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Ignore the /Mask entry in images unless its /ImageMask entry is explicitly set to true (issue 6621)

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Fixes 6621.
This commit is contained in:
Jonas Jenwald 2015-11-12 21:41:16 +01:00
parent 9455095ee9
commit 50a70429ec
4 changed files with 14 additions and 1 deletions
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7
src/core/image.js
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@ -140,7 +140,12 @@ var PDFImage = (function PDFImageClosure() {
this.smask = new PDFImage(xref, res, smask, false);
} else if (mask) {
if (isStream(mask)) {
this.mask = new PDFImage(xref, res, mask, false, null, null, true);
var maskDict = mask.dict, imageMask = maskDict.get('ImageMask', 'IM');
if (!imageMask) {
warn('Ignoring /Mask in image without /ImageMask.');
} else {
this.mask = new PDFImage(xref, res, mask, false, null, null, true);
}
} else {
// Color key mask (just an array).
this.mask = mask;