/**
* This will parse a single CharMetric object from the stream.
*
* @return The next char metric input the stream.
*
* @throws IOException If there is an error reading from the stream.
*/
private CharMetric ParseCharMetric()
{
CharMetric charMetric = new CharMetric();
string metrics = ReadLine();
var metricsTokenizer = metrics.Split(new char[] { ' ' });
try
{
for (int i = 0; i < metricsTokenizer.Length;)
{
string nextCommand = metricsTokenizer[i++];
switch (nextCommand)
{
case CHARMETRICS_C:
string charCodeC = metricsTokenizer[i++];
charMetric.CharacterCode = int.Parse(charCodeC);
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_CH:
//Is the hex string <FF> or FF, the spec is a little
//unclear, wait and see if it breaks anything.
string charCodeCH = metricsTokenizer[i++];
charMetric.CharacterCode = Convert.ToInt32(charCodeCH, BITS_IN_HEX);
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_WX:
charMetric.Wx = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_W0X:
charMetric.W0x = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_W1X:
charMetric.W1x = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_WY:
charMetric.Wy = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_W0Y:
charMetric.W0y = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_W1Y:
charMetric.W1y = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_W:
float[] w = new float[2];
w[0] = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
w[1] = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
charMetric.W = w;
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_W0:
float[] w0 = new float[2];
w0[0] = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
w0[1] = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
charMetric.W0 = w0;
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_W1:
float[] w1 = new float[2];
w1[0] = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
w1[1] = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
charMetric.W1 = w1;
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_VV:
float[] vv = new float[2];
vv[0] = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
vv[1] = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
charMetric.Vv = vv;
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_N:
charMetric.Name = metricsTokenizer[i++];
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_B:
var box = new SKRect();
box.Left = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
box.Bottom = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
box.Right = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
box.Top = float.Parse(metricsTokenizer[i++], CultureInfo.InvariantCulture);
charMetric.BoundingBox = box;
VerifySemicolon(metricsTokenizer, ref i);
break;
case CHARMETRICS_L:
Ligature lig = new Ligature();
lig.Successor = metricsTokenizer[i++];
lig.LigatureValue = metricsTokenizer[i++];
charMetric.AddLigature(lig);
VerifySemicolon(metricsTokenizer, ref i);
break;
default:
throw new IOException("Unknown CharMetrics command '" + nextCommand + "'");
}
}
}
catch (Exception e)
{
throw new IOException("Error: Corrupt AFM document:" + e);
}
return(charMetric);
}
/**
* This will parse a font metrics item.
*
* @return The parse font metrics item.
*
* @throws IOException If there is an error reading the AFM file.
*/
private FontMetrics ParseFontMetric(bool reducedDataset)
{
FontMetrics fontMetrics = new FontMetrics();
string startFontMetrics = ReadString();
if (!START_FONT_METRICS.Equals(startFontMetrics, StringComparison.Ordinal))
{
throw new IOException("Error: The AFM file should start with " + START_FONT_METRICS +
" and not '" + startFontMetrics + "'");
}
fontMetrics.AFMVersion = Readfloat();
string nextCommand;
bool charMetricsRead = false;
while (!END_FONT_METRICS.Equals(nextCommand = ReadString(), StringComparison.Ordinal))
{
switch (nextCommand)
{
case FONT_NAME:
fontMetrics.FontName = ReadLine();
break;
case FULL_NAME:
fontMetrics.FullName = ReadLine();
break;
case FAMILY_NAME:
fontMetrics.FamilyName = ReadLine();
break;
case WEIGHT:
fontMetrics.Weight = ReadLine();
break;
case FONT_BBOX:
var bBox = new SKRect();
bBox.Left = Readfloat();
bBox.Bottom = Readfloat();
bBox.Right = Readfloat();
bBox.Top = Readfloat();
fontMetrics.FontBBox = bBox;
break;
case VERSION:
fontMetrics.FontVersion = ReadLine();
break;
case NOTICE:
fontMetrics.Notice = ReadLine();
break;
case ENCODING_SCHEME:
fontMetrics.EncodingScheme = ReadLine();
break;
case MAPPING_SCHEME:
fontMetrics.MappingScheme = ReadInt();
break;
case ESC_CHAR:
fontMetrics.EscChar = ReadInt();
break;
case CHARACTER_SET:
fontMetrics.CharacterSet = ReadLine();
break;
case CHARACTERS:
fontMetrics.Characters = ReadInt();
break;
case IS_BASE_FONT:
fontMetrics.IsBaseFont = ReadBoolean();
break;
case V_VECTOR:
float[] vector = new float[2];
vector[0] = Readfloat();
vector[1] = Readfloat();
fontMetrics.VVector = vector;
break;
case IS_FIXED_V:
fontMetrics.IsFixedV = ReadBoolean();
break;
case CAP_HEIGHT:
fontMetrics.CapHeight = Readfloat();
break;
case X_HEIGHT:
fontMetrics.XHeight = Readfloat();
break;
case ASCENDER:
fontMetrics.Ascender = Readfloat();
break;
case DESCENDER:
fontMetrics.Descender = Readfloat();
break;
case STD_HW:
fontMetrics.StandardHorizontalWidth = Readfloat();
break;
case STD_VW:
fontMetrics.StandardVerticalWidth = Readfloat();
break;
case COMMENT:
fontMetrics.AddComment(ReadLine());
break;
case UNDERLINE_POSITION:
fontMetrics.UnderlinePosition = Readfloat();
break;
case UNDERLINE_THICKNESS:
fontMetrics.UnderlineThickness = Readfloat();
break;
case ITALIC_ANGLE:
fontMetrics.ItalicAngle = Readfloat();
break;
case CHAR_WIDTH:
float[] widths = new float[2];
widths[0] = Readfloat();
widths[1] = Readfloat();
fontMetrics.CharWidth = widths;
break;
case IS_FIXED_PITCH:
fontMetrics.IsFixedPitch = ReadBoolean();
break;
case START_CHAR_METRICS:
int countMetrics = ReadInt();
List <CharMetric> charMetrics = new List <CharMetric>(countMetrics);
for (int i = 0; i < countMetrics; i++)
{
CharMetric charMetric = ParseCharMetric();
charMetrics.Add(charMetric);
}
string endCharMetrics = ReadString();
if (!endCharMetrics.Equals(END_CHAR_METRICS, StringComparison.Ordinal))
{
throw new IOException("Error: Expected '" + END_CHAR_METRICS + "' actual '" +
endCharMetrics + "'");
}
charMetricsRead = true;
fontMetrics.CharMetrics = charMetrics;
break;
case START_COMPOSITES:
if (!reducedDataset)
{
int countComposites = ReadInt();
for (int i = 0; i < countComposites; i++)
{
Composite part = ParseComposite();
fontMetrics.AddComposite(part);
}
string endComposites = ReadString();
if (!endComposites.Equals(END_COMPOSITES, StringComparison.Ordinal))
{
throw new IOException("Error: Expected '" + END_COMPOSITES + "' actual '" +
endComposites + "'");
}
}
break;
case START_KERN_DATA:
if (!reducedDataset)
{
ParseKernData(fontMetrics);
}
break;
default:
if (reducedDataset && charMetricsRead)
{
break;
}
throw new IOException("Unknown AFM key '" + nextCommand + "'");
}
}
return(fontMetrics);
}
