C# image whitespace

Question

Hi there,

I have an image that is 240x320 (iphone camera image in portrait), and I need to programmatically (in C#) add white "bars" to the sides increasing the full image size to 320x320. I don't want to scale the image because that would mess up the aspect ratio.

I have found a lot of info about how to remove white bars with c#, but nothing about how to add them. I am at a loss. Does anyone have any input that might lead me the correct direction?

Thanks a bunch, Brett

Answer 1

Create a new empty white bitmap of the desired size and blit the smaller image onto it.

Answer 2

Basically create a new bitmap with the required dimension, clear it with the color you want and then draw the smaller bitmap so that it is centered vertically.

Answer 3

Image src = Image.FromFile("picture.jpg");
Bitmap bmp = new Bitmap(320, 320);
Graphics g = Graphics.FromImage(bmp);
g.Clear(Color.White)
g.DrawImageUnscaled(src, 60, 0, 240, 320);
bmp.Save("file.jpg", ImageFormat.Jpeg);

Remember to dispose the object after use ;)