/// <summary>
/// Creates an instance of a class that implements the FontTable interface.
/// </summary>
/// <param name="tableName">
/// One of the pre-defined TrueType tables from the <see cref="TableNames"/> class.
/// </param>
/// <returns>
/// A subclass of <see cref="FontTable"/> that is capable of parsing
/// a TrueType table.
/// </returns>
/// <exception cref="ArgumentException">
/// If a class capable of parsing <i>tableName</i> is not available.
/// </exception>
public static FontTable Make(string tableName, FontFileReader reader) {
DirectoryEntry entry = reader.GetDictionaryEntry(tableName);
switch (tableName) {
case TableNames.Head:
return new HeaderTable(entry);
case TableNames.Hhea:
return new HorizontalHeaderTable(entry);
case TableNames.Hmtx:
return new HorizontalMetricsTable(entry);
case TableNames.Maxp:
return new MaximumProfileTable(entry);
case TableNames.Loca:
return new IndexToLocationTable(entry);
case TableNames.Glyf:
return new GlyfDataTable(entry);
case TableNames.Cvt:
return new ControlValueTable(entry);
case TableNames.Prep:
return new ControlValueProgramTable(entry);
case TableNames.Fpgm:
return new FontProgramTable(entry);
case TableNames.Post:
return new PostTable(entry);
case TableNames.Os2:
return new OS2Table(entry);
case TableNames.Name:
return new NameTable(entry);
case TableNames.Kern:
return new KerningTable(entry);
default:
throw new ArgumentException("Unrecognised table name '" + tableName + "'", "tableName");
}
}
/// <summary>
/// Reads the contents of the "hmtx" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
// Obtain number of horizonal metrics from 'hhea' table
int numberOfHMetrics = reader.GetHorizontalHeaderTable().HMetricCount;
// Obtain glyph count from 'maxp' table
int numGlyphs = reader.GetMaximumProfileTable().GlyphCount;
// Metrics might not be supplied for each glyph. For example, if
// the font is monospaced the hMetrics array will only contain a
// single entry
int metricsSize = (numGlyphs > numberOfHMetrics) ? numGlyphs : numberOfHMetrics;
metrics = new ArrayList(metricsSize);
for (int i = 0; i < numberOfHMetrics; i++) {
metrics.Add(new HorizontalMetric(
stream.ReadUShort(), stream.ReadShort()));
}
// Fill in missing widths
if (numberOfHMetrics < metricsSize) {
HorizontalMetric lastHMetric = (HorizontalMetric) metrics[metrics.Count - 1];
for (int i = numberOfHMetrics; i < numGlyphs; i++) {
metrics.Add(
new HorizontalMetric(lastHMetric.AdvanceWidth, stream.ReadShort()));
}
}
}
/// <summary>
/// Reads the contents of the "maxp" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
// These two fields are common to versions 0.5 and 1.0
versionNo = stream.ReadFixed();
numGlyphs = stream.ReadUShort();
// Version 1.0 of this table contains more data
if (versionNo == 0x00010000)
{
maxPoints = stream.ReadUShort();
maxContours = stream.ReadUShort();
maxCompositePoints = stream.ReadUShort();
maxCompositeContours = stream.ReadUShort();
maxZones = stream.ReadUShort();
maxTwilightPoints = stream.ReadUShort();
maxStorage = stream.ReadUShort();
maxFunctionDefs = stream.ReadUShort();
maxInstructionDefs = stream.ReadUShort();
maxStackElements = stream.ReadUShort();
maxSizeOfInstructions = stream.ReadUShort();
maxComponentElements = stream.ReadUShort();
maxComponentDepth = stream.ReadUShort();
}
}
/// <summary>
/// Reads the contents of the "hmtx" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
// Obtain number of horizonal metrics from 'hhea' table
int numberOfHMetrics = reader.GetHorizontalHeaderTable().HMetricCount;
// Obtain glyph count from 'maxp' table
int numGlyphs = reader.GetMaximumProfileTable().GlyphCount;
// Metrics might not be supplied for each glyph. For example, if
// the font is monospaced the hMetrics array will only contain a
// single entry
int metricsSize = (numGlyphs > numberOfHMetrics) ? numGlyphs : numberOfHMetrics;
metrics = new List <HorizontalMetric>();//(metricsSize);
for (int i = 0; i < numberOfHMetrics; i++)
{
metrics.Add(new HorizontalMetric(stream.ReadUShort(), stream.ReadShort()));
}
// Fill in missing widths
if (numberOfHMetrics < metricsSize)
{
HorizontalMetric lastHMetric = metrics[metrics.Count - 1];
for (int i = numberOfHMetrics; i < numGlyphs; i++)
{
metrics.Add(
new HorizontalMetric(lastHMetric.AdvanceWidth, stream.ReadShort()));
}
}
}
/// <summary>
/// Reads the contents of the "loca" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
// Glyph offsets can be stored in either short of long format
bool isShortFormat = reader.GetHeaderTable().IsShortFormat;
// Number of glyphs including extra entry
int glyphCount = reader.GetMaximumProfileTable().GlyphCount + 1;
offsets = new ArrayList(glyphCount);
for (int i = 0; i < glyphCount; i++) {
offsets.Insert(i, (isShortFormat) ? (uint) (stream.ReadUShort() << 1) : stream.ReadULong());
}
}
/// <summary>
/// Creates an instance of a class that implements the FontTable interface.
