fcmatrixrotate(3) debian man page | unix.com

FcMatrixRotate(3)														 FcMatrixRotate(3)

NAME
       FcMatrixRotate - Rotate a matrix

SYNOPSIS
       #include <fontconfig.h>

       void FcMatrixRotate (FcMatrix *matrix, double cos, double sin);

DESCRIPTION
       FcMatrixRotate rotates matrix by the angle who's sine is sin and cosine is cos.	This is done by multiplying by the matrix:

	 cos -sin
	 sin  cos

VERSION
       Fontconfig version 2.9.0

								   16 April 2012						 FcMatrixRotate(3)