Flipping an Image | ComponentOne Bitmap for WinForms

Flipping an Image

In This Topic

Bitmap lets you flip an image vertically or horizontally. To produce a flipped image using Bitmap, you can set the TransformOptions property of the FlipRotator class. The TransformOption property can be set through TransformOptions enumeration.

The image below shows a horizontally-flipped image.

Horizontally flip an image using ComponentOne Bitmap for WinForms

The following code illustrates flipping an image vertically or horizontally on button clicks. This example uses the sample created in the Quick start section.

Visual Basic
C#

Visual Basic

Private Sub ApplyTransform(t As BaseTransform)
    Dim newBitmap = bitmap.Transform(t)
    bitmap.Dispose()
    bitmap = newBitmap
    selection = New RectF(1.0F, 1.0F)
    UpdateImage()
End Sub

'Event to flip the image vertically on button click
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    ApplyTransform(New FlipRotator(TransformOptions.FlipVertical))
End Sub

'Event to flip the image horizontally on button click
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
    ApplyTransform(New FlipRotator(TransformOptions.FlipHorizontal))
End Sub

void ApplyTransform(BaseTransform t)
{
    var newBitmap = bitmap.Transform(t);
    bitmap.Dispose();

    bitmap = newBitmap;
    selection = new RectF(1f, 1f);

    UpdateImage();
}
        
//Event to flip the image vertically on button click
private void button3_Click(object sender, EventArgs e)
{
    ApplyTransform(new FlipRotator(TransformOptions.FlipVertical));
}

//Event to flip the image horizontally on button click
private void button4_Click(object sender, EventArgs e)
{
    ApplyTransform(new FlipRotator(TransformOptions.FlipHorizontal));
}