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 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 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;
}
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 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)
{
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();
}
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 void Load(FontParser parser){
// Format:
int format=parser.ReadUInt16();
switch(format){
case 1:
break;
case 2:
break;
}
}
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 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;
}
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;
}
}
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);
}
}
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;
}
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 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 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();
}
/// <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 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 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 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;
}
}
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;
}