fix issue where the thing breaks when w/h change

1 files changed, 2 insertions, 0 deletions

diff --git a/shader-gif.html b/shader-gif.html
index 41d80d1..6bff9e2 100644
--- a/shader-gif.html
+++ b/shader-gif.html
@@ -243,6 +243,7 @@ function shade(frame, t){
   var clone = cloneData.data
 
   try {
+    var realw = w, realh = h
     for (var x = 0; x < w; x++) {
       for (var y = 0; y < h; y++) {
         q = 4*(y*w+x)
@@ -252,6 +253,7 @@ function shade(frame, t){
         data[q+1] = g
         data[q+2] = b
         data[q+3] = a
+        w = realw, h = realh
       }
     }
   }