X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=glow_effect.h;h=340cf3d76888950ee3c536794c1bb32f1b360595;hp=1b5644ba62db9a835e911484e21897b3bb1abf27;hb=ad8a6bd307bcb9399a19f9100780f52513c8500d;hpb=f99ad333a7acbb6c8c995dbb036484ae8940c490

diff --git a/glow_effect.h b/glow_effect.h
index 1b5644b..340cf3d 100644
--- a/glow_effect.h
+++ b/glow_effect.h
@@ -1,33 +1,63 @@
-#ifndef _GLOW_EFFECT_H
-#define _GLOW_EFFECT_H 1
+#ifndef _MOVIT_GLOW_EFFECT_H
+#define _MOVIT_GLOW_EFFECT_H 1
 
-// Glow: Simply add a blurred version of the image to itself.
+// Glow: Cut out the highlights of the image (everything above a certain threshold),
+// blur them, and overlay them onto the original image.
+
+#include <epoxy/gl.h>
+#include <assert.h>
+#include <string>
 
 #include "effect.h"
 
+namespace movit {
+
 class BlurEffect;
+class EffectChain;
+class HighlightCutoffEffect;
 class MixEffect;
+class Node;
 
 class GlowEffect : public Effect {
 public:
 	GlowEffect();
-	virtual std::string effect_type_id() const { return "GlowEffect"; }
+	std::string effect_type_id() const override { return "GlowEffect"; }
 
-	virtual bool needs_srgb_primaries() const { return false; }
+	bool needs_srgb_primaries() const override { return false; }
 
-	virtual void add_self_to_effect_chain(EffectChain *chain, const std::vector<Effect *> &input);
-	virtual bool set_float(const std::string &key, float value);
+	void rewrite_graph(EffectChain *graph, Node *self) override;
+	bool set_float(const std::string &key, float value) override;
 
-	virtual std::string output_fragment_shader() {
+	std::string output_fragment_shader() override {
 		assert(false);
 	}
-	virtual void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) {
+	void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) override {
 		assert(false);
 	}
 
 private:
 	BlurEffect *blur;
+	HighlightCutoffEffect *cutoff;
 	MixEffect *mix;
 };
 
-#endif // !defined(_GLOW_EFFECT_H)
+// An effect that cuts out only the highlights of an image;
+// anything at the cutoff or below is set to 0.0, and then all other pixels
+// get the cutoff subtracted. Used only as part of GlowEffect.
+
+class HighlightCutoffEffect : public Effect {
+public:
+	HighlightCutoffEffect();
+	std::string effect_type_id() const override { return "HighlightCutoffEffect"; }
+	std::string output_fragment_shader() override;
+	
+	AlphaHandling alpha_handling() const override { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
+	bool strong_one_to_one_sampling() const override { return true; }
+
+private:
+	float cutoff;
+};
+
+}  // namespace movit
+
+#endif // !defined(_MOVIT_GLOW_EFFECT_H)