Geom::Affine
sp_gradient_get_g2d_matrix(SPGradient const *gr, Geom::Affine const &ctm, Geom::Rect const &bbox)
{
if (gr->getUnits() == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
return ( Geom::Scale(bbox.dimensions())
* Geom::Translate(bbox.min())
* Geom::Affine(ctm) );
} else {
return ctm;
}
}
void
sp_gradient_set_gs2d_matrix(SPGradient *gr, Geom::Affine const &ctm,
Geom::Rect const &bbox, Geom::Affine const &gs2d)
{
gr->gradientTransform = gs2d * ctm.inverse();
if (gr->getUnits() == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX ) {
gr->gradientTransform = ( gr->gradientTransform
* Geom::Translate(-bbox.min())
* Geom::Scale(bbox.dimensions()).inverse() );
}
gr->gradientTransform_set = TRUE;
gr->requestModified(SP_OBJECT_MODIFIED_FLAG);
}