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)
{
// 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 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 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 bool Load(FontParser parser, FontFace font, bool full)
{
font.RequiresLoad = !full;
font.Parser = parser;
// Read the magic number:
uint magic = parser.ReadUInt32();
if (magic == 0x00010000)
{
// TTF outline format.
}
else if (magic == 0x774F4646)
{
// WOFF 1
return(WoffLoader.Load(1, parser, font));
}
else if (magic == 0x774F4632)
{
// WOFF 2
return(WoffLoader.Load(2, parser, font));
}
else
{
// OpenType (probably) 0x4F54544F
// 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 (e.g. GPOS):
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;
// Handle the table now:
if (!parser.HandleTable(tag, offset, font))
{
return(false);
}
// Skip meta:
parser.Position = basePosition + 4;
}
if (full)
{
return(ReadTables(parser, font));
}
return(true);
}
public static bool Load(int version, FontParser parser, FontFace font)
{
// Load the V1/V2 header:
ushort numTables;
LoadHeader(version, parser, out numTables);
if (version == 1)
{
MemoryStream ms = new MemoryStream(parser.Data);
// Get the ZLIB compression helper:
Compressor zLib = Compression.Get("zlib");
// Read each table next.
for (int i = 0; i < numTables; i++)
{
string tag = parser.ReadTag();
uint offset = parser.ReadUInt32();
uint compLength = parser.ReadUInt32();
uint origLength = parser.ReadUInt32();
parser.ReadUInt32(); // origChecksum
// Cache position:
int pos = parser.Position;
if (compLength != origLength)
{
// Decompress the table now (zlib)
// Seek to table:
ms.Position = (int)offset;
// Decompressed data:
byte[] decompressedTable = new byte[(int)origLength];
// Decompress now into our target bytes:
zLib.Decompress(ms, decompressedTable);
}
else
{
// Ordinary table.
parser.HandleTable(tag, (int)offset, font);
}
// Restore position:
parser.Position = pos;
}
}
else if (version == 2)
{
// Read each table entry next. The data here is compressed as one single block after the table meta.
Woff2Table[] tableHeaders = new Woff2Table[numTables];
int offset = 0;
for (int i = 0; i < numTables; i++)
{
// Read the table entry:
byte flags = parser.ReadByte();
string tag;
int tagFlag = (flags & 63);
if (tagFlag == 63)
{
tag = parser.ReadTag();
}
else
{
tag = TagLookup[tagFlag];
}
ulong origLength = parser.ReadBase128();
ulong transformLength = 0;
int transformVersion = (flags >> 6); //0-3
if (tag == "glyf" || tag == "loca")
{
// transform length:
transformLength = parser.ReadBase128();
}
offset += (int)origLength;
tableHeaders[i] = new Woff2Table(tag, offset, (int)transformLength, transformVersion);
}
}
// All ok:
return(true);
}
private static int LoadSubTable(FontParser parser, int start, FontFace font, Glyph[] glyphs)
{
// Total characters in subtable:
int characterCount = 0;
// Seek to the cmap now:
parser.Position = start;
// Check it's format 4:
int format = parser.ReadUInt16();
#if INFINITEXT_DEBUG
Fonts.OnLogMessage("Cmap subtable format: " + format);
#endif
if (format > 13)
{
// We now have e.g. 14.0 - ulong here ("Length"):
parser.Position += 4;
}
else if (format > 6)
{
// We now have e.g. 12.0 - another short here (reserved):
parser.Position += 2;
// Length and language 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 10:
// Trimmed array. Similar to format 6.
int startCharCode = parser.ReadUInt16();
int numChars = parser.ReadUInt16();
for (int i = 0; i < numChars; i++)
{
Glyph glyphC = glyphs[parser.ReadUInt16()];
if (glyphC != null)
{
characterCount++;
glyphC.AddCharcode(startCharCode + i);
}
}
break;
case 12:
// Segmented coverage.
