WebTransformationMatrix WebTransformOperations::blend(const WebTransformOperations& from, double progress) const
{
WebTransformationMatrix toReturn;
bool fromIdentity = from.isIdentity();
bool toIdentity = isIdentity();
if (fromIdentity && toIdentity)
return toReturn;
if (matchesTypes(from)) {
size_t numOperations = max(fromIdentity ? 0 : from.m_private->operations.size(),
toIdentity ? 0 : m_private->operations.size());
for (size_t i = 0; i < numOperations; ++i) {
WebTransformationMatrix blended = blendTransformOperations(
fromIdentity ? 0 : &from.m_private->operations[i],
toIdentity ? 0 : &m_private->operations[i],
progress);
toReturn.multiply(blended);
}
} else {
toReturn = apply();
WebTransformationMatrix fromTransform = from.apply();
toReturn.blend(fromTransform, progress);
}
return toReturn;
}
bool WebTransformOperations::matchesTypes(const WebTransformOperations& other) const
{
if (isIdentity() || other.isIdentity())
return true;
if (m_private->operations.size() != other.m_private->operations.size())
return false;
for (size_t i = 0; i < m_private->operations.size(); ++i) {
if (m_private->operations[i].type != other.m_private->operations[i].type
&& !m_private->operations[i].isIdentity()
&& !other.m_private->operations[i].isIdentity())
return false;
}
return true;
}
