Refactor

1 files changed, 16 insertions, 8 deletions

diff --git a/index.htm b/index.htm
index 1339f23..4542dc7 100644
--- a/index.htm
+++ b/index.htm
@@ -77,13 +77,19 @@
                   this.pixels_address       = program.exports.js_pixels();
                   this.frames               = new Float32Array(this.memory_buffer, this.sound_buffer_address, program.exports.js_max_num_sound_frames());
 
-                  let bytes         = new Uint8Array(this.memory_buffer);
                   let title_address = program.exports.js_title();
-                  let title_len       = 0;
-                  while (bytes[title_address + title_len] != 0)
-                    ++title_len;
-                  let title_buffer = new ArrayBuffer(title_len);
-                  new Uint8Array(title_buffer).set(bytes.subarray(title_address, title_address + title_len));
+
+                  let title_buffer;
+
+                  if (title_address != 0) {
+                    let bytes         = new Uint8Array(this.memory_buffer);
+                    let title_len       = 0;
+                    while (bytes[title_address + title_len] != 0)
+                      ++title_len;
+                    let title_buffer = new ArrayBuffer(title_len);
+                    new Uint8Array(title_buffer).set(bytes.subarray(title_address, title_address + title_len));
+                  } else
+                    title_buffer = undefined;
 
                   this.port.postMessage({
                     id           : "init",
@@ -448,8 +454,10 @@
 
           let message_handlers = {
             init : (ev) => {
-              document.title = new TextDecoder("utf8").decode(new Uint8Array(ev.title_buffer));
-              sound_ready    = true;
+              if (ev.title_buffer != undefined)
+                document.title = new TextDecoder("utf8").decode(new Uint8Array(ev.title_buffer));
+
+              sound_ready = true;
 
               window.requestAnimationFrame(animation_frame);
             },