mirror of
https://github.com/Devolutions/IronRDP.git
synced 2025-08-04 15:18:17 +00:00
refactor(server): split UpdateEncoder
The bitmap encoder dispatching code was becoming convoluted and the same struct was handling PduEncoding and various bitmap encoding handling. Instead, split UpdateEncoder in different types and concerns. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau
Benoît Cortier
parent
a76e84d459
commit
c2164716c3
1 changed files with 137 additions and 77 deletions
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@ -28,44 +28,25 @@ const MAX_FASTPATH_UPDATE_SIZE: usize = 16_374;
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const FASTPATH_HEADER_SIZE: usize = 6;
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pub(crate) struct UpdateEncoder {
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buffer: Vec<u8>,
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bitmap: BitmapEncoder,
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remotefx: Option<(RfxEncoder, u8)>,
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update: for<'a> fn(&'a mut UpdateEncoder, BitmapUpdate) -> Result<UpdateFragmenter<'a>>,
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pdu_encoder: PduEncoder,
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bitmap_updater: BitmapUpdater,
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}
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impl UpdateEncoder {
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pub(crate) fn new(surface_flags: CmdFlags, remotefx: Option<(EntropyBits, u8)>) -> Self {
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let update = if !surface_flags.contains(CmdFlags::SET_SURFACE_BITS) {
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Self::bitmap_update
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let pdu_encoder = PduEncoder::new();
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let bitmap_updater = if !surface_flags.contains(CmdFlags::SET_SURFACE_BITS) {
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BitmapUpdater::Bitmap(BitmapHandler::new())
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} else if remotefx.is_some() {
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Self::remotefx_update
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let (algo, id) = remotefx.unwrap();
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BitmapUpdater::RemoteFx(RemoteFxHandler::new(algo, id))
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} else {
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Self::none_update
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BitmapUpdater::None(NoneHandler)
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};
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Self {
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buffer: vec![0; 16384],
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bitmap: BitmapEncoder::new(),
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remotefx: remotefx.map(|(algo, id)| (RfxEncoder::new(algo), id)),
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update,
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}
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}
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fn encode_pdu(&mut self, pdu: impl Encode) -> Result<usize> {
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loop {
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let mut cursor = WriteCursor::new(self.buffer.as_mut_slice());
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match pdu.encode(&mut cursor) {
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Err(e) => match e.kind() {
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ironrdp_core::EncodeErrorKind::NotEnoughBytes { .. } => {
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self.buffer.resize(self.buffer.len() * 2, 0);
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debug!("encoder buffer resized to: {}", self.buffer.len() * 2);
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}
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_ => Err(e).context("PDU encode error")?,
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},
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Ok(()) => return Ok(cursor.pos()),
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}
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pdu_encoder,
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bitmap_updater,
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}
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}
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@ -88,8 +69,8 @@ impl UpdateEncoder {
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xor_bpp: 32,
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color_pointer,
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};
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let len = self.encode_pdu(ptr)?;
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Ok(UpdateFragmenter::new(UpdateCode::NewPointer, &self.buffer[..len]))
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let buf = self.pdu_encoder.encode(ptr)?;
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Ok(UpdateFragmenter::new(UpdateCode::NewPointer, buf))
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}
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pub(crate) fn color_pointer(&mut self, ptr: ColorPointer) -> Result<UpdateFragmenter<'_>> {
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@ -105,8 +86,8 @@ impl UpdateEncoder {
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xor_mask: &ptr.xor_mask,
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and_mask: &ptr.and_mask,
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};
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let len = self.encode_pdu(ptr)?;
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Ok(UpdateFragmenter::new(UpdateCode::ColorPointer, &self.buffer[..len]))
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let buf = self.pdu_encoder.encode(ptr)?;
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Ok(UpdateFragmenter::new(UpdateCode::ColorPointer, buf))
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}
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#[allow(clippy::unused_self)]
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@ -120,31 +101,77 @@ impl UpdateEncoder {
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}
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pub(crate) fn pointer_position(&mut self, pos: PointerPositionAttribute) -> Result<UpdateFragmenter<'_>> {
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let len = self.encode_pdu(pos)?;
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Ok(UpdateFragmenter::new(UpdateCode::PositionPointer, &self.buffer[..len]))
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let buf = self.pdu_encoder.encode(pos)?;
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Ok(UpdateFragmenter::new(UpdateCode::PositionPointer, buf))
