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#6 add debugging code for inspecting svgs of generated cff glyphs fix small bugs

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This commit is contained in:
Eliot Jones
2018-11-17 16:23:17 +00:00
parent 4d18a2478d
commit 936e17b723
5 changed files with 75 additions and 5 deletions
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5
src/UglyToad.PdfPig.Tests/Integration/PigProductionHandbookTests.cs
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@@ -16,7 +16,10 @@
[Fact]
public void CanReadContent()
{
using (var document = PdfDocument.Open(GetFilename()))
using (var document = PdfDocument.Open(GetFilename(), new ParsingOptions
{
UseLenientParsing = false
}))
{
var page = document.GetPage(1);

2
src/UglyToad.PdfPig/Fonts/CompactFontFormat/CharStrings/LazyType2Command.cs
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@@ -42,6 +42,8 @@
public PdfPoint CurrentLocation { get; set; } = new PdfPoint(0, 0);
public decimal? Width { get; set; }
public void AddRelativeHorizontalLine(decimal dx)
{
AddRelativeLine(dx, 0);

2
src/UglyToad.PdfPig/Fonts/CompactFontFormat/CharStrings/Type2CharStringParser.cs
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@@ -332,6 +332,8 @@
ctx.AddRelativeBezierCurve(dx1, dy1, dx2, dy2, 0, dy3);
}
ctx.Stack.Clear();
})
},
{ 27, new LazyType2Command("hhcurveto", ctx =>

61
src/UglyToad.PdfPig/Fonts/CompactFontFormat/CharStrings/Type2CharStrings.cs
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@@ -43,16 +43,69 @@
return glyph;
}
private static CharacterPath Run(CommandSequence sequence)
public static CharacterPath Run(CommandSequence sequence)
{
var context = new Type2BuildCharContext();
var hasRunStackClearingCommand = false;
foreach (var command in sequence.Commands)
{
//command.Match(x => context.Stack.Push(x),
// x => x.Run(context));
command.Match(x => context.Stack.Push(x),
x =>
{
if (!hasRunStackClearingCommand)
{
/*
* The first stack-clearing operator, which must be one of hstem, hstemhm, vstem, vstemhm, cntrmask, hintmask, hmoveto, vmoveto,
* rmoveto, or endchar, takes an additional argument — the width (as described earlier), which may be expressed as zero or one numeric argument.
*/
hasRunStackClearingCommand = true;
switch (x.Name)
{
case "hstem":
case "hstemhm":
case "vstemhm":
case "vstem":
{
var oddArgCount = context.Stack.Length % 2 != 0;
if (oddArgCount)
{
context.Width = context.Stack.PopBottom();
}
break;
}
case "hmoveto":
case "vmoveto":
SetWidthFromArgumentsIfPresent(context, 1);
break;
case "rmoveto":
SetWidthFromArgumentsIfPresent(context, 2);
break;
case "cntrmask":
case "hintmask":
case "endchar:":
SetWidthFromArgumentsIfPresent(context, 0);
break;
default:
hasRunStackClearingCommand = false;
break;
}
}
x.Run(context);
});
}
throw new NotImplementedException();
return context.Path;
}
private static void SetWidthFromArgumentsIfPresent(Type2BuildCharContext context, int expectedArgumentLength)
{
if (context.Stack.Length > expectedArgumentLength)
{
context.Width = context.Stack.PopBottom();
}
}
public class CommandSequence

10
src/UglyToad.PdfPig/Fonts/CompactFontFormat/CompactFontFormatIndividualFontParser.cs
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@@ -2,6 +2,7 @@
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using Charsets;
using CharStrings;
@@ -147,6 +148,15 @@
throw new ArgumentOutOfRangeException($"Unexpected CharString type in CFF font: {topDictionary.CharStringType}.");
}
if (Debugger.IsAttached)
{
foreach (var pair in charStrings.CharStrings)
{
var path = Type2CharStrings.Run(pair.Value);
var svg = path.ToFullSvg();
}
}
return new CompactFontFormatFont(topDictionary, privateDictionary, charset, Union<Type1CharStrings, Type2CharStrings>.Two(charStrings));
}