1 files changed, 4 insertions, 3 deletions
diff --git a/index.htm b/index.htm
index d426609..1339f23 100644
--- a/index.htm
+++ b/index.htm
@@ -17,6 +17,7 @@
 
             this.frame_width  = 0;
             this.frame_height = 0;
+            this.pixels_size  = 0;
 
             let event_handlers = {
               wasm : (ev) => {
@@ -96,6 +97,7 @@
               resize : (ev) => {
                 this.frame_width  = ev.width;
                 this.frame_height = ev.height;
+                this.pixels_size  = ev.width * ev.height * 4;
               },
 
               mousedown : (ev) => {
@@ -162,9 +164,8 @@
 
             this.program.exports.js_frame(this.frame_width, this.frame_height, num_samples);
 
-            let pixels_size   = this.frame_width * this.frame_height * 4;
-            let pixels_buffer = new ArrayBuffer(pixels_size);
-            new Uint8Array(pixels_buffer).set(new Uint8Array(this.memory_buffer, this.pixels_address, pixels_size));
+            let pixels_buffer = new ArrayBuffer(this.pixels_size);
+            new Uint8Array(pixels_buffer).set(new Uint8Array(this.memory_buffer, this.pixels_address, this.pixels_size));
 
             this.port.postMessage({
               id            : "frame",