length; i++)
{
// Get the (relative) indices:
int startIndex = offsets[i];
int length = offsets[i + 1] - startIndex;
// Load the glyph now, which starts at startIndex+objectOffset:
results[i] = new CffSubPosition(startIndex + objectOffset, length);
}
return(results);
}
public static Dictionary <int, List <int> > ParseCFFDict(FontParser parser, int length)
{
// Create the results set:
Dictionary <int, List <int> > results = new Dictionary <int, List <int> >();
// Our first values set:
List <int> values = new List <int>();
// Note that rather awkwardly the key comes *after* the set of values.
int max = parser.Position + length;
// While there's more data..
while (parser.Position < max)
{
// Read the state byte:
int state = parser.ReadByte();
if (state < 22)
{
if (state == 12)
{
// 2 byte key code.
state = 1200 + parser.ReadByte();
}
// Push values:
results[state] = values;
// Clear:
values = new List <int>();
}
else
{
// Read the operand:
int operand = ParseOperand(parser, state);
// Push:
values.Add(operand);
}
}
return(results);
}
public static void Load(FontParser parser,int offset,FontFace font,Glyph[] glyphs){
// Seek:
parser.Position=offset;
//float scaleFactor=1f/font.UnitsPerEmF;
// Look for kerning data.
/*Glyph right=glyphs[rightIndex];
Glyph left=glyphs[leftIndex];
if(right==null || left==null){
continue;
}
right.AddKerningPair(left,(float)value * scaleFactor);
*/
}
private static Dictionary <int, List <int> > LoadDict(FontParser parser)
{
// How many are in here?
int count = parser.ReadUInt16();
if (count == 0)
{
return(null);
}
// Read the offset size:
int offsetSize = parser.ReadByte();
// Grab the position:
int position = parser.Position;
// Find where the data starts:
int objectOffset = position + ((count + 1) * offsetSize) - 1;
// Read two only:
int firstOffset = parser.ReadOffset(offsetSize);
int secondOffset = parser.ReadOffset(offsetSize);
// Seek to the location:
parser.Position = firstOffset + objectOffset;
// Parse the dictionary now:
Dictionary <int, List <int> > set = ParseCFFDict(parser, secondOffset - firstOffset);
// Return:
parser.Position = position;
// Skip the rest:
parser.Position += offsetSize * count;
// Read the last offset:
secondOffset = parser.ReadOffset(offsetSize);
// Seek there, minus one as their not zero based:
parser.Position += secondOffset - 1;
return(set);
}
public static void Load(FontParser parser, int offset, FontFace font, Glyph[] glyphs)
{
// Seek:
parser.Position = offset;
//float scaleFactor=1f/font.UnitsPerEmF;
// Look for kerning data.
/*Glyph right=glyphs[rightIndex];
* Glyph left=glyphs[leftIndex];
*
* if(right==null || left==null){
* continue;
* }
*
* right.AddKerningPair(left,(float)value * scaleFactor);
*/
}
public void Load(FontParser parser)
{
// Format:
int format = parser.ReadUInt16();
switch (format)
{
case 1:
break;
case 2:
break;
}
}
private static void SkipIndex(FontParser parser)
{
// How many are in here?
int count = parser.ReadUInt16();
if (count > 0)
{
// Read the offset size:
int offsetSize = parser.ReadByte();
// Skip count offsets:
parser.Position += offsetSize * count;
// Read the last offset:
int lastOffset = parser.ReadOffset(offsetSize);
// Seek there, minus one as their not zero based:
parser.Position += lastOffset - 1;
}
}
public void Load(FontParser parser){
int start=parser.Position;
// Table type:
parser.ReadUInt16();
parser.ReadUInt16();
int count=parser.ReadUInt16();
// create the set:
Substitutions=new Dictionary<int,List<LigatureSubstitution>>();
// For each one..
for(int i=0;i<count;i++){
// Get the offset:
int offset=parser.ReadUInt16();
// Create the substitution entry:
LigatureSubstitution substitution=new LigatureSubstitution();
// Get the current position:
int position=parser.Position;
// Hop there:
parser.Position=start+offset;
// Load it:
substitution.Load(parser);
// Go back:
parser.Position=position;
}
// Extra flags:
parser.ReadUInt16();
}
/// <summary>Adds a ligature table to the font.</summary>
public static void AddToFont(string name, FontParser parser, int tableOffset, FontFace font, LigatureLookupTable[] tables)
{
int position = parser.Position;
// Skip params (+2):
parser.Position = tableOffset + 2;
// Index count:
int count = parser.ReadUInt16();
// For each one..
for (int i = 0; i < count; i++)
{
// Grab the index:
//int index=parser.ReadUInt16();
// Grab the table:
//LigatureLookupTable table=tables[index];
}
parser.Position = position;
}
public void Load(FontParser parser)
{
int start = parser.Position;
// Table type:
parser.ReadUInt16();
parser.ReadUInt16();
int count = parser.ReadUInt16();
// create the set:
Substitutions = new Dictionary <int, List <LigatureSubstitution> >();
// For each one..
