Hello,
I looked at the areas suggested by John and found that the font didn't had a
font descriptor.
So after creating and setting a font descriptor I copied the widths from the
loaded ttf file with the same name.
List<PDPage> allPages = doc.getDocumentCatalog().getAllPages();
for (PDPage page : allPages) {
PDResources pageResources = page.findResources();
Map<String, PDFont> fonts = pageResources.getFonts();
for (PDFont font : fonts.values()) {
assert font.getFontDescriptor() == null; // font descriptor is null
PDFontDescriptorDictionary fdDictionary = new
PDFontDescriptorDictionary();
font.setFontDescriptor(fdDictionary);
List<Float> widths = font.getWidths(); // is null
//loading same font and apply widths
InputStream isNimbus =
getClass().getResourceAsStream("/NimbusSanL-Regu.ttf");
PDTrueTypeFont ttf = PDTrueTypeFont.loadTTF(doc, isNimbus);
List<Float> newWidths = ttf.getWidths();//[278.0, 278.0, 355.0, 556.0,
556.0, 889.0, 667.0, 191.0, 333.0, 333.0, 389.0, 584.0,
font.setWidths(newWidths);
}
}
when I opened the pdf acrobat complained that the font NimbusSanL-Regu could
not be loaded. All the characters were dotted.
Then I replaced the font in pageResources with the loaded ttf and added under
the same key. But that didn't work as well.
Any ideas, how I can recalculate the widths from the given font. Was it a
problem that the font in the pdf is marked as Typ0 and the font with the same
name is of type3?
This is the cos object of the given Font.
Font COS object.
COSDictionary{(COSName{Type}:COSName{Font}) (COSName{Subtype}:COSName{Type0})
(COSName{BaseFont}:COSName{NimbusSanL-Regu})
(COSName{Encoding}:COSName{Identity-H})
(COSName{DescendantFonts}:COSArray{[COSObject{26, 0}]})
(COSName{ToUnicode}:COSDictionary{(COSName{Length}:COSInt{791}) }) }
Best regards,
Vadimo
> Am 16.11.2014 um 20:07 schrieb John Hewson <[email protected]>:
>
> Hi Vadimo
>
> This error means that the Widths in the embedded font file don’t match the
> widths in the FontDescriptor. You’ll need to update whichever is wrong,
> however PDFBox can’t edit fonts so you can only use it to update the
> FontDescriptor width, which may or may not be what you want. The Widths
> specifies the width of each glyph and can be found at:
>
> Page -> Resources -> Font -> FontDescriptor -> Widths
>
> The manner in which fonts are embedded in PDF is very complex, and this kind
> of repair will require that you have a good understanding of the relevant
> concepts from the ISO 32000 PDF specification. PDFBox provides the low-level
> APIs which you need, but you need to understand PDF in order to use them.
>
> Thanks
>
> -- John
>
>> On 16 Nov 2014, at 08:02, Vadim Bauer <[email protected]> wrote:
>>
>> Hi,
>>
>> I have a PDFA where Adobe preflight says 'Width information for rendered
>> glyphs is inconsistent'
>> I would like to correct that with PDFBox as the PDFs in question has only
>> this one error.
>>
>> As I understand I need to get all the text characters(Strings?) in the PDF
>> and set/(modify or recalculate?).
>>
>>
>> Question is how can I achieve this with PDFBox, can someone give me hints
>> maybe in pseudo code.
>> Currently I am browsing the code but I am quite lost on where to dig.
>>
>>
>> Cheers,
>> Vadimo
>
