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Last active April 19, 2024 11:59
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C# image utilities
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
public static class ImageUtil
{
public static Image Resize(this Image image, int width, int height)
{
var destRect = new Rectangle(0, 0, width, height);
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 static byte[] ToByteArray(this Image image, ImageFormat format)
{
using var ms = new MemoryStream();
image.Save(ms, format);
return ms.ToArray();
}
}
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