CJKmkp/community
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

improve:截图

Browse Source
This commit is contained in:
CJKmkp
2025-09-13 14:16:11 +08:00
parent 98d4a4213c
commit c54d140107
3 changed files with 518 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Ink Canvas/Helpers/CameraService.cs
+103 -24
View File
@@ -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