Method decodeRect

java/com/tigervnc/rfb/TightDecoder.java:183–408

(Rect r, Object buffer,
                         int buflen, ServerParams server,
                         ModifiablePixelBuffer pb)

  }

  public void decodeRect(Rect r, Object buffer,
                         int buflen, ServerParams server,
                         ModifiablePixelBuffer pb)
  {
    ByteBuffer bufptr;
    PixelFormat pf = server.pf();

    int comp_ctl;

    bufptr = ByteBuffer.wrap((byte[])buffer);

    assert(buflen >= 1);

    comp_ctl = bufptr.get() & 0xff;
    buflen -= 1;

    // Reset zlib streams if we are told by the server to do so.
    for (int i = 0; i < 4; i++) {
      if ((comp_ctl & 1) != 0) {
        zis[i].reset();
      }
      comp_ctl >>= 1;
    }

    // "Fill" compression type.
    if (comp_ctl == tightFill) {
      if (pf.is888()) {
        ByteBuffer pix = ByteBuffer.allocate(4);

        assert(buflen >= 3);

        pf.bufferFromRGB(pix.duplicate(), bufptr, 1);
        pb.fillRect(pf, r, pix.array());
      } else {
        assert(buflen >= pf.bpp/8);
        byte[] pix = new byte[pf.bpp/8];
        bufptr.get(pix);
        pb.fillRect(pf, r, pix);
      }
      return;
    }

    // "JPEG" compression type.
    if (comp_ctl == tightJpeg) {
      int len;

      WritableRaster buf;

      JpegDecompressor jd = new JpegDecompressor();

      assert(buflen >= 4);

      len = bufptr.getInt();
      buflen -= 4;

      // We always use direct decoding with JPEG images
      jd.decompress(bufptr, len, pb, r, pb.getPF());
      pb.commitBufferRW(r);