/// </summary>
/// <param name="tableName">
/// One of the pre-defined TrueType tables from the <see cref="TableNames"/> class.
/// </param>
/// <returns>
/// A subclass of <see cref="FontTable"/> that is capable of parsing
/// a TrueType table.
/// </returns>
/// <exception cref="ArgumentException">
/// If a class capable of parsing <i>tableName</i> is not available.
/// </exception>
public static FontTable Make(string tableName, FontFileReader reader)
{
DirectoryEntry entry = reader.GetDictionaryEntry(tableName);
switch (tableName)
{
case TableNames.Head:
return(new HeaderTable(entry));
case TableNames.Hhea:
return(new HorizontalHeaderTable(entry));
case TableNames.Hmtx:
return(new HorizontalMetricsTable(entry));
case TableNames.Maxp:
return(new MaximumProfileTable(entry));
case TableNames.Loca:
return(new IndexToLocationTable(entry));
case TableNames.Glyf:
return(new GlyfDataTable(entry));
case TableNames.Cvt:
return(new ControlValueTable(entry));
case TableNames.Prep:
return(new ControlValueProgramTable(entry));
case TableNames.Fpgm:
return(new FontProgramTable(entry));
case TableNames.Post:
return(new PostTable(entry));
case TableNames.Os2:
return(new OS2Table(entry));
case TableNames.Name:
return(new NameTable(entry));
case TableNames.Kern:
return(new KerningTable(entry));
default:
throw new ArgumentException("Unrecognised table name '" + tableName + "'", "tableName");
}
}
/// <summary>
/// Reads the contents of the "kern" table from the current position
/// in the supplied stream.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
// Skip version field
stream.Skip(PrimitiveSizes.UShort);
// Number of subtables
int numTables = stream.ReadUShort();
for (int i = 0; i < numTables; i++)
{
// Another pesky version field
stream.Skip(PrimitiveSizes.UShort);
// Length of the subtable, in bytes (including header).
ushort length = stream.ReadUShort();
// Type of information is contained in this table.
ushort coverage = stream.ReadUShort();
// Only interested in horiztonal kerning values in format 0
if ((coverage & HoriztonalMask) == 1 &&
(coverage & MinimumMask) == 0 &&
((coverage >> 8) == 0))
{
// The number of kerning pairs in the table.
int numPairs = stream.ReadUShort();
hasKerningInfo = true;
pairs = new KerningPairs(numPairs);
// Skip pointless shit
stream.Skip(3 * PrimitiveSizes.UShort);
for (int j = 0; j < numPairs; j++)
{
pairs.Add(
stream.ReadUShort(), // Left glyph index
stream.ReadUShort(), // Right glyph index
stream.ReadFWord()); // Kerning amount
}
}
else
{
stream.Skip(length - 3 * PrimitiveSizes.UShort);
}
}
}
/// <summary>
/// Reads the contents of the "os/2" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
version = stream.ReadUShort();
avgCharWidth = stream.ReadShort();
usWeightClass = stream.ReadUShort();
usWidthClass = stream.ReadUShort();
// According to the OpenType spec, bit 0 must be zero.
