DOKK / manpages / debian 10 / libfontconfig1-dev / FcMatrixRotate.3.en
FcMatrixRotate(3) FcMatrixRotate(3)

FcMatrixRotate - Rotate a matrix

#include <fontconfig/fontconfig.h>

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

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
05 November 2018 Fontconfig 2.13.1