/// <summary>
/// Converts an <see cref="Image"/> to a Base64 <see cref="String"/>.
/// </summary>
/// <param name="image">The <see cref="Image"/> instance to convert.</param>
/// <returns>A Base64 <see cref="String"/> instance of the image.</returns>
/// <exception cref="ArgumentNullException">thrown if the <paramref name="image"/> is <c>Null</c>.</exception>
public static string ToBase64(this Image image)
{
if (image.IsNull())
{
throw new ArgumentNullException(nameof(image));
}
return(image.ToBase64(new System.Drawing.Imaging.ImageFormat(image.RawFormat.Guid)));
}
/// <summary>
/// Converts an <see cref="Image"/> to a basic SVG format.
/// </summary>
/// <param name="image">The <see cref="Image"/> instance to convert.</param>
/// <returns>A <see cref="String"/> containing formatted SVG image.</returns>
/// <exception cref="ArgumentNullException">thrown if the <paramref name="image"/> is <c>Null</c>.</exception>
public static string ToSVG(this Image image)
{
if (image.IsNull())
{
throw new ArgumentNullException(nameof(image));
}
string base64 = image.ToBase64();
StringBuilder result = new StringBuilder();
result.AppendLine(@"<?xml version=""1.0"" encoding=""utf-8"" ?>");
result.AppendLine($@"<svg version=""1.1"" id=""Layer_1"" xmlns=""http://www.w3.org/2000/svg"" xmlns:xlink=""http://www.w3.org/1999/xlink"" x=""0px"" y=""0px"" viewBox=""0 0 {image.Width} {image.Height}"" style=""enable-background:new 0 0 {image.Width} {image.Height};"" xml:space=""preserve"">");
result.AppendLine($@"<image style=""overflow:visible;"" width=""{image.Width}"" height=""{image.Height}"" xlink:href=""data:image/png;base64,{base64}"" ></image>");
result.AppendLine("</svg>");
return(result.ToString());
}
/// <summary>
/// Converts an <see cref="Image"/> to a Base64 <see cref="String"/>.
/// </summary>
/// <param name="image">The <see cref="Image"/> instance to convert.</param>
/// <param name="format">A value of <see cref="System.Drawing.Imaging.ImageFormat"/> indicating the format of the <paramref name="image"/>.</param>
/// <returns>A Base64 <see cref="String"/> instance of the image.</returns>
/// <exception cref="ArgumentNullException">thrown if the <paramref name="image"/> is <c>Null</c>.</exception>
public static string ToBase64(this Image image, System.Drawing.Imaging.ImageFormat format)
{
if (image.IsNull())
{
throw new ArgumentNullException(nameof(image));
}
using (MemoryStream stream = new MemoryStream())
{
// Convert Image to byte[]
image.Save(stream, format);
byte[] imageBytes = stream.ToArray();
// Convert byte[] to Base64 String
string base64String = Convert.ToBase64String(imageBytes);
return(base64String);
}
}
