X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_expansion_effect.cpp;fp=gamma_expansion_effect.cpp;h=15e0bffb8f03ed0a1bf034c29b9fbbcd6245be38;hp=95437906f4c63134232e7775ba630016b2b6748f;hb=9c12e38b7cd88a77ef297d080b7c41e6bd6326fb;hpb=1ec439c7fb975c09029adaa9090e7f35ce6484b8

diff --git a/gamma_expansion_effect.cpp b/gamma_expansion_effect.cpp
index 9543790..15e0bff 100644
--- a/gamma_expansion_effect.cpp
+++ b/gamma_expansion_effect.cpp
@@ -12,6 +12,13 @@ GammaExpansionEffect::GammaExpansionEffect()
 	: source_curve(GAMMA_LINEAR)
 {
 	register_int("source_curve", (int *)&source_curve);
+	register_uniform_float("linear_scale", &uniform_linear_scale);
+	register_uniform_float("c0", &uniform_c0);
+	register_uniform_float("c1", &uniform_c1);
+	register_uniform_float("c2", &uniform_c2);
+	register_uniform_float("c3", &uniform_c3);
+	register_uniform_float("c4", &uniform_c4);
+	register_uniform_float("beta", &uniform_beta);
 }
 
 string GammaExpansionEffect::output_fragment_shader()
@@ -80,13 +87,13 @@ void GammaExpansionEffect::set_gl_state(GLuint glsl_program_num, const string &p
 		//
 		// Note that the worst _relative_ error by far is just at the beginning
 		// of the exponential curve, ie., just around β.
-		set_uniform_float(glsl_program_num, prefix, "linear_scale", 1.0 / 12.92);
-		set_uniform_float(glsl_program_num, prefix, "c0", 0.001324469581);
-		set_uniform_float(glsl_program_num, prefix, "c1", 0.02227416690);
-		set_uniform_float(glsl_program_num, prefix, "c2", 0.5917615253);
-		set_uniform_float(glsl_program_num, prefix, "c3", 0.4733532353);
-		set_uniform_float(glsl_program_num, prefix, "c4", -0.08880738120);
-		set_uniform_float(glsl_program_num, prefix, "beta", 0.04045);
+		uniform_linear_scale = 1.0 / 12.92;
+		uniform_c0 = 0.001324469581;
+		uniform_c1 = 0.02227416690;
+		uniform_c2 = 0.5917615253;
+		uniform_c3 = 0.4733532353;
+		uniform_c4 = -0.08880738120;
+		uniform_beta = 0.04045;
 	}
 	if (source_curve == GAMMA_REC_709) {  // Also includes Rec. 601, and 10-bit Rec. 2020.
 		// Rec. 2020, page 3; ɑ = 1.099, β = 0.018 * 4.5, ɣ = 1/0.45.
@@ -97,13 +104,13 @@ void GammaExpansionEffect::set_gl_state(GLuint glsl_program_num, const string &p
 		// Note that Rec. 2020 only gives the other direction, which is why
 		// our beta and gamma are different from the numbers mentioned
 		// (we've inverted the formula).
-		set_uniform_float(glsl_program_num, prefix, "linear_scale", 1.0 / 4.5);
-		set_uniform_float(glsl_program_num, prefix, "c0", 0.005137028744);
-		set_uniform_float(glsl_program_num, prefix, "c1", 0.09802596889);
-		set_uniform_float(glsl_program_num, prefix, "c2", 0.7255768864);
-		set_uniform_float(glsl_program_num, prefix, "c3", 0.2135067966);
-		set_uniform_float(glsl_program_num, prefix, "c4", -0.04225094667);
-		set_uniform_float(glsl_program_num, prefix, "beta", 0.018 * 4.5);
+		uniform_linear_scale = 1.0 / 4.5;
+		uniform_c0 = 0.005137028744;
+		uniform_c1 = 0.09802596889;
+		uniform_c2 = 0.7255768864;
+		uniform_c3 = 0.2135067966;
+		uniform_c4 = -0.04225094667;
+		uniform_beta = 0.018 * 4.5;
 	}
 	if (source_curve == GAMMA_REC_2020_12_BIT) {
 		// Rec. 2020, page 3; ɑ = 1.0993, β = 0.0181 * 4.5, ɣ = 1/0.45.
@@ -114,13 +121,13 @@ void GammaExpansionEffect::set_gl_state(GLuint glsl_program_num, const string &p
 		// Note that Rec. 2020 only gives the other direction, which is why
 		// our beta and gamma are different from the numbers mentioned
 		// (we've inverted the formula).
-		set_uniform_float(glsl_program_num, prefix, "linear_scale", 1.0 / 4.5);
-		set_uniform_float(glsl_program_num, prefix, "c0", 0.005167545928);
-		set_uniform_float(glsl_program_num, prefix, "c1", 0.09835585809);
-		set_uniform_float(glsl_program_num, prefix, "c2", 0.7254820139);
-		set_uniform_float(glsl_program_num, prefix, "c3", 0.2131291155);
-		set_uniform_float(glsl_program_num, prefix, "c4", -0.04213877222);
-		set_uniform_float(glsl_program_num, prefix, "beta", 0.0181 * 4.5);
+		uniform_linear_scale = 1.0 / 4.5;
+		uniform_c0 = 0.005167545928;
+		uniform_c1 = 0.09835585809;
+		uniform_c2 = 0.7254820139;
+		uniform_c3 = 0.2131291155;
+		uniform_c4 = -0.04213877222;
+		uniform_beta = 0.0181 * 4.5;
 	}
 }