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

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