public async Task <Bitmap> RenderThumbnail(ScannedImage.Snapshot snapshot, int size)
{
using (var bitmap = await scannedImageRenderer.Render(snapshot, snapshot.TransformList.Count == 0 ? 0 : size *OVERSAMPLE))
{
return(RenderThumbnail(bitmap, size));
}
}
public async Task <Stream> RenderToStream(ScannedImage.Snapshot snapshot)
{
using (var transformed = await Render(snapshot))
{
var stream = new MemoryStream();
var format = transformed.PixelFormat == PixelFormat.Format1bppIndexed
? ImageFormat.Png
: snapshot.Source.FileFormat ?? (snapshot.Source.RecoveryIndexImage.HighQuality ? ImageFormat.Png : ImageFormat.Jpeg);
transformed.Save(stream, format);
return(stream);
}
}
public async Task <Bitmap> Render(ScannedImage.Snapshot snapshot, int outputSize = 0)
{
return(await Task.Factory.StartNew(() =>
{
var bitmap = snapshot.Source.FileFormat == null
? pdfRenderer.Render(snapshot.Source.RecoveryFilePath).Single()
: new Bitmap(snapshot.Source.RecoveryFilePath);
if (outputSize > 0)
{
bitmap = ShrinkBitmap(bitmap, outputSize);
}
return Transform.PerformAll(bitmap, snapshot.TransformList);
}));
}
