improve:截图

2025-09-13 14:16:11 +08:00
parent 98d4a4213c
commit c54d140107
3 changed files with 518 additions and 63 deletions
@@ -154,51 +154,91 @@ namespace Ink_Canvas.Helpers
        }

        /// <summary>
-        /// 获取当前帧的Bitmap
-        /// </summary>
-        public Bitmap GetCurrentFrame()
-        {
-            lock (_frameLock)
-            {
-                return _currentFrame?.Clone() as Bitmap;
-            }
-        }
-
-        /// <summary>
-        /// 获取当前帧的BitmapSource（WPF格式）
+        /// 获取当前帧的BitmapSource（WPF格式），直接返回可用的WPF位图
        /// </summary>
        public BitmapSource GetCurrentFrameAsBitmapSource()
        {
            lock (_frameLock)
            {
                if (_currentFrame == null)
+                {
+                    LogHelper.WriteLogToFile("GetCurrentFrameAsBitmapSource: _currentFrame为null");
                    return null;
+                }

                try
                {
-                    using (var memory = new MemoryStream())
+                    LogHelper.WriteLogToFile($"GetCurrentFrameAsBitmapSource: 开始处理帧，类型={_currentFrame.GetType().FullName}");
+                    LogHelper.WriteLogToFile($"GetCurrentFrameAsBitmapSource: 帧HashCode={_currentFrame.GetHashCode()}");
+                    
+                    // 验证当前帧的有效性
+                    var width = _currentFrame.Width;
+                    var height = _currentFrame.Height;
+                    LogHelper.WriteLogToFile($"GetCurrentFrameAsBitmapSource: 当前帧尺寸={width}x{height}");
+                    
+                    // 验证位图有效性
+                    if (width <= 0 || height <= 0)
                    {
-                        _currentFrame.Save(memory, ImageFormat.Png);
-                        memory.Position = 0;
+                        LogHelper.WriteLogToFile("当前帧无效: 尺寸为0", LogHelper.LogType.Warning);
+                        return null;
+                    }

-                        var bitmapImage = new BitmapImage();
-                        bitmapImage.BeginInit();
-                        bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
-                        bitmapImage.StreamSource = memory;
-                        bitmapImage.EndInit();
-                        bitmapImage.Freeze();
+                    // 使用更安全的方法转换位图
+                    var bitmapData = _currentFrame.LockBits(
+                        new Rectangle(0, 0, width, height),
+                        ImageLockMode.ReadOnly,
+                        _currentFrame.PixelFormat);

-                        return bitmapImage;
+                    try
+                    {
+                        // 根据像素格式选择合适的WPF像素格式
+                        System.Windows.Media.PixelFormat wpfPixelFormat;
+                        switch (_currentFrame.PixelFormat)
+                        {
+                            case PixelFormat.Format24bppRgb:
+                                wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr24;
+                                break;
+                            case PixelFormat.Format32bppArgb:
+                                wpfPixelFormat = System.Windows.Media.PixelFormats.Bgra32;
+                                break;
+                            case PixelFormat.Format32bppRgb:
+                                wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr32;
+                                break;
+                            default:
+                                wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr24;
+                                break;
+                        }
+
+                        var bitmapSource = System.Windows.Media.Imaging.BitmapSource.Create(
+                            bitmapData.Width,
+                            bitmapData.Height,
+                            _currentFrame.HorizontalResolution,
+                            _currentFrame.VerticalResolution,
+                            wpfPixelFormat,
+                            null,
+                            bitmapData.Scan0,
+                            bitmapData.Stride * bitmapData.Height,
+                            bitmapData.Stride);
+
+                        bitmapSource.Freeze();
+                        LogHelper.WriteLogToFile($"GetCurrentFrameAsBitmapSource: 成功创建BitmapSource");
+                        return bitmapSource;
+                    }
+                    finally
+                    {
+                        _currentFrame.UnlockBits(bitmapData);
                    }
                }
                catch (Exception ex)
                {
                    LogHelper.WriteLogToFile($"转换帧为BitmapSource失败: {ex.Message}", LogHelper.LogType.Error);
+                    LogHelper.WriteLogToFile($"异常详情: {ex}", LogHelper.LogType.Error);
                    return null;
                }
            }
        }

