Include Tight decoding optimizations from TurboVNC

- 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.

1 files changed, 7 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f605202..caf1832 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -317,6 +317,13 @@ set(LIBVNCCLIENT_SOURCES
     ${COMMON_DIR}/minilzo.c
 )
 
+if(JPEG_FOUND)
+  set(LIBVNCCLIENT_SOURCES
+    ${LIBVNCCLIENT_SOURCES}
+    ${COMMON_DIR}/turbojpeg.c
+  )
+endif()
+
 if(GNUTLS_FOUND)
   set(LIBVNCCLIENT_SOURCES
     ${LIBVNCCLIENT_SOURCES}