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Graphics.ScaleTransform Method (Single, Single)

Applies the specified scaling operation to the transformation matrix of this Graphics by prepending it to the object's transformation matrix.

Namespace:  System.Drawing
Assembly:  System.Drawing (in System.Drawing.dll)

public void ScaleTransform(
	float sx,
	float sy
)

Parameters

sx
Type: System.Single
Scale factor in the x direction.
sy
Type: System.Single
Scale factor in the y direction.

The scaling operation consists of multiplying the transformation matrix by a diagonal matrix whose elements are (sx, sy, 1). This method prepends the transformation matrix of the Graphics by the scaling matrix.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgs e, which is a parameter of the Paint event handler. The code performs the following actions:

  • Rotates the world transformation matrix of the Windows Form by 30 degrees.

  • Scales that matrix by a factor of 3 in the x direction and a factor of 1 in the y direction by prepending the scaling transformation.

  • Draws a scaled, rotated rectangle with a blue pen.

The result is still a rectangle.


private void ScaleTransformFloat(PaintEventArgs e)
{

    // Set world transform of graphics object to rotate.
    e.Graphics.RotateTransform(30.0F);

    // Then to scale, prepending to world transform.
    e.Graphics.ScaleTransform(3.0F, 1.0F);

    // Draw scaled, rotated rectangle to screen.
    e.Graphics.DrawRectangle(new Pen(Color.Blue, 3), 50, 0, 100, 40);
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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