private void UpdateImage()
{
if (bmp.Handle != IntPtr.Zero) //以下代码将原始图像数据用来进行图像！
{
Win32Api.CopyMemory((IntPtr)bmp.Pointer, (IntPtr)DataCopy, bmp.Stride * bmp.Height);
}
switch (filters)
{
case FiltersMethod.BoxBlur:
BlurEffect.BoxBlur(bmp, (int)trbValue.Value);
break;
case FiltersMethod.Mosaic:
BlurEffect.Mosaic(bmp, (int)trbValue.Value);
break;
}
Graphics G = picPreview.CreateGraphics();
IntPtr Hdc = G.GetHdc();
bmp.DrawImage(Hdc, DestX, DestY, ViewWidth, ViewHeight, 0, 0, bmp.Width, bmp.Height);
G.ReleaseHdc();
G.Dispose();
picPreview.Invalidate();
Graphics Gcanvas = canvas.CreateGraphics();
IntPtr canvasHdc = Gcanvas.GetHdc();
bmp.DrawImage(canvasHdc, 0, 0, canvas.Width, canvas.Height, 0, 0, bmp.Width, bmp.Height);
Gcanvas.ReleaseHdc();
Gcanvas.Dispose();
canvas.Invalidate();
}