VAR/VAR.PdfTools
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PdfFont: Character widths

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Valeriano A.R.
2016-06-20 17:10:29 +02:00
parent c4dc8bf9c3
commit d568cbd74b
1 changed files with 41 additions and 0 deletions
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41
VAR.PdfTools/PdfFont.cs
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@@ -14,6 +14,8 @@ namespace VAR.PdfTools
private Dictionary<char, string> _toUnicode = null;
private Dictionary<char, double> _widths = null;
#endregion
#region Properties
@@ -40,6 +42,32 @@ namespace VAR.PdfTools
_toUnicode = parser.ParseToUnicode();
}
if (BaseData.Values.ContainsKey("FirstChar") && baseData.Values.ContainsKey("LastChar") && baseData.Values.ContainsKey("Widths"))
{
double glyphSpaceToTextSpace = 1000.0; // FIXME: SubType:Type3 Uses a FontMatrix that may not correspond to 1/1000th
_widths = new Dictionary<char, double>();
char firstChar = (char)baseData.GetParamAsInt("FirstChar");
char lastChar = (char)baseData.GetParamAsInt("LastChar");
PdfArray widths = baseData.Values["Widths"] as PdfArray;
char actualChar = firstChar;
foreach (IPdfElement elem in widths.Values)
{
PdfReal widthReal = elem as PdfReal;
if (widthReal != null)
{
_widths.Add(actualChar, widthReal.Value / glyphSpaceToTextSpace);
actualChar++;
continue;
}
PdfInteger widthInt = elem as PdfInteger;
if (widthInt != null)
{
_widths.Add(actualChar, widthInt.Value / glyphSpaceToTextSpace);
actualChar++;
continue;
}
}
}
}
#endregion
@@ -62,6 +90,19 @@ namespace VAR.PdfTools
return new string(character, 1);
}
public double GetCharWidth(char character)
{
if (_widths == null)
{
return 0;
}
if (_widths.ContainsKey(character))
{
return _widths[character];
}
return 0;
}
#endregion
}
}