pdfSetPSHonorUserUnit
Control use of the UserUnit setting.
void pdfSetPSHonorUserUnit(PDFHandle pdf, int userUnit)
If
userUnit is 1, tells XpdfPS to honor the UserUnit
setting on PDF pages when computing page/paper size.
If userUnit is 0 (the default), the UserUnit settings are
ignored.
C:
pdfSetPSHonorUserUnit(pdf, 1);