float SVGAnimateTransformElement::calculateDistance(const String& fromString, const String& toString)
{
// FIXME: This is not correct in all cases. The spec demands that each component (translate x and y for example)
// is paced separately. To implement this we need to treat each component as individual animation everywhere.
SVGTransform from = parseTransformValue(fromString);
if (!from.isValid())
return -1.f;
SVGTransform to = parseTransformValue(toString);
if (!to.isValid() || from.type() != to.type())
return -1.f;
if (to.type() == SVGTransform::SVG_TRANSFORM_TRANSLATE) {
FloatSize diff = to.translate() - from.translate();
return sqrtf(diff.width() * diff.width() + diff.height() * diff.height());
}
if (to.type() == SVGTransform::SVG_TRANSFORM_ROTATE)
return fabsf(to.angle() - from.angle());
if (to.type() == SVGTransform::SVG_TRANSFORM_SCALE) {
FloatSize diff = to.scale() - from.scale();
return sqrtf(diff.width() * diff.width() + diff.height() * diff.height());
}
return -1.f;
}
