[hvgl] Optimize away complex math
Most of the time rotation is zero. It's the same test.
diff --git a/src/hb-aat-var-hvgl-table.cc b/src/hb-aat-var-hvgl-table.cc
index 72e3718..3f02a66 100644
--- a/src/hb-aat-var-hvgl-table.cc
+++ b/src/hb-aat-var-hvgl-table.cc
@@ -290,10 +290,10 @@
hb_transform_t scaled_extremum_transform;
- std::complex<float> t {extremum_translation_delta.x, extremum_translation_delta.y};
- std::complex<float> _1_minus_e_iangle = 1.f - std::exp (std::complex<float> (0, 1) * (float) extremum_rotation_delta);
- if (_1_minus_e_iangle != 0.f)
+ if (extremum_rotation_delta)
{
+ std::complex<float> t {extremum_translation_delta.x, extremum_translation_delta.y};
+ std::complex<float> _1_minus_e_iangle = 1.f - std::exp (std::complex<float> (0, 1) * (float) extremum_rotation_delta);
std::complex<float> eigen = t / _1_minus_e_iangle;
float eigen_x = eigen.real ();
float eigen_y = eigen.imag ();
