X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=luma_mix_effect.frag;h=e721a885892a17ea9ff303570169292d978aa830;hp=bf0833eec8d0c834c3b9048f32b3edd359ff8255;hb=e90eb349c71419e874f34f1ab122f57bebeacda7;hpb=b757191bc6d258887445d88cdfe5b18666295660

diff --git a/luma_mix_effect.frag b/luma_mix_effect.frag
index bf0833e..e721a88 100644
--- a/luma_mix_effect.frag
+++ b/luma_mix_effect.frag
@@ -1,4 +1,6 @@
-uniform float PREFIX(progress_mul_w_plus_one);
+// Implicit uniforms:
+// uniform float PREFIX(progress_mul_w_plus_one);
+// uniform bool PREFIX(inverse);
 
 vec4 FUNCNAME(vec2 tc) {
 	vec4 first = INPUT1(tc);
@@ -36,8 +38,11 @@ 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);
 }