for (int i = 0; i < count; i++)
{
// Get the offset:
int offset = parser.ReadUInt16();
// Create the substitution entry:
LigatureSubstitution substitution = new LigatureSubstitution();
// Get the current position:
int position = parser.Position;
// Hop there:
parser.Position = start + offset;
// Load it:
substitution.Load(parser);
// Go back:
parser.Position = position;
}
// Extra flags:
parser.ReadUInt16();
}
public void Load(FontParser parser){
// Format:
int format=parser.ReadUInt16();
switch(format){
case 1:
break;
case 2:
break;
}
}
public void ReadCoverage(FontParser parser, int start)
{
ushort offset = parser.ReadUInt16();
int pos = parser.Position;
// Go there:
parser.Position = offset + start;
/*
* ushort fmt=parser.ReadUInt16();
* ushort count=parser.ReadUInt16();
*
* if(fmt==1){
*
* for (int i = 0; i < count; i++) {
*
* // Just the glyphID:
* ushort glyphID=parser.ReadUInt16();
*
* }
*
* }else{
*
* for (int i = 0; i < count; i++) {
*
* ushort start=parser.ReadUInt16();
* ushort end=parser.ReadUInt16();
* ushort index=parser.ReadUInt16();
*
* }
*
* }
*/
// Restore:
parser.Position = pos;
}
/// <summary>Loads the WOFF header. Only useful thing from this for us is the number of tables.</summary>
public static void LoadHeader(int version, FontParser parser, out ushort numTables)
{
// - Woff header -
parser.Position += 4; // Flavour (uint)
parser.Position += 4; // Length (uint)
numTables = parser.ReadUInt16();
parser.Position += 2; // Reserved (ushort)
parser.Position += 4; // Total size (uint)
if (version == 2) // It's a shame this was put above the actual declared version
{
parser.Position += 4; // Total compressed size (uint)
}
parser.Position += 2; // Version major (ushort)
parser.Position += 2; // Version minor (ushort)
parser.Position += 4; // meta Offset (uint)
parser.Position += 4; // meta Length (uint)
parser.Position += 4; // meta Orig Length (uint)
parser.Position += 4; // priv offset (uint)
parser.Position += 4; // priv Length (uint)
}
public static bool Load(FontParser parser,int offset,FontFace font,out int locFormatIndex){
// Seek there now:
parser.Position=offset;
// Version:
parser.ReadVersion();
// Revision:
parser.ReadRevision();
// Checksum adjustment:
parser.ReadUInt32();
// Magic number:
if(parser.ReadUInt32()!=0x5F0F3CF5){
locFormatIndex=0;
return false;
}
// Flags:
parser.ReadUInt16();
// Units per em:
font.UnitsPerEm = parser.ReadUInt16();
font.UnitsPerEmF = (float)font.UnitsPerEm;
// Skip created and modified:
parser.ReadTime();
parser.ReadTime();
// X min:
parser.ReadInt16();
// Y min:
parser.ReadInt16();
// X max:
parser.ReadInt16();
// Y max:
parser.ReadInt16();
// Mac style:
parser.ReadUInt16();
// Lowest Rec PPEM:
parser.ReadUInt16();
// Font direction hint:
parser.ReadInt16();
// Index for the loc format:
locFormatIndex = parser.ReadInt16(); // 50
// Glyph data format:
parser.ReadInt16();
return true;
}
public static int ParseOperand(FontParser parser,int b0){
if(b0==28){
return parser.ReadInt16();
}
if(b0==29){
return parser.ReadInt32();
}
if(b0==30){
// A floating point value which we really don't need - skipping!
while(true){
byte b=parser.ReadByte();
int n1 = b >> 4;
int n2 = b & 15;
if (n1 ==15 || n2==15) {
break;
}
}
return 0;
}
if (b0 >= 32 && b0 <= 246) {
return b0 - 139;
}
if (b0 >= 247 && b0 <= 250) {
return (b0 - 247) * 256 + parser.ReadByte() + 108;
}
if (b0 >= 251 && b0 <= 254) {
return -(b0 - 251) * 256 - parser.ReadByte() - 108;
}
return 0;
}
public LookupList(FontParser parser, int position)
{
Parser = parser;
Offset = position;
}
public static void Load(FontParser parser,int offset,FontFace font){
// Got OS2:
parser.ReadOS2=true;
// Seek:
parser.Position=offset;
// version
int version=parser.ReadUInt16();
// xAvgCharWidth
parser.ReadInt16();
// usWeightClass
int weight=parser.ReadUInt16();
// usWidthClass
parser.ReadUInt16();
// fsType
parser.ReadUInt16();
// ySubscriptXSize
parser.ReadInt16();
// ySubscriptYSize
parser.ReadInt16();
// ySubscriptXOffset
parser.ReadInt16();
// ySubscriptYOffset
parser.ReadInt16();
// ySuperscriptXSize
parser.ReadInt16();
// ySuperscriptYSize
parser.ReadInt16();
// ySuperscriptXOffset
parser.ReadInt16();
// ySuperscriptYOffset
parser.ReadInt16();
// yStrikeoutSize
font.StrikeSize=(float)parser.ReadInt16()/font.UnitsPerEmF;
// yStrikeoutPosition
font.StrikeOffset=(float)parser.ReadInt16()/font.UnitsPerEmF;
// sFamilyClass
parser.ReadInt16();
// panose:
/*
byte panose=new byte[10];
for(int i=0;i<10;i++){
panose[i]=parser.ReadByte();
}
*/
parser.Position+=10;
// ulUnicodeRange1
parser.ReadUInt32();
// ulUnicodeRange2
parser.ReadUInt32();
// ulUnicodeRange3
parser.ReadUInt32();
// ulUnicodeRange4
parser.ReadUInt32();
// achVendID
parser.ReadTag();
// fsSelection
int type=parser.ReadUInt16();
bool italic=((type&1)==1);
// bool strikeout=((type&16)==16);
// bool underscore=((type&2)==2);
bool oblique=((type&512)==512);
bool bold=((type&32)==32);
bool regular=((type&64)==64);
bool useTypo=((type&128)==128);
if(!bold || regular){
// Must be regular:
weight=400;
}else if(weight==0){
weight=700;
}
font.SetFlags(italic || oblique,weight);
// usFirstCharIndex
parser.ReadUInt16();
// usLastCharIndex
parser.ReadUInt16();
// sTypoAscender
float ascender=(float)parser.ReadInt16()/font.UnitsPerEmF;
// sTypoDescender
float descender=(float)parser.ReadInt16()/font.UnitsPerEmF;
// sTypoLineGap
float lineGap=((float)parser.ReadInt16()/font.UnitsPerEmF);
// usWinAscent
float wAscender=(float)parser.ReadUInt16()/font.UnitsPerEmF;
// usWinDescent
float wDescender=(float)parser.ReadUInt16()/font.UnitsPerEmF;
// This is an awkward spec hack due to most windows programs
// providing the wrong typo descender values.
