Add a diffusion effect, and hook it up in the GUI.

[movit] / diffusion_effect.cpp

diff --git a/diffusion_effect.cpp b/diffusion_effect.cpp
new file mode 100644 (file)
index 0000000..cf3188b
--- /dev/null
+++ b/diffusion_effect.cpp
@@ -0,0 +1,46 @@
+#include <math.h>
+#include <assert.h>
+
+#include "diffusion_effect.h"
+#include "blur_effect.h"
+#include "effect_chain.h"
+#include "util.h"
+
+DiffusionEffect::DiffusionEffect()
+       : blur(new BlurEffect),
+         overlay_matte(new OverlayMatteEffect)
+{
+}
+
+std::string DiffusionEffect::output_fragment_shader()
+{
+       return read_file("sandbox_effect.frag");
+}
+
+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);
+
+       std::vector<Effect *> overlay_matte_inputs;
+       overlay_matte_inputs.push_back(inputs[0]);
+       overlay_matte_inputs.push_back(chain->get_last_added_effect());  // FIXME
+       overlay_matte->add_self_to_effect_chain(chain, overlay_matte_inputs);
+}
+
+bool DiffusionEffect::set_float(const std::string &key, float value) {
+       if (key == "blurred_mix_amount") {
+               return overlay_matte->set_float(key, value);
+       }
+       return blur->set_float(key, value);
+}
+
+OverlayMatteEffect::OverlayMatteEffect()
+       : blurred_mix_amount(0.3f)
+{
+       register_float("blurred_mix_amount", &blurred_mix_amount);
+}
+
+std::string OverlayMatteEffect::output_fragment_shader()
+{
+       return read_file("overlay_matte_effect.frag");
+}