Add `JavaScriptBridge` buffer methods

1 files changed, 32 insertions, 0 deletions

diff --git a/platform/web/js/libs/library_godot_javascript_singleton.js b/platform/web/js/libs/library_godot_javascript_singleton.js
index 6bb69bca95..3ff6abba60 100644
--- a/platform/web/js/libs/library_godot_javascript_singleton.js
+++ b/platform/web/js/libs/library_godot_javascript_singleton.js
@@ -127,6 +127,10 @@ const GodotJSWrapper = {
 			GodotRuntime.setHeapValue(p_exchange, id, 'i64');
 			return 24; // OBJECT
 		},
+
+		isBuffer: function (obj) {
+			return obj instanceof ArrayBuffer || ArrayBuffer.isView(obj);
+		},
 	},
 
 	godot_js_wrapper_interface_get__proxy: 'sync',
@@ -303,6 +307,34 @@ const GodotJSWrapper = {
 			return -1;
 		}
 	},
+
+	godot_js_wrapper_object_is_buffer__proxy: 'sync',
+	godot_js_wrapper_object_is_buffer__sig: 'ii',
+	godot_js_wrapper_object_is_buffer: function (p_id) {
+		const obj = GodotJSWrapper.get_proxied_value(p_id);
+		return GodotJSWrapper.isBuffer(obj)
+			? 1
+			: 0;
+	},
+
+	godot_js_wrapper_object_transfer_buffer__proxy: 'sync',
+	godot_js_wrapper_object_transfer_buffer__sig: 'viiii',
+	godot_js_wrapper_object_transfer_buffer: function (p_id, p_byte_arr, p_byte_arr_write, p_callback) {
+		let obj = GodotJSWrapper.get_proxied_value(p_id);
+		if (!GodotJSWrapper.isBuffer(obj)) {
+			return;
+		}
+
+		if (ArrayBuffer.isView(obj) && !(obj instanceof Uint8Array)) {
+			obj = new Uint8Array(obj.buffer);
+		} else if (obj instanceof ArrayBuffer) {
+			obj = new Uint8Array(obj);
+		}
+
+		const resizePackedByteArrayAndOpenWrite = GodotRuntime.get_func(p_callback);
+		const bytesPtr = resizePackedByteArrayAndOpenWrite(p_byte_arr, p_byte_arr_write, obj.length);
+		HEAPU8.set(obj, bytesPtr);
+	},
 };
 
 autoAddDeps(GodotJSWrapper, '$GodotJSWrapper');