"SharpCoderMP" wrote:

> if you are drawing the image yourself then use Graphics.ScaleTransform()
> method to draw it again with the same code but with a different scale.
>
>
> Vinko wrote:
> > Hello!
> >
> > I've created an image of 5x5 pixels size and put red diagonal line from
> > point 0,0 to point 5,5.
> > I want to zoom that image for any scale factor (in attached example 15x).
> > Interpolation mode
> > is set to NearestNeighbor. Why entirely image is not scaled properly, first
> > pixel and last pixel of
> > diagonal are hlaf size than others? Why?
> >
> > int DefaultWidth = 5;
> > int DefaultHeight = 5;
> > int ScaleFactor = 15;
> >
> > // image with diagonal
> > pictureBox1.Image = new Bitmap(DefaultWidth, DefaultHeight);
> > Graphics g1 = Graphics.FromImage(pictureBox1.Image);
> > g1.Clear(Color.White);
> > g1.DrawLine(new Pen(Color.Red, 1), new Point(0, 0), new Point(4,
> > 4));
> > g1.Dispose();
> >
> > // scaled image
> > int newWidth = DefaultWidth * ScaleFactor;
> > int newHeight = DefaultHeight * ScaleFactor;
> > pictureBox2.Image = new Bitmap(newWidth, newHeight);
> > Graphics g2 = Graphics.FromImage(pictureBox2.Image);
> > Rectangle srcRect = new Rectangle(0, 0, DefaultWidth,
> > DefaultHeight);
> > Rectangle destRect = new Rectangle(0, 0, newWidth, newHeight);
> > g2.InterpolationMode = InterpolationMode.NearestNeighbor;
> > g2.Clear(Color.White);
> > g2.DrawImage(pictureBox1.Image, destRect, srcRect,
> > GraphicsUnit.Pixel);
> > g2.Dispose();
> >
> >
> > Please help.
> >
> > Thank you
> > Saso
> >
> >