void DiffusionEffect::add_self_to_effect_chain(EffectChain *chain, const std::vector<Effect *> &inputs) {
assert(inputs.size() == 1);
blur->add_self_to_effect_chain(chain, inputs);
void DiffusionEffect::add_self_to_effect_chain(EffectChain *chain, const std::vector<Effect *> &inputs) {
assert(inputs.size() == 1);
blur->add_self_to_effect_chain(chain, inputs);