From 4f0b889b74b71b8667b17022c389bf4f313868be Mon Sep 17 00:00:00 2001
From: Guy Perfect <guytpk@gmail.com>
Date: Tue, 18 Feb 2025 15:10:46 -0600
Subject: [PATCH] Adjustments for use in the web frontend

---
 web/Audio.js     |  2 --
 web/Constants.js |  5 ++---
 web/Core.js      | 37 ++++++++++++++++++++++++++++++++++++-
 web/VB.js        | 26 ++++++++++++++++++++++++--
 4 files changed, 62 insertions(+), 8 deletions(-)

diff --git a/web/Audio.js b/web/Audio.js
index 093560f..8178ccf 100644
--- a/web/Audio.js
+++ b/web/Audio.js
@@ -1,7 +1,5 @@
 "use strict";
 
-//////////////////////////////////// Audio ////////////////////////////////////
-
 // Dedicated audio output processor
 class Audio extends AudioWorkletProcessor {
 
diff --git a/web/Constants.js b/web/Constants.js
index a8f318f..37d7206 100644
--- a/web/Constants.js
+++ b/web/Constants.js
@@ -1,4 +1,5 @@
-let Constants = {
+"use strict";
+export default {
 
     // Core
     VB: {
@@ -85,5 +86,3 @@ let Constants = {
     }
 
 };
-
-export { Constants };
diff --git a/web/Core.js b/web/Core.js
index 92b75b9..cb261bc 100644
--- a/web/Core.js
+++ b/web/Core.js
@@ -1,5 +1,5 @@
 "use strict";
-import { Constants } from "./Constants.js";
+import Constants from /***/"./Constants.js";
 
 
 
@@ -258,6 +258,41 @@ new class Core {
         });
     }
 
+    // Attempt to produce a ROM from an ISX debugger file
+    fromISX(message) {
+
+        // Transfer the input data into WebAssembly memory
+        let input = new Uint8Array(message.data);
+        let inPtr = this.Realloc(0, input.length);
+        let inMem = new Uint8Array(this.memory.buffer, inPtr, input.length);
+        for (let x = 0; x < input.length; x++)
+            inMem[x] = input[x];
+
+        // Attempt to decode the ISX file as a ROM
+        let outPtr = this.FromISX(inPtr, input.length);
+        this.Realloc(inPtr, 0);
+
+        // The data is not an ISX file
+        if (outPtr == 0) {
+            this.dom.postMessage({ promised: true, data: null });
+            return;
+        }
+
+        // Transfer the decoded ROM from WebAssembly memory
+        let output = new Uint8Array(this.GetISXLength(outPtr));
+        let outMem = new Uint8Array(this.memory.buffer,
+            this.GetISXROM(outPtr), output.length);
+        for (let x = 0; x < output.length; x++)
+            output[x] = outMem[x];
+        this.Realloc(outPtr, 0);
+
+        // Notify DOM thread
+        this.dom.postMessage({
+            promised: true,
+            data    : output.buffer
+        }, [ output.buffer ]);
+    }
+
     // Specify anaglyph colors
     setAnaglyph(message) {
         this.SetAnaglyph(message.sim, message.left, message.right);
diff --git a/web/VB.js b/web/VB.js
index 1b2150f..e1dc088 100644
--- a/web/VB.js
+++ b/web/VB.js
@@ -1,5 +1,5 @@
 "use strict";
-import { Constants } from "./Constants.js";
+import Constants from /**/"./Constants.js";
 
 // Instantiation guard
 const GUARD = Symbol();
@@ -864,6 +864,28 @@ class VB {
         return true;
     }
 
+    // Decode an ISX debugger file to a Virtual Boy ROM
+    async fromISX(data) {
+
+        // Validation
+        if (data instanceof ArrayBuffer)
+            data = new Uint8Array(data);
+        if (
+            !(data instanceof Uint8Array) &&
+            !(data instanceof Uint8ClampedArray)
+        ) data = Uint8Array.from(data);
+
+        // Send the memory to the core
+        data = data.slice();
+        let response = await this.#toCore({
+            command  : "fromISX",
+            promised : true,
+            data     : data.buffer,
+            transfers: [ data.buffer ]
+        });
+        return response.data == null ? null : new Uint8Array(response.data);
+    }
+
     // Suspend automatic emulation
     async suspend() {
 
@@ -932,4 +954,4 @@ class VB {
 
 }
 
-export { VB };
+export default VB;