1 #ifndef _MOVIT_GLOW_EFFECT_H
2 #define _MOVIT_GLOW_EFFECT_H 1
4 // Glow: Cut out the highlights of the image (everything above a certain threshold),
5 // blur them, and overlay them onto the original image.
15 class HighlightCutoffEffect;
19 class GlowEffect : public Effect {
22 virtual std::string effect_type_id() const { return "GlowEffect"; }
24 virtual bool needs_srgb_primaries() const { return false; }
26 virtual void rewrite_graph(EffectChain *graph, Node *self);
27 virtual bool set_float(const std::string &key, float value);
29 virtual std::string output_fragment_shader() {
32 virtual void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) {
38 HighlightCutoffEffect *cutoff;
42 // An effect that cuts out only the highlights of an image;
43 // anything at the cutoff or below is set to 0.0, and then all other pixels
44 // get the cutoff subtracted. Used only as part of GlowEffect.
46 class HighlightCutoffEffect : public Effect {
48 HighlightCutoffEffect();
49 virtual std::string effect_type_id() const { return "HighlightCutoffEffect"; }
50 std::string output_fragment_shader();
52 virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
58 #endif // !defined(_MOVIT_GLOW_EFFECT_H)