fsType = (ushort)(stream.ReadUShort() & ~1);
subscriptXSize = stream.ReadShort();
subscriptYSize = stream.ReadShort();
subscriptXOffset = stream.ReadShort();
subscriptYOffset = stream.ReadShort();
superscriptXSize = stream.ReadShort();
superscriptYSize = stream.ReadShort();
superscriptXOffset = stream.ReadShort();
superscriptYOffset = stream.ReadShort();
strikeoutSize = stream.ReadShort();
strikeoutPosition = stream.ReadShort();
short familyClass = stream.ReadShort();
classID = (byte)(familyClass >> 8);
subclassID = (byte)(familyClass & 255);
stream.Read(panose, 0, panose.Length);
unicodeRange1 = stream.ReadULong();
unicodeRange2 = stream.ReadULong();
unicodeRange3 = stream.ReadULong();
unicodeRange4 = stream.ReadULong();
vendorID[0] = stream.ReadChar();
vendorID[1] = stream.ReadChar();
vendorID[2] = stream.ReadChar();
vendorID[3] = stream.ReadChar();
fsSelection = stream.ReadUShort();
usFirstCharIndex = stream.ReadUShort();
usLastCharIndex = stream.ReadUShort();
typoAscender = stream.ReadShort();
typoDescender = stream.ReadShort();
typoLineGap = stream.ReadShort();
usWinAscent = stream.ReadUShort();
usWinDescent = stream.ReadUShort();
codePageRange1 = stream.ReadULong();
codePageRange2 = stream.ReadULong();
sxHeight = stream.ReadShort();
sCapHeight = stream.ReadShort();
usDefaultChar = stream.ReadUShort();
usBreakChar = stream.ReadUShort();
usMaxContext = stream.ReadUShort();
}
/// <summary>
/// Reads the contents of the "loca" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
// Glyph offsets can be stored in either short of long format
bool isShortFormat = reader.GetHeaderTable().IsShortFormat;
// Number of glyphs including extra entry
int glyphCount = reader.GetMaximumProfileTable().GlyphCount + 1;
offsets = new ArrayList(glyphCount);
for (int i = 0; i < glyphCount; i++)
{
offsets.Insert(i, (isShortFormat) ? (uint)(stream.ReadUShort() << 1) : stream.ReadULong());
}
}
/// <summary>
/// Reads the contents of the "post" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
version = stream.ReadFixed();
// The italic angle is stored in the stupid fixed field format.
italicAngle = (float)stream.ReadFixed() / 65536.0f;
underlinePosition = stream.ReadFWord();
underlineThickness = stream.ReadFWord();
fixedPitch = stream.ReadULong();
minMemType42 = stream.ReadULong();
maxMemType42 = stream.ReadULong();
minMemType1 = stream.ReadULong();
maxMemType1 = stream.ReadULong();
}
/// <summary>
/// Reads the contents of the "name" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
// Ignore format selector field
stream.ReadUShort();
// Number of name records
int numRecords = stream.ReadUShort();
// Offset to start of string storage (from start of table).
storageOffset = stream.ReadUShort();
for (int i = 0; i < numRecords; i++)
{
int platformID = stream.ReadUShort();
int encodingID = stream.ReadUShort();
int languageID = stream.ReadUShort();
int nameID = stream.ReadUShort();
int length = stream.ReadUShort();
int stringOffset = stream.ReadUShort();
// Only interested in name records for Microsoft platform,
// Unicode encoding and US English language.
if (platformID == MicrosoftPlatformID &&
(encodingID == SymbolEncoding || encodingID == UnicodeEncoding) &&
languageID == EnglishAmericanLanguage)
{
switch (nameID)
{
case FamilyNameID:
familyName = ReadString(stream, stringOffset, length);
break;
case FullNameID:
fullName = ReadString(stream, stringOffset, length);
break;
}
if (familyName != String.Empty && fullName != String.Empty)
{
break;
}
}
}
}
/// <summary>
/// Reads the contents of the "kern" table from the current position
/// in the supplied stream.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
// Skip version field
stream.Skip(PrimitiveSizes.UShort);
// Number of subtables
int numTables = stream.ReadUShort();
for (int i = 0; i < numTables; i++) {
// Another pesky version field
stream.Skip(PrimitiveSizes.UShort);
// Length of the subtable, in bytes (including header).
