void PowerStrokePointArrayParam::param_transform_multiply(Geom::Affine const &postmul, bool /*set*/)
{
// Check if proportional stroke-width scaling is on
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
bool transform_stroke = prefs ? prefs->getBool("/options/transform/stroke", true) : true;
if (transform_stroke) {
std::vector<Geom::Point> result;
result.reserve(_vector.size()); // reserve space for the points that will be added in the for loop
for (std::vector<Geom::Point>::const_iterator point_it = _vector.begin(), e = _vector.end();
point_it != e; ++point_it)
{
// scale each width knot with the average scaling in X and Y
Geom::Coord const A = (*point_it)[Geom::Y] * ((postmul.expansionX() + postmul.expansionY()) / 2);
result.push_back(Geom::Point((*point_it)[Geom::X], A));
}
param_set_and_write_new_value(result);
}
}
static Geom::Point sp_pattern_extract_scale(SPPattern *pat)
{
Geom::Affine transf = pat->patternTransform;
return Geom::Point( transf.expansionX(), transf.expansionY() );
}