+
        /// <summary>
        /// 视频源新帧事件处理
        /// </summary>
@@ -206,13 +246,52 @@ namespace Ink_Canvas.Helpers
        {
            try
            {
+                LogHelper.WriteLogToFile($"VideoSource_NewFrame: 接收到新帧");
+                
                lock (_frameLock)
                {
                    // 释放之前的帧
                    _currentFrame?.Dispose();
                    
-                    // 克隆新帧
-                    _currentFrame = eventArgs.Frame.Clone() as Bitmap;
+                    // 创建新的位图，避免Clone的问题
+                    var sourceFrame = eventArgs.Frame;
+                    LogHelper.WriteLogToFile($"VideoSource_NewFrame: 源帧类型={sourceFrame?.GetType().FullName}");
+                    LogHelper.WriteLogToFile($"VideoSource_NewFrame: 源帧HashCode={sourceFrame?.GetHashCode()}");
+                    
+                    if (sourceFrame != null)
+                    {
+                        try
+                        {
+                            var width = sourceFrame.Width;
+                            var height = sourceFrame.Height;
+                            LogHelper.WriteLogToFile($"VideoSource_NewFrame: 源帧尺寸={width}x{height}");
+                            
+                            if (width > 0 && height > 0)
+                            {
+                                _currentFrame = new Bitmap(width, height, PixelFormat.Format24bppRgb);
+                                using (var graphics = Graphics.FromImage(_currentFrame))
+                                {
+                                    graphics.DrawImage(sourceFrame, 0, 0);
+                                }
+                                LogHelper.WriteLogToFile($"VideoSource_NewFrame: 成功创建新帧，HashCode={_currentFrame.GetHashCode()}");
+                            }
+                            else
+                            {
+                                LogHelper.WriteLogToFile($"VideoSource_NewFrame: 源帧尺寸无效");
+                                _currentFrame = null;
+                            }
+                        }
+                        catch (Exception frameEx)
+                        {
+                            LogHelper.WriteLogToFile($"VideoSource_NewFrame: 处理源帧失败: {frameEx.Message}", LogHelper.LogType.Error);
+                            _currentFrame = null;
+                        }
+                    }
+                    else
+                    {
+                        LogHelper.WriteLogToFile($"VideoSource_NewFrame: 源帧为null");
+                        _currentFrame = null;
+                    }
                }

                // 在UI线程中触发事件
@@ -28,12 +28,14 @@ namespace Ink_Canvas
        public Rectangle Area;
        public List<Point> Path;
        public Bitmap CameraImage;
+        public System.Windows.Media.Imaging.BitmapSource CameraBitmapSource;

-        public ScreenshotResult(Rectangle area, List<Point> path = null, Bitmap cameraImage = null)
+        public ScreenshotResult(Rectangle area, List<Point> path = null, Bitmap cameraImage = null, System.Windows.Media.Imaging.BitmapSource cameraBitmapSource = null)
        {
            Area = area;
            Path = path;
            CameraImage = cameraImage;
+            CameraBitmapSource = cameraBitmapSource;
        }
    }

