#cairo_pdf_version_t is used to describe the version number of the PDF specification that a generated PDF file will conform to.
The version 1.4 of the PDF specification. (Since 1.10)
The version 1.5 of the PDF specification. (Since 1.10)
The version 1.6 of the PDF specification. (Since 1.18)
The version 1.7 of the PDF specification. (Since 1.18)
#cairo_pdf_version_t is used to describe the version number of the PDF specification that a generated PDF file will conform to.