Am 05.04.2019 um 22:44 schrieb William Pietri:
Hi!
First off, thanks for an excellent library. It's been a pleasure to
work with something where the many mysteries of PDFs are tucked away
behind an easy-to-use interface.
What I'm working on is filling forms. In particular, large forms into
which we sometimes need to put a variety of languages. This has mostly
worked fine, but I've noticed a speed issue. As an example, take the
US I-130: https://www.uscis.gov/system/files_force/files/form/i-130.pdf
If I go through this and fill every field with roman text using the
default font, it takes circa 2 seconds, which is fine. If I fill it
with an added Arabic font, it takes circa 7 seconds. And if I use a
CJK font, it takes circa 140 seconds, which seems like a lot. This is
with PDFBox 2.0.14 and the Oracle 1.8.201 JDK on Linux.
One interesting symptom when I do this is that I see this error
message every time I fill a text field:
Apr 05, 2019 8:16:51 AM
org.apache.pdfbox.pdmodel.font.PDCIDFontType2 <init>
INFO: OpenType Layout tables used in font NotoSansCJKsc-Medium are
not implemented in PDFBox and will be ignored
Apr 05, 2019 8:16:51 AM
org.apache.pdfbox.pdmodel.font.PDCIDFontType2 <init>
INFO: OpenType Layout tables used in font NotoSansCJKsc-Medium are
not implemented in PDFBox and will be ignored
Apr 05, 2019 8:16:52 AM
org.apache.pdfbox.pdmodel.font.PDCIDFontType2 <init>
INFO: OpenType Layout tables used in font NotoSansCJKsc-Medium are
not implemented in PDFBox and will be ignored
That is harmless... these are some very advanced features, e.g. for
Thai, Arabic and Indian fonts.
Could you post some code that takes 140 seconds? And also share the
font, or mention how to get it (I have Windows 7 and 10).
Or does it work when just looping through text fields and then calling
setValue() ? And how did you use a CJK font - did you add a new font to
/Acroform/DR replace the default appearance string in the fields?
Tilman
When I step through this in the debugger, I see the font being cached
in pdmodel.lPDResources.java:155. However, next time through the loop,
the cache is empty, as the PDResources object involved is a different
one. Is that the intended behavior?
Yes, this is a convenience object. Although there is font caching done
in the resource cache (see source code of getDefaultResources())
One thing that might be related is that the default resources for a
form don't seem to be saved even when set. For example, this code:
System.out.println("acroForm.getDefaultResources() = " +
acroForm.getDefaultResources());
System.out.println("acroForm.getDefaultResources() = " +
acroForm.getDefaultResources());
System.out.println("acroForm.getDefaultResources() = " +
acroForm.getDefaultResources());
PDResources defaultResources = acroForm.getDefaultResources();
acroForm.setDefaultResources(defaultResources);
System.out.println("set default resources to " + defaultResources);
System.out.println("acroForm.getDefaultResources() = " +
acroForm.getDefaultResources());
System.out.println("acroForm.getDefaultResources() = " +
acroForm.getDefaultResources());
System.out.println("acroForm.getDefaultResources() = " +
acroForm.getDefaultResources());
will produce this output:
acroForm.getDefaultResources() =
org.apache.pdfbox.pdmodel.PDResources@36d64342
acroForm.getDefaultResources() =
org.apache.pdfbox.pdmodel.PDResources@39ba5a14
acroForm.getDefaultResources() =
org.apache.pdfbox.pdmodel.PDResources@511baa65
set default resources to
org.apache.pdfbox.pdmodel.PDResources@340f438e
acroForm.getDefaultResources() =
org.apache.pdfbox.pdmodel.PDResources@30c7da1e
acroForm.getDefaultResources() =
org.apache.pdfbox.pdmodel.PDResources@5b464ce8
acroForm.getDefaultResources() =
org.apache.pdfbox.pdmodel.PDResources@57829d67
I definitely am new to the code base, but that isn't what I expected.
If this is a bug with the cache, I'm glad to take a swing at fixing
it, but I figured I'd make sure that I wasn't doing something
egregiously wrong first.
Thanks,
William
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