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pdf/a files must contains special xmp metadata that declares their conformance. so updated the write_metadata

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vididvidid
2025-09-30 04:52:25 +00:00
parent f7db310942
commit 0d1d5413ee
1 changed files with 60 additions and 0 deletions
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60
pdfio-file.c
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@@ -1328,6 +1328,13 @@ pdfioFileSetPermissions(
if (!pdf)
return (false);
if (pdf->pdfa != _PDFIO_PDFA_NONE && encryption != PDFIO_ENCRYPTION_NONE)
{
_pdfioFileError(pdf, "Encryption is not allowed for PDF/A files.");
return (false);
}
if (pdf->num_objs > 3) // First three objects are pages, info, and root
{
_pdfioFileError(pdf, "You must call pdfioFileSetPermissions before adding any objects.");
@@ -2740,6 +2747,59 @@ write_metadata(pdfio_file_t *pdf) // I - PDF file
status &= pdfioStreamPuts(st, " </rdf:Description>\n");
#endif // 0
if (pdf->pdfa != _PDFIO_PDFA_NONE)
{
const char *part = "1"; // Conformance part number
const char *conformance = "B"; // Conformance level
switch (pdf->pdfa)
{
case _PDFIO_PDFA_1A:
conformance = "A";
break;
case _PDFIO_PDFA_1B:
// Default is B
break;
case _PDFIO_PDFA_2A:
part = "2";
conformance = "A";
break;
case _PDFIO_PDFA_2B:
part="2";
break;
case _PDFIO_PDFA_2U:
part = "2";
conformance = "U";
break;
case _PDFIO_PDFA_3A:
part = "3";
conformance = "A";
break;
case _PDFIO_PDFA_3B:
part = "3";
break;
case _PDFIO_PDFA_3U:
part = "3";
conformance = "U";
break;
case _PDFIO_PDFA_4:
part = "4";
conformance = ""; // Conformance level is part of GTS_PDFA4 key
break;
case _PDFIO_PDFA_NONE:
break;
}
status &= pdfioStreamPuts(st, " <rdf:Description rdf:about=\"\" xmlns:pdfaid=\"http://www.aiim.org/pdfa/ns/id/\">\n");
status &= pdfioStreamPrintf(st, " <pdfaid:part>%s</pdfaid:part>\n",part);
if (*conformance)
status &= pdfioStreamPrintf(st, " <pdfaid:conformance>%s</pdfaid:conformance>\n", conformance);
status &= pdfioStreamPuts(st, " </rdf:Description>\n");
}
status &= pdfioStreamPuts(st, " </rdf:RDF>\n");
status &= pdfioStreamPuts(st, "</x:xmpmeta>\n");
status &= pdfioStreamPuts(st, "<?xpacket end=\"r\"?>\n");