WPF Tranform-Flip Image-优快云博客

本文介绍了如何在WPF中使用RenderTransform属性和ScaleTransform类实现图像水平和垂直翻转，确保翻转中心位于图像中心，避免额外的平移转换。通过代码示例详细展示了实现过程。

Use a ScaleTransform with a ScaleX of -1 for horizontal and ScaleY of -1 for vertical flipping, applied to the image's RenderTransform property. Using RenderTransformOrigin="0.5,0.5" on the image makes sure your image gets flipped around its center, so you won't have to apply an additional TranslateTransform to move it into place:

<Image Source="a.jpg" Padding="5" RenderTransformOrigin="0.5,0.5">
  <Image.RenderTransform>
    <ScaleTransform ScaleX="-1"/>
  </Image.RenderTransform>
</Image>

for horizontal flipping and

<Image Source="a.jpg" Padding="5" RenderTransformOrigin="0.5,0.5">
  <Image.RenderTransform>
    <ScaleTransform ScaleY="-1"/>
  </Image.RenderTransform>
</Image>

for vertical.

If you want to do it in code-behind, in C# it should look something like this:

img.RenderTransformOrigin = new Point(0.5,0.5);
ScaleTransform flipTrans = new ScaleTransform();
flipTrans.ScaleX = -1;
//flipTrans.ScaleY = -1;
img.RenderTransform = flipTrans;

Rotate and scale ImageBrush

TransformGroup tg = new Transformgroup();
tg.Children.Add(rotateTransform);
tg.Children.Add(scaleTransform);
bgbrush.RelativeTransform = tg;

参考

how to flip Image in wpf

Rotate and scale ImageBrush

转载于:https://www.cnblogs.com/HQFZ/p/4704258.html