if(Fonts.UseOS2Metrics){
if(useTypo){
float halfGap=lineGap/2f;
font.Ascender=ascender + halfGap;
font.Descender=halfGap-descender;
font.LineGap=font.Ascender + font.Descender;
}else{
font.Ascender=wAscender;
font.Descender=wDescender;
font.LineGap=font.Ascender + font.Descender;
}
}
if (version >= 1){
// ulCodePageRange1
parser.ReadUInt32();
// ulCodePageRange2
parser.ReadUInt32();
}
if (version >= 2){
// sxHeight
parser.ReadInt16();
// sCapHeight
parser.ReadInt16();
// usDefaultChar
parser.ReadUInt16();
// usBreakChar
parser.ReadUInt16();
// usMaxContent
parser.ReadUInt16();
}
}
public static void Load(FontParser parser,int offset,FontFace font){
// Seek there:
parser.Position=offset;
// Version:
parser.ReadVersion();
// Script list (directed by UI Language setting):
int scriptList=parser.ReadUInt16();
// Feature list:
int featList=parser.ReadUInt16();
// Lookup list:
int lookList=parser.ReadUInt16();
// Goto script list:
int objectOffset=scriptList+offset;
parser.Position=objectOffset;
/*
// How many language scripts?
int scriptCount=parser.ReadUInt16();
for(int i=0;i<scriptCount;i++){
// Read the script code:
string scrName=parser.ReadString(4);
// And it's offset:
int scriptOffset=parser.ReadUInt16()+objectOffset;
int retPosition=parser.Position;
// Seek and load it right away:
parser.Position=scriptOffset;
// What's the default lang?
int defaultLangOffset=parser.ReadUInt16();
// How many languages?
int langCount=parser.ReadUInt16();
for(int l=0;l<langCount;l++){
// Read the lang code:
string langName=parser.ReadString(4);
// And it's offset - points to list of features:
int langOffset=parser.ReadUInt16()+objectOffset;
}
parser.Position=retPosition;
}
*/
// Goto lookup list:
objectOffset=lookList+offset;
// Seek there:
parser.Position=objectOffset;
// Load each one:
int lookCount=parser.ReadUInt16();
// Create:
LigatureLookupTable[] lookupTables=new LigatureLookupTable[lookCount];
for(int i=0;i<lookCount;i++){
// Create the table:
LigatureLookupTable table=new LigatureLookupTable();
// Load it:
int tableOffset=parser.ReadUInt16();
// Cache the position:
int seekPos=parser.Position;
// Head over to the table:
parser.Position=objectOffset+tableOffset;
// Load it now:
table.Load(parser);
// Add to set:
lookupTables[i]=table;
// Restore position:
parser.Position=seekPos;
}
// Goto feature list:
objectOffset=featList+offset;
parser.Position=objectOffset;
// How many features? For now, "liga" is the main feature we're after here.
int featureCount=parser.ReadUInt16();
for(int i=0;i<featureCount;i++){
// Read the feature code:
string feature=parser.ReadString(4);
// Table offset:
int featTable=parser.ReadUInt16();
switch(feature){
case "locl":
case "liga":
AddToFont(feature,parser,featTable+objectOffset,font,lookupTables);
break;
}
}
}
public static int LoadGlyphCoordinate(FontParser parser,byte flag,int previousValue,int shortVectorBitMask,int sameBitMask){
int v;
if((flag&shortVectorBitMask)>0){
// The coordinate is 1 byte long.
v = parser.ReadByte();
// The "same" bit is re-used for short values to signify the sign of the value.
if ((flag & sameBitMask) == 0) {
v = -v;
}
v = previousValue + v;
} else {
// The coordinate is 2 bytes long.
// If the same bit is set, the coordinate is the same as the previous coordinate.
if ((flag & sameBitMask) > 0) {
v = previousValue;
} else {
// Parse the coordinate as a signed 16-bit delta value.
v = previousValue + parser.ReadInt16();
}
}
return v;
}
public static FontFace Load(byte[] data)
{
FontParser parser = new FontParser(data);
return(Load(parser));
}
public static bool ReadTables(FontParser parser, FontFace font)
{
int hmMetricCount = 0;
if (parser.HheaOffset != 0)
{
// Hhea table:
HheaTables.Load(parser, parser.HheaOffset, font, out hmMetricCount);
}
Glyph[] glyphs = null;
if (parser.GlyfOffset != 0 && parser.LocaOffset != 0)
{
bool shortVersion = (parser.IndexToLocFormat == 0);
// Load a loca table (temporary):
uint[] locaTable = LocaTables.Load(parser, parser.LocaOffset, parser.GlyphCount, shortVersion);
// Load the glyph set:
glyphs = GlyfTables.Load(parser, parser.GlyfOffset, locaTable, font);
HmtxTables.Load(parser, parser.HmtxOffset, font, glyphs, hmMetricCount);
}
else if (parser.CffOffset != 0)
{
if (parser.PostOffset != 0)
{
// Post table:
int postGlyphCount;
PostTables.Load(parser, parser.PostOffset, font, out postGlyphCount);
if (parser.GlyphCount == 0 && postGlyphCount != -1)
{
parser.GlyphCount = postGlyphCount;
}
}
// Load the CFF (PostScript glyph) table:
glyphs = CffTables.Load(parser, parser.CffOffset, font);
}
else
{
// Unrecognised/ bad font.
return(false);
}
if (parser.KernOffset != 0)
{
// Kerning table:
KerningTables.Load(parser, parser.KernOffset, font, glyphs);
}
else if (parser.GposOffset != 0)
{
// GPOS table (also kerning data):
GposTables.Load(parser, parser.GposOffset, font, glyphs);
}
// Finally, the character map:
if (parser.CmapOffset != 0)
{
// Load a charmap:
CharMapTables.Load(parser, parser.CmapOffset, font, glyphs);
}
if (Fonts.Preload)
{
font.AllGlyphsLoaded();
}
return(true);
}
private static void LoadGlyph(Glyph glyph,int contourCount,FontParser parser,float range){
// The contour count (tiny set):
ushort[] endPointIndices=new ushort[contourCount];
// Load each endpoint:
for(int i=0;i<contourCount;i++){
endPointIndices[i]=parser.ReadUInt16();
}
// How big is the instruction block?
int instructionLength=parser.ReadUInt16();
// And skip it!
parser.Position+=instructionLength;
// How many coordinates?
int numberOfCoordinates=endPointIndices[endPointIndices.Length-1]+1;
// Create the flag set:
byte[] flags=new byte[numberOfCoordinates];
// For each one..
