void uiDrawMatrixSkew(uiDrawMatrix *m, double x, double y, double xamount, double yamount)
{
BAffineTransform a;
m2a(m, &a);
// TODO degrees or radians?
a.ShearBy(BPoint(x, y), BPoint(xamount, yamount));
a2m(&a, m);
}
const BAffineTransform&
BAffineTransform::SetScale(double x, double y)
{
double tx;
double ty;
double rotation;
double shearX;
double shearY;
if (!GetAffineParameters(&tx, &ty, &rotation, NULL, NULL,
&shearX, &shearY)) {
return *this;
}
BAffineTransform result;
result.ShearBy(shearX, shearY);
result.ScaleBy(x, y);
result.RotateBy(rotation);
result.TranslateBy(tx, ty);
return *this = result;
}