pdfSetRotation
Set the image rotation.
void pdfSetRotation(PDFHandle pdf, int rotation)
This function sets the image rotation to 0, 90, 180, or 270 degrees,
clockwise. The rotation setting affects all image generation
functions.
The pdfResetBitmapParams
function resets the rotation to its
default value of 0.
C:
pdfSetRotation(pdf, 270);