Provided by: libfontconfig-doc_2.13.1-4.4ubuntu1_all bug

NAME

       FcMatrixRotate - Rotate a matrix

SYNOPSIS

       #include <fontconfig/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