/// <summary>Handles a table which is located at 'offset' in the stream and has the given tag.</summary>
public bool HandleTable(string tag, int offset, FontFace font)
{
switch (tag)
{
case "head":
// Load the header:
if (!HeaderTables.Load(this, offset, font, out IndexToLocFormat))
{
return(false);
}
break;
case "maxp":
// Maxp table:
MaxpTables.Load(this, offset, font, out GlyphCount);
break;
default:
// Add to set to load when the rest do:
Tables[tag] = new TableInfo(offset);
break;
}
// All Ok
return(true);
}
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);
}