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Tilman,
On 3/3/19 08:48, Tilman Hausherr wrote:
>> I have no idea. The information about PDFBox seems to be mostly
>> in example programs and not web-based documentation. Searching
>> e.g. Google for "how to use FontBox with PDFBox" generally comes
>> up with references into the Javadoc for "uses of FontBox
>> interface".
>>
>> The Javadoc does not describe what FontBox is and none of the
>> classes or subclasses in those related packages really have any
>> documentation worth reading. Each class "foo" is described as
>> "being a foo" and each "getBar" method is described as "gets the
>> bar for the foo".
>>
>> So... discoverability of features is pretty much nil here.
>>
>> I'm quite happy with the responses I get on this mailing list,
>> but it's nearly impossible to discover on my own what is
>> possible, here. I shouldn't have to get you guys to tell me how
>> to use the software... you have better things to do (like
>> continue to write great software).
>>
>> Is there a good example of using FontBox with PDFBox in order to
>> subset a font?
>
> Yes, the EmbeddedFonts.java example.
I don't see any use of FontBox in the EmbeddedFonts.java example. Am I
missing something?
> We are a small team and don't have the time to write tutorials.
> There are many working examples and also many answers on
> stackoverflow.
Understood.
> You don't need fontbox unless for advanced things, e.g. reuse a
> font for several files. For normal use cases, fontbox remains under
> the hood.
>
> If you think some class documentation is useless, name it, and I'll
> see if it can be improved.
:)
It's less of a presence of useless documentation and more of a lack of
existing documentation. I can file some tickets if you think it would
be helpful. I also don't mind writing documentation and/or tutorials
for the project.
> The subset thing is done by PDFBox without you having to bother
> about it. It's "not subsetting" that would require more parameters.
> So you need only this:
>
> PDType0Font font = PDType0Font.load(document, new
> File("c:/windows/fonts/arial.ttf")); stream.setFont(font, 12);
> stream.showText("...");
Okay, that's exactly what we are doing (well... we are loading the
font via the ClassLoader, but ...). And it's working. I was just a
little worried about the ballooning file size. I realize there is
little to be done about that at this stage.
At this point, I am basically doing this:
[ When adding text to the document ]
- - If the text contains anything outside of the ANSI encoding
- then replace the usual (default) font with the ARIALUNI.TTF
It operates on a per-text-string basis, so it should only change the
font for a single piece of text that requires it. I'm starting to
think that I should not bother scanning the text and instead use the
IllegalArgumentException as flow-control -- which I still don't like.
But it means that my code will not spend a ton of time repeating
checks that PDFBox will end up doing, anyway.
I'm a little worried about what I will do the next time I have an
issue like this -- where the ARIALUNI.TTF font doesn't include some
character that I need... since there's no way to probe a font for
support for a code point, I can't map code-points to fonts in a
scalable way. It will just be trial-and-error which is no fun.
It also means that I need to have some kind of set of fonts that we
just round-robin through, hoping we get a hit and we can continue...
otherwise we just have to fail (like we do now).
- -chris
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