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Graphics.DrawImage Method (Image, Point[], Rectangle, GraphicsUnit)

.NET Framework 1.1

Draws the specified portion of the specified Image object at the specified location and with the specified size.

[Visual Basic]
Overloads Public Sub DrawImage( _
   ByVal image As Image, _
   ByVal destPoints() As Point, _
   ByVal srcRect As Rectangle, _
   ByVal srcUnit As GraphicsUnit _
)
[C#]
public void DrawImage(
 Image image,
 Point[] destPoints,
 Rectangle srcRect,
 GraphicsUnit srcUnit
);
[C++]
public: void DrawImage(
 Image* image,
 Point destPoints[],
 Rectangle srcRect,
 GraphicsUnit srcUnit
);
[JScript]
public function DrawImage(
   image : Image,
 destPoints : Point[],
 srcRect : Rectangle,
 srcUnit : GraphicsUnit
);

Parameters

image
Image object to draw.
destPoints
Array of three Point structures that define a parallelogram.
srcRect
Rectangle structure that specifies the portion of the image object to draw.
srcUnit
Member of the GraphicsUnit enumeration that specifies the units of measure used by the srcRect parameter.

Return Value

This method does not return a value.

Remarks

The destPoints parameter specifies three points of a parallelogram. The three Point structures represent the upper-left, upper-right, and lower-left corners of the parallelogram. The fourth point is extrapolated from the first three to form a parallelogram.

The srcRect parameter specifies a rectangular portion of the image object to draw. This portion is scaled and sheared to fit inside the parallelogram specified by the destPoints parameter.

Example

[Visual Basic, C#] The following 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:

  • Creates an image from a JPEG file SampImag.jpg in the folder of the example.
  • Creates points that define a parallelogram in which to draw the image.
  • Creates a rectangle to select the portion of the image to draw.
  • Sets the graphics drawing unit to pixel.
  • Draws the image to the screen.

[Visual Basic, C#] The position of the parallelogram locates the image on the screen, and the size of the rectangle and the size and shape of the parallelogram determines the scaling and shearing of the drawn image.

[Visual Basic] 
Public Sub DrawImageParaRect(e As PaintEventArgs)
' Create image.
Dim newImage As Image = Image.FromFile("SampImag.jpg")
' Create parallelogram for drawing image.
Dim ulCorner As New Point(100, 100)
Dim urCorner As New Point(325, 100)
Dim llCorner As New Point(150, 250)
Dim destPara As Point() =  {ulCorner, urCorner, llCorner}
' Create rectangle for source image.
Dim srcRect As New Rectangle(50, 50, 150, 150)
Dim units As GraphicsUnit = GraphicsUnit.Pixel
' Draw image to screen.
e.Graphics.DrawImage(newImage, destPara, srcRect, units)
End Sub
        
[C#] 
public void DrawImageParaRect(PaintEventArgs e)
{
// Create image.
Image newImage = Image.FromFile("SampImag.jpg");
// Create parallelogram for drawing image.
Point ulCorner = new Point(100, 100);
Point urCorner = new Point(325, 100);
Point llCorner = new Point(150, 250);
Point[] destPara = {ulCorner, urCorner, llCorner};
// Create rectangle for source image.
Rectangle srcRect = new Rectangle( 50, 50, 150, 150);
GraphicsUnit units = GraphicsUnit.Pixel;
// Draw image to screen.
e.Graphics.DrawImage(newImage, destPara, srcRect, units);
}
        

[C++, JScript] No example is available for C++ or JScript. To view a Visual Basic or C# example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

Graphics Class | Graphics Members | System.Drawing Namespace | Graphics.DrawImage Overload List

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