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Cache the "raw" standard font data in the worker-thread (PR 12726 follow-up)

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*This implementation is basically a copy of the pre-existing `builtInCMapCache` implementation.*

For some, badly generated, PDF documents it's possible that we'll end up having to fetch the *same* standard font data over and over (which is obviously inefficient).
While not common, it's certainly possible that a PDF document uses *custom* font names where the actual font then references one of the standard fonts; see e.g. issue 11399 for one such example.

Note that I did suggest adding worker-thread caching of standard font data in PR 12726, however it wasn't deemed necessary at the time. Now that we have a real-world example that benefit from caching, I think that we should simply implement this now.
This commit is contained in:
Jonas Jenwald 2021-06-08 13:58:52 +02:00
parent 6d88d8cdaa
commit a01c599247
4 changed files with 46 additions and 17 deletions
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8
src/core/document.js
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@ -79,6 +79,7 @@ class Page {
globalIdFactory,
fontCache,
builtInCMapCache,
standardFontDataCache,
globalImageCache,
nonBlendModesSet,
xfaFactory,
@ -90,6 +91,7 @@ class Page {
this.ref = ref;
this.fontCache = fontCache;
this.builtInCMapCache = builtInCMapCache;
this.standardFontDataCache = standardFontDataCache;
this.globalImageCache = globalImageCache;
this.nonBlendModesSet = nonBlendModesSet;
this.evaluatorOptions = pdfManager.evaluatorOptions;
@ -255,6 +257,7 @@ class Page {
idFactory: this._localIdFactory,
fontCache: this.fontCache,
builtInCMapCache: this.builtInCMapCache,
standardFontDataCache: this.standardFontDataCache,
globalImageCache: this.globalImageCache,
options: this.evaluatorOptions,
});
@ -321,6 +324,7 @@ class Page {
idFactory: this._localIdFactory,
fontCache: this.fontCache,
builtInCMapCache: this.builtInCMapCache,
standardFontDataCache: this.standardFontDataCache,
globalImageCache: this.globalImageCache,
options: this.evaluatorOptions,
});
@ -425,6 +429,7 @@ class Page {
idFactory: this._localIdFactory,
fontCache: this.fontCache,
builtInCMapCache: this.builtInCMapCache,
standardFontDataCache: this.standardFontDataCache,
globalImageCache: this.globalImageCache,
options: this.evaluatorOptions,
});
@ -889,6 +894,7 @@ class PDFDocument {
idFactory: this._globalIdFactory,
fontCache: this.catalog.fontCache,
builtInCMapCache: this.catalog.builtInCMapCache,
standardFontDataCache: this.catalog.standardFontDataCache,
options,
});
const operatorList = new OperatorList();
@ -1148,6 +1154,7 @@ class PDFDocument {
globalIdFactory: this._globalIdFactory,
fontCache: catalog.fontCache,
builtInCMapCache: catalog.builtInCMapCache,
standardFontDataCache: catalog.standardFontDataCache,
globalImageCache: catalog.globalImageCache,
nonBlendModesSet: catalog.nonBlendModesSet,
xfaFactory: this.xfaFactory,
@ -1170,6 +1177,7 @@ class PDFDocument {
globalIdFactory: this._globalIdFactory,
fontCache: catalog.fontCache,
builtInCMapCache: catalog.builtInCMapCache,
standardFontDataCache: catalog.standardFontDataCache,
globalImageCache: catalog.globalImageCache,
nonBlendModesSet: catalog.nonBlendModesSet,
xfaFactory: null,