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Extract correct PDF format version from the catalog

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The 'Version' field of the most recent document catalog, if present, is
intended to supersede the value in the file prologue.

This is significant for incrementally-built PDF documents and generators that
emit a low version in the prologue and later apply a format version based on
PDF features used, such as Apple's CoreGraphics/Quartz PDF backend.

Fixes the internal version variable, as well as the PDFFormatVersion reported
by the API and consumed by viewers.
This commit is contained in:
Mike Corbin 2015-05-25 03:45:20 +01:00
parent 82536f8fa6
commit 4c9b65f0e1
3 changed files with 9 additions and 2 deletions
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10
src/core/core.js
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@ -343,6 +343,10 @@ var PDFDocument = (function PDFDocumentClosure() {
PDFDocument.prototype = {
parse: function PDFDocument_parse(recoveryMode) {
this.setup(recoveryMode);
var version = this.catalog.catDict.get('Version');
if (isName(version)) {
this.pdfFormatVersion = version.name;
}
try {
// checking if AcroForm is present
this.acroForm = this.catalog.catDict.get('AcroForm');
@ -444,8 +448,10 @@ var PDFDocument = (function PDFDocumentClosure() {
}
version += String.fromCharCode(ch);
}
// removing "%PDF-"-prefix
this.pdfFormatVersion = version.substring(5);
if (!this.pdfFormatVersion) {
// removing "%PDF-"-prefix
this.pdfFormatVersion = version.substring(5);
}
return;
}
// May not be a PDF file, continue anyway.