X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=vignette_effect.frag;h=e8d185f6165f912b325fd61e3caef7e4c8cd5b68;hp=bc84516437685727301a7f512f0f9aba911cd724;hb=919101c59390dbbe380af7cc77102819e515a632;hpb=74cdd144cf35c403d9a8a3f35420f1eaa3d84cc4

diff --git a/vignette_effect.frag b/vignette_effect.frag
index bc84516..e8d185f 100644
--- a/vignette_effect.frag
+++ b/vignette_effect.frag
@@ -1,16 +1,19 @@
 // A simple, circular vignette, with a cos² falloff.
-	
-uniform float PREFIX(inv_radius);
-uniform vec2 PREFIX(aspect_correction);
+
+// Implicit uniforms:
+// uniform float PREFIX(pihalf_div_radius);
+//
+// uniform vec2 PREFIX(aspect_correction);
+// uniform vec2 PREFIX(flipped_center);
 
 vec4 FUNCNAME(vec2 tc) {
-	vec4 x = LAST_INPUT(tc);
+	vec4 x = INPUT(tc);
 
 	const float pihalf = 0.5 * 3.14159265358979324;
 
-	vec2 normalized_pos = (tc - PREFIX(center)) * PREFIX(aspect_correction);
-	float dist = (length(normalized_pos) - PREFIX(inner_radius)) * PREFIX(inv_radius);
-	float linear_falloff = clamp(dist, 0.0, 1.0) * pihalf;
+	vec2 normalized_pos = (tc - PREFIX(flipped_center)) * PREFIX(aspect_correction);
+	float dist = (length(normalized_pos) - PREFIX(inner_radius)) * PREFIX(pihalf_div_radius);
+	float linear_falloff = clamp(dist, 0.0, pihalf);
 	float falloff = cos(linear_falloff) * cos(linear_falloff);
 	x.rgb *= vec3(falloff);