for (int i = 0; i < numberOfCoordinates;i++) {
byte flag=parser.ReadByte();
flags[i]=flag;
// If bit 3 is set, we repeat this flag n times, where n is the next byte.
if((flag&8)>0){
int repeatCount = parser.ReadByte();
for (int j = 0; j < repeatCount; j += 1) {
i++;
flags[i]=flag;
}
}
}
if (endPointIndices.Length > 0) {
// X/Y coordinates are relative to the previous point, except for the first point which is relative to 0,0.
if (numberOfCoordinates > 0){
// Current coord:
int coord=0;
// Coord index:
int coordIndex=0;
// The coord set:
float[] coords=new float[numberOfCoordinates*2];
// Load X coords:
for (int i = 0; i < numberOfCoordinates; i++) {
byte flag = flags[i];
coord = LoadGlyphCoordinate(parser,flag,coord,2,16);
coords[coordIndex]=(float)coord/range;
coordIndex+=2;
}
// Reset shared vars:
coord=0;
coordIndex=1;
// Load Y coords:
for (int i = 0; i < numberOfCoordinates; i++) {
byte flag = flags[i];
coord = LoadGlyphCoordinate(parser,flag,coord,4,32);
coords[coordIndex]=(float)coord/range;
coordIndex+=2;
}
int[] orderedEnds=new int[endPointIndices.Length];
int currentEnd=0;
for (int i = 0; i < numberOfCoordinates; i++) {
// Grab the flag:
byte flag=flags[i];
// On curve flag - Control point otherwise:
flag=(byte)(flag&1);
// Last point of the current contour?
// For each end point index (tiny set - better than hash):
for(int e=endPointIndices.Length-1;e>=0;e--){
if(endPointIndices[e]==i){
orderedEnds[currentEnd]=i;
currentEnd++;
break;
}
}
// Update the flag - it's now just a 1 or 0:
flags[i]=flag;
}
// Reset shared index again:
coordIndex=0;
// Create our temp holders of point info:
GlyphPoint firstPointRaw=new GlyphPoint(flags,coords);
GlyphPoint lastPointRaw=new GlyphPoint(flags,coords);
GlyphPoint prevPointRaw=new GlyphPoint(flags,coords);
GlyphPoint currentPointRaw=new GlyphPoint(flags,coords);
GlyphPoint controlPoint=new GlyphPoint(flags,coords);
// For each contour..
for(int i=0;i<contourCount;i++){
int pointOffset=0;
// Get the indices of the first/last points on this contour.
int firstIndex=0;
int lastIndex=orderedEnds[i];
if(i!=0){
firstIndex=orderedEnds[i-1]+1;
}
GlyphPoint firstPoint=firstPointRaw;
firstPoint.Set(firstIndex);
GlyphPoint lastPoint=lastPointRaw;
lastPoint.Set(lastIndex);
if(firstPoint.OnCurve){
// No control point:
controlPoint.Active=false;
// The first point will be consumed by the moveTo command so skip it:
pointOffset=1;
}else{
if(lastPoint.OnCurve){
// If the first point is off-curve and the last point is on-curve,
// start at the last point.
firstPoint=lastPoint;
}else{
// If both first and last points are off-curve, start at their middle.
firstPoint.X=(firstPoint.X+lastPoint.X)/2f;
firstPoint.Y=(firstPoint.Y+lastPoint.Y)/2f;
}
controlPoint.Set(firstPoint);
}
glyph.MoveTo(firstPoint.X,firstPoint.Y);
int contourStart=firstIndex+pointOffset;
for(int j=contourStart;j<=lastIndex;j++){
// Setup the previous point:
GlyphPoint prevPoint;
if(j==firstIndex){
prevPoint=firstPoint;
}else{
prevPoint=prevPointRaw;
prevPoint.Set(j-1);
}
// Setup the current point:
GlyphPoint pt=currentPointRaw;
pt.Set(j);
if(prevPoint.OnCurve && pt.OnCurve) {
// Just a line here:
glyph.LineTo(pt.X,pt.Y);
}else if (prevPoint.OnCurve && !pt.OnCurve){
controlPoint.Set(pt);
}else if(!prevPoint.OnCurve && !pt.OnCurve){
float midPointX=(prevPoint.X+pt.X)/2f;
float midPointY=(prevPoint.Y+pt.Y)/2f;
glyph.QuadraticCurveTo(prevPoint.X,prevPoint.Y,midPointX,midPointY);
controlPoint.Set(pt);
}else if(!prevPoint.OnCurve && pt.OnCurve){
// Previous point off-curve, this point on-curve.
glyph.QuadraticCurveTo(controlPoint.X,controlPoint.Y,pt.X,pt.Y);
controlPoint.Active=false;
}
}
if(firstPoint!=lastPoint){
// Close the path.
if(controlPoint.Active){
// Still got a spare control point:
glyph.QuadraticCurveTo(controlPoint.X,controlPoint.Y,firstPoint.X,firstPoint.Y);
}
// Just a normal close:
glyph.ClosePath();
}
}
}
}
if(glyph.Font.WindingUnknown){
// Find the winding now:
glyph.Font.FindWinding(glyph);
}
}
private static Dictionary<int,List<int>> LoadDict(FontParser parser){
// How many are in here?
