X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=lift_gamma_gain_effect.frag;h=ceb2081c752591e71277b10af64e8e499f2f2cb1;hp=9047d64bbc2230c263e6fb5a6025642435cf8cd0;hb=88e9f85b9e48e05f0f9d35d199db03e5352919c4;hpb=58e7b9a8164bdaad7b0c698b2d0d80db53d79a5c

diff --git a/lift_gamma_gain_effect.frag b/lift_gamma_gain_effect.frag
index 9047d64..ceb2081 100644
--- a/lift_gamma_gain_effect.frag
+++ b/lift_gamma_gain_effect.frag
@@ -1,6 +1,8 @@
+// Implicit uniforms:
+//
 // These are calculated in the host code to save some arithmetic.
-uniform vec3 PREFIX(gain_pow_inv_gamma);  // gain^(1/gamma).
-uniform vec3 PREFIX(inv_gamma_22);  // 2.2 / gamma.
+// uniform vec3 PREFIX(gain_pow_inv_gamma);  // gain^(1/gamma).
+// uniform vec3 PREFIX(inv_gamma_22);  // 2.2 / gamma.
 
 vec4 FUNCNAME(vec2 tc) {
 	vec4 x = INPUT(tc);
@@ -12,6 +14,10 @@ vec4 FUNCNAME(vec2 tc) {
 
 	x.rgb = pow(x.rgb, vec3(1.0/2.2));
 	x.rgb += PREFIX(lift) * (vec3(1) - x.rgb);
+
+	// Clip out-of-gamut values again.
+	x.rgb = max(x.rgb, 0.0);
+
 	x.rgb = pow(x.rgb, PREFIX(inv_gamma_22));
 	x.rgb *= PREFIX(gain_pow_inv_gamma);
 	x.rgb *= x.aaa;