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}
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pub(crate) fn bitmap(&mut self, bitmap: BitmapUpdate) -> Result<UpdateFragmenter<'_>> {
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let update = self.update;
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update(self, bitmap)
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self.bitmap_updater.handle(bitmap, &mut self.pdu_encoder)
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}
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pub(crate) fn fragmenter_from_owned(&self, res: UpdateFragmenterOwned) -> UpdateFragmenter<'_> {
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UpdateFragmenter {
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code: res.code,
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index: res.index,
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data: &self.buffer[0..res.len],
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data: &self.pdu_encoder.buffer[0..res.len],
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}
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}
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}
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fn bitmap_update(&mut self, bitmap: BitmapUpdate) -> Result<UpdateFragmenter<'_>> {
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enum BitmapUpdater {
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None(NoneHandler),
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Bitmap(BitmapHandler),
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RemoteFx(RemoteFxHandler),
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}
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impl BitmapUpdater {
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fn handle<'a>(&mut self, bitmap: BitmapUpdate, encoder: &'a mut PduEncoder) -> Result<UpdateFragmenter<'a>> {
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match self {
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Self::None(up) => up.handle(bitmap, encoder),
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Self::Bitmap(up) => up.handle(bitmap, encoder),
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Self::RemoteFx(up) => up.handle(bitmap, encoder),
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}
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}
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}
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trait BitmapUpdateHandler {
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fn handle<'a>(&mut self, bitmap: BitmapUpdate, encoder: &'a mut PduEncoder) -> Result<UpdateFragmenter<'a>>;
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}
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struct NoneHandler;
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impl BitmapUpdateHandler for NoneHandler {
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fn handle<'a>(&mut self, bitmap: BitmapUpdate, encoder: &'a mut PduEncoder) -> Result<UpdateFragmenter<'a>> {
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let stride = usize::from(bitmap.format.bytes_per_pixel()) * usize::from(bitmap.width.get());
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let mut data = Vec::with_capacity(stride * usize::from(bitmap.height.get()));
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for row in bitmap.data.chunks(bitmap.stride).rev() {
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data.extend_from_slice(&row[..stride]);
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}
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encoder.set_surface(bitmap, CodecId::None as u8, &data)
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}
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}
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struct BitmapHandler {
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bitmap: BitmapEncoder,
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}
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impl BitmapHandler {
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fn new() -> Self {
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Self {
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bitmap: BitmapEncoder::new(),
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}
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}
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}
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impl BitmapUpdateHandler for BitmapHandler {
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fn handle<'a>(&mut self, bitmap: BitmapUpdate, encoder: &'a mut PduEncoder) -> Result<UpdateFragmenter<'a>> {
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let len = loop {
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match self.bitmap.encode(&bitmap, self.buffer.as_mut_slice()) {
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match self.bitmap.encode(&bitmap, encoder.buffer.as_mut_slice()) {
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Err(e) => match e.kind() {
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ironrdp_core::EncodeErrorKind::NotEnoughBytes { .. } => {
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self.buffer.resize(self.buffer.len() * 2, 0);
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debug!("encoder buffer resized to: {}", self.buffer.len() * 2);
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encoder.buffer.resize(encoder.buffer.len() * 2, 0);
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debug!("encoder buffer resized to: {}", encoder.buffer.len() * 2);
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}
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_ => Err(e).context("bitmap encode error")?,
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@ -153,7 +180,71 @@ impl UpdateEncoder {
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}
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};
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Ok(UpdateFragmenter::new(UpdateCode::Bitmap, &self.buffer[..len]))
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Ok(UpdateFragmenter::new(UpdateCode::Bitmap, &encoder.buffer[..len]))
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}
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}
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struct RemoteFxHandler {
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remotefx: RfxEncoder,
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codec_id: u8,
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}
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impl RemoteFxHandler {
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fn new(algo: EntropyBits, codec_id: u8) -> Self {
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Self {
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remotefx: RfxEncoder::new(algo),
