public static async Task GetTileAsPngToStreamAsync(this DeepZoomGenerator dz, int level, int locationX, int locationY, Stream stream)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
var tileInfo = dz.GetTileInfo(level, locationX, locationY);
using (var image = new Image <Bgra32>((int)tileInfo.Width, (int)tileInfo.Height))
{
WriteImage(dz, image, tileInfo);
byte[] buffer = ArrayPool <byte> .Shared.Rent(EnsureMinimumSize(tileInfo.TileWidth *tileInfo.TileHeight * 4 * 2));
try
{
using (var ms = new MemoryStream(buffer))
{
image.SaveAsPng(ms);
ms.SetLength(ms.Position);
ms.Position = 0;
await ms.CopyToAsync(stream).ConfigureAwait(false);
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
}
}
}
public static void GetTileAsJpegToStream(this DeepZoomGenerator dz, int level, int locationX, int locationY, Stream stream, int quality = 75)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
var tileInfo = dz.GetTileInfo(level, locationX, locationY);
using (var image = new Image <Bgra32>((int)tileInfo.Width, (int)tileInfo.Height))
{
WriteImage(dz, image, tileInfo);
byte[] buffer = ArrayPool <byte> .Shared.Rent(EnsureMinimumSize(tileInfo.TileWidth *tileInfo.TileHeight * 4 * 2));
try
{
using (var ms = new MemoryStream(buffer))
{
image.SaveAsJpeg(ms, new JpegEncoder()
{
Quality = quality
});
ms.SetLength(ms.Position);
ms.Position = 0;
ms.CopyTo(stream);
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
}
}
}
public static byte[] GetTileAsPng(this DeepZoomGenerator dz, int level, int locationX, int locationY, out TileInfo info)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
var tileInfo = dz.GetTileInfo(level, locationX, locationY);
info = tileInfo;
using (var image = new Image <Bgra32>((int)tileInfo.Width, (int)tileInfo.Height))
{
WriteImage(dz, image, tileInfo);
byte[] buffer = ArrayPool <byte> .Shared.Rent(EnsureMinimumSize(tileInfo.TileWidth *tileInfo.TileHeight * 4 * 2));
try
{
using (var ms = new MemoryStream(buffer))
{
image.SaveAsPng(ms);
ms.SetLength(ms.Position);
return(ms.ToArray());
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
}
}
}
public static void GetTileAsPngToStream(this DeepZoomGenerator dz, int level, int locationX, int locationY, MemoryStream stream)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
var info = dz.GetTileInfo(level, locationX, locationY);
using var image = ReadImage(dz, info);
image.SaveAsPng(stream);
}
public static byte[] GetTileAsPng(this DeepZoomGenerator dz, int level, int locationX, int locationY, out TileInfo info)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
info = dz.GetTileInfo(level, locationX, locationY);
using var image = ReadImage(dz, info);
using var ms = PooledMemoryStreamManager.Shared.GetStream();
image.SaveAsPng(ms);
return(ms.ToArray());
}
private static Image <Bgra32> ReadImage(DeepZoomGenerator src, TileInfo tileInfo)
{
using var buffer = src.Image.ReadImageBuffer(tileInfo.SlideLevel, tileInfo.X, tileInfo.Y, tileInfo.Width, tileInfo.Height);
if (tileInfo.Width != tileInfo.TileWidth || tileInfo.Height != tileInfo.TileHeight)
{
return(buffer.GetImage().Clone(ctx =>
{
ctx.Resize(tileInfo.TileWidth, tileInfo.TileHeight);
}));
}
else
{
return(buffer.GetImage().Clone());
}
}
public static async Task GetTileAsPngToStreamAsync(this DeepZoomGenerator dz, int level, int locationX, int locationY, Stream stream, CancellationToken cancellationToken = default)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
var info = dz.GetTileInfo(level, locationX, locationY);
using var image = ReadImage(dz, info);
using var ms = PooledMemoryStreamManager.Shared.GetStream();
image.SaveAsPng(ms);
ms.Seek(0, SeekOrigin.Begin);
await ms.CopyToAsync(stream, 4096, cancellationToken).ConfigureAwait(false);
}
public static void GetTileAsPngToStream(this DeepZoomGenerator dz, int level, int locationX, int locationY, Stream stream)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
var info = dz.GetTileInfo(level, locationX, locationY);
using var image = ReadImage(dz, info);
using var ms = PooledMemoryStreamManager.Shared.GetStream();
image.SaveAsPng(ms);
ms.Seek(0, SeekOrigin.Begin);
ms.CopyTo(stream);
}
private static void WriteImage(DeepZoomGenerator src, Image <Bgra32> dest, TileInfo tileInfo)
{
src.Image.ReadRegion(
tileInfo.SlideLevel, tileInfo.X, tileInfo.Y, tileInfo.Width, tileInfo.Height,
ref Unsafe.As <Bgra32, byte>(ref MemoryMarshal.GetReference(dest.GetPixelSpan())));
dest.Mutate(ctx =>
{
if (tileInfo.ResizeNeeded)
{
ctx.Resize(tileInfo.TileWidth, tileInfo.TileHeight);
tileInfo.ResizeNeeded = false;
}
});
}
public static void GetTileAsPngToStream(this DeepZoomGenerator dz, int level, int locationX, int locationY, MemoryStream stream)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
var tileInfo = dz.GetTileInfo(level, locationX, locationY);
using (var image = new Image <Bgra32>((int)tileInfo.Width, (int)tileInfo.Height))
{
WriteImage(dz, image, tileInfo);
image.SaveAsPng(stream);
}
}
private static void WriteImage(DeepZoomGenerator src, Image <Bgra32> dest, TileInfo tileInfo)
{
var frame = dest.Frames.RootFrame;
src.Image.DangerousReadRegion(
tileInfo.SlideLevel, tileInfo.X, tileInfo.Y, tileInfo.Width, tileInfo.Height,
ref Unsafe.As <Bgra32, byte>(ref frame.DangerousGetPinnableReferenceToPixelBuffer()));
dest.Mutate(ctx =>
{
if (tileInfo.ResizeNeeded)
{
ctx.Resize(tileInfo.TileWidth, tileInfo.TileHeight);
tileInfo.ResizeNeeded = false;
}
});
}
public static void GetTileAsJpegToStream(this DeepZoomGenerator dz, int level, int locationX, int locationY, MemoryStream stream, int quality = 75)
{
if (dz == null)
{
throw new ArgumentNullException(nameof(dz));
}
var tileInfo = dz.GetTileInfo(level, locationX, locationY);
using (var image = new Image <Rgba32>((int)tileInfo.Width, (int)tileInfo.Height))
{
WriteImage(dz, image, tileInfo);
image.SaveAsJpeg(stream, new JpegEncoder()
{
Quality = quality
});
}
}
