None of the graphics state operators described in this section can be used within a
path object. All except those that save and restore the graphics state (q and Q) or set
the CTM (cm) can be included within text objects.
In other words: The q, Q and cm operators must not be included within text objects.
This is what VeraPDF complains about, but (IIRC) this error is so common that until now, it is only considered a warning.
BIRT (as well as obviously a lot of other programs) creates PDF files that are not strictly valid PDF.
The VeraPDF validator shows this as a warning:
Special graphics state operator (cm) inside Text object
The [PDF 1.0 specification](says: https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/pdfreference1.0.pdf) says on page 93:
In other words: The
q,Qandcmoperators must not be included within text objects.This is what VeraPDF complains about, but (IIRC) this error is so common that until now, it is only considered a warning.
I created a solution for this in the (now deleted) tagged-pdf branch. This is available at my fork https://github.com/triestram-partner/birt/tree/tagged-pdf, see 373925c6cae69b95a27b3698d4119465ce7f6619