@@ -60,9 +62,14 @@ namespace Ink_Canvas
                if (screenshotResult.HasValue)
                {
                    // 检查是否是摄像头截图
-                    if (screenshotResult.Value.CameraImage != null)
+                    if (screenshotResult.Value.CameraBitmapSource != null)
                    {
-                        // 摄像头截图
+                        // 摄像头截图（使用BitmapSource）
+                        await InsertBitmapSourceToCanvas(screenshotResult.Value.CameraBitmapSource);
+                    }
+                    else if (screenshotResult.Value.CameraImage != null)
+                    {
+                        // 摄像头截图（使用Bitmap）
                        await InsertScreenshotToCanvas(screenshotResult.Value.CameraImage);
                    }
                    else if (screenshotResult.Value.Area.Width > 0 && screenshotResult.Value.Area.Height > 0)
@@ -164,7 +171,16 @@ namespace Ink_Canvas
                    if (selectorWindow.ShowDialog() == true)
                    {
                        // 检查是否是摄像头截图
-                        if (selectorWindow.CameraImage != null)
+                        if (selectorWindow.CameraBitmapSource != null)
+                        {
+                            result = new ScreenshotResult(
+                                Rectangle.Empty, // 摄像头截图不需要区域
+                                null, // 摄像头截图不需要路径
+                                null, // 不再使用Bitmap
+                                selectorWindow.CameraBitmapSource // 摄像头BitmapSource
+                            );
+                        }
+                        else if (selectorWindow.CameraImage != null)
                        {
                            result = new ScreenshotResult(
                                Rectangle.Empty, // 摄像头截图不需要区域
@@ -236,8 +252,40 @@ namespace Ink_Canvas
        {
            try
            {
+                // 验证位图有效性
+                if (bitmap == null)
+                {
+                    ShowNotification("截图数据无效");
+                    return;
+                }
+
+                // 添加详细的位图调试信息
+                LogHelper.WriteLogToFile($"InsertScreenshotToCanvas: 开始处理位图");
+                LogHelper.WriteLogToFile($"位图对象类型: {bitmap.GetType().FullName}");
+                LogHelper.WriteLogToFile($"位图对象HashCode: {bitmap.GetHashCode()}");
+                
+                // 检查位图是否已被释放
+                try
+                {
+                    var testWidth = bitmap.Width;
+                    var testHeight = bitmap.Height;
+                    LogHelper.WriteLogToFile($"位图尺寸验证成功: {testWidth}x{testHeight}");
+                }
+                catch (Exception ex)
+                {
+                    LogHelper.WriteLogToFile($"位图验证失败: {ex.Message}", LogHelper.LogType.Error);
+                    ShowNotification("截图数据已损坏");
+                    return;
+                }
+
                // 将Bitmap转换为WPF BitmapSource
                var bitmapSource = ConvertBitmapToBitmapSource(bitmap);
+                
+                if (bitmapSource == null)
+                {
+                    ShowNotification("转换截图失败");
+                    return;
+                }

                // 创建WPF Image控件
                var image = new Image
@@ -293,6 +341,67 @@ namespace Ink_Canvas
            }
        }

+        // 将BitmapSource插入到画布（用于摄像头截图）
+        private async Task InsertBitmapSourceToCanvas(System.Windows.Media.Imaging.BitmapSource bitmapSource)
+        {
+            try
+            {
+                LogHelper.WriteLogToFile($"InsertBitmapSourceToCanvas: 开始处理BitmapSource");
+
+                // 创建WPF Image控件
+                var image = new Image
+                {
+                    Source = bitmapSource,
+                    Stretch = Stretch.Uniform
+                };
+                RenderOptions.SetBitmapScalingMode(image, BitmapScalingMode.HighQuality);
+
+                // 生成唯一名称
+                string timestamp = "camera_" + DateTime.Now.ToString("yyyyMMdd_HH_mm_ss_fff");
+                image.Name = timestamp;
+
+                // 初始化TransformGroup
+                InitializeScreenshotTransform(image);
+
+                // 设置截图属性，避免被InkCanvas选择系统处理
+                image.IsHitTestVisible = true;
+                image.Focusable = false;
+
+                // 初始化InkCanvas选择设置
+                InitializeInkCanvasSelectionSettings();
+
+                // 等待图片加载完成后再进行居中处理
+                image.Loaded += (sender, e) =>
+                {
+                    // 确保在UI线程中执行
+                    Dispatcher.BeginInvoke(new Action(() =>
+                    {
+                        CenterAndScaleScreenshot(image);
+                        // 绑定事件处理器
+                        BindScreenshotEvents(image);
+                    }), DispatcherPriority.Loaded);
+                };
+
+                // 添加到画布
+                inkCanvas.Children.Add(image);
+
+                // 提交历史记录
+                timeMachine.CommitElementInsertHistory(image);
+
+                // 插入图片后切换到选择模式并刷新浮动栏高光显示
+                SetCurrentToolMode(InkCanvasEditingMode.Select);
+                UpdateCurrentToolMode("select");
+                HideSubPanels("select");
+
+                ShowNotification("摄像头截图已插入到画布");
+            }
+            catch (Exception ex)
+            {
+                ShowNotification($"插入摄像头截图失败: {ex.Message}");
+                LogHelper.WriteLogToFile($"插入摄像头截图失败: {ex.Message}", LogHelper.LogType.Error);
+            }
+        }
+
        // 初始化截图的TransformGroup
        private void InitializeScreenshotTransform(Image image)
        {
@@ -501,24 +610,235 @@ namespace Ink_Canvas
        {
            try
            {
-                using (var memory = new MemoryStream())
+                // 验证位图有效性
+                if (bitmap == null)
                {
-                    bitmap.Save(memory, ImageFormat.Png);
-                    memory.Position = 0;
+                    LogHelper.WriteLogToFile("位图无效: 位图为null", LogHelper.LogType.Warning);
+                    return null;
+                }

