Nikolay Sivov (@nsivov) commented about include/d2d1_1.idl:
[local] void __stdcall D2D1SinCos(float angle, float *s, float *c); [local] float __stdcall D2D1Tan(float angle); [local] float __stdcall D2D1Vec3Length(float x, float y, float z); +[local] float __stdcall D2D1ComputeMaximumScaleFactor(const D2D1_MATRIX_3X2_F *mat);
In SDK 10.0.26100.0 this prototype is in d2d1_2.h.