public static Bitmap ScaleImage(NRandom rsz_rng, Image image, int width, int height)
{
float aspectRatio = (float)image.Width / image.Height;
float height_var = (height - (int)(height * aspectRatio)) * 0.8f;
float width_var = (width - (int)(width / aspectRatio)) * 0.8f;
var destRect = new Rectangle((int)(height_var * rsz_rng.NextDouble()), 0, (int)(height * aspectRatio), width);
if (aspectRatio > 1.0f)
{
destRect = new Rectangle(0, (int)(width_var * rsz_rng.NextDouble()), height, (int)(width / aspectRatio));
}
var destImage = new Bitmap(width, height);
destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
using (var graphics = Graphics.FromImage(destImage))
{
graphics.CompositingMode = CompositingMode.SourceCopy;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
using (var wrapMode = new ImageAttributes())
{
wrapMode.SetWrapMode(WrapMode.TileFlipXY);
graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
}
}
return(destImage);
}
public NRandom(NRandom r)
{
this.seed = r.seed;
lock_obj = new object();
}