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

   1 #define GL_GLEXT_PROTOTYPES 1
   2
   3 #include <math.h>
   4 #include <GL/gl.h>
   5 #include <GL/glext.h>
   6
   7 #include "lift_gamma_gain_effect.h"
   8 #include "util.h"
   9
  10 LiftGammaGainEffect::LiftGammaGainEffect()
  11         : lift(0.0f, 0.0f, 0.0f),
  12           gamma(1.0f, 1.0f, 1.0f),
  13           gain(1.0f, 1.0f, 1.0f),
  14           saturation(1.0f)
  15 {
  16         register_vec3("lift", (float *)&lift);
  17         register_vec3("gamma", (float *)&gamma);
  18         register_vec3("gain", (float *)&gain);
  19         register_float("saturation", &saturation);
  20 }
  21
  22 std::string LiftGammaGainEffect::output_glsl()
  23 {
  24         return read_file("lift_gamma_gain_effect.glsl");
  25 }
  26
  27 void LiftGammaGainEffect::set_uniforms(GLhandleARB glsl_program_num, const std::string &prefix)
  28 {
  29         Effect::set_uniforms(glsl_program_num, prefix);
  30
  31         RGBTriplet gain_pow_inv_gamma(
  32                 pow(gain.r, 1.0f / gamma.r),
  33                 pow(gain.g, 1.0f / gamma.g),
  34                 pow(gain.b, 1.0f / gamma.b));
  35         set_uniform_vec3(glsl_program_num, prefix, "gain_pow_inv_gamma", (float *)&gain_pow_inv_gamma);
  36
  37         RGBTriplet inv_gamma_22(
  38                 2.2f / gamma.r,
  39                 2.2f / gamma.g,
  40                 2.2f / gamma.b);
  41         set_uniform_vec3(glsl_program_num, prefix, "inv_gamma_22", (float *)&gain_pow_inv_gamma);
  42 }