[PDFBOX-5752] Font errors after copying a page to another document

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.0.1 PDFBox
• Fix Version/s: 3.0.2 PDFBox, 4.0.0
• Component/s: Writing
• Assignee: Andreas Lehmkühler
• Reporter: Christian Haegele
• Created: 16/Jan/24 06:47
• Updated: 14/Mar/24 20:57
• Resolved: 04/Mar/24 06:46

Description

I try to merge import a page into a pdf document and copy the font resources. With PDFBOX 2.0 the code worked perfectly fine, as expected, there is a result document, including the required, embedded fonts. 

Essentially I'm doing this steps in the code, while the first document is one empty page PDF/A, and the second document contains the roboto font, also a PDF/A document. All fonts are embedded.

 

PDDocument targetDoc = Loader.loadPDF(targetDocBytes);
PDPage sourcePage = Loader.loadPDF(data).getPage(0);
final var copiedPage = targetDoc.importPage(sourcePage);
copiedPage.setResources(sourcePage.getResources());

In PDFBOX 3.0 it doesn't seeem to work any more, the document is corrupted if you open it in the Adobe Acrobat. 

It shows a lot of errors, if you open it with the PDFBOX PreflightParser.

Here the error messages of the preflight parser:

1.4 Trailer Syntax error, /XRef cross reference streams are not allowed
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.1.3 Invalid Font definition, BCDFEE+Roboto-Regular: FontFile entry is missing from FontDescriptor
3.1.14 Invalid Font definition, Unknown font type: XML
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.1.8 Invalid Font definition
3.1.2 Invalid Font definition, BCDGEE+TimesNewRomanPS-BoldMT: some mandatory fields are missing from the FontDescriptor: Type, ItalicAngle, FontBBox, Ascent, FontName, StemV, Flags, CapHeight, Descent.
3.1.3 Invalid Font definition, null: FontFile entry is missing from FontDescriptor
3.3.2 Glyph error, invalid font dictionary ==> 

and here the complete test case. I used PDFBox 3.0.1 and the newest snapshot version from 15.01.2024.

 

   @Test
    void importPageWithFonts_validateFontInfo() throws IOException {
        // given
        final var targetDocBytes = IOUtils.toByteArray(PdfUtilitiesTest.class.getClassLoader().getResourceAsStream("empty.pdf"));
        String[] additionalFiles = new String[]{
            "roboto-14.pdf",
        };
        PDDocument targetDoc = Loader.loadPDF(targetDocBytes);

        // when
        for (String fileName : Arrays.asList(additionalFiles)) {
            byte[] data = IOUtils.toByteArray(PdfUtilitiesTest.class.getClassLoader().getResourceAsStream(fileName));
            // verify source is valid
            PDPage sourcePage = Loader.loadPDF(data).getPage(0);
            final var copiedPage = targetDoc.importPage(sourcePage);
            copiedPage.setResources(sourcePage.getResources());
            targetDoc.save(Files.createTempFile("merged-fonts", ".pdf").toFile());
        }
        Path tmpFile = Files.createTempFile("fscd-merged", ".pdf");
        targetDoc.save(tmpFile.toFile(), CompressParameters.DEFAULT_COMPRESSION);

        // then
        // font errors, e.g. Invalid Font definition, BCDFEE+Roboto-Regular: FontFile entry is missing from FontDescriptor
        assertFontsAreValid(tmpFile);
    }
    private static void assertFontsAreValid(Path tmpFile) throws IOException {
        PreflightParser parser = new PreflightParser(tmpFile.toFile());
        final var documentToVerify = (PreflightDocument) parser.parse();
        // Get validation result
        final var result = documentToVerify.validate();
        final var resultString = result.getErrorsList().stream()
            .filter(err -> !err.getErrorCode()
                .matches("7\\.11\\.2|3\\.1\\.11|2\\.1\\.2|2\\.2\\.1|2\\.4\\.3")) // filter findings from the source documents
            .map(err -> err.getErrorCode() + " " + err.getDetails()).collect(Collectors.joining("\n"));
        assertTrue(resultString.isBlank(), resultString);
    }

 

The problem is still present with the snapshot version 3.0.2-2024-0115.083906-63.

 

Here is the output preflight parser output of the snapshot version:

1.4 Trailer Syntax error, /XRef cross reference streams are not allowed
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding
3.3.1 Glyph error, The character code 0 in the font program "BCDEEE+Calibri" is missing from the Character Encoding

 

The input displays correctly:

The output file doesn't display the font correctly:

Issue Links

• fixes: PDFBOX-5775 importPage destroys annotations