lsm/PdfPig
1
0
Fork 0
mirror of https://github.com/UglyToad/PdfPig.git synced 2025-09-18 18:27:55 +08:00
Code Issues Actions 5 Packages Projects Releases Wiki Activity

handle direct font objects in the resource dictionary

Browse Source 
fonts can appear as dicitionary objects rather than indirect references in the resource dictionary for a page. if we encounter this we parse and store the font by name for retrieval during content parsing.
This commit is contained in:
Eliot Jones
2020-01-27 18:07:51 +00:00
parent 6cf257a331
commit 6292fc256d
1 changed files with 35 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
src/UglyToad.PdfPig/Content/ResourceStore.cs
View File

@@ -16,6 +16,7 @@
private readonly IFontFactory fontFactory;
private readonly Dictionary<IndirectReference, IFont> loadedFonts = new Dictionary<IndirectReference, IFont>();
private readonly Dictionary<NameToken, IFont> loadedDirectFonts = new Dictionary<NameToken, IFont>();
private readonly StackDictionary<NameToken, IndirectReference> currentResourceState = new StackDictionary<NameToken, IndirectReference>();
private readonly Dictionary<NameToken, DictionaryToken> extendedGraphicsStates = new Dictionary<NameToken, DictionaryToken>();
@@ -132,7 +133,31 @@
foreach (var pair in fontDictionary.Data)
{
if (!(pair.Value is IndirectReferenceToken objectKey))
if (pair.Value is IndirectReferenceToken objectKey)
{
var reference = objectKey.Data;
currentResourceState[NameToken.Create(pair.Key)] = reference;
if (loadedFonts.ContainsKey(reference))
{
continue;
}
var fontObject = DirectObjectFinder.Get<DictionaryToken>(objectKey, scanner);
if (fontObject == null)
{
throw new InvalidOperationException($"Could not retrieve the font with name: {pair.Key} which should have been object {objectKey}");
}
loadedFonts[reference] = fontFactory.Get(fontObject, isLenientParsing);
}
else if (pair.Value is DictionaryToken fd)
{
loadedDirectFonts[NameToken.Create(pair.Key)] = fontFactory.Get(fd, isLenientParsing);
}
else
{
if (isLenientParsing)
{
@@ -141,24 +166,6 @@
throw new InvalidOperationException($"The font with name {pair.Key} did not link to an object key. Value was: {pair.Value}.");
}
var reference = objectKey.Data;
currentResourceState[NameToken.Create(pair.Key)] = reference;
if (loadedFonts.ContainsKey(reference))
{
continue;
}
var fontObject = DirectObjectFinder.Get<DictionaryToken>(objectKey, scanner);
if (fontObject == null)
{
throw new InvalidOperationException($"Could not retrieve the font with name: {pair.Key} which should have been object {objectKey}");
}
loadedFonts[reference] = fontFactory.Get(fontObject, isLenientParsing);
}
}
@@ -169,9 +176,15 @@
return lastLoadedFont.font;
}
var reference = currentResourceState[name];
loadedFonts.TryGetValue(reference, out var font);
IFont font;
if (currentResourceState.TryGetValue(name, out var reference))
{
loadedFonts.TryGetValue(reference, out font);
}
else if (!loadedDirectFonts.TryGetValue(name, out font))
{
return null;
}
lastLoadedFont = (name, font);