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handle extraneous def token in some dictionaries and skip returning glyph bounds if not in font

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This commit is contained in:
Eliot Jones
2019-05-19 13:27:38 +01:00
parent e9e376c52a
commit 31d12eb731
4 changed files with 21 additions and 12 deletions
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2
src/UglyToad.PdfPig.Tests/Fonts/Type1/Type1FontParserTests.cs
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@@ -63,7 +63,7 @@
var builder = new StringBuilder("<!DOCTYPE html><html><head></head><body>");
foreach (var charString in result.CharStrings.CharStrings)
{
var path = result.CharStrings.Generate(charString.Key);
Assert.True(result.CharStrings.TryGenerate(charString.Key, out var path));
builder.AppendLine(path.ToFullSvg());
}

16
src/UglyToad.PdfPig/Fonts/Type1/CharStrings/Type1CharStrings.cs
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@@ -25,27 +25,27 @@
Subroutines = subroutines ?? throw new ArgumentNullException(nameof(subroutines));
}
public PdfPath Generate(string name)
public bool TryGenerate(string name, out PdfPath path)
{
PdfPath glyph;
path = default(PdfPath);
lock (locker)
{
if (glyphs.TryGetValue(name, out var result))
if (glyphs.TryGetValue(name, out path))
{
return result;
return true;
}
if (!CharStrings.TryGetValue(name, out var sequence))
{
throw new InvalidOperationException($"No charstring sequence with the name /{name} in this font.");
return false;
}
glyph = Run(sequence);
path = Run(sequence);
glyphs[name] = glyph;
glyphs[name] = path;
}
return glyph;
return true;
}
private PdfPath Run(CommandSequence sequence)

9
src/UglyToad.PdfPig/Fonts/Type1/Type1FontProgram.cs
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@@ -2,7 +2,6 @@
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using CharStrings;
using Core;
using Geometry;
@@ -62,7 +61,11 @@
public PdfRectangle? GetCharacterBoundingBox(string characterName)
{
var glyph = CharStrings.Generate(characterName);
if (!CharStrings.TryGenerate(characterName, out var glyph))
{
return null;
}
var bbox = glyph.GetBoundingRectangle();
return bbox;
@@ -77,7 +80,7 @@
{
if (FontMatrix == null || FontMatrix.Data.Count != 6)
{
return TransformationMatrix.FromValues(0.001m, 0, 0, 0.001m, 0, 0);;
return TransformationMatrix.FromValues(0.001m, 0, 0, 0.001m, 0, 0);
}
var a = ((NumericToken) FontMatrix.Data[0]).Data;

6
src/UglyToad.PdfPig/Tokenization/DictionaryTokenizer.cs
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@@ -94,6 +94,12 @@
result[key] = token;
}
// skip def.
if (PeekNext(tokens, i) == OperatorToken.Def)
{
i++;
}
key = null;
}