-                    var bitmapImage = new BitmapImage();
-                    bitmapImage.BeginInit();
-                    bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
-                    bitmapImage.StreamSource = memory;
-                    bitmapImage.EndInit();
-                    bitmapImage.Freeze();
+                // 尝试访问位图属性，如果失败说明位图已损坏
+                int width, height;
+                try
+                {
+                    width = bitmap.Width;
+                    height = bitmap.Height;
+                }
+                catch (Exception ex)
+                {
+                    LogHelper.WriteLogToFile($"位图已损坏，无法访问属性: {ex.Message}", LogHelper.LogType.Error);
+                    return null;
+                }

-                    return bitmapImage;
+                if (width <= 0 || height <= 0)
+                {
+                    LogHelper.WriteLogToFile($"位图无效: 尺寸为{width}x{height}", LogHelper.LogType.Warning);
+                    return null;
+                }
+
+                LogHelper.WriteLogToFile($"开始转换位图: 尺寸={width}x{height}, 格式={bitmap.PixelFormat}, DPI={bitmap.HorizontalResolution}x{bitmap.VerticalResolution}");
+
+                // 使用更安全的方法转换位图
+                var bitmapData = bitmap.LockBits(
+                    new Rectangle(0, 0, bitmap.Width, bitmap.Height),
+                    ImageLockMode.ReadOnly,
+                    bitmap.PixelFormat);
+
+                try
+                {
+                    LogHelper.WriteLogToFile($"LockBits成功: Stride={bitmapData.Stride}, Scan0={bitmapData.Scan0}");
+
+                    // 根据像素格式选择合适的WPF像素格式
+                    System.Windows.Media.PixelFormat wpfPixelFormat;
+                    switch (bitmap.PixelFormat)
+                    {
+                        case PixelFormat.Format24bppRgb:
+                            wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr24;
+                            LogHelper.WriteLogToFile("使用Bgr24像素格式");
+                            break;
+                        case PixelFormat.Format32bppArgb:
+                            wpfPixelFormat = System.Windows.Media.PixelFormats.Bgra32;
+                            LogHelper.WriteLogToFile("使用Bgra32像素格式");
+                            break;
+                        case PixelFormat.Format32bppRgb:
+                            wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr32;
+                            LogHelper.WriteLogToFile("使用Bgr32像素格式");
+                            break;
+                        default:
+                            // 默认使用Bgr24，如果格式不匹配则转换
+                            wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr24;
+                            LogHelper.WriteLogToFile($"未知像素格式{bitmap.PixelFormat}，使用默认Bgr24");
+                            break;
+                    }
+
+                    var bitmapSource = System.Windows.Media.Imaging.BitmapSource.Create(
+                        bitmapData.Width,
+                        bitmapData.Height,
+                        bitmap.HorizontalResolution,
+                        bitmap.VerticalResolution,
+                        wpfPixelFormat,
+                        null,
+                        bitmapData.Scan0,
+                        bitmapData.Stride * bitmapData.Height,
+                        bitmapData.Stride);
+
+                    bitmapSource.Freeze();
+                    LogHelper.WriteLogToFile("位图转换成功");
+                    return bitmapSource;
+                }
+                finally
+                {
+                    bitmap.UnlockBits(bitmapData);
                }
            }
            catch (Exception ex)
            {
-                LogHelper.WriteLogToFile($"转换位图失败: {ex.Message}", LogHelper.LogType.Error);
+                LogHelper.WriteLogToFile($"直接转换位图失败: {ex.Message}", LogHelper.LogType.Error);
+                LogHelper.WriteLogToFile($"异常详情: {ex}", LogHelper.LogType.Error);
+                
+                // 尝试使用备用方法：内存流转换
+                try
+                {
+                    LogHelper.WriteLogToFile("尝试使用内存流方式转换位图", LogHelper.LogType.Info);
+                    return ConvertBitmapToBitmapSourceFallback(bitmap);
+                }
+                catch (Exception fallbackEx)
+                {
+                    LogHelper.WriteLogToFile($"备用转换方法也失败: {fallbackEx.Message}", LogHelper.LogType.Error);
+                    LogHelper.WriteLogToFile($"备用方法异常详情: {fallbackEx}", LogHelper.LogType.Error);
+                    
+                    // 最后尝试：使用最简单的转换方法
+                    try
+                    {
+                        LogHelper.WriteLogToFile("尝试最简单的转换方法", LogHelper.LogType.Info);
+                        return ConvertBitmapToBitmapSourceSimple(bitmap);
+                    }
+                    catch (Exception simpleEx)
+                    {
+                        LogHelper.WriteLogToFile($"简单转换方法也失败: {simpleEx.Message}", LogHelper.LogType.Error);
+                        throw;
+                    }
+                }
