/// <summary>
/// Queues an update corresponding to one region of the framebuffer being copied to another.
/// </summary>
/// <param name="target">
/// The updated <see cref="VncRectangle"/>.
/// </param>
/// <param name="sourceX">
/// The X coordinate of the source.
/// </param>
/// <param name="sourceY">
/// The Y coordinate of the source.
/// </param>
/// <remarks>
/// Do not call this method without holding <see cref="VncServerSession.FramebufferUpdateRequestLock"/>.
/// </remarks>
public void FramebufferManualCopyRegion(VncRectangle target, int sourceX, int sourceY)
{
if (!this.clientEncoding.Contains(VncEncoding.CopyRect))
{
var source = new VncRectangle(sourceX, sourceY, target.Width, target.Height);
var region = VncRectangle.Union(source, target);
if (region.Area > source.Area + target.Area)
{
this.FramebufferManualInvalidate(new[] { source, target });
}
else
{
this.FramebufferManualInvalidate(region);
}
return;
}
var contents = new byte[4];
VncUtility.EncodeUInt16BE(contents, 0, (ushort)sourceX);
VncUtility.EncodeUInt16BE(contents, 2, (ushort)sourceY);
this.AddRegion(target, VncEncoding.CopyRect, contents);
}
/// <inheritdoc/>
public override void Send(Stream stream, VncPixelFormat pixelFormat, VncRectangle region, byte[] contents)
{
this.buffer.SetLength(0);
this.deflater.Write(contents, 0, contents.Length);
this.deflater.Flush();
this.buffer.Position = 0;
byte[] length = new byte[4];
VncUtility.EncodeUInt32BE(length, 0, (uint)this.buffer.Length);
stream.Write(length, 0, 4);
this.buffer.CopyTo(stream);
}
/// <inheritdoc/>
public void FramebufferManualInvalidate(VncRectangle region)
{
var fb = this.Framebuffer;
var cpf = this.clientPixelFormat;
region = VncRectangle.Intersect(region, new VncRectangle(0, 0, this.clientWidth, this.clientHeight));
if (region.IsEmpty)
{
return;
}
int x = region.X, y = region.Y, w = region.Width, h = region.Height, bpp = cpf.BytesPerPixel;
var contents = new byte[w * h * bpp];
VncPixelFormat.Copy(
fb.GetBuffer(),
fb.Width,
fb.Stride,
fb.PixelFormat,
region,
contents,
w,
w * bpp,
cpf);
#if DEFLATESTREAM_FLUSH_WORKS
if (_clientEncoding.Contains(VncEncoding.Zlib))
{
_zlibMemoryStream.Position = 0;
_zlibMemoryStream.SetLength(0);
_zlibMemoryStream.Write(new byte[4], 0, 4);
if (_zlibDeflater == null)
{
_zlibMemoryStream.Write(new[] { (byte)120, (byte)218 }, 0, 2);
_zlibDeflater = new DeflateStream(_zlibMemoryStream, CompressionMode.Compress, false);
}
_zlibDeflater.Write(contents, 0, contents.Length);
_zlibDeflater.Flush();
contents = _zlibMemoryStream.ToArray();
VncUtility.EncodeUInt32BE(contents, 0, (uint)(contents.Length - 4));
AddRegion(region, VncEncoding.Zlib, contents);
}
else
#endif
{
this.AddRegion(region, VncEncoding.Raw, contents);
}
}
/// <inheritdoc/>
public void FramebufferManualInvalidate(VncRectangle region)
{
var fb = this.Framebuffer;
var cpf = this.clientPixelFormat;
region = VncRectangle.Intersect(region, new VncRectangle(0, 0, this.clientWidth, this.clientHeight));
if (region.IsEmpty)
{
return;
}
int x = region.X, y = region.Y, w = region.Width, h = region.Height, bpp = cpf.BytesPerPixel;
var contents = new byte[w * h * bpp];
VncPixelFormat.Copy(
fb.GetBuffer(),
fb.Width,
fb.Stride,
fb.PixelFormat,
region,
contents,
w,
w * bpp,
cpf);
if (clientEncoding.Contains(VncEncoding.Zlib))
{
byte[] zlibContents = Compress(contents);
var lenArray = new byte[4];
VncUtility.EncodeUInt32BE(lenArray, 0, (uint)(zlibContents.Length));
var finArray = Combine(lenArray, zlibContents);
AddRegion(region, VncEncoding.Zlib, finArray);
}
else
{
this.AddRegion(region, VncEncoding.Raw, contents);
}
}
