[poppler] Patch in progress - looking for annotation related unit test data

[Patrick Golden]

Hi Tobias,

Author of the email you cited, here. Also note that there is an open bug 
on the tracker to add individual annotation rendering to the glib 
bindings [1]. I've been patching libpoppler locally in my own project 
using something very much like the code in there [2].

For my own purposes, I've been developing a series of annotation test 
cases using various PDF readers, including Evince, iAnnotate (an iOS 
application), and PDF Studio Pro (a JDK application). The latter two are 
not free, but I would be happy to generate more examples using things 
like stamps, lines, shapes, and ink.

[1] https://bugs.freedesktop.org/show_bug.cgi?id=83643
[2] 
https://github.com/ptgolden/pdf2oac-js/blob/775c86b317c244bb0996f911fadca546b4545d5f/libpoppler/patches/0001-Add-poppler_annot_render.patch



On 02/16/2018 05:24 AM, Tobias Deiminger wrote:

> Do you have PDF document(s) around that contain various types of 
> annotations, for the sake of unit testing? (already checked 
> git://git.freedesktop.org/git/poppler/test, no hit)
> 
> I'm asking because I'm working on a poppler patch and wanted to add unit 
> tests before submitting it on bugzilla. The patch will add support for 
> rendering individual annotations (as requested in [1]). The first 
> version will have a QT5 API as
> 
> QImage Poppler::Annotation::renderToImage(double hDPI, double vDPI)
> 
> An obvious way to test this would be to render annotations from a test 
> document and compare the resulting QImages with golden bitmaps. Do you 
> think such a test will be maintainable? Rendering results might slightly 
> change with algorithm evolution in splash/arthur/cairo versions, so the 
> golden bitmap could need updates from time to time.
> 
> If I had to create test documents on my own, which authoring tools would 
> you use? There's
> -Poppler of course, but it lacks some annotation related features like 
> saving appearance streams for self-created annotations into the PDF
> -Adobe tools are often considered as reference, but I had to buy them first
> -maybe the pdfcomment TeX package? No idea how complete the standard is 
> implemented there...
> 
> Best
> Tobias
> 
> [1] https://lists.freedesktop.org/archives/poppler/2017-April/012165.html
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