public static BitmapSource CropScreen(BitmapSource fullScreenBtimap, CropViewBox viewBox)
{
try
{
var cropScreenbox = new Int32Rect(
(int)Math.Round(viewBox.CropScreenbox.Left, 0),
(int)Math.Round(viewBox.CropScreenbox.Top, 0),
(int)Math.Round(viewBox.CropScreenbox.Width, 0),
(int)Math.Round(viewBox.CropScreenbox.Height, 0));
var extendBitmap = ExtendFullScreenBitmap(fullScreenBtimap, ref cropScreenbox);
var croppedBitmap = new CroppedBitmap(extendBitmap, cropScreenbox);
if (viewBox.IsTransform)
{
//旋转、翻转变换
var drawingVisual = new DrawingVisual();
using (var context = drawingVisual.RenderOpen())
{
var brush = new ImageBrush(croppedBitmap)
{
Stretch = Stretch.None,
RelativeTransform = viewBox.RenderTransform,
};
context.DrawRectangle(brush, null, new Rect(0, 0, viewBox.TransformViewbox.Width, viewBox.TransformViewbox.Height));
}
var renderBitmap = new RenderTargetBitmap((int)viewBox.TransformViewbox.Width, (int)viewBox.TransformViewbox.Height, 96, 96, PixelFormats.Pbgra32);
renderBitmap.Render(drawingVisual);
croppedBitmap = new CroppedBitmap(renderBitmap, new Int32Rect((int)Math.Round(viewBox.CropViewbox.X, 0), (int)Math.Round(viewBox.CropViewbox.Y, 0), (int)Math.Round(viewBox.CropViewbox.Width, 0), (int)Math.Round(viewBox.CropViewbox.Height, 0)));
}
return(croppedBitmap);
}
catch (Exception ex)
{
Trace.WriteLine(ex.ToString());
return(null);
}
}
public static BitmapSource CropScreen(CropViewBox viewBox)
{
return(CropScreen(CopyScreen(), viewBox));
}