+            }
+        }
+
+        // 备用的位图转换方法（使用内存流）
+        private BitmapSource ConvertBitmapToBitmapSourceFallback(Bitmap bitmap)
+        {
+            try
+            {
+                LogHelper.WriteLogToFile("开始备用转换方法");
+                
+                // 验证位图有效性
+                if (bitmap == null)
+                {
+                    LogHelper.WriteLogToFile("备用方法：位图为null", LogHelper.LogType.Warning);
+                    return null;
+                }
+
+                if (bitmap.Width <= 0 || bitmap.Height <= 0)
+                {
+                    LogHelper.WriteLogToFile($"备用方法：位图尺寸无效 {bitmap.Width}x{bitmap.Height}", LogHelper.LogType.Warning);
+                    return null;
+                }
+
+                LogHelper.WriteLogToFile($"备用方法：位图尺寸={bitmap.Width}x{bitmap.Height}, 格式={bitmap.PixelFormat}");
+
+                // 创建一个新的位图，确保格式正确
+                using (var convertedBitmap = new Bitmap(bitmap.Width, bitmap.Height, PixelFormat.Format24bppRgb))
+                {
+                    LogHelper.WriteLogToFile("创建转换位图成功");
+                    
+                    using (var graphics = Graphics.FromImage(convertedBitmap))
+                    {
+                        LogHelper.WriteLogToFile("开始绘制到转换位图");
+                        graphics.DrawImage(bitmap, 0, 0);
+                        LogHelper.WriteLogToFile("绘制完成");
+                    }
+
+                    using (var memory = new MemoryStream())
+                    {
+                        LogHelper.WriteLogToFile("开始保存到内存流");
+                        convertedBitmap.Save(memory, ImageFormat.Png);
+                        LogHelper.WriteLogToFile($"保存完成，内存流大小={memory.Length}");
+                        
+                        memory.Position = 0;
+
+                        var bitmapImage = new BitmapImage();
+                        bitmapImage.BeginInit();
+                        bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
+                        bitmapImage.StreamSource = memory;
+                        bitmapImage.EndInit();
+                        bitmapImage.Freeze();
+
+                        LogHelper.WriteLogToFile("备用转换方法成功");
+                        return bitmapImage;
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                LogHelper.WriteLogToFile($"备用转换方法失败: {ex.Message}", LogHelper.LogType.Error);
+                LogHelper.WriteLogToFile($"备用方法异常详情: {ex}", LogHelper.LogType.Error);
+                throw;
+            }
+        }
+
+        // 最简单的位图转换方法
+        private BitmapSource ConvertBitmapToBitmapSourceSimple(Bitmap bitmap)
+        {
+            try
+            {
+                LogHelper.WriteLogToFile("开始简单转换方法");
+                
+                if (bitmap == null)
+                {
+                    LogHelper.WriteLogToFile("简单方法：位图为null", LogHelper.LogType.Warning);
+                    return null;
+                }
+
+                LogHelper.WriteLogToFile($"简单方法：位图尺寸={bitmap.Width}x{bitmap.Height}");
+
+                // 使用最基础的方法：直接保存为PNG然后加载
+                var tempFile = System.IO.Path.GetTempFileName() + ".png";
+                
+                try
+                {
+                    LogHelper.WriteLogToFile($"保存临时文件到: {tempFile}");
+                    bitmap.Save(tempFile, ImageFormat.Png);
+                    
+                    LogHelper.WriteLogToFile("开始加载临时文件");
+                    var bitmapImage = new BitmapImage();
+                    bitmapImage.BeginInit();
+                    bitmapImage.UriSource = new Uri(tempFile);
+                    bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
+                    bitmapImage.EndInit();
+                    bitmapImage.Freeze();
+                    
+                    LogHelper.WriteLogToFile("简单转换方法成功");
+                    return bitmapImage;
+                }
+                finally
+                {
+                    // 清理临时文件
+                    try
+                    {
+                        if (System.IO.File.Exists(tempFile))
+                        {
+                            System.IO.File.Delete(tempFile);
+                            LogHelper.WriteLogToFile("临时文件已删除");
+                        }
+                    }
+                    catch (Exception deleteEx)
+                    {
+                        LogHelper.WriteLogToFile($"删除临时文件失败: {deleteEx.Message}", LogHelper.LogType.Warning);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                LogHelper.WriteLogToFile($"简单转换方法失败: {ex.Message}", LogHelper.LogType.Error);
+                LogHelper.WriteLogToFile($"简单方法异常详情: {ex}", LogHelper.LogType.Error);
                throw;
            }
        }
@@ -49,6 +49,7 @@ namespace Ink_Canvas
        public DrawingRectangle? SelectedArea { get; private set; }
        public List<WpfPoint> SelectedPath { get; private set; }
        public Bitmap CameraImage { get; private set; }
+        public System.Windows.Media.Imaging.BitmapSource CameraBitmapSource { get; private set; }

