- As with the encoder, the decoder now uses the TurboJPEG wrapper, which
allows it to decode JPEG images directly into the framebuffer. This
eliminates a buffer copy (CopyRectangle()) as well as the expensive
RGB pixel conversion in DecompressJpegRectBPP(). The TurboJPEG
wrapper performs RGB pixel conversion more optimally, and only when
necessary (it uses the libjpeg-turbo colorspace extensions when
available, in order to avoid RGB conversion.)
- The other Tight subencoding types are also now decoded directly into
the framebuffer, which eliminates buffer copies.
- The Tight decoder now supports the rfbTightNoZlib extension, which
allows the server to bypass zlib compression when Compression Level 0
is selected. The encoder already supports this extension. Passing
the data stream through zlib when Compression Level 0 is selected
needlessly wastes CPU time, since all zlib is doing is copying the
data internally into its own structures.
Christian Beier
DRC
Balazs Ludmany
steven_carr
runge
dscho