tree 5ebbcd07abd93dd3a79731a3d38e8bb56f82e8f2
parent 9b94ee446d9c52a7537e6bc00ffa9bfa7cbb8622
author Shikha Walia <shwali@microsoft.com> 1573005993 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1573005993 +0000

Make FPDFAnnot_SetAP() generate PDF standard compliant AP stream

FPDFAnnot_SetAP() only sets an appearance stream in annotation’s
dictionary and does not create it as a separate XObject.

Other viewers such as Adobe Reader fail to render such annotation as
these readers expect an XObject to be present with the appearance
stream.

This CL modifies FPDFAnnot_SetAP() implementation to create appearance
stream as a XObject following the steps below:
1. Create an indirect PDF stream object.
2. Store appearance stream data in newly created indirect object.
3. Set dictionary values(BBox, Type, SubType) of indirect object.
4. Store a reference to this indirect object in actual annotation
   object's dictionary.

The CL includes a newly added test case to validate creation of
appearance stream as a separate XObject.

Bug: pdfium:1404
Change-Id: I5054cb15ad8bad6ed55f4b952197249a9cc2dfad
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/61430
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>