ushort length = stream.ReadUShort();
// Type of information is contained in this table.
ushort coverage = stream.ReadUShort();
// Only interested in horiztonal kerning values in format 0
if ((coverage & HoriztonalMask) == 1 &&
(coverage & MinimumMask) == 0 &&
((coverage >> 8) == 0)) {
// The number of kerning pairs in the table.
int numPairs = stream.ReadUShort();
hasKerningInfo = true;
pairs = new KerningPairs(numPairs);
// Skip pointless shit
stream.Skip(3*PrimitiveSizes.UShort);
for (int j = 0; j < numPairs; j++) {
pairs.Add(
stream.ReadUShort(), // Left glyph index
stream.ReadUShort(), // Right glyph index
stream.ReadFWord()); // Kerning amount
}
}
else {
stream.Skip(length - 3*PrimitiveSizes.UShort);
}
}
}
/// <summary>
/// Reads the contents of the "glyf" table from the current position
/// in the supplied stream.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
GlyphReader builder = new GlyphReader(reader);
foreach (int index in reader.IndexMappings.GlyphIndices) {
Glyph glyph = builder.ReadGlyph(index);
glyphDescriptions[glyph.Index] = glyph;
// Parse child glyphs
if (glyph.IsComposite) {
foreach (int subsetIndex in glyph.Children) {
if (this[subsetIndex] == null) {
int glyphIndex = reader.IndexMappings.GetGlyphIndex(subsetIndex);
this[subsetIndex] = builder.ReadGlyph(glyphIndex);
}
}
}
}
}
/// <summary>
/// Reads the contents of the "head" table from the current position
/// in the supplied stream.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
versionNo = stream.ReadFixed();
fontRevision = stream.ReadFixed();
checkSumAdjustment = stream.ReadULong();
magicNumber = stream.ReadULong();
flags = stream.ReadUShort();
unitsPermEm = stream.ReadUShort();
// Some fonts have dodgy date offsets that cause AddSeconds to throw an exception
createDate = GetDate(stream.ReadLongDateTime());
updateDate = GetDate(stream.ReadLongDateTime());
xMin = stream.ReadShort();
yMin = stream.ReadShort();
xMax = stream.ReadShort();
yMax = stream.ReadShort();
macStyle = stream.ReadUShort();
lowestRecPPEM = stream.ReadUShort();
fontDirectionHint = stream.ReadShort();
indexToLocFormat = stream.ReadShort();
glyphDataFormat = stream.ReadShort();
}
/// <summary>
/// Reads the contents of the "name" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
// Ignore format selector field
stream.ReadUShort();
// Number of name records
int numRecords = stream.ReadUShort();
// Offset to start of string storage (from start of table).
storageOffset = stream.ReadUShort();
for (int i = 0; i < numRecords; i++) {
int platformID = stream.ReadUShort();
int encodingID = stream.ReadUShort();
int languageID = stream.ReadUShort();
int nameID = stream.ReadUShort();
int length = stream.ReadUShort();
int stringOffset = stream.ReadUShort();
// Only interested in name records for Microsoft platform,
// Unicode encoding and US English language.
if (platformID == MicrosoftPlatformID &&
(encodingID == SymbolEncoding || encodingID == UnicodeEncoding) &&
languageID == EnglishAmericanLanguage) {
switch (nameID) {
case FamilyNameID:
familyName = ReadString(stream, stringOffset, length);
break;
case FullNameID:
fullName = ReadString(stream, stringOffset, length);
break;
}
if (familyName != String.Empty && fullName != String.Empty) {
break;
}
}
}
}
/// <summary>
/// Reads the contents of the "hhea" table from the current position
/// in the supplied stream.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
versionNo = stream.ReadFixed();
ascender = stream.ReadFWord();
decender = stream.ReadFWord();
lineGap = stream.ReadFWord();
advanceWidthMax = stream.ReadUFWord();
minLeftSideBearing = stream.ReadFWord();
minRightSideBearing = stream.ReadFWord();
xMaxExtent = stream.ReadFWord();
caretSlopeRise = stream.ReadShort();
caretSlopeRun = stream.ReadShort();
caretOffset = stream.ReadShort();
stream.ReadShort();
stream.ReadShort();
stream.ReadShort();
stream.ReadShort();
metricDataFormat = stream.ReadShort();
numberOfHMetrics = stream.ReadUShort();
}
internal GdiFontMetrics(GdiDeviceContent dc, GdiFont currentFont) {
if (dc.Handle == IntPtr.Zero) {
throw new ArgumentNullException("dc", "Handle to device context cannot be null");
}
if (dc.GetCurrentObject(GdiDcObject.Font) == IntPtr.Zero) {
throw new ArgumentException("dc", "No font selected into supplied device context");
}
this.dc = dc;
this.currentFont = currentFont;
// FontFileReader requires the font facename because the font may exist in
// a TrueType collection.
