Support more platforms by dynamically determining max WASM memory

build.zig

@@ -69,6 +69,7 @@ pub fn build(b: *std.Build) !void {
  "-pthread",
  "-sPTHREAD_POOL_SIZE=navigator.hardwareConcurrency",
  "-sINITIAL_MEMORY=167772160",
+ "-sMAXIMUM_MEMORY=4gb",
  "-sALLOW_MEMORY_GROWTH",
  "-sEXPORTED_FUNCTIONS=_startInitRenderer,_tryFinishInitRenderer,_initRendererIsOk,_initRendererGetPixels,_initRendererGetWidth,_initRendererGetHeight,_initRendererGetErr,_deinitRenderer,_startRender,_tryFinishRender,_rotateCamera,_moveCamera",
  "-sEXPORTED_RUNTIME_METHODS=ccall,cwrap",

www/index.html

@@ -93,6 +93,51 @@
  charset="utf-8"
  ></script>
  <script src="https://cdn.jsdelivr.net/npm/notyf@3/notyf.min.js"></script>
+ <script>
+ const initialMemorySize = 2560;
+
+ const allowed = (maximum) => {
+ try {
+ new WebAssembly.Memory({ initial: initialMemorySize, maximum, shared: true });
+ return true;
+ } catch (RangeError) {
+ return false;
+ }
+ };
+
+ const findMaximumMemorySize = () => {
+ let maximum = initialMemorySize;
+
+ while (maximum < 65536 && allowed(initialMemorySize, maximum)) {
+ maximum = Math.min(maximum * 2, 65536);
+ }
+
+ let left = initialMemorySize;
+ let right = maximum;
+
+ while (left < right) {
+ const mid = Math.ceil((left + right) / 2);
+
+ if (allowed(initialMemorySize, mid)) {
+ left = mid;
+ } else {
+ right = mid - 1;
+ }
+ }
+
+ return left;
+ };
+
+ const maximumMemorySize = findMaximumMemorySize();
+
+ var Module = {
+ wasmMemory: new WebAssembly.Memory({
+ initial: initialMemorySize,
+ maximum: maximumMemorySize,
+ shared: true,
+ }),
+ };
+ </script>
  <script src="ray-tracer-challenge.js"></script>
  <script src="index.js"></script>
  </body>