int count=parser.ReadUInt16();
if(count==0){
return null;
}
// Read the offset size:
int offsetSize=parser.ReadByte();
// Grab the position:
int position=parser.Position;
// Find where the data starts:
int objectOffset=position+((count+1)*offsetSize)-1;
// Read two only:
int firstOffset=parser.ReadOffset(offsetSize);
int secondOffset=parser.ReadOffset(offsetSize);
// Seek to the location:
parser.Position=firstOffset+objectOffset;
// Parse the dictionary now:
Dictionary<int,List<int>> set=ParseCFFDict(parser,secondOffset-firstOffset);
// Return:
parser.Position=position;
// Skip the rest:
parser.Position+=offsetSize*count;
// Read the last offset:
secondOffset=parser.ReadOffset(offsetSize);
// Seek there, minus one as their not zero based:
parser.Position+=secondOffset-1;
return set;
}
public static Glyph[] Load(FontParser parser,int offset,FontFace font){
// Create the parser:
CffGlyphParser cffParser=new CffGlyphParser(parser,font);
cffParser.FullLoad=Fonts.Preload;
font.CffParser=cffParser;
// Seek, skipping the 4 byte header:
parser.Position=offset+4;
// Skip the name index:
SkipIndex(parser);
// Top dict index next (one entry only):
Dictionary<int,List<int>> topDict=LoadDict(parser);
// String index:
SkipIndex(parser);
// GSubr index:
cffParser.GSubrs=LoadSubIndex(parser);
// Figure out the bias:
cffParser.GsubrsBias=GetBias(cffParser.GSubrs);
// Read the private dict next - grab the info about where it is:
List<int> privateDictInfo=topDict[18];
// Get it's offset:
int privateDictOffset=offset+privateDictInfo[1];
// Seek there:
parser.Position=privateDictOffset;
// Load:
Dictionary<int,List<int>> privateDict=ParseCFFDict(parser,privateDictInfo[0]);
// Grab the default values:
cffParser.DefaultWidthX=(float)ReadDict(privateDict,20);
cffParser.NominalWidthX=(float)ReadDict(privateDict,21);
// Grab the subrs offset. May be zero (or non-existant):
int privateSubrs=ReadDict(privateDict,19);
if(privateSubrs!=0){
// We have a "subroutine" set. Get it's full offset and hop there:
parser.Position=privateDictOffset+privateSubrs;
// Load the set:
cffParser.Subrs=LoadSubIndex(parser);
// Figure out the bias/offset:
cffParser.SubrsBias=GetBias(cffParser.Subrs);
}
// Seek to the char string table:
parser.Position=offset+ReadDict(topDict,17);
// Time to actually load the actual glyphs, wohoo! O.O
return LoadIndex(parser,cffParser);
}
public static void Load(FontParser parser,int offset,FontFace font,out int hmMetricCount){
// Seek there:
parser.Position=offset;
// Version:
parser.ReadVersion();
// Ascender:
float ascender=(float)parser.ReadInt16()/font.UnitsPerEmF;
// Descender:
float descender=(float)parser.ReadInt16()/font.UnitsPerEmF;
// Line gap:
float lineGap=(float)parser.ReadInt16()/font.UnitsPerEmF;
if(!Fonts.UseOS2Metrics || !parser.ReadOS2){
if(lineGap<0f){
lineGap=-lineGap;
}
float halfGap=lineGap/2f;
font.Ascender=ascender + halfGap;
font.Descender=halfGap-descender;
font.LineGap=font.Ascender + font.Descender;
}
// Advance width max:
font.MaxAdvanceWidth=(float)parser.ReadUInt16()/font.UnitsPerEmF;
// Min left side bearing:
font.MinLeftSideBearing=(float)parser.ReadInt16()/font.UnitsPerEmF;
// Min right side bearing:
font.MinRightSideBearing=(float)parser.ReadInt16()/font.UnitsPerEmF;
// Max x extent:
font.MaxXExtent=(float)parser.ReadInt16()/font.UnitsPerEmF;
// Caret slope rise:
float caretRise=(float)parser.ReadInt16();
// Caret slope run:
float caretRun=(float)parser.ReadInt16();
font.CaretAngle=(float)Math.Atan2(caretRise,caretRun);
// Caret offset:
font.CaretOffset=(float)parser.ReadInt16()/font.UnitsPerEmF;
// Skip:
parser.Position += 8;
// Metric format:
parser.ReadInt16();
// Metric count:
hmMetricCount = parser.ReadUInt16();
}
public static bool Load(FontParser parser, FontFace font, bool full)
{
font.RequiresLoad = !full;
font.Parser = parser;
// Read the version:
int dec;
int version = parser.ReadFixed(out dec);
if (version == 1 && dec == 0)
{
// TTF outline format.
}
else
{
// Reset to start:
parser.Position = 0;
// OpenType. Read the tag (right at the start):
string openTypeVersion = parser.ReadTag();
if (openTypeVersion == "OTTO")
{
// CFF outline format.
}
else
{
// Unsupported format.
return(false);
}
}
// Table count:
int numTables = parser.ReadUInt16();
// Move to p12:
parser.Position = 12;
for (int i = 0; i < numTables; i++)
{
// Read the tables tag:
string tag = parser.ReadTag();
// Move parser along:
parser.Position += 4;
// Read the offset:
int offset = (int)parser.ReadUInt32();
// Grab the position - this allows the tables to mess it up:
int basePosition = parser.Position;
switch (tag)
{
case "cmap":
parser.CmapOffset = offset;
break;
case "head":
// Load the header:
if (!HeaderTables.Load(parser, offset, font, out parser.IndexToLocFormat))
{
return(false);
}
break;
case "hhea":
parser.HheaOffset = offset;
break;
case "hmtx":
parser.HmtxOffset = offset;
break;
case "maxp":
// Maxp table:
MaxpTables.Load(parser, offset, font, out parser.GlyphCount);
break;
case "name":
// General meta:
NameTables.Load(parser, offset, font);
break;
case "OS/2":
// OS2 table:
OS2Tables.Load(parser, offset, font);
break;
case "post":
// Postscript info table:
parser.PostOffset = offset;
break;
case "glyf":
parser.GlyfOffset = offset;
break;
case "loca":
parser.LocaOffset = offset;
break;
case "GSUB":
// Gsub(stitute) table. Ligatures fall through here.
