当WPF遇到了gif

 

WPF很强大,但是当WPF的image控件遇到gif时就只读了图片的第一帧,很好很强大!

WPF不屑于gif的简单动画!

但是这对程序员来说不大爽啊!急得我眼泪都下来了!

幸好WPF里有MediaElement这个东西,它是对MediaPlyer的一个封装,果然很强大啊。不过另我不爽的是我这里有N个gif图片就要有N个MediaElement,要了亲命了。

还是不好,如果你能想到用WebBrowseControl来实现,或者用Frame来实现,恭喜你,你太有才了!

我还是不想这么去做,才分不够啊!

重写一下WPF的image,good idea!

public class GIFImageControl : System.Windows.Controls.Image
{
delegate void OnFrameChangedDelegate();
private Bitmap m_Bitmap;
public string Path { get; set; }
BitmapSource bitmapSource;

public void AnimatedImageControl(string path)
{
Path = path;
m_Bitmap = (Bitmap)Image.FromFile(path);
Width = m_Bitmap.Width;
Height = m_Bitmap.Height;
ImageAnimator.Animate(m_Bitmap, OnFrameChanged);
bitmapSource = GetBitmapSource();
Source = bitmapSource;

}


private void OnFrameChanged(object sender, EventArgs e)
{

Dispatcher.BeginInvoke(DispatcherPriority.Normal,
new OnFrameChangedDelegate(OnFrameChangedInMainThread));

}

private void OnFrameChangedInMainThread()
{
ImageAnimator.UpdateFrames();
if (bitmapSource != null)
bitmapSource.Freeze();
bitmapSource = GetBitmapSource();
Source = bitmapSource;
InvalidateVisual();
}

//private static bool loaded;
private BitmapSource GetBitmapSource()
{
IntPtr inptr = m_Bitmap.GetHbitmap();
bitmapSource = Imaging.CreateBitmapSourceFromHBitmap(
inptr, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
DeleteObject(inptr);
return bitmapSource;
}

[DllImport("gdi32")]
static extern int DeleteObject(IntPtr o);
}

ok,用window原有的东西去绑定到wpf上去。很好吧!是不是也比较有才呢?

原文地址:https://www.cnblogs.com/makubexsoft/p/2128739.html