        public ScreenshotSelectorWindow()
        {
@@ -156,18 +157,35 @@ namespace Ink_Canvas
                {
                    if (_isCameraMode && CameraPreviewImage != null && frame != null)
                    {
-                        // 克隆帧以避免在转换过程中被释放
-                        using (var clonedFrame = frame.Clone() as Bitmap)
+                        try
                        {
-                            if (clonedFrame != null)
+                            // 验证帧的有效性
+                            if (frame.Width <= 0 || frame.Height <= 0)
                            {
-                                var bitmapSource = ConvertBitmapToBitmapSource(clonedFrame);
-                                if (bitmapSource != null)
-                                {
-                                    CameraPreviewImage.Source = bitmapSource;
-                                    CameraStatusText.Text = "摄像头已连接";
-                                }
+                                LogHelper.WriteLogToFile($"无效的摄像头帧: {frame.Width}x{frame.Height}", LogHelper.LogType.Warning);
+                                return;
                            }
+
+                            // 创建新的位图，避免Clone的问题
+                            var clonedFrame = new Bitmap(frame.Width, frame.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
+                            using (var graphics = System.Drawing.Graphics.FromImage(clonedFrame))
+                            {
+                                graphics.DrawImage(frame, 0, 0);
+                            }
+
+                            var bitmapSource = ConvertBitmapToBitmapSource(clonedFrame);
+                            if (bitmapSource != null)
+                            {
+                                CameraPreviewImage.Source = bitmapSource;
+                                CameraStatusText.Text = "摄像头已连接";
+                            }
+                            
+                            // 释放临时位图
+                            clonedFrame.Dispose();
+                        }
+                        catch (Exception frameEx)
+                        {
+                            LogHelper.WriteLogToFile($"处理摄像头帧时出错: {frameEx.Message}", LogHelper.LogType.Error);
                        }
                    }
                }));
@@ -197,19 +215,57 @@ namespace Ink_Canvas
        {
            try
            {
-                using (var memory = new System.IO.MemoryStream())
+                // 验证位图有效性
+                if (bitmap == null || bitmap.Width <= 0 || bitmap.Height <= 0)
                {
-                    bitmap.Save(memory, System.Drawing.Imaging.ImageFormat.Png);
-                    memory.Position = 0;
+                    LogHelper.WriteLogToFile("位图无效: 空位图或尺寸为0", LogHelper.LogType.Warning);
+                    return null;
+                }