GsubTables.Load(parser, offset, font);
break;
case "CFF ":
parser.CffOffset = offset;
break;
case "kern":
parser.KernOffset = offset;
break;
case "GPOS":
parser.GposOffset = offset;
break;
}
// Skip meta:
parser.Position = basePosition + 4;
}
if (full)
{
return(ReadTables(parser, font));
}
return(true);
}
public static Dictionary<string,string> Load(FontParser parser,int start,FontFace font){
// Create the map:
Dictionary<string,string> map=new Dictionary<string,string>();
// Go there now:
parser.Position=start;
// Format:
int format=parser.ReadUInt16();
// Number of names:
int count = parser.ReadUInt16();
// String offset:
int stringOffset = start + parser.ReadUInt16();
int unknownCount = 0;
for(int i=0;i<count;i++){
// Platform ID:
ushort platformID = parser.ReadUInt16();
ushort encodingID = parser.ReadUInt16();
ushort languageID = parser.ReadUInt16();
ushort nameID = parser.ReadUInt16();
string property = null;
if(nameID<PropertyMap.Length){
property=PropertyMap[nameID];
}
ushort byteLength = parser.ReadUInt16();
ushort offset = parser.ReadUInt16();
// platformID - encodingID - languageID standard combinations :
// 1 - 0 - 0 : Macintosh, Roman, English
// 3 - 1 - 0x409 : Windows, Unicode BMP (UCS-2), en-US
if(platformID == 3 && encodingID == 1 && languageID == 0x409){
int length = byteLength/2;
char[] chars=new char[length];
int index=stringOffset+offset;
for(int j = 0; j < length; j++){
chars[j] = (char)parser.ReadInt16(ref index);
}
string str = new string(chars);
if(property!=null){
map[property] = str;
}else{
unknownCount++;
map["unknown"+unknownCount] = str;
}
}
}
// Next grab the name and family. Done last as we must know name before family.
string name;
map.TryGetValue("fullName",out name);
string family;
map.TryGetValue("fontFamily",out family);
if(name==null){
name="[Untitled font face]";
}
// Apply name first:
font.Name=name;
if(family==null){
family="[Untitled font family]";
}
// Apply family name (which in turn creates the family instance):
font.FamilyName=family;
if(format==1){
// Language tag count:
parser.ReadUInt16();
}
return map;
}
//--------------------------------------
public static Glyph ParseGlyph(FontParser parser,FontFace font,float range){
// How many contours has it got?
int contourCount=parser.ReadInt16();
// Skip bounds - we don't trust these too much, so we'll figure them out ourselves:
parser.Position+=8;
if(contourCount>0){
// This glyph is not a composite.
// Create the glyph:
Glyph glyph=new Glyph(font);
if(Fonts.Preload){
LoadGlyph(glyph,contourCount,parser,range);
}else{
// Increase unloaded count:
font.UnloadedGlyphs++;
// Add position info:
glyph.AddPathNode(new LoadMetaPoint(parser.Position,contourCount));
}
return glyph;
}else if(contourCount==0){
// Empty glyph e.g. space. Create the glyph:
Glyph glyph=new Glyph(font);
return glyph;
}
CompositeGlyph compGlyph=new CompositeGlyph(font);
bool moreComponents=true;
while(moreComponents){
ushort cFlags=parser.ReadUInt16();
ushort glyphIndex=parser.ReadUInt16();
VectorTransform component=new VectorTransform(glyphIndex);
if ((cFlags & 1) > 0) {
// The arguments are words
component.Dx = (float)parser.ReadInt16() / range;
component.Dy = (float)parser.ReadInt16() / range;
} else {
// The arguments are bytes
component.Dx = (float)parser.ReadByte() / range;
component.Dy = (float)parser.ReadByte() / range;
}
if ((cFlags & 8) > 0) {
// We have one scale
component.XScale = component.YScale = parser.ReadF2Dot14();
} else if ((cFlags & 64) > 0) {
// We have an X / Y scale
component.XScale = parser.ReadF2Dot14();
component.YScale = parser.ReadF2Dot14();
} else if ((cFlags & 128) > 0) {
// We have a 2x2 transformation
component.XScale = parser.ReadF2Dot14();
component.Scale01 = parser.ReadF2Dot14();
component.Scale10 = parser.ReadF2Dot14();
component.YScale = parser.ReadF2Dot14();
}
// Push the component to the end:
compGlyph.AddComponent(component);
moreComponents = ((cFlags & 32)==32);
}
return compGlyph;
}
/// <summary>Adds a ligature table to the font.</summary>
public static void AddToFont(string name,FontParser parser,int tableOffset,FontFace font,LigatureLookupTable[] tables){
int position=parser.Position;
// Skip params (+2):
parser.Position=tableOffset+2;
// Index count:
int count=parser.ReadUInt16();
// For each one..
for(int i=0;i<count;i++){
// Grab the index:
//int index=parser.ReadUInt16();
// Grab the table:
//LigatureLookupTable table=tables[index];
}
parser.Position=position;
}
public static bool Load(FontParser parser,int start,FontFace font,Glyph[] glyphs){
// Seek there:
parser.Position=start;
// Read the version (and check if it's zero):
if(parser.ReadUInt16()!=0){
return false;
}
// Strangely the cmap table can have lots of tables inside it. For now we're looking for the common type 3 table.
// Number of tables:
int tableCount=parser.ReadUInt16();
// Total characters in font:
int characterCount=0;
int offset=-1;
int favour=0;
for(int i = 0; i < tableCount; i += 1) {
// Grab the platform ID:
int platformId=parser.ReadUInt16();
// And the encoding ID:
int encodingId=parser.ReadUInt16();
if(platformId==3 || platformId==0){
if(encodingId==10){
// Top favourite - most broad Unicode encoding.
// Read offset:
offset=(int)parser.ReadUInt32();
break;
}else if(encodingId==1 || encodingId==0){
// Read offset:
offset=(int)parser.ReadUInt32();
// Mid-range favourite:
favour=1;
continue;
}else if(favour==0){
// Anything else we'll give a try:
// Read offset (but don't break):
offset=(int)parser.ReadUInt32();
continue;
}
}
// Skip offset:
parser.Position+=4;
}
if(offset==-1){
// We don't support this font :(
return false;
}
// Seek to the cmap now:
parser.Position=start+offset;
// Check it's format 4:
int format=parser.ReadUInt16();
if(format>6){
// We now have e.g. 12.0 - another short here:
parser.Position+=2;
// Size/ structure are both 4 byte ints now:
parser.Position+=8;
}else{
// Size of the sub-table (map length, u16):
parser.Position+=2;
// Structure of the sub-table (map language, u16):
parser.Position+=2;
}
switch(format){
case 0:
// Byte encoding table:
for(int i=0;i<256;i++){
int rByte=parser.ReadByte();
Glyph glyph=glyphs[rByte];
if(glyph!=null){
characterCount++;
glyph.AddCharcode(i);
}
}
break;
case 2:
// The offset to the headers:
int subOffset=parser.Position + (256 * 2);
// For each high byte:
for(int i=0;i<256;i++){
// Read the index to the header and zero out the bottom 3 bits:
int headerPosition=subOffset + (parser.ReadUInt16() & (~7));
// Read the header:
int firstCode=parser.ReadUInt16(ref headerPosition);
int entryCount=parser.ReadUInt16(ref headerPosition);
short idDelta=parser.ReadInt16(ref headerPosition);
// Grab the current position:
int pos=headerPosition;
// Read the idRangeOffset - the last part of the header:
pos+=parser.ReadUInt16(ref headerPosition);
int maxCode=firstCode+entryCount;
// Get the high byte value:
int highByte=(i<<8);
// For each low byte:
for (int j=firstCode;j<maxCode;j++){
// Get the full charcode (which might not actually exist yet):
int charCode=highByte+j;
// Read the base of the glyphIndex:
int p=parser.ReadUInt16(ref pos);
if(p==0){
continue;
}
p=(p+idDelta) & 0xFFFF;
if(p==0){
continue;
}
Glyph glyph=glyphs[p];
if(glyph!=null){
characterCount++;
glyph.AddCharcode(charCode);
}
}
}
break;
case 4:
// Segment count. It's doubled.
