//------------------------------------------------------------------------------------------xx.02.2005
/// <summary>Reads the table "hmtx" (glyph widths).</summary>
/// <remarks>The glyph widths are normalized to 1000 units.</remarks>
/// <param name="openTypeReader">Open Type Reader</param>
private void ReadTable_hmtx(OpenTypeReader openTypeReader)
{
aiGlyphWidth = new Int32[horizontalHeader.iNumberOfHMetrics];
TableDirectory tableDirectory = dict_TableDirectory["hmtx"];
openTypeReader.Seek(tableDirectory.iOffset);
for (Int32 i = 0; i < aiGlyphWidth.Length; i++)
{
Int32 iWidth = openTypeReader.iReadUSHORT();
aiGlyphWidth[i] = iWidth;
openTypeReader.iReadUSHORT(); // left side bearing
}
}
//------------------------------------------------------------------------------------------16.02.2005
#region Table "name"
//----------------------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------------xx.02.2005
/// <summary>Reads the table "name".</summary>
/// <param name="openTypeReader">Open Type Reader</param>
private void ReadTable_name(OpenTypeReader openTypeReader)
{
TableDirectory tableDirectory = dict_TableDirectory["name"];
openTypeReader.Seek(tableDirectory.iOffset + 2);
Int32 iNumberOfRecords = openTypeReader.iReadUSHORT();
Int32 iStringOffset = openTypeReader.iReadUSHORT();
for (Int32 i = 0; i < iNumberOfRecords; i++)
{
openTypeReader.Seek(tableDirectory.iOffset + 6 + i * 12);
Int32 iPlatformId = openTypeReader.iReadUSHORT();
Int32 iEncodingId = openTypeReader.iReadUSHORT();
Int32 iLanguageId = openTypeReader.iReadUSHORT();
Int32 iNameId = openTypeReader.iReadUSHORT();
Int32 iLength = openTypeReader.iReadUSHORT();
Int32 iOffset = openTypeReader.iReadUSHORT();
if (iNameId == 4)
{
openTypeReader.Seek(tableDirectory.iOffset + iStringOffset + iOffset);
String sName;
if (iPlatformId == 0 || (iPlatformId == 2 && iEncodingId == 1) || iPlatformId == 3)
{
sName = openTypeReader.sReadUnicodeString(iLength);
}
else
{
sName = openTypeReader.sReadCHAR(iLength);
}
sName = sName.Replace(Environment.NewLine, ";");
//Console.WriteLine(iPlatformId + "\t" + iEncodingId + "\t" + iLanguageId + "\t" + iNameId + "\t" + sName);
sFullFontName = sName.Replace(' ', '_');
}
else if (iNameId == 6)
{
openTypeReader.Seek(tableDirectory.iOffset + iStringOffset + iOffset);
if (iPlatformId == 0 || iPlatformId == 3)
{
sBaseFontName = openTypeReader.sReadUnicodeString(iLength);
}
else
{
sBaseFontName = openTypeReader.sReadCHAR(iLength);
}
}
}
}
//------------------------------------------------------------------------------------------xx.02.2005
/// <summary>Reads the font data from the file.</summary>
/// <param name="openTypeReader">Open Type Reader</param>
private void ReadFontDataFromFile(OpenTypeReader openTypeReader)
{
#region TrueType Collection
if (bTrueTypeCollection)
{
String sTTCTag = openTypeReader.sReadTag();
if (sTTCTag != "ttcf")
{
throw new ReportException("'" + sFontName + " is not a valid TTC font file.");
}
UInt32 uVersion = openTypeReader.uReadULONG();
Int32 iNumFonts = (Int32)openTypeReader.uReadULONG();
if (iTrueTypeCollectionIndex >= iNumFonts)
{
throw new ReportException("'" + sFontName + " has invalid TrueType collection index.");
}
openTypeReader.Skip(iTrueTypeCollectionIndex * 4);
