public static async Task <RasterImage> RasterImageFromFile(string file, bool loadAllPages = false, int firstPageNumber = 1, int lastPageNumber = 1)
{
RasterImage rasterImage = null;
using (var codecs = new RasterCodecs())
{
codecs.Options.Png.Save.QualityFactor = 10;
codecs.Options.RasterizeDocument.Load.Resolution = 300;
codecs.Options.Load.Resolution = 300;
codecs.Options.Load.AllPages = loadAllPages;
using (var inputStream = LeadStream.Factory.OpenFile(file))
{
rasterImage = await codecs.LoadAsync(inputStream, 0, CodecsLoadByteOrder.Bgr, firstPageNumber, lastPageNumber);
if (rasterImage.ViewPerspective != RasterViewPerspective.TopLeft)
{
rasterImage.ChangeViewPerspective(RasterViewPerspective.TopLeft);
}
}
}
return(rasterImage);
}