You can create a TextureBrush from your image, then build a polygon of the
shape you desire and use FillPolygon.

for example:

protected override void OnPaint( PaintEventArgs e )
{
Image image = image.FromFile( "myImage.jpg" );
TextureBrush textureBrush = new TextureBrush( image );

Point[] points = new Point[ 4 ];

// Code assumes an image of 256x256 pixels...
points[ 0 ] = new Point( 32, 32 );
points[ 1 ] = new Point( 32 + 256 + 256, 32 ); // Move this one
corner
points[ 2 ] = new Point( 32 + 256, 32 + 256 );
points[ 3 ] = new Point( 32, 32 + 256 );

e.Graphics.FillPolygon( textureBrush, points );

base.OnPaint( e );
}

I'm assuming that's what you want, and I know this code would be incredibly
slow ;o Just an example.

n!