Commit Graph

7 Commits

Author SHA1 Message Date
Corentin Chary 380282b07d vnc: add basic tight support
Add support for tight encoding [1]. This patch only add support
for "basic" tight compression without any filter.

[1] http://tigervnc.org/cgi-bin/rfbproto#tight-encoding.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-06-01 12:53:09 -05:00
Corentin Chary a885211eed vnc: return the number of rectangles
Some encodings like tight supports tiling (spliting in
multiple sub-rectangles). So we needed a way to tell
vnc_update_client() how much rectangles are in the buffer.

zlib, raw and hextile always send a full rectangle.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-06-01 12:53:09 -05:00
Corentin Chary 161c4f20bf vnc: remove a memory leak in zlib
Makes sure we free all ressources used in zlib encoding (zlib stream
and buffer).

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-06-01 12:53:09 -05:00
Corentin Chary 78c98c7870 vnc: don't clear zlib stream on set_encoding
On init, values are already NULL, but we shouldn't try
to reset them each time a client send a set encoding
command because this break everything. For example,
libvncclient re-send a set encoding command if the
framebuffer is resized.

This fix framebuffer resizing for zlib encoding.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-06-01 12:53:09 -05:00
Corentin Chary 9f643ec0f8 vnc: adjust compression zstream level
Adjust zlib compression level if needed by calling deflateParams.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-06-01 12:53:09 -05:00
Corentin Chary b05ad290e2 vnc: only use a single zlib stream
According to http://tigervnc.org/cgi-bin/rfbproto#zlib-encoding
zlib encoding only uses a single stream. Current implementation defines
4 streams but only uses the first one. Remove them and only use a single
stream.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-06-01 12:53:09 -05:00
Corentin Chary 70a4568fe0 vnc: split encoding in specific files
This will allow to implement new encodings (tight, zrle, ..)
in a cleaner way. This may hurt performances, because some
functions like vnc_convert_pixel are not static anymore, but
should not be a problem with gcc 4.5 and the new -flto.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-05-03 12:09:47 -05:00