Try to adjust the mip levels to get box blur for free as needed.

[movit] / lift_gamma_gain_effect.cpp

diff --git a/lift_gamma_gain_effect.cpp b/lift_gamma_gain_effect.cpp
index 149cb4463931dc9836df4360dd35a2480ea3d0fd..19cef18ea25bac5ec897575284b04f79a39996d1 100644 (file)
--- a/lift_gamma_gain_effect.cpp
+++ b/lift_gamma_gain_effect.cpp
@@ -1,19 +1,40 @@
+#define GL_GLEXT_PROTOTYPES 1
+
+#include <math.h>
+#include <GL/gl.h>
+#include <GL/glext.h>
+
 #include "lift_gamma_gain_effect.h"
 #include "util.h"
 
 LiftGammaGainEffect::LiftGammaGainEffect()
        : lift(0.0f, 0.0f, 0.0f),
          gamma(1.0f, 1.0f, 1.0f),
-         gain(1.0f, 1.0f, 1.0f),
-         saturation(1.0f)
+         gain(1.0f, 1.0f, 1.0f)
 {
        register_vec3("lift", (float *)&lift);
        register_vec3("gamma", (float *)&gamma);
        register_vec3("gain", (float *)&gain);
-       register_float("saturation", &saturation);
 }
 
-std::string LiftGammaGainEffect::output_glsl()
+std::string LiftGammaGainEffect::output_fragment_shader()
 {
-       return read_file("lift_gamma_gain_effect.glsl");
+       return read_file("lift_gamma_gain_effect.frag");
+}
+
+void LiftGammaGainEffect::set_uniforms(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num)
+{
+       Effect::set_uniforms(glsl_program_num, prefix, sampler_num);
+
+       RGBTriplet gain_pow_inv_gamma(
+               pow(gain.r, 1.0f / gamma.r),
+               pow(gain.g, 1.0f / gamma.g),
+               pow(gain.b, 1.0f / gamma.b));
+       set_uniform_vec3(glsl_program_num, prefix, "gain_pow_inv_gamma", (float *)&gain_pow_inv_gamma);
+
+       RGBTriplet inv_gamma_22(
+               2.2f / gamma.r,
+               2.2f / gamma.g,
+               2.2f / gamma.b);
+       set_uniform_vec3(glsl_program_num, prefix, "inv_gamma_22", (float *)&inv_gamma_22);
 }