Int32 iOffset = (Int32)openTypeReader.uReadULONG();
openTypeReader.Seek(iOffset);
}
#endregion
#region Offset Table
UInt32 uSfntVersion = openTypeReader.uReadULONG();
if (uSfntVersion == 0x4F54544F /* 'OTTO' */)
{
fontDataType = FontDataType.CFFdata;
}
#if DEBUG
else if (uSfntVersion == 0x00010000 /* Version 1.0 */)
{
fontDataType = FontDataType.TrueTypeOutlines;
}
else
{
throw new ReportException("'" + sFontName + " is not a valid TTF, OTF or TTC font file.");
}
#endif
iNumTables = (Int32)openTypeReader.iReadUSHORT();
iSearchRange = (Int32)openTypeReader.iReadUSHORT();
iEntrySelector = (Int32)openTypeReader.iReadUSHORT();
iRangeShift = (Int32)openTypeReader.iReadUSHORT();
#endregion
#region Table Directory
for (Int32 iTable = 0; iTable < iNumTables; iTable++)
{
TableDirectory tableDirectory_New = new TableDirectory();
tableDirectory_New.sTag = openTypeReader.sReadTag();
tableDirectory_New.uCheckSum = openTypeReader.uReadULONG();
tableDirectory_New.iOffset = (Int32)openTypeReader.uReadULONG();
tableDirectory_New.iLength = (Int32)openTypeReader.uReadULONG();
dict_TableDirectory.Add(tableDirectory_New.sTag, tableDirectory_New);
}
Boolean bCFF = dict_TableDirectory.ContainsKey("CFF");
if ((bCFF && fontDataType == FontDataType.TrueTypeOutlines) || (!bCFF && fontDataType == FontDataType.CFFdata))
{
throw new ReportException("'" + sFontName + " is not a valid TTC font file.");
}
#endregion
#region Font Header
TableDirectory tableDirectory = dict_TableDirectory["head"];
fontHeader = new FontHeader();
openTypeReader.Seek(tableDirectory.iOffset);
fontHeader.uTableVersionNumber = openTypeReader.uReadULONG();
Debug.Assert(fontHeader.uTableVersionNumber == 0x00010000 /* Version 1.0 */);
openTypeReader.Skip(12);
fontHeader.iFlags = openTypeReader.iReadUSHORT();
fontHeader.iUnitsPerEm = openTypeReader.iReadUSHORT();
openTypeReader.Skip(16);
fontHeader.iXMin = openTypeReader.int16_ReadSHORT();
fontHeader.iYMin = openTypeReader.int16_ReadSHORT();
fontHeader.iXMax = openTypeReader.int16_ReadSHORT();
fontHeader.iYMax = openTypeReader.int16_ReadSHORT();
fontHeader.iMacStyle = openTypeReader.iReadUSHORT();
fontHeader.iLowestRecPPEM = openTypeReader.iReadUSHORT();
fontHeader.iFontDirectionHint = openTypeReader.int16_ReadSHORT();
fontHeader.iIndexToLocFormat = openTypeReader.int16_ReadSHORT();
fontHeader.iGlyphDataFormat = openTypeReader.int16_ReadSHORT();
#endregion
#region Horizontal Header
tableDirectory = dict_TableDirectory["hhea"];
horizontalHeader = new HorizontalHeader();
openTypeReader.Seek(tableDirectory.iOffset);
horizontalHeader.uTableVersionNumber = openTypeReader.uReadULONG();
Debug.Assert(horizontalHeader.uTableVersionNumber == 0x00010000 /* Version 1.0 */);
horizontalHeader.iAscender = openTypeReader.int16_ReadFWORD();
horizontalHeader.iDescender = openTypeReader.int16_ReadFWORD();
horizontalHeader.iLineGap = openTypeReader.int16_ReadFWORD();
horizontalHeader.iAdvanceWidthMax = openTypeReader.iReadUFWORD();
horizontalHeader.iMinLeftSideBearing = openTypeReader.int16_ReadFWORD();
horizontalHeader.iMinRightSideBearing = openTypeReader.int16_ReadFWORD();
horizontalHeader.iXMaxExtent = openTypeReader.int16_ReadFWORD();
horizontalHeader.iCaretSlopeRise = openTypeReader.int16_ReadSHORT();
