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Graphics.DrawImage Method (Image, PointF[], RectangleF, 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 PointF, _
   ByVal srcRect As RectangleF, _
   ByVal srcUnit As GraphicsUnit _
)
[C#]
public void DrawImage(
 Image image,
 PointF[] destPoints,
 RectangleF srcRect,
 GraphicsUnit srcUnit
);
[C++]
public: void DrawImage(
 Image* image,
 PointF destPoints[],
 RectangleF srcRect,
 GraphicsUnit srcUnit
);
[JScript]
public function DrawImage(
   image : Image,
 destPoints : PointF[],
 srcRect : RectangleF,
 srcUnit : GraphicsUnit
);

Parameters

image: Image object to draw.
destPoints: Array of three PointF 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 PointF 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 destination parallelogram in which to draw the image.
Creates a source rectangle from which to extract a portion of the image.
Sets the unit of measure of the source rectangle to pixels.
Draws the image to the screen.

[Visual Basic, C#] The position of the destination parallelogram locates the image on the screen, the size of the source rectangle and the size and shape of the destination parallelogram determines the scaling and shearing of the drawn image, and the size of the rectangle determines what portion of the original image is drawn to the screen.

[Visual Basic] 
Public Sub DrawImageParaFRectF(e As PaintEventArgs)
' Create image.
Dim newImage As Image = Image.FromFile("SampImag.jpg")
' Create parallelogram for drawing image.
Dim ulCorner As New PointF(100F, 100F)
Dim urCorner As New PointF(550F, 100F)
Dim llCorner As New PointF(150F, 250F)
Dim destPara As PointF() =  {ulCorner, urCorner, llCorner}
' Create rectangle for source image.
Dim srcRect As New RectangleF(50F, 50F, 150F, 150F)
Dim units As GraphicsUnit = GraphicsUnit.Pixel
' Draw image to screen.
e.Graphics.DrawImage(newImage, destPara, srcRect, units)
End Sub
        
[C#] 
public void DrawImageParaFRectF(PaintEventArgs e)
{
// Create image.
Image newImage = Image.FromFile("SampImag.jpg");
// Create parallelogram for drawing image.
PointF ulCorner = new PointF(100.0F, 100.0F);
PointF urCorner = new PointF(550.0F, 100.0F);
PointF llCorner = new PointF(150.0F, 250.0F);
PointF[] destPara = {ulCorner, urCorner, llCorner};
// Create rectangle for source image.
RectangleF srcRect = new RectangleF( 50.0F, 50.0F, 150.0F, 150.0F);
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 in the upper-left corner of the page.

Requirements