/// <summary>
///
/// </summary>
/// <param name="options"></param>
/// <returns></returns>
public async Task <string> CropAsync(ImageOptions options)
{
var fileName = options.CroppedImageFileNameScheme.Invoke(this);
var filePath = Path.Combine(options.CombinedImageDirectory, fileName);
var filePhysicalPath = Path.Combine(options.RootDirectory, filePath).Replace('/', Path.DirectorySeparatorChar);
Path.GetDirectoryName(filePhysicalPath).CreateDirectory();
if (!File.Exists(filePhysicalPath))
{
var imageAbsolutePath = ImagePath.PreProcess(options.RootDirectory);
if (!(await ImageHelper.FromFileOrNetworkAsync(imageAbsolutePath) is Bitmap image))
{
return(string.Empty);
}
using var path = new GraphicsPath();
path.AddLine(new Point(Left + Radius, Top), new Point(Left + Width - Radius, Top));
path.AddArc(new Rectangle(Left + Width - Radius - Radius, Top, Radius * 2, Radius * 2), -90, 90);
path.AddLine(new Point(Left + Width, Top + Radius), new Point(Left + Width, Top + Height - Radius));
path.AddArc(new Rectangle(Left + Width - Radius - Radius, Top + Height - Radius - Radius, Radius * 2, Radius * 2), 0, 90);
path.AddLine(new Point(Left + Width - Radius, Top + Height), new Point(Left + Radius, Top + Height));
path.AddArc(new Rectangle(Left, Top + Height - Radius - Radius, Radius * 2, Radius * 2), 90, 90);
path.AddLine(new Point(Left, Top + Height - Radius), new Point(Left, Top + Radius));
path.AddArc(new Rectangle(Left, Top, Radius * 2, Radius * 2), 180, 90);
var output = new Bitmap(Width, Height);
for (int i = Left; i < Left + Width; i++)
{
for (int j = Top; j < Top + Height; j++)
{
output.SetPixel(i - Left, j - Top, path.IsVisible(i, j) ? image.GetPixel(i, j) : Color.Transparent);
}
}
using (output)
output.CompressSave(filePhysicalPath, options.CompressFlag, ImageFormat.Png);
}
return(filePath);
}