horizontalHeader.iCaretSlopeRun = openTypeReader.int16_ReadSHORT();
horizontalHeader.iCaretOffset = openTypeReader.int16_ReadSHORT();
openTypeReader.Skip(10);
horizontalHeader.iNumberOfHMetrics = openTypeReader.iReadUSHORT();
#endregion
#region Windows Metrics (OS/2)
tableDirectory = dict_TableDirectory["OS/2"];
winMetrics = new WinMetrics();
openTypeReader.Seek(tableDirectory.iOffset);
winMetrics.iVersion = openTypeReader.iReadUSHORT();
winMetrics.iXAvgCharWidth = openTypeReader.int16_ReadSHORT();
winMetrics.iUsWeightClass = openTypeReader.iReadUSHORT();
winMetrics.iUsWidthClass = openTypeReader.iReadUSHORT();
winMetrics.iFsType = openTypeReader.iReadUSHORT();
winMetrics.iYSubscriptXSize = openTypeReader.int16_ReadSHORT();
winMetrics.iYSubscriptYSize = openTypeReader.int16_ReadSHORT();
winMetrics.iYSubscriptXOffset = openTypeReader.int16_ReadSHORT();
winMetrics.iYSubscriptYOffset = openTypeReader.int16_ReadSHORT();
winMetrics.iYSuperscriptXSize = openTypeReader.int16_ReadSHORT();
winMetrics.iYSuperscriptYSize = openTypeReader.int16_ReadSHORT();
winMetrics.iYSuperscriptXOffset = openTypeReader.int16_ReadSHORT();
winMetrics.iYSuperscriptYOffset = openTypeReader.int16_ReadSHORT();
winMetrics.iYStrikeoutSize = openTypeReader.int16_ReadSHORT();
winMetrics.iYStrikeoutPosition = openTypeReader.int16_ReadSHORT();
winMetrics.iSFamilyClass = openTypeReader.int16_ReadSHORT();
winMetrics.aByte_Panose = openTypeReader.aByte_ReadBYTE(10);
if (winMetrics.iVersion == 0)
{
openTypeReader.Skip(4); // skip ulCharRange
}
else
{
winMetrics.uUlUnicodeRange1 = openTypeReader.uReadULONG();
winMetrics.uUlUnicodeRange2 = openTypeReader.uReadULONG();
winMetrics.uUlUnicodeRange3 = openTypeReader.uReadULONG();
winMetrics.uUlUnicodeRange4 = openTypeReader.uReadULONG();
}
winMetrics.sAchVendID = openTypeReader.sReadTag();
winMetrics.iFsSelection = openTypeReader.iReadUSHORT();
winMetrics.iUsFirstCharIndex = openTypeReader.iReadUSHORT();
winMetrics.iUsLastCharIndex = openTypeReader.iReadUSHORT();
winMetrics.iSTypoAscender = openTypeReader.int16_ReadSHORT();
winMetrics.iSTypoDescender = openTypeReader.int16_ReadSHORT();
winMetrics.iSTypoLineGap = openTypeReader.int16_ReadSHORT();
winMetrics.iUsWinAscent = openTypeReader.iReadUSHORT();
winMetrics.iUsWinDescent = openTypeReader.iReadUSHORT();
if (winMetrics.iVersion > 0)
{
winMetrics.iUlCodePageRange1 = openTypeReader.uReadULONG();
winMetrics.iUlCodePageRange2 = openTypeReader.uReadULONG();
if (winMetrics.iVersion > 1)
{
winMetrics.iSXHeight = openTypeReader.int16_ReadSHORT();
winMetrics.iSCapHeight = openTypeReader.int16_ReadSHORT();
winMetrics.uUsDefaultChar = openTypeReader.uReadULONG();
winMetrics.uUsBreakChar = openTypeReader.uReadULONG();
winMetrics.uUsMaxContext = openTypeReader.uReadULONG();
}
}
#endregion
#region Post
tableDirectory = dict_TableDirectory["post"];
openTypeReader.Seek(tableDirectory.iOffset + 4);
Double r1 = openTypeReader.int16_ReadSHORT();
Double r0 = openTypeReader.iReadUSHORT();
rItalicAngle = r1 + r0 / 16384.0;
iUnderlinePosition = openTypeReader.int16_ReadFWORD();
iUnderlineThickness = openTypeReader.int16_ReadFWORD();
bFixedPitch = (openTypeReader.uReadULONG() != 0);
#endregion
ReadTable_name(openTypeReader);
ReadTable_hmtx(openTypeReader);
}