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| 1 | +use ironrdp_core::{impl_as_any, ReadCursor}; |
| 2 | +use ironrdp_dvc::{DvcClientProcessor, DvcMessage, DvcProcessor}; |
| 3 | +use ironrdp_graphics::zgfx; |
| 4 | +use ironrdp_pdu::{decode_cursor, decode_err, PduResult}; |
| 5 | +use tracing::trace; |
| 6 | + |
| 7 | +use crate::{ |
| 8 | + pdu::{CapabilitiesAdvertisePdu, CapabilitiesV8Flags, CapabilitySet, GfxPdu}, |
| 9 | + CHANNEL_NAME, |
| 10 | +}; |
| 11 | + |
| 12 | +/// Max capacity to keep for decompressed buffer when cleared. |
| 13 | +const MAX_DECOMPRESSED_BUFFER_CAPACITY: usize = 16384; // 16 KiB |
| 14 | + |
| 15 | +pub trait GraphicsPipelineHandler: Send { |
| 16 | + fn capabilities(&self) -> Vec<CapabilitySet> { |
| 17 | + vec![CapabilitySet::V8 { |
| 18 | + flags: CapabilitiesV8Flags::empty(), |
| 19 | + }] |
| 20 | + } |
| 21 | + |
| 22 | + fn handle_pdu(&mut self, pdu: GfxPdu) { |
| 23 | + trace!(?pdu); |
| 24 | + } |
| 25 | +} |
| 26 | + |
| 27 | +/// A client for the Graphics Pipeline Virtual Channel. |
| 28 | +pub struct GraphicsPipelineClient { |
| 29 | + handler: Box<dyn GraphicsPipelineHandler>, |
| 30 | + decompressor: zgfx::Decompressor, |
| 31 | + decompressed_buffer: Vec<u8>, |
| 32 | +} |
| 33 | + |
| 34 | +impl GraphicsPipelineClient { |
| 35 | + pub fn new(handler: Box<dyn GraphicsPipelineHandler>) -> Self { |
| 36 | + Self { |
| 37 | + handler, |
| 38 | + decompressor: zgfx::Decompressor::new(), |
| 39 | + decompressed_buffer: Vec::new(), |
| 40 | + } |
| 41 | + } |
| 42 | +} |
| 43 | + |
| 44 | +impl_as_any!(GraphicsPipelineClient); |
| 45 | + |
| 46 | +impl DvcProcessor for GraphicsPipelineClient { |
| 47 | + fn channel_name(&self) -> &str { |
| 48 | + CHANNEL_NAME |
| 49 | + } |
| 50 | + |
| 51 | + fn start(&mut self, _channel_id: u32) -> PduResult<Vec<DvcMessage>> { |
| 52 | + let pdu = GfxPdu::CapabilitiesAdvertise(CapabilitiesAdvertisePdu(self.handler.capabilities())); |
| 53 | + |
| 54 | + Ok(vec![Box::new(pdu)]) |
| 55 | + } |
| 56 | + |
| 57 | + fn process(&mut self, _channel_id: u32, payload: &[u8]) -> PduResult<Vec<DvcMessage>> { |
| 58 | + self.decompressed_buffer.clear(); |
| 59 | + self.decompressed_buffer.shrink_to(MAX_DECOMPRESSED_BUFFER_CAPACITY); |
| 60 | + self.decompressor |
| 61 | + .decompress(payload, &mut self.decompressed_buffer) |
| 62 | + .map_err(|e| decode_err!(e))?; |
| 63 | + |
| 64 | + let mut cursor = ReadCursor::new(self.decompressed_buffer.as_slice()); |
| 65 | + while !cursor.is_empty() { |
| 66 | + let pdu = decode_cursor(&mut cursor).map_err(|e| decode_err!(e))?; |
| 67 | + self.handler.handle_pdu(pdu); |
| 68 | + } |
| 69 | + |
| 70 | + Ok(vec![]) |
| 71 | + } |
| 72 | +} |
| 73 | + |
| 74 | +impl DvcClientProcessor for GraphicsPipelineClient {} |
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