// </snippet4>
// Snippet for: M:System.Drawing.Imaging.ImageAttributes.SetNoOp
// <snippet5>
private void SetNoOpExample(PaintEventArgs e)
{
// Create an Image object from the file Camera.jpg.
Image myImage = Image.FromFile("Camera.jpg");
// Create an ImageAttributes object, and set the gamma to 0.25.
ImageAttributes imageAttr = new ImageAttributes();
imageAttr.SetGamma(0.25f);
// Draw the image with gamma set to 0.25.
Rectangle rect1 = new Rectangle(20, 20, 200, 200);
e.Graphics.DrawImage(myImage, rect1, 0, 0, 200, 200,
GraphicsUnit.Pixel, imageAttr);
// Call the ImageAttributes NoOp method.
imageAttr.SetNoOp();
// Draw the image after NoOp is set, so the default gamma value
// of 1.0 will be used.
Rectangle rect2 = new Rectangle(250, 20, 200, 200);
e.Graphics.DrawImage(myImage, rect2, 0, 0, 200, 200,
GraphicsUnit.Pixel, imageAttr);
}
private void SetNoOp_Click(object sender,
System.EventArgs e)
{
// Create a Graphics object
Graphics g = this.CreateGraphics();
g.Clear(this.BackColor);
// Create two colors
Color lClr = Color.FromArgb(245, 0, 0);
Color uClr = Color.FromArgb(255, 0, 0);
// Create ImageAttributes object
ImageAttributes ImgAttr = new ImageAttributes();
// Set ColorKey
ImgAttr.SetColorKey(lClr, uClr,
ColorAdjustType.Default);
// Set gamma
ImgAttr.SetGamma(2.0f, ColorAdjustType.Default);
// Set NoOp
ImgAttr.SetNoOp(ColorAdjustType.Default);
// Create an Image object
Image curImage = Image.FromFile("dnWatcher.gif");
// Draw Image
Rectangle rect = new Rectangle(0, 0, 400, 400);
g.DrawImage(curImage, rect, 0, 0, 400, 400,
GraphicsUnit.Pixel, ImgAttr);
// Dispose
g.Dispose();
}