njin_post.h

#pragma once
#include "_types.h"
 
namespace njin {
struct context;


struct post_fx {
  f32 brightness = 0.0f; 
  f32 contrast = 1.0f;   
  f32 saturation = 1.0f; 
  f32 sepia = 0.0f;      
  rgba tint{1.0f, 1.0f, 1.0f, 1.0f}; 

  f32 vignette = 0.0f;         
  f32 vignette_radius = 0.75f; 
  f32 vignette_softness = 0.45f; 
  rgba vignette_color{0.0f, 0.0f, 0.0f, 1.0f}; 

  f32 bloom = 0.0f;           
  f32 bloom_threshold = 0.7f; 
  f32 bloom_radius = 1.0f;    

  f32 blur = 0.0f;       
  f32 chromatic = 0.0f;  
  f32 scanlines = 0.0f;  
  f32 scanline_size = 3.0f; 
  f32 crt_curve = 0.0f;  
  f32 pixelate = 0.0f;   
  f32 grain = 0.0f;      

  f32 dof = 0.0f;           
  f32 dof_focus = 10.0f;    
  f32 dof_range = 2.0f;     
  f32 dof_falloff = 10.0f;  
  vec3 dof_center{0.0f, 0.0f, 0.0f};
  f32 dof_radius = 0.0f;    
  rgba dof_haze{0.0f, 0.0f, 0.0f, 0.0f};
};

void post_fx_set(context &ctx, const post_fx &fx);

post_fx post_fx_get(const context &ctx);

post_fx post_fx_lerp(const post_fx &a, const post_fx &b, f32 t);

namespace post {
inline post_fx crt() {
  post_fx p{};
  p.crt_curve = 0.12f;
  p.scanlines = 0.35f;
  p.chromatic = 1.5f;
  p.vignette = 0.45f;
  p.contrast = 1.1f;
  p.brightness = 0.03f;
  return p;
}

inline post_fx noir() {
  post_fx p{};
  p.saturation = 0.0f;
  p.contrast = 1.25f;
  p.vignette = 0.6f;
  p.vignette_radius = 0.65f;
  p.grain = 0.08f;
  return p;
}

inline post_fx vintage() {
  post_fx p{};
  p.sepia = 0.8f;
  p.contrast = 0.9f;
  p.vignette = 0.5f;
  p.grain = 0.05f;
  return p;
}

inline post_fx dream() {
  post_fx p{};
  p.bloom = 0.9f;
  p.bloom_threshold = 0.55f;
  p.bloom_radius = 1.6f;
  p.saturation = 1.15f;
  p.vignette = 0.25f;
  return p;
}

inline post_fx glow() {
  post_fx p{};
  p.bloom = 1.0f;
  p.bloom_threshold = 0.65f;
  return p;
}

inline post_fx retro() {
  post_fx p{};
  p.pixelate = 4.0f;
  p.scanlines = 0.2f;
  p.scanline_size = 4.0f;
  p.saturation = 1.1f;
  return p;
}

inline post_fx hurt() {
  post_fx p{};
  p.vignette = 0.7f;
  p.vignette_radius = 0.6f;
  p.vignette_color = {0.6f, 0.0f, 0.0f, 1.0f};
  p.saturation = 0.7f;
  return p;
}

inline post_fx paused() {
  post_fx p{};
  p.blur = 6.0f;
  p.brightness = -0.15f;
  p.saturation = 0.6f;
  return p;
}
} // namespace post

} // namespace njin