int segCount=(parser.ReadUInt16() >> 1);
// Search range, entry selector and range shift (don't need any):
parser.Position+=6;
int baseIndex=parser.Position;
int endCountIndex=baseIndex;
baseIndex+=2;
int startCountIndex = baseIndex + segCount * 2;
int idDeltaIndex = baseIndex + segCount * 4;
int idRangeOffsetIndex = baseIndex + segCount * 6;
for(int i = 0; i < segCount - 1; i ++){
int endCount = parser.ReadUInt16(ref endCountIndex);
int startCount = parser.ReadUInt16(ref startCountIndex);
int idDelta = parser.ReadInt16(ref idDeltaIndex);
int idRangeOffset = parser.ReadUInt16(ref idRangeOffsetIndex);
for(int c = startCount; c <= endCount;c++){
int glyphIndex;
if(idRangeOffset != 0){
// The idRangeOffset is relative to the current position in the idRangeOffset array.
// Take the current offset in the idRangeOffset array.
int glyphIndexOffset = (idRangeOffsetIndex - 2);
// Add the value of the idRangeOffset, which will move us into the glyphIndex array.
glyphIndexOffset += idRangeOffset;
// Then add the character index of the current segment, multiplied by 2 for USHORTs.
glyphIndexOffset += (c - startCount) * 2;
glyphIndex=parser.ReadUInt16(ref glyphIndexOffset);
if(glyphIndex!=0){
glyphIndex = (glyphIndex + idDelta) & 0xFFFF;
}
}else{
glyphIndex = (c + idDelta) & 0xFFFF;
}
// Add a charcode to the glyph now:
Glyph glyph=glyphs[glyphIndex];
if(glyph!=null){
characterCount++;
glyph.AddCharcode(c);
}
}
}
break;
case 6:
int firstCCode=parser.ReadUInt16();
int entryCCount=parser.ReadUInt16();
for(int i=0;i<entryCCount;i++){
Glyph glyphC=glyphs[parser.ReadUInt16()];
if(glyphC!=null){
characterCount++;
glyphC.AddCharcode(firstCCode+i);
}
}
break;
case 12:
int groups=(int)parser.ReadUInt32();
for(int i=0;i<groups;i++){
int startCode=(int)parser.ReadUInt32();
int endCode=(int)parser.ReadUInt32();
int startGlyph=(int)parser.ReadUInt32();
int count=(endCode - startCode);
for(int j=0;j<=count;j++){
int glyphIndex=(startGlyph+j);
Glyph glyph=glyphs[glyphIndex];
if(glyph!=null){
characterCount++;
glyph.AddCharcode(startCode+j);
}
}
}
break;
default:
Fonts.OnLogMessage("InfiniText does not currently support this font. If you need it, please contact us with this: Format: "+format);
break;
}
font.CharacterCount=characterCount;
return true;
}
public static Glyph[] Load(FontParser parser, int offset, FontFace font)
{
// Create the parser:
CffGlyphParser cffParser = new CffGlyphParser(parser, font);
cffParser.FullLoad = Fonts.Preload;
font.CffParser = cffParser;
// Seek, skipping the 4 byte header:
parser.Position = offset + 4;
// Skip the name index:
SkipIndex(parser);
// Top dict index next (one entry only):
Dictionary <int, List <int> > topDict = LoadDict(parser);
// String index:
SkipIndex(parser);
// GSubr index:
cffParser.GSubrs = LoadSubIndex(parser);
// Figure out the bias:
cffParser.GsubrsBias = GetBias(cffParser.GSubrs);
// Read the private dict next - grab the info about where it is:
List <int> privateDictInfo = topDict[18];
// Get it's offset:
int privateDictOffset = offset + privateDictInfo[1];
// Seek there:
parser.Position = privateDictOffset;
// Load:
Dictionary <int, List <int> > privateDict = ParseCFFDict(parser, privateDictInfo[0]);
// Grab the default values:
cffParser.DefaultWidthX = (float)ReadDict(privateDict, 20);
cffParser.NominalWidthX = (float)ReadDict(privateDict, 21);
// Grab the subrs offset. May be zero (or non-existant):
int privateSubrs = ReadDict(privateDict, 19);
if (privateSubrs != 0)
{
// We have a "subroutine" set. Get it's full offset and hop there:
parser.Position = privateDictOffset + privateSubrs;
// Load the set:
cffParser.Subrs = LoadSubIndex(parser);
// Figure out the bias/offset:
cffParser.SubrsBias = GetBias(cffParser.Subrs);
}
// Seek to the char string table:
parser.Position = offset + ReadDict(topDict, 17);
// Time to actually load the actual glyphs, wohoo! O.O
return(LoadIndex(parser, cffParser));
}
public static void Load(FontParser parser, int offset, FontFace font)
{
// Got OS2:
parser.ReadOS2 = true;
// Seek:
parser.Position = offset;
// version
int version = parser.ReadUInt16();
// xAvgCharWidth
parser.ReadInt16();
// usWeightClass
int weight = parser.ReadUInt16();
// usWidthClass
parser.ReadUInt16();
// fsType
parser.ReadUInt16();
// ySubscriptXSize
parser.ReadInt16();
// ySubscriptYSize
parser.ReadInt16();
// ySubscriptXOffset
parser.ReadInt16();
// ySubscriptYOffset
parser.ReadInt16();
// ySuperscriptXSize
parser.ReadInt16();
// ySuperscriptYSize
parser.ReadInt16();
// ySuperscriptXOffset
parser.ReadInt16();
// ySuperscriptYOffset
parser.ReadInt16();
// yStrikeoutSize
