D2D1ComputeMaximumScaleFactor function (d2d1_2.h)

Computes the maximum factor by which a given transform can stretch any vector.

Syntax

FLOAT D2D1ComputeMaximumScaleFactor(
  [in] const D2D1_MATRIX_3X2_F *matrix
);

Parameters

[in] matrix

The input transform matrix.

Return value

The scale factor.

Remarks

Formally, if M is the input matrix, this method will return the maximum value of |V * M| / |V| for all vectors V, where |.| denotes length.

Requirements