提交qiming-noVNC

qiming-noVNC/core/decoders/zlib.js

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+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2024 The noVNC authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+import Inflator from "../inflator.js";
+
+export default class ZlibDecoder {
+    constructor() {
+        this._zlib = new Inflator();
+        this._length = 0;
+    }
+
+    decodeRect(x, y, width, height, sock, display, depth) {
+        if ((width === 0) || (height === 0)) {
+            return true;
+        }
+
+        if (this._length === 0) {
+            if (sock.rQwait("ZLIB", 4)) {
+                return false;
+            }
+
+            this._length = sock.rQshift32();
+        }
+
+        if (sock.rQwait("ZLIB", this._length)) {
+            return false;
+        }
+
+        let data = new Uint8Array(sock.rQshiftBytes(this._length, false));
+        this._length = 0;
+
+        this._zlib.setInput(data);
+        data = this._zlib.inflate(width * height * 4);
+        this._zlib.setInput(null);
+
+        // Max sure the image is fully opaque
+        for (let i = 0; i < width * height; i++) {
+            data[i * 4 + 3] = 255;
+        }
+
+        display.blitImage(x, y, width, height, data, 0);
+
+        return true;
+    }
+}