// Mapping of 1 charcode to 1 glyph. "Segmented" because it can come in blocks called groups.
int groups = (int)parser.ReadUInt32();
// For each group of glyphs..
for (int i = 0; i < groups; i++)
{
// Start/end charcode:
int startCode = (int)parser.ReadUInt32();
int endCode = (int)parser.ReadUInt32();
// Start glyph ID:
int startGlyph = (int)parser.ReadUInt32();
int count = (endCode - startCode);
// For each glyph/charcode pair..
for (int j = 0; j <= count; j++)
{
// Get the glyph:
int glyphIndex = (startGlyph + j);
Glyph glyph = glyphs[glyphIndex];
if (glyph != null)
{
characterCount++;
// Charcode is..
glyph.AddCharcode(startCode + j);
}
}
}
break;
case 13:
// Many to one. Same format as #12 but the meaning is a bit different.
// How many groups?
int glyphCount = (int)parser.ReadUInt32();
for (int i = 0; i < glyphCount; i++)
{
int startCode = (int)parser.ReadUInt32();
int endCode = (int)parser.ReadUInt32();
int glyphID = (int)parser.ReadUInt32();
// Get the glyph:
Glyph glyph = glyphs[glyphID];
if (glyph != null)
{
int count = (endCode - startCode);
// For each charcode..
for (int j = 0; j <= count; j++)
{
characterCount++;
// Hook up glyph to this charcode:
glyph.AddCharcode(startCode + j);
}
}
}
break;
case 14:
Fonts.OnLogMessage("InfiniText partially supports part of the font '" + font.Family.Name + "' - this is harmless. Search for this message for more.");
// This font contains a format 14 CMAP Table.
// Format 14 is "Unicode variation selectors" - essentially different versions of the same character.
// E.g. a text Emoji character and a graphical one.
// In a text system like InfiniText, that just means we must map a bunch of different charcodes
// to the same glyph.
// .. I Think! As usual, the OpenType spec doesn't make too much sense.
// However, it appears to be entirely optional.
// So, approx implementation is below, however getting the utf32 code point from the variation + base character
// is completely undocumented - my best guess unfortunately threw errors.
// See the commented out block below!
break;
/*
*
* case 14:
*
* // How many var selector records?
* int records=(int)parser.ReadUInt32();
*
* for(int i=0;i<records;i++){
*
* // variation selector:
* int varSelector=(int)parser.ReadUInt24();
*
* // Offsets:
* int defaultUVSOffset=(int)parser.ReadUInt32();
* int nonDefaultUVSOffset=(int)parser.ReadUInt32();
*
* // Grab parser position:
* int position=parser.Position;
*
* // Got a ref to a default style table?
* if(defaultUVSOffset!=0){
*
* // Yep! The UVS is simply a list of "base" characters, each with ranges of available charcodes.
* // [BaseCharCode][The extended part. Each of these comes from the range.]
* // The actual glyph is the one that we get by directly looking up each of the base characters.
*
* // Seek to the table:
* parser.Position=start+defaultUVSOffset;
*
* // Read the unicode value ranges count:
* int numUniRangesCount=(int)parser.ReadUInt32();
*
* // For each one..
* for(int m=0;m<numUniRangesCount;m++){
*
* // Read the base charcode:
* int baseCharcode=(int)parser.ReadUInt24();
*
* // Read the size of the range:
* byte rangeSize=parser.ReadByte();
*
* for(int c=0;c<=rangeSize;c++){
*
* // Fetch the base glyph:
* Glyph glyph=font.GetGlyphDirect(baseCharcode);
*
* if(glyph!=null){
*
* // Combine baseCharcode with varSelector next to form the variation (of "glyph").
*
* // Get the full charcode (this is incorrect!):
* // int charcode=char.ConvertToUtf32((char)baseCharcode,(char)varSelector);
*
* // Add:
* //glyph.AddCharcode(charcode);
*
* }
*
* // Move baseCharcode along:
* baseCharcode++;
*
* }
*
* }
*
* // Restore parser:
* parser.Position=position;
*
* }
*
* // Got a ref to a non-default style table?
* if(nonDefaultUVSOffset!=0){
*
* // Yep! The UVS is simply a list of "base" characters, each with ranges of available charcodes.
* // [BaseCharCode][The extended part. Each of these comes from the range.]
* // This time though, the glyph to use is directly specified
* // (that's what gives it the "non-default" property).
*
* // Seek to the table:
* parser.Position=start+nonDefaultUVSOffset;
*
* // Read the number of mappings:
* int numMappings=(int)parser.ReadUInt32();
*
* // For each one..