-                    var bitmapImage = new System.Windows.Media.Imaging.BitmapImage();
-                    bitmapImage.BeginInit();
-                    bitmapImage.CacheOption = System.Windows.Media.Imaging.BitmapCacheOption.OnLoad;
-                    bitmapImage.StreamSource = memory;
-                    bitmapImage.EndInit();
-                    bitmapImage.Freeze();
+                // 使用更安全的方法转换位图
+                var bitmapData = bitmap.LockBits(
+                    new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height),
+                    System.Drawing.Imaging.ImageLockMode.ReadOnly,
+                    bitmap.PixelFormat);

-                    return bitmapImage;
+                try
+                {
+                    // 根据像素格式选择合适的WPF像素格式
+                    System.Windows.Media.PixelFormat wpfPixelFormat;
+                    switch (bitmap.PixelFormat)
+                    {
+                        case System.Drawing.Imaging.PixelFormat.Format24bppRgb:
+                            wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr24;
+                            break;
+                        case System.Drawing.Imaging.PixelFormat.Format32bppArgb:
+                            wpfPixelFormat = System.Windows.Media.PixelFormats.Bgra32;
+                            break;
+                        case System.Drawing.Imaging.PixelFormat.Format32bppRgb:
+                            wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr32;
+                            break;
+                        default:
+                            // 默认使用Bgr24，如果格式不匹配则转换
+                            wpfPixelFormat = System.Windows.Media.PixelFormats.Bgr24;
+                            break;
+                    }
+
+                    var bitmapSource = System.Windows.Media.Imaging.BitmapSource.Create(
+                        bitmapData.Width,
+                        bitmapData.Height,
+                        bitmap.HorizontalResolution,
+                        bitmap.VerticalResolution,
+                        wpfPixelFormat,
+                        null,
+                        bitmapData.Scan0,
+                        bitmapData.Stride * bitmapData.Height,
+                        bitmapData.Stride);
+
+                    bitmapSource.Freeze();
+                    return bitmapSource;
+                }
+                finally
+                {
+                    bitmap.UnlockBits(bitmapData);
                }
            }
            catch (Exception ex)
@@ -430,12 +486,12 @@ namespace Ink_Canvas
            {
                if (_cameraService != null && _cameraService.IsCapturing)
                {
-                    // 获取当前帧
-                    var currentFrame = _cameraService.GetCurrentFrame();
-                    if (currentFrame != null)
+                    // 直接获取BitmapSource，避免Bitmap传递问题
+                    var bitmapSource = _cameraService.GetCurrentFrameAsBitmapSource();
+                    if (bitmapSource != null)
                    {
-                        // 保存摄像头图像
-                        CameraImage = currentFrame.Clone() as Bitmap;
+                        // 保存BitmapSource而不是Bitmap
+                        CameraBitmapSource = bitmapSource;
                        
                        // 停止摄像头预览
                        _cameraService.StopPreview();