X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=luma_mix_effect.frag;h=c8a05c1e976b3a614f5b0af0a654e8758c2520bf;hp=bf0833eec8d0c834c3b9048f32b3edd359ff8255;hb=641053e9fc86b2166e361a983075febc3bb69acd;hpb=2dbb70f2939095c9e4f7cda082f69695ad1c268c

diff --git a/luma_mix_effect.frag b/luma_mix_effect.frag
index bf0833e..c8a05c1 100644
--- a/luma_mix_effect.frag
+++ b/luma_mix_effect.frag
@@ -1,4 +1,5 @@
 uniform float PREFIX(progress_mul_w_plus_one);
+uniform bool PREFIX(inverse);
 
 vec4 FUNCNAME(vec2 tc) {
 	vec4 first = INPUT1(tc);
@@ -36,8 +37,11 @@ vec4 FUNCNAME(vec2 tc) {
 	// So clearly, it should move (w+1) units to the right, and apart from that
 	// just stay a simple mapping.
 	float w = PREFIX(transition_width);
-	float luma = INPUT3(tc).x * w;
-	float m = clamp((luma - w) + PREFIX(progress_mul_w_plus_one), 0.0, 1.0);
+	float luma = INPUT3(tc).x;
+	if (PREFIX(inverse)) {
+		luma = 1.0 - luma;
+	}
+	float m = clamp((luma * w - w) + PREFIX(progress_mul_w_plus_one), 0.0, 1.0);
 
 	return mix(first, second, m);
 }