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codec_id,
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}
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}
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}
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impl BitmapUpdateHandler for RemoteFxHandler {
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fn handle<'a>(&mut self, bitmap: BitmapUpdate, encoder: &'a mut PduEncoder) -> Result<UpdateFragmenter<'a>> {
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let mut buffer = vec![0; bitmap.data.len()];
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let len = loop {
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match self.remotefx.encode(&bitmap, buffer.as_mut_slice()) {
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Err(e) => match e.kind() {
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ironrdp_core::EncodeErrorKind::NotEnoughBytes { .. } => {
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buffer.resize(buffer.len() * 2, 0);
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debug!("encoder buffer resized to: {}", buffer.len() * 2);
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}
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_ => Err(e).context("RemoteFX encode error")?,
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},
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Ok(len) => break len,
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}
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};
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encoder.set_surface(bitmap, self.codec_id, &buffer[..len])
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}
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}
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struct PduEncoder {
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buffer: Vec<u8>,
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}
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impl PduEncoder {
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fn new() -> Self {
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Self { buffer: vec![0; 16384] }
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}
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fn encode(&mut self, pdu: impl Encode) -> Result<&[u8]> {
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let pos = loop {
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let mut cursor = WriteCursor::new(self.buffer.as_mut_slice());
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match pdu.encode(&mut cursor) {
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Err(e) => match e.kind() {
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ironrdp_core::EncodeErrorKind::NotEnoughBytes { .. } => {
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self.buffer.resize(self.buffer.len() * 2, 0);
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debug!("encoder buffer resized to: {}", self.buffer.len() * 2);
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}
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_ => Err(e).context("PDU encode error")?,
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},
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Ok(()) => break cursor.pos(),
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}
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};
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Ok(&self.buffer[..pos])
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}
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fn set_surface(&mut self, bitmap: BitmapUpdate, codec_id: u8, data: &[u8]) -> Result<UpdateFragmenter<'_>> {
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@ -176,39 +267,8 @@ impl UpdateEncoder {
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extended_bitmap_data,
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};
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let cmd = SurfaceCommand::SetSurfaceBits(pdu);
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let len = self.encode_pdu(cmd)?;
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Ok(UpdateFragmenter::new(UpdateCode::SurfaceCommands, &self.buffer[..len]))
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}
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fn remotefx_update(&mut self, bitmap: BitmapUpdate) -> Result<UpdateFragmenter<'_>> {
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let (remotefx, codec_id) = self.remotefx.as_mut().unwrap();
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let codec_id = *codec_id;
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let mut buffer = vec![0; bitmap.data.len()];
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let len = loop {
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match remotefx.encode(&bitmap, buffer.as_mut_slice()) {
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Err(e) => match e.kind() {
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ironrdp_core::EncodeErrorKind::NotEnoughBytes { .. } => {
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buffer.resize(buffer.len() * 2, 0);
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debug!("encoder buffer resized to: {}", self.buffer.len() * 2);
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}
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_ => Err(e).context("RemoteFX encode error")?,
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},
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Ok(len) => break len,
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}
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};
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self.set_surface(bitmap, codec_id, &buffer[..len])
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}
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fn none_update(&mut self, bitmap: BitmapUpdate) -> Result<UpdateFragmenter<'_>> {
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let stride = usize::from(bitmap.format.bytes_per_pixel()) * usize::from(bitmap.width.get());
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let mut data = Vec::with_capacity(stride * usize::from(bitmap.height.get()));
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for row in bitmap.data.chunks(bitmap.stride).rev() {
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data.extend_from_slice(&row[..stride]);
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}
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self.set_surface(bitmap, CodecId::None as u8, &data)
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let buf = self.encode(cmd)?;
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Ok(UpdateFragmenter::new(UpdateCode::SurfaceCommands, buf))
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}
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}
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