static AnimatedImage()
{
Bitmap emptyBitmap = new Bitmap(1, 1);
emptyBitmap.SetPixel(0, 0, Color.Transparent);
emptyImage = new AnimatedImage(emptyBitmap);
}
/// <summary>
/// Initializes a new instance of the <see cref="Importer"/> class,
/// featuring support for the default image formats JPG/JPEG, PNG,
/// (animated) GIF, BMP and TIF/TIFF.
/// </summary>
public Importer()
{
ImportImage defaultImporter = delegate(string path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
Image source = Image.FromFile(path);
//Downscale big images right in the importer to improve
//performance (only if image is not animated).
double scaleFactor = Math.Min(1,
(double)MaxPixels / (source.Width * source.Height));
if (AnimatedImage.GetFrameCount(source) > 1 ||
scaleFactor == 1.0 ||
!DownscaleOversizedImages)
{
return(source);
}
try
{
Image image = new Bitmap((int)(source.Width * scaleFactor),
(int)(source.Height * scaleFactor));
using (Graphics graphics = Graphics.FromImage(image))
{
graphics.InterpolationMode =
InterpolationMode.HighQualityBicubic;
graphics.DrawImage(source, 0, 0, image.Width,
image.Height);
}
return(image);
}
finally
{
if (source != null)
{
source.Dispose();
}
}
};
importers.Add("jpg", defaultImporter);
importers.Add("jpeg", defaultImporter);
importers.Add("png", defaultImporter);
importers.Add("gif", defaultImporter);
importers.Add("bmp", defaultImporter);
importers.Add("tif", defaultImporter);
importers.Add("tiff", defaultImporter);
}