git.sesse.net Git - movit/blob - lift_gamma_gain_effect.cpp

   1 #include <GL/glew.h>
   2 #include <math.h>
   3
   4 #include "effect_util.h"
   5 #include "lift_gamma_gain_effect.h"
   6 #include "util.h"
   7
   8 LiftGammaGainEffect::LiftGammaGainEffect()
   9         : lift(0.0f, 0.0f, 0.0f),
  10           gamma(1.0f, 1.0f, 1.0f),
  11           gain(1.0f, 1.0f, 1.0f)
  12 {
  13         register_vec3("lift", (float *)&lift);
  14         register_vec3("gamma", (float *)&gamma);
  15         register_vec3("gain", (float *)&gain);
  16 }
  17
  18 std::string LiftGammaGainEffect::output_fragment_shader()
  19 {
  20         return read_file("lift_gamma_gain_effect.frag");
  21 }
  22
  23 void LiftGammaGainEffect::set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num)
  24 {
  25         Effect::set_gl_state(glsl_program_num, prefix, sampler_num);
  26
  27         RGBTriplet gain_pow_inv_gamma(
  28                 pow(gain.r, 1.0f / gamma.r),
  29                 pow(gain.g, 1.0f / gamma.g),
  30                 pow(gain.b, 1.0f / gamma.b));
  31         set_uniform_vec3(glsl_program_num, prefix, "gain_pow_inv_gamma", (float *)&gain_pow_inv_gamma);
  32
  33         RGBTriplet inv_gamma_22(
  34                 2.2f / gamma.r,
  35                 2.2f / gamma.g,
  36                 2.2f / gamma.b);
  37         set_uniform_vec3(glsl_program_num, prefix, "inv_gamma_22", (float *)&inv_gamma_22);
  38 }