Agrandissement des icones météo en remplaçant chaque pixel par un carré de 4 pixels de même couleur.

PixelX2.cs

using System.Drawing;
using System.Drawing.Imaging;

namespace PixelX2
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int w = 0; w < 48; w++)
            {
                Loop(w);
            }
        }

        static void Loop(int weather)
        {
            var icon_gif = string.Format(@"C:\MVC\Pif\Pif\Content\img\meteo2\{0}.gif", weather);
            var image = Image.FromFile(icon_gif);

            var width = image.Width;
            var height = image.Height;

            var from_55_45 = new Bitmap(image, width, height);
            var to_110_90 = new Bitmap(width * 2, height * 2);

            for (var x = 0; x < width; x++)
            {
                for (var y = 0; y < height; y++)
                {
                    var c = from_55_45.GetPixel(x, y);
                    var dx = x * 2;
                    var dy = y * 2;
                    to_110_90.SetPixel(dx, dy, c);
                    to_110_90.SetPixel(dx, dy + 1, c);
                    to_110_90.SetPixel(dx + 1, dy, c);
                    to_110_90.SetPixel(dx + 1, dy + 1, c);
                }
            }

            from_55_45.Dispose();
            image.Dispose();

            var icon_png = string.Format(@"C:\MVC\Pif\Pif\Content\img\meteo3\{0}.png", weather);
            to_110_90.Save(icon_png, ImageFormat.Png);
            to_110_90.Dispose();
        }
    }
}