init

2025-06-30 16:24:20 +08:00
commit 68de5eb048
454 changed files with 56921 additions and 0 deletions
@@ -0,0 +1,55 @@
+// ignore_for_file: avoid_print, prefer_typing_uninitialized_variables
+
+import 'dart:ui';
+import 'package:tencent_cloud_chat_uikit/ui/utils/logger.dart';
+
+class Frame {
+  static var orginalCallback;
+
+  static init() {
+    orginalCallback = window.onReportTimings;
+    window.onReportTimings = onReportTimings;
+  }
+
+  // 仅缓存最近 25 帧绘制耗时
+  static const maxframes = 25;
+  static final List<FrameTiming> lastFrames = [];
+  // 基准 VSync 信号周期
+  static const frameInterval =
+      Duration(microseconds: Duration.microsecondsPerSecond ~/ 60);
+
+  static void onReportTimings(List<FrameTiming> timings) {
+    lastFrames.addAll(timings);
+    // 仅保留 25 帧
+    if (lastFrames.length > maxframes) {
+      lastFrames.removeRange(0, lastFrames.length - maxframes);
+    }
+    // 如果有原始帧回调函数，则执行
+    if (orginalCallback != null) {
+      orginalCallback(timings);
+    }
+    outputLogger.i("fps: $fps");
+  }
+
+  static double get fps {
+    int sum = 0;
+    for (FrameTiming timing in lastFrames) {
+      // 计算渲染耗时
+      int duration = timing.timestampInMicroseconds(FramePhase.rasterFinish) -
+          timing.timestampInMicroseconds(FramePhase.buildStart);
+      // 判断耗时是否在 Vsync 信号周期内
+      if (duration < frameInterval.inMicroseconds) {
+        sum += 1;
+      } else {
+        // 有丢帧，向上取整
+        int count = (duration / frameInterval.inMicroseconds).ceil();
+        sum += count;
+      }
+    }
+    return lastFrames.length / sum * 60;
+  }
+
+  static destroy() {
+    window.onReportTimings = null;
+  }
+}