Click here to Skip to main content
Click here to Skip to main content
Go to top

Image Reflection

, 8 Jun 2009
Rate this:
Please Sign up or sign in to vote.
Learn how to generate a reflection from your selected image
GDI__Glass_Reflection

Introduction

This source code will teach you how to create a simple GDI+ Glass Reflection effect in C#.NET.   

The Codes  

Make sure to include these namespaces:

System.Drawing; 
System.Drawing.Drawing2D; 
System.Drawing.Imaging;

Here's the DrawImage code. It gets the image from the pictureBox1, then creates a reflection.

private static Image DrawReflection(Image img,Color toBG) // img is the original image.
{
    //This is the static function that generates the reflection...
    int height = img.Height + 100; //Added height from the original height of the image.
    Bitmap bmp = new Bitmap(img.Width, height, PixelFormat.Format64bppPArgb); //A new 
								//bitmap.
    //The Brush that generates the fading effect to a specific color of your background.
    Brush brsh = new LinearGradientBrush(new Rectangle(0, 0, img.Width + 10, 
      height), Color.Transparent, toBG, LinearGradientMode.Vertical);
    bmp.SetResolution(img.HorizontalResolution, img.VerticalResolution); //Sets the new 
							//bitmap's resolution.
    using(Graphics grfx = Graphics.FromImage(bmp)) //A graphics to be generated 
			//from an image (here, the new Bitmap we've created (BMP)).
     {
        Bitmap bm = (Bitmap)img; //Generates a bitmap from the original image (img).
        grfx.DrawImage(bm, 0, 0, img.Width, img.Height); //Draws the generated 
					//bitmap (bm) to the new bitmap (bmp).
        Bitmap bm1 = (Bitmap)img; 	//Generates a bitmap again 
				//from the original image (img).
        bm1.RotateFlip(RotateFlipType.Rotate180FlipX); //Flips and rotates the 
						//image (bm1).
        grfx.DrawImage(bm1, 0, img.Height); 	//Draws (bm1) below (bm) so it serves 
					//as the reflection image.
        Rectangle rt = new Rectangle(0, img.Height, img.Width, 100); //A new rectangle 
						//to paint our gradient effect.
        grfx.FillRectangle(brsh, rt); //Brushes the gradient on (rt).
     }
    return bmp; //Returns the (bmp) with the generated image.
}

Now after creating this function, use it to change the image of the picturebox through a click event or other events.

private void controlname_click(Object sender, EventArgs e)
{
pictureBox1.Image = DrawReflection(pictureBox1.Image, Color.Black);
}

This code changes the current pictureBox1's image to the image generated by the DrawReflection.  

How Does It Work?

This is the result if the image is not painted with gradient.

Image_without_gradient.png

Explanation for the gradient:

Image.png

The flipped image below the original image has a fading effect because of the gradient we painted on it. The starting color is Transparent. We can see the image below it. And as it goes down, it changes to color black, which is the color of the form, so the lower portion of the image blends with the background color, creating a fading effect.

What Problems Does This Solution Solve?

I made this solution so that beginner coders could better understand the Image Reflection in C#.NET. It is made in the Main Form's class. 

How Does This Help Someone?

This helps better understanding of the usage of the System.Drawing classes and functions.

History

  • 6/03/09 - Initial release (this source code)

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

John Espiritu
Software Developer (Junior) Team Console
Philippines Philippines
Coding just for fun and learning.
 
I started learning programming using MS Access' VBA codes, then VB6, VB.NET, C#, and Java. I am more accustomed in programming with the .NET framework.
 
I'm currently a B.S Computer Science student studying at STI College Bacoor, Philippines.. An institute that specializes in IT.
Follow on   Twitter

Comments and Discussions

 
GeneralMy vote of 5 Pinmemberwalterhevedeich26-May-11 18:48 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web01 | 2.8.140926.1 | Last Updated 8 Jun 2009
Article Copyright 2009 by John Espiritu
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid