C# ajouter un calque d'une image

Ici est celle que j'ai faite plus haut, qui crée un nouveau badge pour quelques images:

MODIFIER, j'ai conçu la fonction qui j'offre un maxWidth et maxHeight, il redimensionne sans distorsion.

Exigences:

using System.IO;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

Le Code

    using (Image i = Image.FromFile(HttpContext.Current.Server.MapPath(fileName)))
{
float imageWidth = i.PhysicalDimension.Width;
float imageHeight = i.PhysicalDimension.Height;
float percentage = maxWidth / imageWidth;
float newWidth = imageWidth * percentage;
float newHeight = imageHeight * percentage;
if (newHeight > maxHeight)
{
percentage = maxHeight / newHeight;
newWidth = newWidth * percentage;
newHeight = newHeight * percentage;
}
using (Bitmap b = new Bitmap((int)newWidth, (int)newHeight))
{
using (Graphics g = Graphics.FromImage(b))
{
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.SmoothingMode = SmoothingMode.AntiAlias;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.CompositingQuality = CompositingQuality.HighQuality;
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
g.DrawImage(i, new Rectangle(0, 0, b.Width, b.Height));
if (effect == "new")
{
using (Image j = Image.FromFile(HttpContext.Current.Server.MapPath("/ImageEffects/") + "new.png", true))
{
g.DrawImage(j, new Rectangle(0, 0, 60, 60));
}
}
Image newImage = Image.FromHbitmap(b.GetHbitmap());
return newImage;
}
}
}
}