StringBuilder builder = new StringBuilder(255);
LibWrapper.GetTextFace(dc.Handle, builder.Capacity, builder);
faceName = builder.ToString();
ranges = new GdiUnicodeRanges(dc);
reader = new FontFileReader(new MemoryStream(GetFontData()), faceName);
converter = new PdfUnitConverter(EmSquare);
// After we have cached the font data, we can safely delete the resource
currentFont.Dispose();
}
/// <summary>
/// Reads the contents of the "head" table from the current position
/// in the supplied stream.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
versionNo = stream.ReadFixed();
fontRevision = stream.ReadFixed();
checkSumAdjustment = stream.ReadULong();
magicNumber = stream.ReadULong();
flags = stream.ReadUShort();
unitsPermEm = stream.ReadUShort();
// Some fonts have dodgy date offsets that cause AddSeconds to throw an exception
createDate = GetDate(stream.ReadLongDateTime());
updateDate = GetDate(stream.ReadLongDateTime());
xMin = stream.ReadShort();
yMin = stream.ReadShort();
xMax = stream.ReadShort();
yMax = stream.ReadShort();
macStyle = stream.ReadUShort();
lowestRecPPEM = stream.ReadUShort();
fontDirectionHint = stream.ReadShort();
indexToLocFormat = stream.ReadShort();
glyphDataFormat = stream.ReadShort();
}
/// <summary>
/// Reads the contents of the "glyf" table from the current position
/// in the supplied stream.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
GlyphReader builder = new GlyphReader(reader);
foreach (int index in reader.IndexMappings.GlyphIndices)
{
Glyph glyph = builder.ReadGlyph(index);
glyphDescriptions[glyph.Index] = glyph;
// Parse child glyphs
if (glyph.IsComposite)
{
foreach (int subsetIndex in glyph.Children)
{
if (this[subsetIndex] == null)
{
int glyphIndex = reader.IndexMappings.GetGlyphIndex(subsetIndex);
this[subsetIndex] = builder.ReadGlyph(glyphIndex);
}
}
}
}
}
/// <summary>
/// Reads the contents of the "os/2" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
version = stream.ReadUShort();
avgCharWidth = stream.ReadShort();
usWeightClass = stream.ReadUShort();
usWidthClass = stream.ReadUShort();
// According to the OpenType spec, bit 0 must be zero.
fsType = (ushort) (stream.ReadUShort() & ~1);
subscriptXSize = stream.ReadShort();
subscriptYSize = stream.ReadShort();
subscriptXOffset = stream.ReadShort();
subscriptYOffset = stream.ReadShort();
superscriptXSize = stream.ReadShort();
superscriptYSize = stream.ReadShort();
superscriptXOffset = stream.ReadShort();
superscriptYOffset = stream.ReadShort();
strikeoutSize = stream.ReadShort();
strikeoutPosition = stream.ReadShort();
short familyClass = stream.ReadShort();
classID = (byte) (familyClass >> 8);
subclassID = (byte) (familyClass & 255);
stream.Read(panose, 0, panose.Length);
unicodeRange1 = stream.ReadULong();
unicodeRange2 = stream.ReadULong();
unicodeRange3 = stream.ReadULong();
unicodeRange4 = stream.ReadULong();
vendorID[0] = stream.ReadChar();
vendorID[1] = stream.ReadChar();
vendorID[2] = stream.ReadChar();
vendorID[3] = stream.ReadChar();
fsSelection = stream.ReadUShort();
usFirstCharIndex = stream.ReadUShort();
usLastCharIndex = stream.ReadUShort();
typoAscender = stream.ReadShort();
typoDescender = stream.ReadShort();
typoLineGap = stream.ReadShort();
usWinAscent = stream.ReadUShort();
usWinDescent = stream.ReadUShort();
codePageRange1 = stream.ReadULong();
codePageRange2 = stream.ReadULong();
sxHeight = stream.ReadShort();
sCapHeight = stream.ReadShort();
usDefaultChar = stream.ReadUShort();
usBreakChar = stream.ReadUShort();
usMaxContext = stream.ReadUShort();
}
/// <summary>
/// Gets an instance of an <see cref="FontTable"/> implementation that is
/// capable of parsing the table identified by <b>tab</b>.
