CODEWITHSUNDEEP
c#graphics
sooprise
sooprise

Reputation: 23187

Resizing Image From Graphics?

I'm trying to resize my image after copying it from the screen, and can't figure out how to do it. The tutorials I've been reading recommend using Graphics.DrawImage to resize the image, but when I run this code, it doesn't resize. 

Bitmap b = new Bitmap(control.Width, control.Height);
Graphics g = Graphics.FromImage(b);
g.CopyFromScreen(control.Parent.RectangleToScreen(control.Bounds).X, control.Parent.RectangleToScreen(control.Bounds).Y, 0, 0, new Size(control.Bounds.Width, control.Bounds.Height), CopyPixelOperation.SourceCopy);

g.DrawImage(b, 0,0,newWidth, newHeight);

Any help would be appreciated, thanks!

Upvotes: 4

Views: 7455

Answers (2)

Jamie Treworgy
Jamie Treworgy

Reputation: 24344

Try this. Graphics won't "replace" the image when you use DrawImage - it draws the input image on its source, which is the same as the the image you're trying to draw to it.

Probably a more concise way to do this but.....

Bitmap b = new Bitmap(control.Width, control.Height);
using (Graphics g = Graphics.FromImage(b)) {
   g.CopyFromScreen(control.Parent.RectangleToScreen(control.Bounds).X, 
      control.Parent.RectangleToScreen(control.Bounds).Y, 0, 0, 
      new Size(control.Bounds.Width, control.Bounds.Height),
      CopyPixelOperation.SourceCopy);
}
Bitmap output = new Bitmap(newWidth, newHeight);
using (Graphics g = Graphics.FromImage(output)) {
  g.DrawImage(b, 0,0,newWidth, newHeight);
}

Upvotes: 6

RQDQ
RQDQ

Reputation: 15579

Is there any reason why you can't just use a PictureBox control? That control takes care of stretching for you.

Upvotes: 0

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