Fading an Image Away

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Introduction

While working on my new project (chronology control) I needed the ability to differentiate between more and less important parts of data. My idea was to put more important parts of data to the center of screen and have less important part fade away.

Surprisingly enough, I didn't find a quick and simple solution to the problem of gradually fading away the bitmap, anywhere on the net. Thus disregarding the danger of my short-n-cute article being stigmatized as "yet another LinearGradientBrush derivate", I decided to share this neat trick with you.

How to Fade an Image Away

Technically, from alpha 0 and RGB(0,0,0) to alpha 255 and the background color.

// Preconditions: image, graphics and backColor initialized
Rectangle imageRect=new Rectangle(0,0,image.Width,image.Height);
// Place it on the window.
graphics.DrawImage(image,imageRect);
// Create gradient brush from black to window's back color.
LinearGradientBrush brush=new
LinearGradientBrush(new Rectangle(0,0,image.Width,image.Height),
    Color.FromArgb(0,0,0,0),
    backColor,
    0,false);
// And paint it over image...
e.Graphics.FillRectangle(brush,imageRect);
// ...voila!

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