/// </summary>
/// <returns></returns>
internal FontTable MakeTable(FontFileReader reader) {
return FontTableFactory.Make(TableName, reader);
}
/// <summary>
/// Reads the contents of the "hhea" table from the current position
/// in the supplied stream.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
versionNo = stream.ReadFixed();
ascender = stream.ReadFWord();
decender = stream.ReadFWord();
lineGap = stream.ReadFWord();
advanceWidthMax = stream.ReadUFWord();
minLeftSideBearing = stream.ReadFWord();
minRightSideBearing = stream.ReadFWord();
xMaxExtent = stream.ReadFWord();
caretSlopeRise = stream.ReadShort();
caretSlopeRun = stream.ReadShort();
caretOffset = stream.ReadShort();
// TODO: Check these 4 fields are all 0
stream.ReadShort();
stream.ReadShort();
stream.ReadShort();
stream.ReadShort();
metricDataFormat = stream.ReadShort();
numberOfHMetrics = stream.ReadUShort();
}
/// <summary>
/// Reads the contents of the "maxp" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
// These two fields are common to versions 0.5 and 1.0
versionNo = stream.ReadFixed();
numGlyphs = stream.ReadUShort();
// Version 1.0 of this table contains more data
if (versionNo == 0x00010000) {
maxPoints = stream.ReadUShort();
maxContours = stream.ReadUShort();
maxCompositePoints = stream.ReadUShort();
maxCompositeContours = stream.ReadUShort();
maxZones = stream.ReadUShort();
maxTwilightPoints = stream.ReadUShort();
maxStorage = stream.ReadUShort();
maxFunctionDefs = stream.ReadUShort();
maxInstructionDefs = stream.ReadUShort();
maxStackElements = stream.ReadUShort();
maxSizeOfInstructions = stream.ReadUShort();
maxComponentElements = stream.ReadUShort();
maxComponentDepth = stream.ReadUShort();
}
}
/// <summary>
/// Creates a new instance of the FontSubset class.
/// </summary>
/// <param name="reader">TrueType font parser.</param>
public FontSubset(FontFileReader reader) {
this.reader = reader;
}
/// <summary>
/// Gets an instance of an <see cref="FontTable"/> implementation that is
/// capable of parsing the table identified by <b>tab</b>.
/// </summary>
/// <returns></returns>
internal FontTable MakeTable(FontFileReader reader)
{
return(FontTableFactory.Make(TableName, reader));
}
/// <summary>
/// Reads the contents of the "post" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader) {
FontFileStream stream = reader.Stream;
version = stream.ReadFixed();
// The italic angle is stored in the stupid fixed field format.
italicAngle = (float) stream.ReadFixed()/65536.0f;
underlinePosition = stream.ReadFWord();
underlineThickness = stream.ReadFWord();
fixedPitch = stream.ReadULong();
minMemType42 = stream.ReadULong();
maxMemType42 = stream.ReadULong();
minMemType1 = stream.ReadULong();
maxMemType1 = stream.ReadULong();
}
/// <summary> /// Reads the contents of a table from the current position in /// the supplied stream. /// </summary> /// <param name="reader"></param> /// <exception cref="ArgumentException"> /// If the supplied stream does not contain enough data. /// </exception> protected internal abstract void Read(FontFileReader reader);
/// <summary> /// Reads the contents of a table from the current position in /// the supplied stream. /// </summary> /// <param name="reader"></param> /// <exception cref="ArgumentException"> /// If the supplied stream does not contain enough data. /// </exception> protected internal abstract void Read(FontFileReader reader);
/// <summary>
/// Creates a new instance of the FontSubset class.
/// </summary>
/// <param name="reader">TrueType font parser.</param>
public FontSubset(FontFileReader reader)
{
this.reader = reader;
}