From 2047fd822b97659f291d02c6f573503a03eb2b8e Mon Sep 17 00:00:00 2001
From: Kingtous <kingtous@qq.com>
Date: Wed, 15 Feb 2023 16:44:40 +0800
Subject: [PATCH] opt: early unlock frame

---
 flutter/lib/models/model.dart | 10 ++++++----
 flutter/lib/utils/image.dart  |  2 ++
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/flutter/lib/models/model.dart b/flutter/lib/models/model.dart
index 8cf90eba9..a1d9ff0df 100644
--- a/flutter/lib/models/model.dart
+++ b/flutter/lib/models/model.dart
@@ -438,15 +438,17 @@ class ImageModel with ChangeNotifier {
     }
 
     final pid = parent.target?.id;
-    ui.decodeImageFromPixels(
+    img.decodeImageFromPixels(
         rgba,
         parent.target?.ffiModel.display.width ?? 0,
         parent.target?.ffiModel.display.height ?? 0,
-        isWeb ? ui.PixelFormat.rgba8888 : ui.PixelFormat.bgra8888, (image) {
+        isWeb ? ui.PixelFormat.rgba8888 : ui.PixelFormat.bgra8888,
+        onPixelsCopied: () {
+      // Unlock the rgba memory from rust codes.
+      platformFFI.nextRgba(id);
+    }).then((image) {
       if (parent.target?.id != pid) return;
       try {
-        // Unlock the rgba memory from rust codes.
-        platformFFI.nextRgba(id);
         // my throw exception, because the listener maybe already dispose
         update(image);
       } catch (e) {
diff --git a/flutter/lib/utils/image.dart b/flutter/lib/utils/image.dart
index 7a6bcbc15..a153dbc63 100644
--- a/flutter/lib/utils/image.dart
+++ b/flutter/lib/utils/image.dart
@@ -11,6 +11,7 @@ Future<ui.Image> decodeImageFromPixels(
   int? rowBytes,
   int? targetWidth,
   int? targetHeight,
+  VoidCallback? onPixelsCopied,
   bool allowUpscaling = true,
 }) async {
   if (targetWidth != null) {
@@ -22,6 +23,7 @@ Future<ui.Image> decodeImageFromPixels(
 
   final ui.ImmutableBuffer buffer =
       await ui.ImmutableBuffer.fromUint8List(pixels);
+  onPixelsCopied?.call();
   final ui.ImageDescriptor descriptor = ui.ImageDescriptor.raw(
     buffer,
     width: width,