+#include <math.h>
+#include <assert.h>
+
+#include "glow_effect.h"
+#include "blur_effect.h"
+#include "mix_effect.h"
+#include "effect_chain.h"
+#include "util.h"
+
+GlowEffect::GlowEffect()
+ : blur(new BlurEffect),
+ mix(new MixEffect)
+{
+ mix->set_float("strength_first", 1.0f);
+ mix->set_float("strength_second", 0.3f);
+}
+
+void GlowEffect::add_self_to_effect_chain(EffectChain *chain, const std::vector<Effect *> &inputs) {
+ assert(inputs.size() == 1);
+ blur->add_self_to_effect_chain(chain, inputs);
+
+ std::vector<Effect *> mix_inputs;
+ mix_inputs.push_back(inputs[0]);
+ mix_inputs.push_back(chain->last_added_effect()); // FIXME
+ mix->add_self_to_effect_chain(chain, mix_inputs);
+}
+
+bool GlowEffect::set_float(const std::string &key, float value) {
+ if (key == "blurred_mix_amount") {
+ return mix->set_float("strength_second", value);
+ }
+ return blur->set_float(key, value);
+}