* for(int m=0;m<numMappings;m++){
*
* // Read the base charcode:
* int baseCharcode=(int)parser.ReadUInt24();
*
* // Read glyph ID:
* int glyphID=(int)parser.ReadUInt16();
*
* // Get the glyph:
* Glyph glyph=glyphs[glyphID];
*
* if(glyph!=null){
*
* // Combine baseCharcode with varSelector next to form the variation (of "glyph").
*
* // Get the full charcode (this is incorrect!):
* // int charcode=char.ConvertToUtf32((char)baseCharcode,(char)varSelector);
*
* // Add:
* //glyph.AddCharcode(charcode);
*
* }
*
* }
*
* // Restore parser:
* parser.Position=position;
*
* }
*
* }
*
* break;
*
*/
default:
Fonts.OnLogMessage("InfiniText does not currently support part of this font. If you need it, please contact us with this: Format: " + format);
break;
}
return(characterCount);
}
public static void Load(FontParser parser, int offset, FontFace font)
{
// Seek:
parser.Position = offset;
// version
int version = parser.ReadUInt16();
// xAvgCharWidth
parser.ReadInt16();
// usWeightClass
int weight = parser.ReadUInt16();
// usWidthClass
int stretch = 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;
}
int styleCode = 0;
if (italic)
{
styleCode = FontFaceFlags.Italic;
}
else if (oblique)
{
styleCode = FontFaceFlags.Oblique;
}
font.SetFlags(styleCode, weight, stretch);
// 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);
// We'll now always use OS/2 unless this table isn't present, in which case HHEA takes over.
// (The W3C suggested approach).
if (Fonts.AlwaysUseTypo || useTypo)
{
// Apply as-is:
font.Ascender = ascender;
font.Descender = -descender;
font.LineGap = lineGap;
// Remove internal leading if there is one:
float internalLeading = (ascender - descender) - 1f;
if (internalLeading != 0f)
{
// Add to lineGap:
font.Ascender -= internalLeading;
font.LineGap += internalLeading;
}
// Skip windows ascent/descent
parser.Position += 4;
}
else
{
// usWinAscent
parser.usWinAscent = (float)parser.ReadUInt16() / font.UnitsPerEmF;
// usWinDescent
parser.usWinDescent = (float)parser.ReadUInt16() / font.UnitsPerEmF;
}
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 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);
}
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 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.
// -> Got to grab all tables for a particular "platform".
// -> Prefer platform 3 (Microsoft, most common and best documented), then 0, then anything else.
// So, first let's figure out which platform we'll be using.
// Favourite platform so far:
int selectedPlatform = -1;
// Number of tables:
int tableCount = parser.ReadUInt16();
for (int i = 0; i < tableCount; i += 1)
{
// Grab the platform ID:
int platformId = parser.ReadUInt16();
if (platformId == 0)
{
// Great, got platform 0.
// Just halt there because we know this fonts got 0 so we'll use that.
selectedPlatform = 0;
break;
}
else if (platformId == 3)
{
// Prefer 3 over others:
selectedPlatform = 3;
}
else if (selectedPlatform == -1)
{
// Anything else (last resort):
selectedPlatform = platformId;
}
// Skip encoding ID and offset:
parser.Position += 6;
}
if (selectedPlatform == -1)
{
// Empty table! Return.
return(false);
}
// Round 2. This time, select all subtables of the favourite platform.
// Then collect the offset and load it up.
// Reset parser, skipping count and version:
parser.Position = start + 4;
// For each table..
for (int i = 0; i < tableCount; i += 1)
{
// Grab the platform ID:
int platformId = parser.ReadUInt16();
#if INFINITEXT_DEBUG
// And the encoding ID:
int encodingId = parser.ReadUInt16();
Fonts.OnLogMessage("Font " + font.FamilyName + " cmap subtable. Platform ID: " + platformId + ", encoding ID: " + encodingId);
#else
// And the encoding ID:
parser.ReadUInt16();
#endif
if (platformId == selectedPlatform)
{
// Read offset:
int offset = (int)parser.ReadUInt32();
// Get position:
int position = parser.Position;
// Load the subtable now:
font.CharacterCount += LoadSubTable(parser, start + offset, font, glyphs);
// Reset parser:
parser.Position = position;
}
else
{
// Skip offset:
parser.Position += 4;
}
}
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 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();
}
}