1 files changed, 6 insertions, 7 deletions
diff --git a/wimmel.frag b/wimmel.frag
index d3cf745..b148852 100644
--- a/wimmel.frag
+++ b/wimmel.frag
@@ -1,20 +1,19 @@
 varying vec2 v_texcoord;
 uniform sampler2D tex;
 uniform vec2 pixelsize;
-uniform vec4 search_rect;
+/* The rect to match against */
+uniform vec4 srect;
 uniform int barrier;
 
 void
 main()
 {
-	float i, j;
-	float width = search_rect[2];
-	float height = search_rect[3];
 	int diff = 0;
+	float i, j;
 
-	for (i = 0.0; i < width && diff < barrier; i += pixelsize.x) {
-		for (j = 0.0; j < height && diff < barrier; j += pixelsize.y) {
-			vec4 match = texture2D(tex, search_rect.xy + vec2(i,j));
+	for (i = 0.0; i < srect[2] && diff < barrier; i += pixelsize.x) {
+		for (j = 0.0; j < srect[3] && diff < barrier; j += pixelsize.y) {
+			vec4 match = texture2D(tex, srect.xy + vec2(i,j));
 			vec4 orig = texture2D(tex, v_texcoord + vec2(i,j));
 
 			diff += int(any(greaterThan(abs(orig - match), vec4(0.2))));