font.StrikeSize = (float)parser.ReadInt16() / font.UnitsPerEmF;
// yStrikeoutPosition
font.StrikeOffset = (float)parser.ReadInt16() / font.UnitsPerEmF;
// sFamilyClass
parser.ReadInt16();
// panose:
/*
* byte panose=new byte[10];
*
* for(int i=0;i<10;i++){
* panose[i]=parser.ReadByte();
* }
*/
parser.Position += 10;
// ulUnicodeRange1
parser.ReadUInt32();
// ulUnicodeRange2
parser.ReadUInt32();
// ulUnicodeRange3
parser.ReadUInt32();
// ulUnicodeRange4
parser.ReadUInt32();
// achVendID
parser.ReadTag();
// fsSelection
int type = parser.ReadUInt16();
bool italic = ((type & 1) == 1);
// bool strikeout=((type&16)==16);
// bool underscore=((type&2)==2);
bool oblique = ((type & 512) == 512);
bool bold = ((type & 32) == 32);
bool regular = ((type & 64) == 64);
bool useTypo = ((type & 128) == 128);
if (!bold || regular)
{
// Must be regular:
weight = 400;
}
else if (weight == 0)
{
weight = 700;
}
font.SetFlags(italic || oblique, weight);
// usFirstCharIndex
parser.ReadUInt16();
// usLastCharIndex
parser.ReadUInt16();
// sTypoAscender
float ascender = (float)parser.ReadInt16() / font.UnitsPerEmF;
// sTypoDescender
float descender = (float)parser.ReadInt16() / font.UnitsPerEmF;
// sTypoLineGap
float lineGap = ((float)parser.ReadInt16() / font.UnitsPerEmF);
// usWinAscent
float wAscender = (float)parser.ReadUInt16() / font.UnitsPerEmF;
// usWinDescent
float wDescender = (float)parser.ReadUInt16() / font.UnitsPerEmF;
// This is an awkward spec hack due to most windows programs
// providing the wrong typo descender values.
if (Fonts.UseOS2Metrics)
{
if (useTypo)
{
float halfGap = lineGap / 2f;
font.Ascender = ascender + halfGap;
font.Descender = halfGap - descender;
font.LineGap = font.Ascender + font.Descender;
}
else
{
font.Ascender = wAscender;
font.Descender = wDescender;
font.LineGap = font.Ascender + font.Descender;
}
}
if (version >= 1)
{
// ulCodePageRange1
parser.ReadUInt32();
// ulCodePageRange2
parser.ReadUInt32();
}
if (version >= 2)
{
// sxHeight
parser.ReadInt16();
// sCapHeight
parser.ReadInt16();
// usDefaultChar
parser.ReadUInt16();
// usBreakChar
parser.ReadUInt16();
// usMaxContent
parser.ReadUInt16();
}
}
public static void Load(FontParser parser,int offset,FontFace font,out int numberOfGlyphs){
// Seek:
parser.Position=offset;
// version
float version=parser.ReadVersion();
// Italic angle. For some reason it's inverted in the spec - negative means a slope to the right.
int frac;
int dec=parser.ReadFixed(out frac);
if(frac!=0){
// Figure it out:
float angle=(float)dec/(float)frac;
// Apply it (un-inverted):
font.SetItalicAngle(-angle);
}
// underlinePosition
parser.ReadInt16();
// underlineThickness
parser.ReadInt16();
// isFixedPitch
parser.ReadUInt32();
// minMemType42
parser.ReadUInt32();
// maxMemType42
parser.ReadUInt32();
// minMemType1
parser.ReadUInt32();
// maxMemType1
parser.ReadUInt32();
if(version==2f){
numberOfGlyphs = parser.ReadUInt16();
/*
string[] glyphNames=new string[numberOfGlyphs];
for (int i = 0; i < numberOfGlyphs; i++) {
// Read the index:
int index = parser.ReadUInt16();
if(index >= StandardNames.Length){
// Read the name:
glyphNames[i]=parser.ReadString(parser.ReadByte());
}else{
// Grab the std name:
glyphNames[i]=StandardNames[index];
}
}
*/
}else if(version==2.5f){
numberOfGlyphs = parser.ReadUInt16();
/*
byte[] offsets = new byte[numberOfGlyphs];
for (int i = 0; i < post.numberOfGlyphs; i++){
offsets[i] = parser.ReadByte();
}
*/
}else{
numberOfGlyphs=-1;
}
}
//--------------------------------------
private static void SkipIndex(FontParser parser){
// How many are in here?
int count=parser.ReadUInt16();
if(count>0){
// Read the offset size:
int offsetSize=parser.ReadByte();
// Skip count offsets:
parser.Position+=offsetSize*count;
// Read the last offset:
int lastOffset=parser.ReadOffset(offsetSize);
// Seek there, minus one as their not zero based:
parser.Position+=lastOffset-1;
}
}
public static Dictionary<int,List<int>> ParseCFFDict(FontParser parser,int length){
// Create the results set:
Dictionary<int,List<int>> results=new Dictionary<int,List<int>>();
// Our first values set:
List<int> values=new List<int>();
// Note that rather awkwardly the key comes *after* the set of values.
int max=parser.Position+length;
// While there's more data..
while(parser.Position<max){
// Read the state byte:
int state=parser.ReadByte();
if(state<22){
if(state==12){
// 2 byte key code.
state=1200+parser.ReadByte();
}
// Push values:
results[state]=values;
// Clear:
values=new List<int>();
}else{
// Read the operand:
int operand=ParseOperand(parser,state);
// Push:
values.Add(operand);
}
}
return results;
}